NOTE: Johne's Disease may be viewed as one complete publication file below, or as individual chapter files at johnes.htm

USDA logo
United States
Department of
Agriculture


ARS logo
Agricultural
Research
Service


NAL logo
National
Agricultural
Library


AWIC logo
Animal Welfare
Information
Center


 

Johne's Disease--Mycobacterium avium subsp. paratuberculosis: A Debilitating Enteric Disease of Ruminants

June 2002 (Revised October 2006)

 


Compiled by:

Jean Larson
Animal Welfare Information Center
National Agricultural Library
U.S. Department of Agriculture

Published by:

U.S. Department of Agriculture
Agricultural Research Service
National Agricultural Library
Animal Welfare Information Center
Beltsville, MD 20705
E-mail: awic@nal.usda.gov
Web site: http://awic.nal.usda.gov

Policies and Links




Contents

Introduction       Notes about this Document        Bibliography





Introduction

There are many loses in the livestock industry as a result of the bacterial disease called Johne's disease. "The disease occurs across the US and many foreign countries and is one of the most economically important disease of cattle." 3.   The effects of this contagious disease lead to reduced milk, fetal loss and early death. This disease is caused by a bacterium Mycobacterium avium subsp. paratuberculosis. This family of bacteria causes a variety of disease scourges such as tuberculosis, leporsy, cervical lymphadenitis, Aswimming pool granuloma, chronic pulmonary diseases and Johne's disease. Johne's disease is known to affect cattle, sheep, llamas, camels, goats, farmed deer, bison, and other domestic and wild ruminants. It may be the cause of some wasting diseases in horses and swine. Also, chickens can be successfully infected with it. The disease can also be transmitted to laboratory animals in a laboratory setting.   It may also be an agent of the Crohn=s disease in humans. There is conflicting information about the zoonotic risks of the disease, but interaction with diseased animals should be done with caution. Johne's is found world-wide.

The disease. Although the infection is usually acquired early in life, the clinical signs can take 2-6 years to develop. Clinical signs in cattle include severe wasting due to prolonged diarrhea, dehydration, and emaciation with lethal consequences. (In other susceptible animals the clinical signs are somewhat different.) In cattle the intestinal wall becomes thickened and has transverse folds called rugae. The surface looks corrugated. Lymph nodes are also affected and at times there are lesions in the liver, spleen, lungs, kidneys. Infections in the uterus and placenta can lead to congenital infection and abortion. Most cattle are infected when young through contaminated feed, colostrum, milk, contaminated bedding and water. The organism is often shed in large number in the feces and for long periods of time. It can live for long periods in fecal material and depending on the environmental and soil conditions, has been known to survive up to 1 year.

Diagnosis. Diagnosis of the disease in live individual animals is difficult for a number of reasons. To date, "there is no single, good test for paratuberculosis and a combination of tests is often used." 1. It seems that it is easier to diagnosis the presence in a herd as apposed to individual animals. Most of the time, the definitive diagnosis is done after an animal has died. Note that in the bibliography, there is research going on to attempt to develop better diagnostic methods for this difficult disease.

Control measures. There is no satisfactory treatment for the disease. The trend toward intensive has made control more difficult. Disease control is via implementing a variety of production practices. Some of the production practices include culling of affected animals, and removal of calves from dams immediately following birth. The calves are then fed pasturized colostrum that is free of fecal contamination and raising them in a facility that is separate from adult cows. Fecal culturing of all cows in a herd can catch those affected early on. Manure removal and facility cleaning can help control the disease. Since a basic soil discourages bacterial survival in soil, liming of pastures is helpful.

Vaccines used in calfhood can be effective in reducing the incidence, but they do not totally eliminate disease. A more effective vaccine is also being researched at this time, but vaccination does not eliminate the need for good production practices.

Resources used above:

1. Aiello, Susan E. and Asa Mays (eds.) The Merck Veterinary Manual, 8th edition. Whitehouse Station, N. J. The Merck & Co, Inc. 1998, p.537-539.

2. Jones, Thomas Carlyle and Ronald Duncan Hunt. Veterinary Pathology, 5th edition. Philadelphia, Lea & Febiger. 1983. p 648-664.

3. U.S. Department of Agriculture. 1984 Yearbook of Agriculture. Animal Health. Washington, D.C.. The Department. 1984 p. 158-160.

Additional information:

Genome Sequencing Completed for Major Dairy Cattle Microbe

Manual of Standards Diagnostic Tests and Vaccines. Part 2, Section 2.2, Chapter 2.2.6. Paratuberculosis (Johne's Disease)



Notes about this Document

This document was compiled from various databases. The information is organized alphabetically by author and by publication year. Where there were abstracts in the database, they have been included in this document. The National Agricultural Library call numbers are included.

If the reader is interested in obtaining copies of the articles, you may request them on inter-library loan through your local library. Complete document delivery information is available at http://www.nal.usda.gov/services/request.shtml.
If you have comments or would like to submit additional information for inclusion in this document, please contact the compiler at jlarson@nal.usda.gov.



 

Bibliography

 

2006 / 2005 / 2004 / 2003 / 2002 / 2001 / 2000 / 1999 / 1998 / 1997 / 1996 / USDA and USDA Sponsored Research

2006

Bielanski, A.; Algire, J.; Randall, G.; Surujballi, O. Risks of transmitting Mycobacterium avium sp. paratuberculosis by transfer of in vivo-derived and in vitro-fertilized bovine embryos. Reproduction, Fertility and Development. 2006; 18(1-2): 212. ISSN: 1031-3613. Note: 32nd Annual Conference of the International Embryo Transfer Society, Orlando, Florida, January 7-11, 2006.
NAL Call No.: QP251.R47
Descriptors: Mycobacterium avium subsp. paratuberculosis, disease transmission risks, fertile bovine embryo transfer, comparison between in vitro and in vivo.

Rosseels, Valerie; Marche, Sylvie; Roupie, Virginie; Govaerts, Marc; Godfroid, Jacques; Walravens, Karl; Huygen, Kris. Members of the 30- to 32-kilodalton mycolyl transferase family (Ag85) from culture filtrate of Mycobactelium avium subsp. paratuberculosis are immunodominant Th1-type antigens recognized early upon infection in mice and cattle. Infection and Immunity. 2006; 74(1): 202-212. ISSN: 0019-9567.
URL: http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=87
NAL Call No.: QR1.I57
Descriptors: calves, Mycobacterium avium subsp. paratuberculosis strain ATCC 19698, cattle, B6 bg/bg beige mouse strain, Mycobacterium bovis, vaccine development, protective antigens, culture filtrate, 10 weeks post experimental oral infection, lymphoproliferative responses of peripheral blood mononuclear cells, T cells.


Return to Contents

2005

Alvarez, J.; Juan, L. de; Briones, V.; Romero, B.; Aranaz, A.; Fernandez-Garayzabal, J.F.; Mateos, A.  Mycobacterium avium subspecies paratuberculosis in fallow deer and wild boar in Spain.  Veterinary Record.  2005; 156(7): 212-213.  ISSN: 0042-4900.
URL:  http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, disease incidence, fallow deer, wild boar, Spain.

Aly, S.S.; Thurmond, M.C.  Evaluation of Mycobacterium avium subsp. paratuberculosis infection of dairy cows attributable to infection status of the dam.  Journal of the American Veterinary Medical Association.  2005; 227(3): 450-454.  ISSN: 0003-1488.
URL:  http://www.avma.org/
NAL Call No.:  41.8 AM3
Descriptors:  Mycobacterium avium subsp. paratuberculosis, dairy cow infection, transmission levels from mother to calves.

Anonymous.  3rd Annual Symposium of Veterinary Microbiology and Immunology, Bet Dagan, Israel.  Israel Journal of Veterinary Medicine.  2005; 60(1): 33-38.  ISSN:  0334-9152.
Descriptors:  domestic animals, cats, dogs, cattle, pigs, West Nile virus, Streptococcus, Mycobacterium avium subsp. paratuberculosis, laboratory animals, fish, various topics, infectious diseases, immunology.

Aradaib, I.E.; Abbas, Z.A.; Abbas, B.; El Sanousi, S.M.  Evaluation of conventional methods and nested PCR (nPCR) for detection of paratuberculosis in goats.  Veterinary Research Communications.  2005; 29(5): 381-385. ISSN:  0165-7380.  
URL:  http://www.springerlink.com/(adb1ua55ubfoab45vpcz30vb)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:103009,1
NAL Call No.:  SF601.V38
Descriptors:  goats, Mycobacterium avium subsp. paratuberculosis, clinical aspects, diagnostic methods, PCR, animal pathology, case reports, paratuberculosis, postmortem examinations, Sudan. 

Archuleta, Rebecca Joy; Hoppes, Patricia Yvonne; Primm, Todd P.  Mycobacterium avium, enters a state of metabolic dormancy in response to starvation.  Tuberculosis.  2005; 85(3): 147-158.  ISSN:  1472-9792.
URL:  http://www.sciencedirect.com/science/journal/14729792
Descriptors:  Mycobacterium avium complex, biphasic response to starvation, lipid catabolism, mycolate modification, loss of catalase and urease activities, sensitivity reduction to antibiotics, atanine tRNA synthetase decline, increase in ribonuclease E levels, metabolic dormancy, primary reservoir is natural and municipal water.

Basler, T.; Goethe, R.  IRG1 is differentially regulated at the transcriptional and posttranscriptional level in LPS stimulated and Mycobacterium avium ssp paratuberculosis infected murine macrophages.  Immunobiology.  2005; 210(6-8): 395.  ISSN:  0171-2985.  Note: Joint Annual Meeting of the German and Scandinavian Societies of Immunology, Kiel, Germany, September 21-24, 2005. 
NAL Call No.:  QR180.Z4
Descriptors:  Mycobacterium avium subsp. paratuberculosis, IRG1 gene, gene expression, in vitro, murine macrophages.

Begg, D.J.; O'Brien, R.; Mackintosh, C.G.; Griffin, J.F.T.  Experimental infection model for Johne's disease in sheep. Infection and Immunity.  2005; 73(9): 5603-5611.  ISSN: 0019-9567.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=87
NAL Call No.:  QR1.I57
Abstract:  Johne's disease in ruminants results in chronic enteritis caused by the pathogenic bacterium Mycobacterium avium subsp. paratuberculosis.  This study examined two M. avium subsp. paratuberculosis strains (JD3 and W), using different doses and routes of infection, to establish the optimal time postchallenge when predictable levels of infection, gut lesions, and clinical disease occur in a large proportion of sheep.  While a small proportion (25%) of sheep challenged with a low-passage-number laboratory culture of M. avium subsp. paratuberculosis (strain W) became infected, no infection was found in animals exposed to a high-passage-number culture isolate of strain W.  In contrast, a primary tissue homogenate of M. avium subsp. paratuberculosis (JD3) resulted in high (90%) infection rates and gut histopathology following oral or intratonsillar challenge.  The optimal conditions necessary to produce Johne's disease involve oral inoculation of 3-month-old lambs with four doses of 5 x 108 CFU of M. avium subsp. paratuberculosis isolated directly from the gut lymphatic tissues of clinically affected sheep.  This resulted in consistent gut histopathology at 9 months and the onset of clinical disease by 11 months postchallenge.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, strain comparison, strain W, strain JD3, animal disease model, oral inoculations of lambs, dosing regimen, optimum conditions, dosing age.

Begg, D.J.; Griffin, J.F.T.  Vaccination of sheep against M. paratuberculosis: immune parameters and protective efficacy.  Vaccine.  2005; 23(42): 4999-5008.  ISSN:  0264-410X.
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, Neoparasec (TM) vaccine, comparison study, aqueous formulation of Map 316F (AquaVax), tested in sheep,  vaccination and challenge with virulent strain, immunological study, blood, lymphoid tissue in gut, CD4(+), CD8(+), CD25(+), B cells.

Berghaus, Roy D.; Lombard, Jason E.; Gardner, Ian A.; Farver, Thomas B.  Factor analysis of a Johne's disease risk assessment questionnaire with evaluation of factor scores and a subset of original questions as predictors of observed clinical paratuberculosis.  Preventive Veterinary Medicine.  2005; 72(3-4): 291-309.  ISSN:  0167-5877.
URL:  http://www.sciencedirect.com/science/journal/01675877
NAL Call No.:  SF601.P7
Descriptors:  Johne’s disease risk assessment, 815 US dairy operations, questionnaire of 38 variables, model based logistic regression analysis, predictive ability of variables, suggested revision of questionnaire, United States.

Biet, Franck; Boschiroli, Maria Laura; Thorel, Marie Francoise; Guilloteau, Laurence A.  Zoonotic aspects of Mycobacterium bovis and Mycobacterium avium intracellulare complex (MAC).  Veterinary Research. 2005; 36(3): 411-436.  ISSN:  0928-4249.  
NAL Call No.:  SF602.A5
Descriptors:  livestock, cattle, humans, wildlife, Mycobacterium bovis, Mycobacterium, Mycobacterium avium subsp. paratuberculosis, disease transmission, acquired immune deficiency syndrome, disease control programs, environmental reservoirs of pathogens, epidemiology, tuberculosis, zoonoses, Johne’s disease, Crohn’s disease.

Bires, J.; Juras, M.; Beracova, L.  Plan kontroly a eradikacie paratuberkulozy na Slovensku.  [Plan for paratuberculosis control and eradication in Slovakia.]  Slovensky Veterinarsky Casopis.  2005; 30(4): 221-223. ISSN:  1335-0099.  Note:  In Slovakian.  
Descriptors:  cattle, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, disease control programs, disease prevalence, disease prevention, epidemiology, paratuberculosis.

Bogli-Stuber, K.; Kohler, C.; Seitert, G.; Glanemann, B.; Antognoli, M.C.; Salman, M.D.; Wittenbrink, M.M.; Wittwer, M.; Wassenaar, T.; Jemmi, T.; Bissig-Choisat, B.  Detection of Mycobacterium avium subspecies paratuberculosis in Swiss dairy cattle by real-time PCR and culture: a comparison of the two assays.  Journal of Applied Microbiology. 2005; 99(3): 587-597.  ISSN:  1364-5072.
URL:  http://www.blackwellpublishing.com/journal.asp?ref=1364-5072
NAL Call No.:  QR1.J687
Descriptors:  Swiss dairy cattle, diagnostic assays, Mycobacterium avium subsp. paratuberculosis, fecal sampling, 13 dairy herds, in vitro culture, real time PCR, alternative method, Switzerland.

Bradley, T.L.; Cannon, R.M.  Determining the sensitivity of abattoir surveillance for ovine Johne's disease. Australian Veterinary Journal.  2005; 83(10): 633-636.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, Johne's disease, intestinal tract lesions, post slaughter sampling, diagnostic test validation, histopathological examination, experienced meat inspectors, sheep identification, inspector surveillance was 70%.

Brugere-Picoux, J.; Maillard, R.; Douart, A.  Paratubercolosi: quali test diagnostici utilizzare?  [Paratuberculosis: which diagnostic tests to use?]  Summa.  2005; 22(6): 50-54, 2.  Note:  In Italian with an English summary.  
Descriptors:  Mycobacterium avium subsp. paratuberculosis, diagnostic assays, fecal culture, PCR, mesenteric lymph note biopsy, immunological methods, complement fixation, indirect immunofluorescence, gel precipitation test, ELISA, review of advantages and disadvantages.

Bujnakova, D.; Melicharek, I.; Feckova, M.; Skarbova, B.; Kmet', V.  Detekcia a kvantifikacia Mycobacterium paratuberculosis pomocou Real Time PCR u hovadzieho dobytka.  [Detection and quantification of Mycobacterium paratuberculosis using the real time PCR in cattle.]  Slovensky Veterinarsky Casopis.  2005; 30(3): 174-175.  ISSN:  1335-0099.  Note:  In Slovakian with an English summary.  
Descriptors:  cattle, fecal sampling, PCR, IS900, Mycobacterium avium subsp. paratuberculosis, detection method, quantitative analysis, Slovakia.

Bulte, Michael; Schoenenbruecher, Holger; Abdulmawjood, Amir.  From farm to fork - Mycobacterium avium ssp. paratuberculosis (MAP) als Zoonoseerreger?  [From farm to fork - Mycobacterium avium ssp paratuberculosis (MAP) as zoonotic agent?]  Berliner und Munchener Tierarztliche Wochenschrift.  2005; 118(9-10): 377-385. ISSN:  0005-9366.  Note:  In German with an English summary.
NAL Call No.:  41.8 B45
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Crohn’s disease, potential zoonotic disease, transmission from infected animals to humans, intensive research for diagnosis, valid epidemiological investigations.

Cheng, J.; Bull, T.J.; Dalton, P.; Cen, S.; Finlayson, C.; Hermon Taylor, J.  Mycobacterium avium subspecies paratuberculosis in the inflamed gut tissues of patients with Crohn's disease in China and its potential relationship to the consumption of cow's milk:  A preliminary study.  World Journal of Microbiology and Biotechnology.  2005; 21(6-7): 1175-1179.  ISSN:  0959-3993.
URL:http://www.springerlink.com/(dtfvovf5jv3uot2uol4kxtvj)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100229,1
NAL Call No.:  QR1.M562
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, Crohn’s disease, milk production and consumption increases in China, Mycobacterium avium subsp. paratuberculosis in intestines of human’s with Crohn’s, possible association with Mycobacterium avium subsp. paratuberculosis, recommend testing dairy herds and retail milk.

Conraths, F.J.; Kohler, H.; Werner, O.; Beer, M.; Depner, K.R.; Geue, L.; Kaden,V.; Staubach, C.; Potzsch, C.; Schares, G.; Mettenleiter, T.C.  The "Friedrich-Loeffler-Institut": past, present and future of research in infectious diseases of animals.  Berliner und Munchener Tierarztliche Wochenschrift.  2005; 118(9/10): 354-364.  ISSN:  0005-9366. Note:  In English with a German summary.
NAL Call No.:  41.8 B45
Descriptors:  Friedrich-Loeffler-Institut, research accomplishments, history, poultry, pigs, livestock, animal diseases, aquatic animals, infectious diseases, biosafety, diagnosis, diagnostic techniques, foot and mouth disease, neosporosis, parasitoses, paratuberculosis, prion diseases, swine fever, zoonoses, Aphthovirus, avian influenza, Mycobacterium avium subsp. paratuberculosis, Neospora caninum, swine fever virus, Germany.  

Corn, Joseph L.; Manning, Elizabeth J.B.; Sreevatsan, Srinand; Fischer, John R.  Isolation of Mycobacterium avium subsp. paratuberculosis from free-ranging birds and mammals on livestock premises.  Applied and Environmental Microbiology.  2005; 71(11): 6963-6967.  ISSN:  0099-2240.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=83
NAL Call No.:  448.3 AP5
Descriptors:  dairy farms, 25 mammalian species sampled, 22 avian species sampled, Mycobacterium avium subsp. paratuberculosis, ileum, liver, intestinal lymph nodes, feces, radiometric culture, acid fast isolates, 16S/IS900/IS1311 PCR and mycobactin dependency testing, 9 mammals and 3 avian species were positive, effect probably negative compared to manure, Wisconsin, Georgia, United States.

Coussens, P.M.; Pudrith, C.B.; Skovgaard, K.; Ren, X.; Suchyta, S.P.; Stabel, J.R.; Heegaard, P.M.H.  Johne's disease in cattle is associated with enhanced expression of genes encoding IL-5, GATA-3, tissue inhibitors of matrix metalloproteinases 1 and 2, and factors promoting apoptosis in peripheral blood mononuclear cells.  Veterinary Immunology and Immunopathology.  2005; 105(3-4): 221-234.  ISSN: 0165-2427.  Note:  In the special issue: Functional Genomics of Host-Pathogen Interactions in Species of Veterinary Importance, edited by E.J. Glass and P.M. Coussens.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776
NAL Call No.:  SF757.2.V38
Descriptors:  Mycobacterium avium subsp. paratuberculosis, cattle disease, peripheral mononuclear blood cells, enhanced gene expression, IL-5, GATA-3, tissue inhibitors, metalloproteinases 1 and 2, apoptosis.

Crossley, Beate M.; Zagmutt Vergara, Francisco J.; Fyock, Terry L.; Whitlock, Robert H.; Gardner, Ian A.  Fecal shedding of Mycobacterium avium subsp. paratuberculosis by dairy cows. Veterinary Microbiology.  2005; 107(3-4): 257-263. ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  786 dairy cows; shedding Mycobacterium avium subsp. paratuberculosis, 93 dairy herds, disease prevalence, fecal sampling, cultured in Herrold's egg yolk medium, livestock numbers, seasonal variation, herd size, multivariable negative binomial model, Pennsylvania.

D'Haese, E.; Dumon, I.; Werbrouck, H.; de Jonghe, V.; Herman, L.  Improved detection of Mycobacterium paratuberculosis in milk.  Journal of Dairy Research.  2005; 72(Special issue): 125-128.  ISSN:  0022-0299.
URL:  http://journals.cambridge.org/action/displayJournal?jid=DAR&bVolume=y
NAL Call No.:  44.8 J823
Descriptors:  Mycobacterium avium subsp. paratuberculosis, detection in milk samples, sample pretreatment, solid phase cytometry, detection of viable cells in 1 day.

Deutz, Armin; Spergser, Joachim; Wagner, Peter; Rosengarten, Renate; Koefer, Josef.  Nachweise von Mycobacterium avium subsp. paratuberculosis bei wildtieren und rindern in der Steiermark/Osterreich.  [Mycobacterium avium subsp. paratuberculosis in wild animal species and cattle in Styria/Austria.]  Berliner und Munchener Tierarztliche Wochenshrift.  2005; 118(7-8): 314-320.  ISSN:  0005-9366.  Note:  In German.
NAL Call No.:  41.8 B45
Descriptors:  clinical aspects, diarrhea, epidemiology, disease prevalence, disease surveys, disease transmission, fetus, histopathology, liver, lungs, lymph nodes, Johne’s disease, paratuberculosis, wild animals, cattle, Capra ibex, Capreolus capreolus, red deer, Cervus elaphus, chamois, fallow deer, foxes, hares, mouflon, Mycobacterium avium subsp. paratuberculosis, Austria.

Djonne, B.; Pavlik, I.; Svastova, P.; Bartos, M.; Holstad, G.  IS900 restriction fragment length polymorphism (RFLP) analysis of Mycobacterium avium subsp. paratuberculosis isolates from goats and cattle in Norway. Acta Veterinaria Scandinavica.  2005; 46(1/2): 13-18.  ISSN:  1751-0147.  Note:  In English with a Danish summary.
NAL Call No.:  41.8 AC87
Descriptors:  cattle, goats, Mycobacterium avium subsp. paratuberculosis, genotype variation, 51 isolates from goats, 4 isolates from cattle, IS900 RFLP analysis, no differences in host origin, epidemiological surveys, 5 new RFLP found, epidemiology, genetic variation, genotypes, paratuberculosis, Norway.

Donat, K.; Eulenberger, Karin; Kaempfer, Petra.  Blutserologische Untersuchungen zur Verbreitung von Mycobacterium avium spp. paratuberculosis in sachsischen Rinderbestanden.  [Seroprevalence of paratuberculosis in cattle in Saxony.]  Tieraerztliche Umschau.  2005; 60(9): 497-501.  ISSN:  0049-3864.  Note:  In German.
NAL Call No.:  41.8 T445
Descriptors:  Saxon cattle herds, blood sampling (55,394) for antibody testing, Mycobacterium avium subsp. paratuberculosis, commercial test IDEXX Worrstadt, prevalence testing, data on herd positives, Saxony, Germany. 

Douart, A.; Maillard, R.  Il controllo della paratubercolosi bovina.  [Monitoring of bovine paratuberculosis.] Summa. 2005; 22(6): 45-48, 2.  Note:  In Italian with an English summary.  
Descriptors:  cattle, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, PCR,  monitoring programs, disease surveys, control programs, disease prevention and control, vaccination, paratuberculosis, Italy.

Dunn, J.R.; Kaneene, J.B.; Grooms, D.L.; Bolin, S.R.; Bolin, C.A.; Bruning-Fann, C.S.  Effects of positive results for Mycobacterium avium subsp. paratuberculosis as determined by microbial culture of feces or antibody ELISA on results of caudal fold tuberculin test and interferon-gamma assay for tuberculosis in cattle.  Journal of the American Veterinary Medical Association.  2005; 226(3): 429-435.  ISSN: 0003-1488.
NAL Call No.:  41.8 AM3
Descriptors:  cattle, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, fecal culture, antibody ELISA, caudal fold TB test, interferon-gamma assay.

Dupont, Chris; Thompson, Keith; Heuer, Cord; Gicquel, Brigitte; Murray, Alan. Identification and characterization of an immunogenic 22 kDa exported protein of Mycobacterium avium subspecies paratuberculosis.  Journal of Medical Microbiology.  2005; 54(11): 1083-1092.  ISSN:  0022-2615.  
Descriptors:  Mycobacterium avium subsp. paratuberculosis, exported 22 kDa putative lipoprotein, alkaline phosphatase gene fusion library, LppX/LprAFG family of mycobacterial lipoproteins, antibody to p22, detected in vaccinated sheep, clinical and subclinical infected cows.

Durham, S.  ARS collaborates in regional dairy quality management alliance.  Agricultural Research.  2005; 53(4): 20.  ISSN: 0002-161X.
URL: http://www.ars.usda.gov/is/AR/
NAL Call No.:  1.98 AG84
Descriptors:  USDA, Agricultural Research Service, dairy industry, quality control, best management practices, dairy products, dairy cows, food safety, animal health, Mycobacterium avium subsp. paratuberculosis, food pathogens, Salmonella, Escherichia coli O157:H7, Listeria monocytogenes, Campylobacter, genetic techniques and protocols, milk analysis, New York, Pennsylvania, Vermont.

Elad, D.  The 3rd Annual Symposium of Veterinary Microbiology and Immunology. Bet-Dagan, Israel. December 2004.  Israel Journal of Veterinary Medicine.  2005; 60(1): 33-38, He 28-29.  ISSN:  0334-9152.
Descriptors:  dairy cattle, monkeys, cats, dogs, mice, pigs, fish, various animal diseases, diagnosis, diagnostic techniques, disease control, ELISA, epidemiology, pathogenesis, genomes, immunology, macrophages, immune responses, paratuberculosis, gastroenteritis, relapsing fever, West Nile fever, Mycobacterium avium subsp. paratuberculosis, Borrelia, Streptococcus iniae, Israel.

Ellingson, J.L.E.; Stabel, J.R.; Radcliff, R.P.; Whitlock, R.H.; Miller, J.M.  Detection of Mycobacterium avium subspecies paratuberculosis in free-ranging bison (Bison bison) by PCR.  Molecular and Cellular Probes.  2005; 19(3): 219-225.  ISSN:  0890-8508.  
URL: http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6959&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=a1d954773ca83f03ff7b5c0d870580ef
NAL Call No.:  RB43.7.M63
Descriptors:  North American Bison, free ranging animals, Mycobacterium avium subsp. paratuberculosis, detection with PCR, 25 animals with clinical signs of Johne’s disease, frozen and paraffin-embedded ileum, jejuniun, ileocecal lymph nodes, post slaughter, Mycobacterium avium subsp. paratuberculosis was found.

Eppleston, J.; Reddacliff, L.; Windsor, P.; Links, I.; Whittington, R.  Preliminary observations on the prevalence of sheep shedding Mycobacterium avium subsp. paratuberculosis after 3 years of a vaccination program for ovine Johne's disease.  Australian Veterinary Journal.  2005; 83(10): 637-638.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  Johne’s disease, sheep, vaccination, shedding, Mycobacterium avium subsp. paratuberculosis, Gudair, immunologic drug, immunostimulant drug, immunology, disease prevention and control, Australia.

Ezanno, P.; Van Schaik, G.; Weber, M.F.; Heesterbeek, J.A.P.  A modeling study on the sustainability of a certification-and-monitoring program for paratuberculosis in cattle. Veterinary Research.  2005; 36(5/6): 811-826.  ISSN:  0928-4249.  
NAL Call No.:  SF602.A5
Descriptors:  cattle, cattle herd health, disease monitoring, Mycobacterium avium subsp. paratuberculosis, Dutch disease control programs, certification disease control, Johne’s disease, paratuberculosis, computer model.

Gao, Anli; Odumeru, Joseph; Raymond, Melinda; Mutharia, Lucy.  Development of improved method for isolation of Mycobacterium avium subsp. paratuberculosis from bulk tank milk:  Effect of age of milk, centrifugation, and decontamination.  Canadian Journal of Veterinary Research.  2005; 69(2): 81-87.  ISSN:  0830-9000.  
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=133
NAL Call No.:  SF601.C24
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, Crohn’s disease, microbial contamination, isolating Mycobacterium avium subsp. paratuberculosis from bulk raw milk, spiking with 50-200 colonies/mL, centrifugation, decontamination, hexadecylpyridinium chloride.

Georgiadis, M.P.; Johnson, W.O.; Gardner, I.A.  Sample size determination for estimation of the accuracy of two conditionally independent tests in the absence of a gold standard.  Preventive Veterinary Medicine.  2005; 71(1/2): 1-10.  ISSN:  0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f NAL Call No.:  SF601.P7
Descriptors:  cattle, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, screening, testing accuracy, calculation, estimation, sample size, statistical analysis, techniques, Excel spreadsheet template http://www.epi.ucdavis.edu/diagnostictests/

Godfroid, J.; Delcorps, C.; Irenge, L.M.; Walravens, K.; Marche, S.; Gala, J.L.  Definitive differentiation between single and mixed mycobacterial infections in red deer (Cervus elaphus) by a combination of duplex amplification of p34 and f57 sequences and Hpy188I enzymatic restriction of duplex amplicons.  Journal of Clinical Microbiology.  2005; 43(9): 4640-4648.  
Descriptors:  wild red deer, diagnose molecular methods for species specific identification of Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, DNA banding patterns, before and after treatment with Hpy188I restriction of f57-upstream (us)-p34 duplex amplicons, duplex us-p34-f57 PCR and Hpy188I restriction excluded Mycobacterium bovis from Mycobacterium avium subsp. paratuberculosis and Mycobacterium avium subsp. avium, Belgium.

Gonzalez, J.; Geijo, M.V.; Garcia-Pariente, C.; Verna, A.; Corpa, J.M.; Reyes, L.E.; Ferreras, M.C.; Juste, R.A.; Marin, J.F. Garcia; Perez, V.  Histopathological classification of lesions associated with natural paratuberculosis infection in cattle.  Journal of Comparative Pathology.  2005; 133(2-3): 184-196.  ISSN:  0021-9975.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6861&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=6091bef4d15aae1adbceffba708c6eb8 NAL Call No.:  41.8 J82
Descriptors:  Mycobacterium avium subsp. paratuberculosis, cattle lesions, adult cows, with and without clinical signs, gut lymphoid tissue, 5 categories of lesions, ileum, jejunum, intestinal villi, thickening of intestinal wall.

Grant, Irene R.; Williams, Alan G.; Rowe, Michael T.; Muir, D. Donald.  Efficacy of various pasteurization time-temperature conditions in combination with homogenization on inactivation of Mycobacterium avium subsp. paratuberculosis in milk.  Applied and Environmental Microbiology.  2005; 71(6): 2853-2861.  ISSN:  0099-2240.  
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=83
NAL Call No.:  448.3 AP5
Descriptors:  Mycobacterium avium subsp. paratuberculosis, milk contamination, homogenization, pathogen inactivation, time/temperature conditions, HTST pasteurization.

Grant, I.R.; Williams, A.G.; Rowe, M.T.; Muir, D.D.  Investigation of the impact of simulated commercial centrifugation and microfiltration conditions on levels of Mycobacterium avium ssp. paratuberculosis in milk. International Journal of Dairy Technology.  2005; 58(3): 138-142.  ISSN:  1364-727X.
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=idt
NAL Call No.:  SF221.I58
Descriptors:  Mycobacterium avium subsp. paratuberculosis, microbial contaminate of raw milk, milk processing, decontamination process, centrifugation, microfiltration.

Griffin, J. Frank T.; Spittle, Evelyn; Rodgers, Christie R.; Liggett, Simon; Cooper, Marc; Bakker, Douwe; Bannantine, John P.  Immunoglobulin G1 enzyme-linked immunosorbent assay for diagnosis of Johne's disease in red deer (Cervus elaphus).  Clinical and Diagnostic Laboratory Immunology.  2005; 12(12): 1401-1409.  ISSN:  1071-412X.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=84
Descriptors:  farmed red deer, serodiagnosis, Johne’s disease, denatured purified protein derivative (PPDj), undenatured protoplasmic antigen (PpAg), ELISA, antigen reactivity of IgG1, compared non pathological and those with pathological diseases.

Groenendaal, H.  Control programs for Johne's disease.  Advances in Dairy Technology Proceedings of the Western Canadian Dairy Seminar.  2005; 17: 81-94.  ISSN: 1184-0684. Note:  Seminar held March 8-11, 2005, Red Deer, Alberta.
URL:  http://www.wcds.afns.ualberta.ca/
NAL Call No.:  SF223.W478
Descriptors:  dairy herds, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, disease prevalence, disease surveillance, disease control, simulation models, culling animals, dairy herd management, United States, The Netherlands.

Groenendaal, Huybert.  Epidemiologic and Economic Risk Analysis of Johne's Disease Control. [Wageningen: s.n., 2005?]; 160 p., ill.  ISBN: 9085042135.  Note:  Doctoral dissertation, Wageningen Universiteit.  In English with a Dutch summary.
NAL Call No.:  DISS F2005041
Descriptors:  Mycobacterium avium subsp. paratuberculosis, epidemiology, risk analysis, economic factors, disease control methods, The Netherlands.

Harwood, D.  My goat's got diarrhoea: common causes and disease management.  Veterinary Times.  2005; 35(41): 20-21.  ISSN:  1352-9374.
Descriptors:  goats, kids, diarrhea, cause, disease management and control, fluids, acidosis, mineral deficiencies and therapy, poisonings, common pathogens, etiology, diagnosis, fascioliasis, parasitoses, salmonellosis, sulfonamides, Clostridium perfringens, Cryptosporidium parvum, Eimeria christenseni, Eimeria ninakohlyakimovae, Escherichia coli, Fasciola, Mycobacterium avium subsp. paratuberculosis, Salmonella, Trichostrongylus, Secernentea, Strongylida, treatments, anthelmintics, antibiotics, sulfonamides, United Kingdom.

Hendrick, Steven H.; Kelton, David F.; Leslie, Ken E.; Lissemore, Kerry D.; Archambault, Marie; Duffield, Todd F.  Effect of paratuberculosis on culling, milk production, and milk quality in dairy herds.  Journal of the American Veterinary Medical Association.  2005; 227(8): 1302-1308.  ISSN:  0003-1488.  
URL:  http://www.avma.org/
NAL Call No.:  41.8 AM3
Descriptors:  Mycobacterium avium subsp. paratuberculosis, dairy cattle, 9 infected dairy herds, disease effects, culling, milk production, milk quality, fecal sampling, mycobacterial culture, serum sampling, ELISA testing, mixed effect and proportional hazards models, disease effects on: 305-day milk levels, fat, protein production, somatic cell count linear score, potential cow longevity. 

Holstad, G.; Sigurdardottir, O.G.; Storset, A.K.; Tharaldsen, J.; Nyberg, O.; Schonheit, J.; Djonne, B.  Description of the infection status in a Norwegian cattle herd naturally infected by Mycobacterium avium subsp. paratuberculosis.  Acta Veterinaria Scandinavica.  2005; 46(1/2): 45-56.  ISSN:  0044-605X.  Note:  In English with a Danish summary.
NAL Call No.:  41.8 AC87
Descriptors:  dairy cattle, goats, Mycobacterium avium subsp. paratuberculosis, age differences, serological survey, diagnosis, diagnostic techniques, antibodies, antibody testing, histopathology, immunoassay, immunodiagnosis, interferon, paratuberculosis, RFLP, restriction fragment length polymorphism, disease prevalence, disease surveys, epidemiological surveys, epidemiology seroprevalence, surveillance and control program, Norway.

Hostetter,J.; Huffman, E.; Byl, K.; Steadham, E.  Inducible nitric oxide synthase immunoreactivity in the granulomatous intestinal lesions of naturally occurring bovine Johne's disease.  Veterinary Pathology.  2005; 42(3): 241-249.  ISSN: 0300-9858.
URL:  http://www.vetpathology.org/contents-by-date.0.shtml
NAL Call No.:  41.8 P27
Abstract:  Inducible nitric oxide synthase (iNOS) is important in the control of a number of intracellular pathogens, including mycobacteria, and is a marker of classic macrophage activation.  In human granulomatous diseases such as leprosy, a spectrum of granulomatous lesions is described, ranging from the tuberculoid to lepromatous types.  Tuberculoid granulomas are associated with enhanced iNOS production and improved clinical outcomes over the lepromatous types.  The aim of this study is to determine whether an association exists between morphology of bovine Johne's disease granulomas and lesion macrophage effector functions.  To accomplish this, we retrospectively evaluated 24 cases of bovine Johne's disease.  In each case, we recorded the predominant granuloma morphology and evaluated iNOS immunoreactivity and bacterial burden by acid-fast stains and mycobacterial immunolabeling.  The results of this study demonstrate that all cases had granulomas with features most similar to the lepromatous type. This morphology correlated with heavy bacterial burdens demonstrated by acid-fast staining and mycobacterial immunoreactivity.  None of the cases had high expression of iNOS in mycobacterial-positive granulomas.  When iNOS immunoreactivity was identified, it was usually located near the crypts and was distinct from the granulomatous foci.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, iNOS, morphology of bovine Johne's disease granulomas, lesion macrophage effector functions, granuloma morphology, acid-fast stains, mycobacterial immunolabeling, crypts.

Hostetter, Jesse Michael; Steadham, Edward.  Immune scrum opsonization effects on non-tuberculous mycobacterial interaction with macrophages.  FASEB Journal.  2005; 19(5, Suppl. S, Pt. 2): A1515. ISSN:  0892-6638.  Note:  Experimental Biology 2005 Meeting, 35th International Congress of Physiological Sciences, San Diego, CA, USA; March 31 -April 06, 2005.
URL:  http://www.fasebj.org/contents-by-date.0.shtml
NAL Call No.:  QH301.F3
Descriptors:  Mycobacterium avium subsp. paratuberculosis, antibody is opsonizing, may promote killing, independent of nitric oxide and phagosome acidification.

Hostetter, J.; Kagan, R.; Steadham, E.  Opsonization effects on Mycobacterium avium subsp. paratuberculosis-macrophage interactions.  Clinical and Diagnostic Laboratory Immunology. 2005; 12(6): 793-796.  ISSN:  1071-412X.
URL:  http://www.fasebj.org/contents-by-date.0.shtml
NAL Call No.:  RB46.5
Descriptors:  macrophages, ability to limit proliferation of bacteria, opsonized Mycobacterium avium subsp. paratuberculosis.

Hughes, M.S.; Ball, N.W.; McCarroll, J.; Erskine, M.; Taylor, M.J.; Pollock, J.M.; Skuce, R.A.; Neill, S.D.  Molecular analyses of mycobacteria other than the M-tuberculosis complex isolated from Northern Ireland cattle.  Veterinary Microbiology.  2005; 108(1-2): 101-112.  ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science/journal/03781135
NAL Call No.:  SF601.V44
Descriptors:  cattle, antigens, genes, bovine tuberculosis, Johne’s disease, diagnostic techniques, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium kansasii, Mycobacterium bovis, Mycobacterium malmoense, Mycobacterium bohemicum, Mycobacterium holsaticum, Mycobacterium nonchromogenicum, Mycobacterium palustre, Mycobacterium sp. IWGMT-90210, Mycobacterium sp. LIV-2129, Northern Ireland, United Kingdom.

Huntley, J.F.J.; Whitlock, R.H.; Bannantine, J.P.; Stabel, J.R.  Comparison of diagnostic detection methods for Mycobacterium avium subsp. paratuberculosis in North American Bison.  Veterinary Pathology.  2005; 42(1): 42-51.  ISSN: 0300-9858.
URL:  http://www.vetpathology.org/contents-by-date.0.shtml
NAL Call No.:  41.8 P27
Abstract:  Tissues and fecal material were collected from 14 North American Bison (Bison bison) that were suspected of having Johne's disease and analyzed for the presence of Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis).  Sections of ileum, ileal-cecal lymph node, and three sequential sections of jejunum with their associated mesenteric lymph nodes were taken from each animal.  Fecal culture indicated that 5 of 14 (35.7%) animals were infected, whereas cultures from tissues detected 12 of 14 (85.7%) animals as infected and 59 of 111 (53.2%) of the tissues as positive for M. paratuberculosis.  Polymerase chain reaction analysis identified infection in 14 of 14 (100%) animals and in 91 of 112 (81.2%) tissues.  In addition, tissues were processed for Ziehl-Neelsen acid-fast staining, auramine O/acridine orange fluorescent staining, and immunohistochemical staining. Ziehl-Neelsen and auramine O staining identified 7 of 14 (50%) and 5 of 14 (35.7%) animals as infected and 24 of 112 (21.4%) and 28 of 112 (25%) tissues as positive, respectively.  Immunohistochemical analyses of bison tissues, using antisera collected from rabbits immunized with four different preparations of M. paratuberculosis, identified a greater percentage of infected animals (ranging from 57 to 93%) and positive tissues (ranging from 28 to 46%).  Collectively, these data indicate that DNA-based detection of M. paratuberculosis was more sensitive than bacterial culture or staining, identified infection in all the bison, and detected the greatest number of positive tissues within each animal.
Descriptors:  North American Bison, possible Johne’s disease, tissue and fecal sampling, Mycobacterium avium subsp. paratuberculosis, ileum, ileal-cecal lymph node, and three sequential sections of jejunum & associated mesenteric lymph nodes, fecal culture, PCR analysis, Ziehl-Neelsen acid-fast staining, auramine O/acridine orange fluorescent staining, and immunohistochemical staining, sensitivity of various detection methods.

Huntley, J.F.; Stabel, J.R.; Paustian, M.L.; Reinhardt, T.A.; Bannantine, J.P.  Expression library immunization confers protection against Mycobacterium avium subsp. paratuberculosis infection.  Infection and Immunity.  2005; 73(10): 6877-6884.  ISSN:  0019-9567.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=87
NAL Call No.:  QR1.I57
Descriptors:  expression library immunization, Mycobacterium avium subsp. paratuberculosis, DNA vaccines, mice immunization, gene gun delivery, live virulent strain challenge, 26 antigens seem to generate protection.

Huntley, Jason F.J.; Stabel, Judith R.; Bannantine, John P.  Immunoreactivity of the Mycobacterium avium subsp. paratuberculosis 19-kDa lipoprotein.  BMC Microbiology.  2005; 5(January 21).  ISSN:  1471-2180.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=44
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, gene encoding 19-kDa lipoprotein, immunomodulator, Johne’s disease, MAP0261, IFN gamma production measured in infected cows, sera testing, not sensitive enough for an assay.

Ikiz, Serkan; Bagcigil, A. Funda; Ak, Seyyal; Ozgur, N. Yakut; Lgaz, Atilla.  Paratuberculosis in cattle in Turkey detected by PCR.  Medycyna Weterynaryjna.  2005; 61(8): 881-883.  ISSN:  0025-8628.
NAL Call No.:  41.8 M463
Descriptors:  cattle, adult animals, fecal sampling, Mycobacterium avium subsp. paratuberculosis, PCR, IS900 gene, results negative, recommended further studies, Trakya, Turkey.

Jansen, J.; Godkin, A.  Raising Johne's-free calves.  Advances in Dairy Technology.  Proceedings of the Western Canadian Dairy Seminar.  2005; 17: 217-225.  ISSN: 1184-0684.  Note:  Seminar held March 8-11, 2005, Red Deer, Alberta.
URL:  http://www.wcds.afns.ualberta.ca/
NAL Call No.:  SF223.W478
Descriptors:  paratuberculosis, Johne’s disease prevention, Mycobacterium avium subsp. paratuberculosis, disease transmission, dairy herd management, cattle manure management.  

Juan, L. de ; Mateos, A.; Dominguez, L.; Sharp, J.M.; Stevenson, K.  Genetic diversity of Mycobacterium avium subspecies paratuberculosis isolates from goats detected by pulsed-field gel electrophoresis.  Veterinary Microbiology.  2005; 106(3-4): 249-257.  ISSN:  0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  goats, sheep, diagnosis, Mycobacterium avium subsp. paratuberculosis, 44 clinical isolates characterized, epidemiology, diagnostic techniques, genetic diversity, genotypes, PCR, pulsed field electrophoresis, RFLP.

Jubb, T.F.  The effect of interpreting an ELISA at a lower cut-off on detection of clinical cases of bovine Johne's disease.  Australian Veterinary Journal.  2005; 83(5): 305-307.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  Johne’s disease, Mycobacterium avium subsp. paratuberculosis, diagnosis, ELISA testing, positive results interpretation.

Judge, Johanna; Kyriazakis, Ilias; Greig, Alastair; Allcroft, David J.; Hutchings, Michael R. Clustering of Mycobacterium avium subsp. paratuberculosis in rabbits and the environment: How hot is a hot spot.  Applied and Environmental Microbiology.  2005; 71(10): 6033-6038.  ISSN: 0099-2240.
URL:  http://aem.asm.org/contents-by-date.0.shtml
NAL Call No.:  448.3 AP5
Abstract:  Clustering of pathogens in the environment leads to hot spots of diseases at local, regional, national, and international levels.  Scotland contains regional hot spots of Johne's disease (caused by Mycobacterium avium subsp. paratuberculosis) in rabbits, and there is increasing evidence of a link between paratuberculosis infections in rabbits and cattle.  The spatial and temporal dynamics of paratuberculosis in rabbits within a hot spot region were studied with the overall aim of determining environmental patterns of infection and thus the risk of interspecies transmission to livestock.  The specific aims were to determine if prevalence of paratuberculosis in rabbits varies temporally between seasons and whether the heterogeneous spatial environmental distribution of M. avium subsp. paratuberculosis on a large scale (i.e., regional hot spots) is replicated at finer resolutions within a hot spot.  The overall prevalence of M. avium subsp. paratuberculosis in rabbits was 39.7%; the temporal distribution of infection in rabbits followed a cyclical pattern, with a peak in spring of 55.4% and a low in summer of 19.4%.  Spatially, M. avium subsp. paratuberculosis-infected rabbits and, thus, the risk of interspecies transmission were highly clustered in the environment.  However, this is mostly due to the clustered distribution of rabbits.  The patterns of M. avium subsp. paratuberculosis infection in rabbits are discussed in relation to the host's socioecology and risk to livestock.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, cattle, epidemiology, rabbits are a reservoirs, spatial and temporal dynamics, environmental patterns of infection, seasonal effects, spatial distribution of pathogen, Johne’s disease, disease transmission, disease prevalence, seasonal variation, risk to livestock, Scotland.  

Judge, J.; Greig, A.; Kyriazakis, I.; Hutchings, M.R.  Ingestion of faeces by grazing herbivores - risk of inter-species disease transmission.  Agriculture, Ecosystems and Environment.  2005; 107(2/3): 267-274.  ISSN:  0167-8809.
URL:   http://www.sciencedirect.com/science/journal/01678809
NAL Call No.:  S601.A34
Descriptors:  cattle, sheep, rabbits, contaminated rabbit droppings, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, contaminated pastures, disease transmission via ingestion of feces while grazing, risks to herbivores, grazing study, no avoidance of droppings, plant-height affects levels of ingestion of rabbit droppings, United Kingdom.

Juste, R.A.; Garrido, J.M.; Geijo, M.; Elguezabal, N.; Aduriz, G.; Atxaerandio, R.; Sevilla, I.  Comparison of blood polymerase chain reaction and enzyme-linked immunosorbent assay for detection of Mycobacterium avium subsp. paratuberculosis infection in cattle and sheep.  Journal of Veterinary Diagnostic Investigation.  2005; 17(4): 354-359.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  cattle, cows, heifers, sheep, ewes, lambs, Mycobacterium avium subsp. paratuberculosis infection, Johne’s disease, diagnosis, diagnostic techniques, ELISA assay, PCR, blood test comparison, test accuracy.

Kiehnbaum, L.A.; Amonsin, A.; Wells, S.J.; Kapur, V.  Amplified fragment length polymorphism to detect clonal diversity and distribution of Mycobacterium avium subspecies paratuberculosis in selected Minnesota dairy cattle.  Journal of Veterinary Diagnostic Investigation.  July 2005; 17(4): 311-315.  ISSN: 1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  dairy cattle, Mycobacterium avium subsp. paratuberculosis, bacterial clones, genetic diversity, amplified fragment length, polymorphism, methods, Minnesota.

Koo, HyeCheong; Park,YongHo; Ahn, JongSam; Waters, W.R.; Palmer, M.V.; Hamilton, M.J.; Barrington, G; Mosaad, A.A.; Park, KunTaek; Jung,WooKyung; Hwang, InYeong; Cho, SangNae; Shin, S.J.; Davis, W.C.  Use of rMPB70 protein and ESAT-6 peptide as antigens for comparison of the enzyme-linked immunosorbent, immunochromatographic, and latex bead agglutination assays for serodiagnosis of bovine tuberculosis.  Journal of Clinical Microbiology.  2005; 43(9): 4498-4506.  ISSN:  0095-1137.
Descriptors:  cattle, deer, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium, Mycobacterium bovis early secretory antigenic target 6 (ESAT6-p) and a recombinant major secreted immunogenic protein (rMPB70), recombinant major secreted immunogenic protein (rMPB70) of Mycobacterium bovis, assays, diagnostic techniques, ELISA, immunodiagnosis, mycobacterial diseases, tuberculosis.

Kudahl, A.B.  Economic consequences of paratuberculosis control in dairy cattle herds.  DIAS Report, Animal Husbandry.  2005; (63): 127 p.  ISSN:  1397-9892.  Note:  A thesis from the Danish Institute of Agricultural Sciences in Tjele, Denmark. 
URL:  http://www.digisource.dk/
Descriptors:  dairy cattle, dairy herds, paratuberculosis, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, economics impact of disease, different control strategies, simulation model, herd specific decision support for dairy farmers.

Lagunas Solar, M.C.; Cullor, J.S.; Zeng, N.X.; Truong, T.D.; Essert, T K; Smith, W.L.; Pina, C..  Disinfection of dairy and animal farm wastewater with radiofrequency power.  Journal of Dairy Science.  2005; 88(11): 4120-4131.  ISSN:  0022-0302.  
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Descriptors:  dairy operations, livestock facilities, waste water decontamination, radiofrequency power technology, thermal disinfection, experimental inoculated, pathogens monitored, Salmonella sp., Escherichia coli O157: H7, and Mycobacterium avium subsp. paratuberculosis, alternative methodology, California.

Langelaar, Merel F.M.; Weber, Corinna N.; Overdijk, Marije B.; Mueller, Kerstin E.; Koets, Ad P.; Rutten, Victor P.M.G.  Cytokine gene expression profiles of bovine dendritic cells after interaction with Mycobacterium avium ssp paratuberculosis (M.a.p.), Escherichia coli (E coli) or recombinant M.a.p. heat shock protein 70.  Veterinary Immunology and Immunopathology.  2005; 107(1-2): 153-161.  ISSN:  0165-2427.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776
NAL Call No.:  SF757.2.V38
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Escherichia coli, recombinant heat shock protein 70 (M.a.p.) cytokine gene expression, bovine dendritic cells, bovine IL-12 gene, bovine interleukin-12 gene, expression, bovine IL-1 beta gene, interleukin-1 beta gene, expression, bovine IL-6 gene expression.

Langelaar, M.F.M.; Hope, J.C.; Rutten, V.P.M.G.; Noordhuizen, J.P.T.M.; Van Eden, W.; Koets, A.P.  Mycobacterium avium ssp paratuberculosis recombinant heat shock protein 70 interaction with different bovine antigen-presenting cells.  Scandinavian Journal of Immunology.  2005; 61(3): 242-250.  ISSN:  0300-9475.  
URL: http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=sji
NAL Call No.:  QR180.53
Descriptors:  recombinant Hsp 70, Mycobacterium avium subsp. paratuberculosis, bovine peripheral blood mononuclear cells, CD14 (+), characterized monocyte-derived macrophages, monocyte derived dendritic cells (DC), BoMac, an immortalized bovine macrophage cell line.

Lei, Liying; Hostetter, Jesse M.  Effects of Mycobacteria avium subspecies paratuberculosis infection on bovine dendritic cell surface marker expression.  FASEB Journal.  2005; 19(4, Suppl. S, Pt. 1): A965.  ISSN:  0892-6638.  Note:  Experimental Biology 2005 Meeting, 35th International Congress of Physiological Sciences, San Diego, CA, USA; March 31 -April 06, 2005.
URL:  http://www.fasebj.org/contents-by-date.0.shtml
NAL Call No.:  QH301.F3
Descriptors:  Mycobacterium avium subsp. paratuberculosis, infected bovine CD14(+) monocytes, cultured for dendritic cell differentiation in vivo, host immune response, down-regulation of MHCII expression on DCs.

Leine, N.  Smittesaneringsprosjektet "Friskere geiter".  [Disease eradication project "Healthier goats.”]  Norsk Veterinaertidsskrift.  2005; 117(5): 360-362.  ISSN:  0332-5741.  Note:  In Norweigian.
Descriptors:  goats, goat diseases, preventive medicine, Mycobacterium avium subsp. paratuberculosis, Corynebacterium pseudotuberculosis, caprine arthritis encephalitis, Norway.

Li, Lingling; Bannantine, John P.; Zhang, Qing; Amonsin, Alongkorn; May, Barbara J.; Alt, David; Banerji, Nilanjana; Kanjilal, Sagarika; Kapur, Vivek.  The complete genome sequence of Mycobacterium avium subspecies paratuberculosis.  Proceedings of the National Academy of Sciences of the United States of America.  2005; 102(35): 12344-12349.  ISSN:  0027-8424.  
URL:  http://www.pnas.org/contents-by-date.0.shtml
NAL Call No.:  500 N21P
Descriptors:  Mycobacterium avium subsp. paratuberculosis, strain K-10, pathogenic strain of Johne’s, cattle, ruminants, sequence data, description of the genome, comparison with Mtb.

Lindstedt, Bjorn Arne.  Multiple-locus variable number tandem repeats analysis for genetic fingerprinting of pathogenic bacteria.  Electrophoresis.  2005; 26(13): 2567-2582.  ISSN:  0173-0835. 
Descriptors:  DNA fingerprinting, identifying, tracing, preventing dissemination, pathogenic bacteria, review article, VNTRs, MLVA, advantages and disadvantages, many species listed including Mycobacterium tuberculosis, Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis.  

Lombard, Jason E.; Garry, Franklyn B.; McCluskey, Brian J.; Wagner, Bruce A.  Risk of removal and effects on milk production associated with paratuberculosis status in dairy cows.  Journal of the American Veterinary Medical Association.  2005; 227(12): 1975-1981.  ISSN:  0003-1488.
URL:  http://www.avma.org/
NAL Call No.:  41.8 AM3
Descriptors:  dairy cows, Mycobacterium avium subsp. paratuberculosis, National Animal Health Monitoring System Dairy 2002, serum evaluation, ELISA for antibodies, Dairy Herd Improvement Association records, current and historical lactation data, premature removal, culling data, reduced milk production, strong positives for Johne’s, milk composition seemed unchanged, economic impacts.

Losinger, W.C.  Economic impact of reduced milk production associated with Johne's disease on dairy operations in the USA.  Journal of Dairy Research.  2005; 72(4): 425-432.  ISSN:  0022-0299.
URL:  http://journals.cambridge.org/action/displayJournal?jid=DAR&bVolume=y
NAL Call No.:  44.8 J823
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, dairy cattle, reduced milk production, economic impact, United States. 

Machackova-Kopecna, M.; Bartos, M.; Straka, M.; Ludvik, V.; Svastova, P.; Alvarez, J.; Lamka, J.; Trcka, I.; Treml, F.; Parmova, I.; Pavlik, I.  Paratuberculosis and avian tuberculosis infections in one red deer farm studied by IS900 and IS901 RFLP analysis.  Veterinary Microbiology.  2005; 105(3-4): 261-268.  ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  red deer farm herd, Cervus elaphus, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, animal slaughter, levels of infection of different Mycobacterium species, liver, lymph nodes, spleen, tuberculosis, Johne’s disease, mixed infections, paratuberculosis, RFLP,  restriction fragment length polymorphism.

Mackintosh, C.G.; Labes, R.E.; Griffin, J.F.T. The effect of Johne's vaccination on tuberculin testing in farmed red deer (Cervus elaphus).  New Zealand Veterinary Journal.  2005; 53(4): 216-222.  ISSN:  0048-0169.  
NAL Call No.:  41.8 N483
Descriptors:  farmed red deer, Cervus elaphus, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, vaccination, oil adjuvanted versus aqueous formulation, live attenuated Mycobacterium paratuberculosis strain 316F, possible cross reaction with tuberculin testing, antibodies, cell mediated-immunity, humoral immunity, immune response, lymphocyte transformation.

Marsh, I.B.; Whittington, R.J.  Deletion of an mmpL gene and multiple associated genes from the genome of the S strain of Mycobacterium avium subsp. paratuberculosis identified by representational difference analysis and in silico analysis.  Molecular and Cellular Probes. 2005; 19(6): 371-384.  ISSN:  0890-8508.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6959&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=a1d954773ca83f03ff7b5c0d870580ef
NAL Call No.:  RB43.7.M63
Descriptors:  Mycobacterium avium subsp. paratuberculosis, cattle (C) and sheep (S) strains, strain differences, unique genetic differences, DNA deletions, loss of mmpL5 and mrnpS5 genes, homologues of M. tuberculosis genes, Rv2002 (fabG3), Rv2017c (lipW), Rv3132c (devS), Rv2032 (acg), conserved hypothetical genes Rv2005c and Rv2026c.

McDonald, Wendy L.; O'Riley, Kimberly J.; Schroen, Christopher J; Condron, Robin J.  Heat inactivation of Mycobacterium avium subsp. paratuberculosis in milk.  Applied and Environmental Microbiology.  2005; 71(4): 1785-1789.  ISSN:  0099-2240.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=83
NAL Call No.:  448.3 AP5
Descriptors: Mycobacterium avium subsp. paratuberculosis, raw milk, heat treatment, effective pasteurization, 3 temperature levels, 3 time levels, industrial pasteurizer, equipment size and flow rates, spiked raw milk, all experimental time and temperature levels were effective.

McKenna, S.L.B.; Keefe, G.P.; Barkema, H.W.; Sockett, D.C.  Evaluation of three ELISAs for Mycobacterium avium subsp. paratuberculosis using tissue and fecal culture as comparison standards.  Veterinary Microbiology.  2005; 110(1-2): 105-111.  ISSN:  0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  Mycobacterium avium subsp. paratuberculosis, ELISA, antibody detection sensitivity, post mortem tissue and fecal sampling, dairy cattle, non-absorbed indirect assay, absorbed indirect assays, comparison study.

McKenna, S.L.B.; Sockett, D.C.; Keefe, G.P.; McClure, J.; Van Leeuwen, J.A.; Barkema, H.W.  Comparison of two enzyme-linked immunosorbent assays for diagnosis of Mycobacterium avium subsp. paratuberculosis.  Journal of Veterinary Diagnostic Investigation.  2005; 17(5): 463-466. ISSN:  1040-6387
URL:  http://jvdi.org/cgi/reprint/17/5/463?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&author1=McKenna,+S&searchid=1&FIRSTINDEX=0&sortspec=relevance&resourcetype=HWCIT
NAL Call No.:  SF774.J68
Descriptors:  383 dairy cows, 8 herds, Johne’s disease, sera and fecal testing, Mycobacterium avium subsp. paratuberculosis, bacterial antigens, protoplasmic antigen, lipoarabinomannan-based antigen, diagnosis, diagnostic techniques, absorbed ELISA was best, non-absorbed ELISA, specificity, sensitivity, immunodiagnosis, paratuberculosis, Wisconsin, United States.

Motiwala, Alifiya S.; Strother, Megan; Theus, Natalie E.; Stich, Roger W.; Byrum, Beverly; Shulaw, William P.; Kapur, Vivek; Sreevatsan, Srinand.  Rapid detection and typing of strains of Mycobacterium avium subsp. paratuberculosis from broth cultures.  Journal of Clinical Microbiology.  2005; 43(5): 2111-2117.  ISSN: 0095-1137.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=81
NAL Call No.:  QR46.J6
Abstract:  A liquid culture followed by molecular confirmation was evaluated for potential to improve sensitivity and reduce time to diagnosis of Mycobacterium avium subsp. paratuberculosis infection.  Fecal samples from 240 animals from Ohio farms were assessed for presence of M. avium subsp. paratuberculosis using four different protocols: (i) sedimentation processing followed by inoculation on Herrold's Egg Yolk media (HEYM) slants (monitored biweekly up to 16 weeks), (ii) double centrifugation processing followed by inoculation on HEYM slants (monitored biweekly up to 16 weeks), (iii) liquid-solid double culture method using modified 7H9 broth (8 weeks) followed by subculture on HEYM slants (monitored up to 8 weeks), and (iv) liquid culture using modified 7H9 broth (8 weeks) followed by molecular assays for the presence of two M. avium subsp. paratuberculosis-specific targets.  The number of positive samples detected by each protocol was 37, 53, 65, and 76, respectively.  Twenty-seven samples were positive by all four methods. Based on samples positive by at least one method (n = 81), the sensitivities for sedimentation processing, double centrifugation processing, liquid-solid double culture, and liquid culture followed by molecular confirmation were 46%, 65%, 80%, and 94%, respectively.  Fingerprinting of the positive samples using two polymorphic (G and GGT) short sequence repeat regions identified varying levels of within-farm and between-farm diversity.  Our data indicate that liquid culture followed by molecular confirmation can significantly improve sensitivity and reduce time-to-diagnosis (from 16 to 8 weeks) of M. avium subsp. paratuberculosis infection and can also be efficiently employed for the systematic differentiation of M. avium subsp. paratuberculosis strains to understand the epidemiology of Johne's disease.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, diagnostic methods, strain typing, fingerprinting, polymorphic G and GGT short sequence repeat regions, fecal samples, liquid cultures, molecular confirmation, sensitivity of diagnostic testing, 4 testing protocols, potential in epidemiological studies, Ohio, United States.

Munjal, S.K.; Tripathi, B.N.; Paliwal, O.P.  Progressive immunopathological changes during early stages of experimental infection of goats with Mycobacterium avium subspecies paratuberculosis.  Veterinary Pathology.  2005; 42(4):427-436.  ISSN: 0300-9858.
URL:  http://www.vetpathology.org/contents-by-date.0.shtml
NAL Call No.:  41.8 P27
Abstract:  A dose of 1010 Mycobacterium avium subspecies paratuberculosis was administered orally on seven occasions to produce experimental paratuberculosis infection in 10 5-8-week-old goat kids.  Bacteriological, immunological, and histopathological changes, their relationships, and the efficacy of the commonly used diagnostic methods were studied during the progressive disease up to 270 days postinfection (DPI).  Significant lymphocyte proliferative responses in the peripheral blood of five goats were detected as early as 60 DPI.  A lymphoproliferative test was also performed on lymphocytes purified from different compartments of the guts of five infected and five control goats.  Significant proliferative responses were observed in lymphocytes of jejunal compartments of all five goats, of which four had also significant lymphocyte proliferation in the blood.  The ileal lymphocytes from two goats, one each at 120 and 270 DPI, had significant proliferation.  The histological lesions were mainly observed in the gut-associated lymphoid tissues of the ileocecal valve, the ileum, and the terminal jejunum.  Acid-fast bacilli were demonstrated in the lesions of two goats at 60 and 210 DPI.  Bacterial culture showed poor sensitivity, detecting positive results for only one goat in the fecal and tissue samples at 210 DPI, whereas polymerase chain reaction (PCR) detected one goat in fecal sample at 210 DPI and two goats in tissue samples at 60 and 210 DPIs, respectively.  Enzyme-linked immunosorbent assay and agar gel immunodiffusion test were found to be 100% sensitive from 180 and 210 DPI onwards, respectively.
Descriptors:  young goat kids, Mycobacterium avium subsp. paratuberculosis, oral administration, experimental infection, bacteriological, immunological, and histopathological changes, lymphocyte proliferative testing, gut, blood, fecal and tissue sampling, ELISA assay, agar gel immunodiffusion test.

Nagata, Reiko; Muneta, Yoshihiro; Yoshihara, Kazuhiro; Yokomizo, Yuichi; Mori, Yasuyuki.  Expression cloning of gamma interferon-inducing antigens of Mycobacterium avium subsp. paratuberculosis.  Infection and Immunity.  2005; 73(6): 3778-3782.  ISSN:  0019-9567.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=87
NAL Call No.:  QR1.I57
Descriptors:  Mycobacterium avium subsp. paratuberculosis, peripheral blood mononuclear cells of infected cattle, recombinant proteins, Map10, Map39, and Map41, gamma interferon production, peripheral blood mononuclear cells of infected cattle.

National Animal Health Monitoring System (U.S.).  Dairy 2002: Johne's Disease on U.S. Dairy Operations, 2002.  U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services, National Animal Health Monitoring System.  Fort Collins, Colorado.  [2005]; vi, 170 p., ill.  Note:  Other title:  Johne's Disease on U.S. Dairy Operations, 2002.
NAL Call No.:  SF967.P33 D35 2005
Descriptors:  paratuberculosis, Mycobacterium avium subsp. paratuberculosis, dairy cattle, disease incidence, survey, cattle diseases, United States.

Olsen, Ingrid; Boysen, Preben; Kulberg, Siri; Hope, Jayne C.; Jungersen, Gregers; Storset, Anne K.  Bovine NK cells can produce gamma interferon in response to the secreted mycobacterial proteins ESAT-6 and MPP14 but not in response to MPB70.  Infection and Immunity.  2005; 73(9): 5628-5635.  ISSN:  0019-9567.  
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=87
NAL Call No.:  QR1.I57
Descriptors:  IFN-gamma of NK cells, antigen presenting cell, secreted mycobacterial proteins, Mycobacterium avium subsp. paratuberculosis, ESAT-6, MPP14, Mycobacterium tuberculosis, PPD, interleukin 12, young cattle response.

Palmer, Mitchell V.; Stoffregen, William C.; Carpenter, Jeremy G.; Stabel, Judith R.  Isolation of Mycobacterium avium subsp. paratuberculosis (Map) from feral cats on a dairy farm with MAP-infected cattle.  Journal of Wildlife Diseases.  2005; 41(3): 629-635.  ISSN:  0090-3558.  
URL:  http://www.jwildlifedis.org/
NAL Call No.:  41.9 W64B
Descriptors:  dairy cattle, Mycobacterium avium subsp. paratuberculosis, possible non-cattle disease reservoirs, feral cats, mice, opossums, mesenteric lymph node, ileum sampling, interspecies transmission, ingestion of infected feces, infected prey, Mid Western dairy farm, United States.

Paustian, Michael L.; Kapur, Vivek; Bannantine, John P.  Comparative genomic hybridizations reveal genetic regions within the Mycobacterium avium complex that are divergent from Mycobacterium avium subsp. paratuberculosis isolates.  Journal of Bacteriology.  2005; 187(7): 2406-2415.  ISSN:  0021-9193.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=88
NAL Call No.:  448.3 J82
Descriptors:  comparative genomic study, coding sequence, genomic DNA, open reading frame, Mycobacterium avium subsp. paratuberculosis, whole genome microarray, Mycobacterium avium subsp. silvaticum, Mycobacterium avium subsp. avium, Mycobacterium intracellulare, Mycobacterium smegmatis, differentiation with multiple clusters of divergent ORFs.

Pavlas, M.  New findings of pathogenesis, diagnostics and control of paratuberculosis in cattle.  Acta Veterinaria Brno.  2005; 74(1): 73-79.  ISSN:  0001-7213. NAL Call No.:  SF604.B7
Descriptors:  3620 cattle, 18 farms, Mycobacterium avium subsp. paratuberculosis, bacteriology, diagnosis, diagnostic techniques, paratuberculosis, pathogenesis, separation bacterioscopic method, fecal sampling, young animals, PCR IS900.

Peddie, S.; Stott, A.; Oglethorpe, D.; Gunn, G.  Communicating food-safety risks to key stakeholders.  Eurochoices.  2005; 4(2): 42-49.  ISSN:  1478-0917.  Note:  In English with summaries in German and French.  
Descriptors:  cattle, cattle disease, Johne’s disease as a case studies, communication about food safety, information regarding risk and uncertainty, Mycobacterium avium subsp. paratuberculosis, risk management, Codex Alimentarius.

Pickup, R.W.; Rhodes, G.; Arnott, S; Sidi Boumedine, K.; Bull, T.J.; Weightman, A.; Hurley, M.; Hermon-Taylor, J.  Mycobacterium avium subsp. paratuberculosis in the catchment area and water of the river Taff in South Wales, United Kingdom, an its potential relationship to clustering of Crohn's disease cases in the city of Cardiff.  Applied and Environmental Microbiology.  2005; 71(4): 2130-2139.  ISSN:  0099-2240.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=83
NAL Call No.:  448.3 AP5
Descriptors:  pastures, livestock grazing, pasture runoff, bacterial pathogen, Mycobacterium avium subsp. paratuberculosis, bovine strains, water pollution, Taff River, river water sampling, 32% of samples IS900 PCR positive, river aerosols, reservoirs, zoonotic potential, Crohn's disease levels in local humans, epidemiology, human diseases, Cardiff, Wales.

Raizman, E.A.; Wells, S.J.; Jordan, P.A.; DelGiudice, G.D.; Bey, R.R.  Mycobacterium avium subsp. paratuberculosis from free-ranging deer and rabbits surrounding Minnesota dairy herds.  Canadian Journal of Veterinary Research.  2005; 69(1): 32-38.  ISSN:  0830-9000.  Note:  In English with a French summary.  
URL:   http://canadianveterinarians.net/publications-journal-issue.aspx
NAL Call No.:  SF601.C24
Descriptors:  dairy cows, 108 dairy herds surveyed, fecal sampling and culture, dairy farm management practices, wild animals, disease reservoir for Mycobacterium avium subsp. paratuberculosis, estimates of disease prevalence in deer and rabbits, production practices effecting disease transmission, pasture, dry lot use, manure spreading on crop fields, disease vectors, Minnesota, United States.

Rajeev, Sreekumari; Zhang, Yan; Sreevatsan, Srinand; Motiwala, Alifiya S; Byrum, Beverly.  Evaluation of multiple genomic targets for identification and confirmation of Mycobacterium avium subsp. paratuberculosis isolates using real-time PCR.  Veterinary Microbiology.  2005; 105(3-4): 215-221.  ISSN:  0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  multiple genomic targets, Mycobacterium avium subsp. paratuberculosis, isolates, diagnostic techniques, DNA, genomes, identification, nucleotide sequences, real time PCR.

Rast, L.; Whittington, R.J.  Longitudinal study of the spread of ovine Johne's disease in a sheep flock in southeastern New South Wales.  Australian Veterinary Journal.  2005; 83(4) 227-232.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, epidemiology, disease spread, longitudinal study, New South Wales, Australia.

Ravva, Subbarao V.; Stanker, Larry H.  Real-time quantitative PCR detection of Mycobacterium avium subsp. paratuberculosis and differentiation from other mycobacteria using SYBR Green and TaqMan assays.  Journal of Microbiological Methods.  2005; 63(3): 305-317.  ISSN:  0167-7012.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=4932&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=541315e5c987176039c95a3602129114
NAL Call No.:  QR65.J68
Descriptors:  Mycobacterium avium subsp. paratuberculosis, 2 detection methods, diagnostic methods, SYBR Green bound to PCR products, cleavage of a fluorogenic (TaqMan) probe, level of sensitivity, Mycobacterium avium subsp. paratuberculosis strain ATCC 19698, direct cell detection, other mycobacterium species not detected.

Reddacliff, L.A.; Beh, K.; McGregor, H.; Whittington, R.J.  A preliminary study of possible genetic influences on the susceptibility of sheep to Johne's disease.  Australian Veterinary Journal.  2005; 83(7): 435-441.  ISSN: 0005-0423.  
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, susceptibility to Johne’s disease, genetic aspects.

Ridge, S.E.; Baker, I.M.; Hannah, M.  Effect of compliance with recommended calf-rearing practices on control of bovine Johne's disease.  Australian Veterinary Journal.  Jan/Feb 2005; 83(1-2): 85-90.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  paratuberculosis, Mycobacterium avium subsp. paratuberculosis, disease control practices for calves, on the farm prevention, effects of compliance, Australia.

Rodriguez-Lazaro, David; D'Agostino, Martin; Herrewegh, Arnold; Pla, Maria; Cook, Nigel; Ikonomopoulos, John.  Real-time PCR-based methods for detection of Mycobacterium avium subsp. paratuberculosis in water and milk.  International Journal of Food Microbiology.  2005; 101(1): 93-104.  ISSN:  0168-1605.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5061&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=b5ac5281dbf42fb6f6dba9a0316091c5
NAL Call No.:  QR115.I57
Descriptors:  PCR assay, Mycobacterium avium subsp. paratuberculosis, 18 isolates, 17 other Mycobacteria strains, pathogen detection, milk contamination, drinking water contamination, drinking water, food contamination, methodology, detection levels of less than 3 genomic DNA copies, 12 cell detection.

Romano, M.I.; Amadio, A.; Bigi, F.; Klepp, L.; Etchechoury, I.; Noto-Llana, M.; Morsella, C.; Paolicchi, F.; Pavlik, I.; Bartos, M.  Further analysis of VNTR and MIRU in the genome of Mycobacterium avium complex, and application to molecular epidemiology of isolates from South America.  Veterinary Microbiology.  2005; 110 (3-4): 221-237.  ISSN: 0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  Mycobacterium avium complex, animal pathogenic bacteria, loci, genes, genome, epidemiology, minisatellite repeats, tandem repeat sequences, genetic markers, codons, nucleotide sequences, genetic variation, Mycobacterium avium subsp. paratuberculosis, bioinformatics, molecular epidemiology, Mycobacterial Interspersed Repetitive Units, Mycobacterium avium subsp. hominisuis, South America.

Roussel, A.J.; Libal, M.C.; Whitlock, R.L.; Hairgrove, T.B.; Barling, K.S.; Thompson, J.A.  Prevalence of and risk factors for paratuberculosis in purebred beef cattle.  Journal of the American Veterinary Medical Association.  2005; 226(5): 773-778.  ISSN:  0003-1488.  
URL:  http://www.avma.org/
NAL Call No.:  41.8 AM3
Descriptors:  4,579 purebred beef cattle, 115 beef ranches, testing for Mycobacterium avium subsp. paratuberculosis, Johne’s disease, serum antibody testing, commercial ELISA, culturing of feces from seropositive animals, disease prevalence, antibodies, risk factors, water source, dairy type nurse cows, previous clinical signs of Johne’s, species of cattle (Bos taurus vs Bos indicus), location, possible unexpected serologic results in herds, Texas, United States.

Salem, M.; Zeid, A.A.; Hassan, D.; El Sayed, A.; Zschoeck, M.  Studies on Johne's disease in Egyptian cattle.  Journal of Veterinary Medicine Series B.  2005; 52(3): 134-137.  ISSN:  0931-1793.  
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=jvb
NAL Call No.:  41.8 Z52
Descriptors:  160 Egyptian cows tested, 40 German cows tested, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, diagnosis, various diagnostic methods, microscopic examination, fecal culture, PCR, disease distribution, disease prevalence, disease surveys, epidemiological surveys, epidemiology, Egypt, Germany.

Salgado, M.; Manning, E.J.B.; Collins, M.T.  Performance of a Johne's disease enzyme-linked immunosorbent assay adapted for milk samples from goats.  Journal of Veterinary Diagnostic Investigation.  2005; 17(4): 350-354.  ISSN: 1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  Johne’s disease, Mycobacterium avium subsp. paratuberculosis, ELISA, goat’s milk samples.

Schleig, P.M.; Buergelt, C.D.; Davis, J.K.; Williams, E.; Monif, G.R.G.; Davidson, M.K.  Attachment of Mycobacterium avium subspecies paratuberculosis to bovine intestinal organ cultures: Method development and strain differences.  Veterinary Microbiology.  2005 July; 108(3-4): 271-279.  ISSN: 0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  bovine intestinal epithelial cells, organ cultures, bacterial attachment, bacterial strain differences, methods, attachment process method, radiolabelled Mycobacterium avium subsp. paratuberculosis strains, mucosal epithelium, goblet cells, effects of coating with fibronectin.

Semret, M.; Alexander, D.C.; Turenne, C.Y.; de Haas, P.; Overduin, P.;  Van Soolingen, D.; Cousins, D.; Behr, M.A.  Genomic polymorphisms for Mycobacterium avium subsp. paratuberculosis diagnostics.  Journal of Clinical Microbiology.  2005; 43(8): 3704-3712.  ISSN:  0095-1137.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=81
NAL Call No.:  QR46.J6
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, animal pathogen, potential zoonotic disease, differential diagnostic assays, comparative genomic approach, genomic differences, DNA microarray based assay, Mycobacterium avium subsp. avium strain 104, MAP K10, absence of LSPA8 was specific for Mycobacterium avium subsp. paratuberculosis.

Shin, Sung Jae; Chang, Chao Fu; Chang, Ching Dong; McDonough, Sean P.; Thompson, Belinda; Yoo, Han Sang; Chang, Yung Fu.  In vitro cellular immune responses to recombinant antigens of Mycobacterium avium subsp. paratuberculosis.  Infection and Immunity.  2005; 73(8): 5074-5085.  ISSN:  0019-9567.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=87
NAL Call No.:  QR1.I57
Descriptors:  Mycobacterium avium subsp. paratuberculosis, in vitro, recombinant antigens, Ags, 85A, 85B, 85C, superoxide dismutase [SOD], 35-kDa protein, ability to stimulate peripheral mononuclear ear cells, fecal culture, bacterial shedding cows, gamma interferon, IL-2, IL-12, TNF alpha, possibly important for vaccine production.

Sigurdardottir, Olof G.; Bakke-McKellep, Anne Marie; Djonne, Berit; Evensen, Oystein.  Mycobacterium avium subsp. paratuberculosis enters the small intestinal mucosa of goat kids in areas with and without Peyer's patches as demonstrated with the everted sleeve method.  Comparative Immunology Microbiology and Infectious Diseases.  2005; 28(3): 223-230.  ISSN:  0147-9571.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5003&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=d84c7d4df471489f36fcab6d30fb7920
NAL Call No.:  QR180.C62
Descriptors:  goats, young animals, kids, entry point, Mycobacterium avium subsp. paratuberculosis, small intestine, in vitro absorption, everted sleeve method, with and without Peyer’s patchers, M cells, enterocytes, jejunium.

Simutis, F.J.; Cheville, N.F.; Jones, D.E.  Investigation of antigen-specific T-cell responses and subcutaneous granuloma development during experimental sensitization of calves with Mycobacterium avium subsp. paratuberculosis.  American Journal of Veterinary Research.  2005; 66(3): 474-482.  ISSN: 0002-9645.
URL:  http://avmajournals.avma.org/loi/ajvr?cookieSet=1
NAL Call No.:  41.8 AM3A
Descriptors:  calves, experimental infection and sensitization, Mycobacterium avium subsp. paratuberculosis, antigen specific T cell responses, granulomas.

Sivakumar, P.; Tripathi, B.N.; Singh, Nem.  Detection of Mycobacterium avium subsp. paratuberculosis in intestinal and lymph node tissues of water buffaloes (Bubalus bubalis) by PCR and bacterial culture.  Veterinary Microbiology.  2005; 108(3-4): 263-270.  ISSN:  0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  water buffalo, animal pathogen, intestines, differential diagnosis, genes, histopathology, lymph nodes, nucleotide sequences, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, PCR, polymerase chain reaction.

Stokka, G.L.; Lardy, G.P.  Health management programs: integrating biological and management principles in analysis, design, and implementation of programs for two-year-old beef cows.  Professional Animal Scientist.  2005; 21(3): 159-163.  ISSN:  1080-7446.
NAL Call No.:  SF51.P76
Descriptors:  beef cows, beef production, cattle diseases, productions costs, vaccination, disease control programs, immunity, leptospirosis, bovine diarrhea virus, Mycobacterium avium subsp. paratuberculosis, Neospora, Trichomonas, infectious bovine rhinotracheitis.

Storset, A.K.; Berg, I.; Djonne, B.  Evaluation of the gamma interferon test for diagnosis of paratuberculosis in goats.  Veterinary Immunology and Immunopathology.  2005; 107(1/2): 87-94.  ISSN:  0165-2427.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776
NAL Call No.:  SF757.2.V38
Descriptors:  goats, goat herd testing, vaccinated and unvaccinated herds, Mycobacterium avium subsp. paratuberculosis, diagnosis, diagnostic techniques, gamma interferon test, age differences, clinical aspects, immune response, paratuberculosis, vaccination. 

Stott, A.W.; Jones, G.M.; Humphry, R.W.; Gunn, G.J.  Financial incentive to control paratuberculosis (Johne's disease) on dairy farms in the United Kingdom.  Veterinary Record. 2005 June 25; 156(26): 825-831.  ISSN: 0042-4900.
URL:  http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  dairy cows, paratuberculosis, dairy farm management, disease control, costs and returns, dynamic programming, estimates of financial incentive for disease control, Mycobacterium avium subsp. paratuberculosis, milk prices, United Kingdom.

Stratmann, J.; Homuth, M.; Gerlach, G.F.  Uberlegungen zur Kontrolle und Bekampfung der Paratuberkulose in Milchviehbestanden.  [Considerations with respect to control and eradication of Johne's disease in dairy herds.]  DTW (Deutsche Tieraerztliche Wochenschrift). 2005; 112(8): 304-306.  ISSN:  0341-6593.  Note:  In German.
NAL Call No.:  41.8 D482
Descrptors:  dairy herds, Mycobacterium avium subsp. paratuberculosis, 5-15% infected, environmental reservoirs, non-ruminant animals, isolation of heavy shedding herds, potential disease control strategy, Germany.

Strickland, S.J.; Scott, H.M.; Libal, M.C.; Roussel, A.J.; Jordan, E.R.  Effects of seasonal climatic conditions on the diagnosis of Mycobacterium avium subspecies paratuberculosis in dairy cattle.  Journal of Dairy Science.  2005; 88(7): 2432-2440.  ISSN: 0022-0302.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Abstract:  Validity of Johne's disease programs and control protocols that rely on established cut points [e.g., specified sample-to-positive (S/P) ratios] for ELISA serological tests depends on interpreted results that are not susceptible to variable test accuracy.  It was hypothesized that seasonal variability exists in serological response to Mycobacterium avium subsp. paratuberculosis (MAP) infection.  Further, a reciprocal response may occur, resulting in greater risk of fecal shedding in subclinically infected animals.  A testing regimen was invoked that included multiple testing of individual adult cows during the 4 seasons.  Serum was collected on a cyclic, monthly basis from 3 randomly selected cohorts of dairy cows, and fecal samples were collected from the 20% of cows with the greatest ELISA test S/P ratios.  Staggered, quarterly sampling was continued for 1 yr, and at the conclusion, serum was analyzed en masse.  The ELISA outcome values (i.e., S/P ratio) were treated both as categorical and continuous variables.  The potential lagged effects of temperature-related seasonality on S/P ratio, as well as the potential for a change in test result caused by temperature were assessed.  Results for fecal culture were analyzed on a categorical scale and compared with the ELISA results to explore the possibility of reciprocal fecal shedding. No significant seasonal effects on either S/P ratios or the proportion of cows seropositive to MAP were observed.  Furthermore, no evidence was found linking temperature-related seasonality to a reciprocal increase in the risk of fecal culture positivity for MAP.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, control protocols, diagnostic variations, no seasonal variations, multiple testing during all 4 seasons, serum testing, fecal testing, ELISA test S/P ratios, temperature effects.

Suanes, A.; Nunez, A.; Piaggio, J.; de Freitas, J.; Zaffaroni, R.; Gil, A.  Evaluation of diagnostic tests for the early detection of Johne's disease in a dairy herd in Uruguay.  Krynski, A.; Wrzesien, R. [Editors].  Animals and Environment.  Volume 1: Proceedings of the XIIth ISAH Congress on Animal Hygiene, Warsaw, Poland, 4-8 September 2005.  BEL Studio sp. z.o.o. of Warsaw, Poland.  2005; 205-208.  ISBN:  8389968312.  
Descriptors:  dairy cattle, Mycobacterium avium subsp. paratuberculosis, interferon, antibodies, antigens, diagnosis, diagnostic techniques, ELISA, paratuberculosis, skin tests, tuberculin.

Szteyn, J.; Wiszniewska, A.; Fus-Szewczyk, M.M.  Przeciwciaa swoiste dla Mycobacterium avium subsp. paratuberculosis u byda mlecznego ponocno-wschodniej Polski.  [Antibodies specific to Mycobacterium avium subsp. paratuberculosis in dairy cows in northeast Poland.] Medycyna Weterynaryjna.  2005; 61(8): 884-886.  ISSN:  0025-8628.  Note:  In Polish with an English summary.  
NAL Call No.:  41.8 M463
Descriptors:  dairy cattle, 495 samples, 20 preselected herds, seroprevalence, antibody testing for Mycobacterium avium subsp. paratuberculosis, IDEXX and ELISA kit, recommend a control program, Poland.

Tasara, T.; Hoelzle, L.E.; Stephan, R.  Development and evaluation of a Mycobacterium avium subspecies paratuberculosis (MAP) specific multiplex PCR assay.  International Journal of Food Microbiology.  2005; 104(3): 279-287.  ISSN:  0168-1605.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5061&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=b5ac5281dbf42fb6f6dba9a0316091c5
NAL Call No.:  QR115.I57
Descriptors:  Mycobacterium avium subsp. paratuberculosis,16S-rRNA gene; detection assays, PCR, co-amplifies 16S rRNA gene, MAP IS900 and f57 sequences, specificity, false positive IS900 PCR signals in Mycobacterium chelonae, Mycobacterium terrae, Mvcobacterium xenopi.

Tasara, T.; Stephan, R.  Development of an F57 sequence-based real-time PCR assay for detection of Mycobacterium avium subsp. paratuberculosis in milk.  Applied and Environmental Microbiology.  2005; 71(10):5957-5968.  ISSN: 0099-2240.
URL:  http://aem.asm.org/contents-by-date.0.shtml
NAL Call No.:  448.3 AP5
Abstract:  A light cycler-based real-time PCR (LC-PCR) assay that amplifies the F57 sequence of Mycobacterium avium subsp. paratuberculosis was developed.  This assay also includes an internal amplification control template to monitor the amplification conditions in each reaction.  The targeted F57 sequence element is unique for M. avium subsp. paratuberculosis and is not known to exist in any other bacterial species.  The assay specificity was demonstrated by evaluation of 10 known M. avium subsp. paratuberculosis isolates and 33 other bacterial strains.  The LC-PCR assay has a broad linear range (2 x 101 to 2 x106 copies) for quantitative estimation of the number of M. avium subsp. paratuberculosis F57 target copies in positive samples.  To maximize the assay's detection sensitivity, an efficient strategy for isolation of M. avium subsp. paratuberculosis DNA from spiked milk samples was also developed.  The integrated procedure combining optimal M. avium subsp. paratuberculosis DNA isolation and real-time PCR detection had a reproducible detection limit of about 10 M. avium subsp. paratuberculosis cells per ml when a starting sample volume of 10 ml of M. avium subsp. paratuberculosis-spiked milk was analyzed.  The entire process can be completed within a single working day and is suitable for routine monitoring of milk samples for M. avium subsp. paratuberculosis contamination.  The applicability of this protocol for naturally contaminated milk was also demonstrated using milk samples from symptomatic M. avium subsp. paratuberculosis-infected cows, as well as pooled samples from a dairy herd with a confirmed history of paratuberculosis.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, individual dairy cows, dairy herds pooled milk samples, microbial detection assay for milk, polymerase chain reaction, PCR, F57 sequence element amplification, evaluation, assay specificity, animal pathogenic bacteria, disease diagnosis, Johne’s disease, cattle diseases.

Tiwari, A.; VanLeeuwen, J.A.; Dohoo, I.R.; Stryhn, H.; Keefe, G.P.; Haddad, J.P.  Effects of seropositivity for bovine leukemia virus, bovine viral diarrhoea virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum on culling in dairy cattle in four Canadian provinces.  Veterinary Microbiology.  2005.  109(3-4): 147-158.  ISSN: 0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  dairy cattle, Mycobacterium avium subsp. paratuberculosis, Neospora caninum, bovine leukemia virus, bovine diarrhea virus, blood sampling, seropositivity, culling of infected cattle, Canada.

Toft, N.; Nielsen, S.S.; Jorgensen, E.  Continuous-data diagnostic tests for paratuberculosis as a multistage disease.  Journal of Dairy Science.  2005; 88(11): 3923-3931. ISSN:  0022-0302.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Descriptors:  Mycobacterium avium subsp. paratuberculosis, fecal culture testing scheme, linked to indirect ELISA, adjustments for covariates, optical density, Bayesian network.

Tuboly, S.; Kovacs, A.; Lami, E.; Nagy, G.  Az ember Crohn-es a szarvasmarha Johne-betegsege (paratuberculosisa) kozotti osszefuggesek.  [Connections between Crohn’s disease in humans and Johne’s disease (paratuberculosis) in cattle.]  Magyar Allatorvosok Lapja.  2005; 127(2): 106-112.  ISSN:  0025-004X.  Note:  In Hungarian with an English summary.
Descriptors:  cattle, sheep, goats, wild and captive ruminants, deer, mouflon, antelope, Mycobacterium avium subsp. paratuberculosis, serological screening, fecal culture, etiology, animal pathology, clinical aspects, diagnosis, histopathology, pathogenesis, Crohn’s disease, immunodiagnosis, zoonotic potential, Hungary.

United States. Department of Agriculture.  Johne's Disease on U.S. dairy Operations, 2002  Annual Report.  2005; 170 p.
Descriptors:  USDA annual report for Johne’s disease, Mycobacterium avium subsp. paratuberculosis, United States dairy herd operations, herd level management factors, risk assessment, preweaned and post weaned heifer calves, bred heifers, adult cows, disease prevalence, disease testing, data and analysis.

Valeeva, N.I.; Meuwissen, M.P.M.; Lansink, A.G.J.M.O.; Huirne, R.B.M.  Improving food safety within the dairy chain: an application of conjoint analysis.  Journal of Dairy Science.  2005; 88(4): 1601-1612.  ISSN:  0022-0302.
URL:  http://jds.fass.org/cgi/content/abstract/88/4/1601

NAL Call No.:  44.8 J822
Descriptors:  milk, production of pasteurized milk, food safety, residues, quality control, diary farms, antibiotics, dioxins, consumer preferences, dairy farms, dioxins, feeds, bacterial contaminants, Escherichia coli, Mycobacterium avium subsp. paratuberculosis, Salmonella, Staphylococcus aureus.

Van Leeuwen, J.A.; Forsythe, L.A.; Tiwari, A.; Chartier, R.  Seroprevalence of antibodies against bovine leukemia virus, bovine viral diarrhea virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum in dairy cattle in Saskatchewan.  Canadian Veterinary Journal.  2005; 46(1): 56-58.  ISSN: 0008-5286. Note:  In English with a French summary. 
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=202
NAL Call No.:  41.8 R3224
Descriptors:  dairy cattle, immune response, seroprevalence of antibodies, animal pathogens, bovine leukemia virus, bovine diarrhea virus, Mycobacterium avium subsp. paratuberculosis, Neospora canium, Saskatchewan, Canada.

Van Schaik, Gerdien; Stehman, Susan M; Jacobson, Richard H; Schukken, Ynte H.; Shin, Sang J; Lein, Donald H.  Cow-level evaluation of a kinetics ELISA with multiple cutoff values to detect fecal shedding of Mycobacterium avium subspecies paratuberculosis in New York State dairy cows.  Preventive Veterinary Medicine.  2005; 72(3-4): 221-236.  ISSN:  0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis , Johne’s disease, herd sampling, unabsorbed kinetics ELISA (KELA) testing, evaluation of sensitivity and specificity of KELA, fecal shedding, a multiple logistic regression model, serum sampling, within heard prevalence, New York State.

Vansnick, E.; Vercammen, F.; Bauwens, L.; D'Haese, E.; Nelis, H.; Geysen, D.  A survey for Mycobacterium avium subspecies paratuberculosis in the Royal Zoological Society of Antwerp.  Veterinary Journal.  2005; 170(2):  249-256.  ISSN: 1090-0233.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=7163&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f68d9c40dd58509407a11a133122c879
NAL Call No.:  SF601.V484
Descriptors:  Mycobacterium avium subsp. paratuberculosis, survey, European zoo survey, ruminant survey, fecal and post mortem sampling, IS900 PCR, serum tested with ELISA kit, some level of Mycobacterium avium subsp. paratuberculosis was detected, Royal Zoological Society of Antwerp.

Vaughan, J.A.; Lenghaus, C.; Stewart, D.J.; Tizard, M.L.; Michalski, W.P.  Development of a Johne's disease infection model in laboratory rabbits following oral administration of Mycobacterium avium subspecies paratuberculosis.  Veterinary Microbiology.  2005; 105(3-4): 207-213.  ISSN: 0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  paratuberculosis, Mycobacterium avium subsp. paratuberculosis, laboratory animal model, oral dosing model.

Walker, Belinda; Yunamu, Yuni and NSW Agriculture.  Division of Animal Industries. NSW Department of Primary Industries.  Bovine Johne's disease: Australian Johne's disease market assurance program for cattle (CattleMAP). 1st ed.  Agnote NSW Agriculture; 330.  [2005].  Note:  Other title:  Australian Johne's Disease Market Assurance Program for Cattle (CattleMAP).  This Agnote is based on an earlier Agnote (DAI-96) written by Tim Jessep, former Technical Specialist BJD, Goulburn.
URL:  http://www.agric.nsw.gov.au/reader/bjd-trading/bjd-aust-cattlemap.htm.  Title from web site (viewed June 3, 2005).
NAL Call No.:  SF55.A8 A36 no. 330
Descriptors:  paratuberculosis, cattle diseases, prevention, marketing impacts, beef herds, dairy herds, Mycobacterium avium subsp. paratuberculosis, disease control, disease prevention, quality assurance program, CattleMAP, an Australian Market Assurance Programme, participants have herds free of Johne’s disease, Australia.

Weiss, D.J.; Evanson, O.A.; Souza, C. de; Abrahamsen, M.S.  A critical role of interleukin-10 in the response of bovine macrophages to infection by Mycobacterium avium subsp. paratuberculosis.  American Journal of Veterinary Research.  2005; 66(4): 721-726.  ISSN: 0002-9645.
NAL Call No.:  41.8 AM3A
Descriptors:  immune response, in vitro cell cultures, bovine macrophages, infection with Mycobacterium avium subsp. paratuberculosis.

Weiss, D.J.; Evanson, O.A.; Souza, C.D.  Expression of interleukin-10 and suppressor of cytokine signaling-3 associated with susceptibility of cattle to infection with Mycobacterium avium subsp. paratuberculosis.  American Journal of Veterinary Research.  July 2005; 66(7): 1114-1120.  ISSN: 0002-9645.
NAL Call No.:  41.8 AM3A
Descriptors:  cows, Mycobacterium avium subsp. paratuberculosis, cattle, disease susceptibility, interleukin 10 expression, suppression of cytokine signaling-3, Johne’s disease, disease resistance, immune response, cytokines, interleukin-10, interleukin-12, monocytes from cows with subclinical infection, phagocytes, phagocytosis, phagosomes, tumor necrosis factor, zoonotic diseases.

Wernery, U.  The most important infectious diseases in camelids.  In:  Faye, B; Esenov, P. [Editors].  Desertification Combat and Food Safety: The Added Value of Camel Producers, Ashkabad, Turkmenistan, April 19-21, 2004.  2005; 67-69.  ISBN:  1586034731.
Descriptors:  dromedary camels, Bactrian camels, list of many diseases, bacterial, viral, and various ecto and endo parasites, Mycobacterium avium subsp. paratuberculosis, Mycobacterium tuberculosis.

Western Australia.  Dept. of Agriculture.  Ovine Johne's disease: management options.  Bulletin Western Australia. Dept. of Agriculture,  2001; 4631. [2005?], [4] p., col. ill. 
NAL Call No.:  S478.A82 W47 no. 4631
Descriptors:  paratuberculosis, Mycobacterium avium subsp. paratuberculosis, disease management possibilities, disease control strategies, Australia.

Western Australia. Dept. of Agriculture.  Ovine Johne's disease: minimise the risk.  Bulletin Western Australia. Dept. of Agriculture,  2001; 4634.  [2005?], 1 sheet (2 p.), col. ill.
NAL Call No.:  S478.A82 W47 no. 4634
Descriptors:  sheep, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, management strategies to reduce risk of infection, Australia.

Western Australia. Dept. of Agriculture.  Ovine Johne's disease: SheepMAP.  Bulletin Western Australia. Dept. of Agriculture, 2001; 4633.  [2005?], 1 sheet (2 p.), col. ill.
NAL Call No.:  S478.A82 W47 no. 4633
Descriptors:  sheep, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, pathogen strains in sheep, Australia.

Western Australia. Dept. of Agriculture.  Ovine Johne's disease: the disease.  Bulletin Western Australia. Dept. of Agriculture, 2001; 4630.  [2005?], [4] p., col. ill. 
NAL Call No.:  S478.A82 W47 no. 4630
Descriptors:  paratuberculosis, Mycobacterium avium subsp. paratuberculosis, sheep, description of the disease, pathology, Australia.

Western Australia.  Dept. of Agriculture.  Ovine Johne's disease: vaccination.  Bulletin Western Australia. Dept. of Agriculture, 2001; 4632.  [2005?], [4] p., col. ill. 
NAL Call No.:  S478.A82 W47 no. 4632
Descriptors:  sheep, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, control, vaccination, Australia.

Whan, L.; Ball, H.J.; Grant, I.R.; Rowe, M.T.  Development of an IMS-PCR assay for the detection of Mycobacterium avium ssp paratuberculosis in water.  Letters in Applied Microbiology.  2005; 40(4): 269-273.  ISSN:  0266-8254.  
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=lam
NAL Call No.:  QR1.L47
Descriptors: human diseases, animal diseases, polluted water, Mycobacterium avium subsp. paratuberculosis, detection, centrifugation, methodology, immunomagnetic separation polymerase chain reaction (IMS-PCR), IS900 PCR, Tween 80 concentration, sensitive method.

Whan, Lynne; Ball, Hywel J.; Grant, Irene R.; Rowe, Michael T.  Occurrence of Mycobacterium avium subsp. paratuberculosis in untreated water in Northern Ireland.  Applied and Environmental Microbiology.  2005; 71(11): 7107-7112.  ISSN: 0099-2240.
URL:  http://aem.asm.org/contents-by-date.0.shtml
NAL Call No.:  448.3 AP5
Abstract:  Mycobacterium avium subsp. paratuberculosis is the known cause of Johne's disease of both domestic and wild ruminants and has been implicated as a possible cause of Crohn's disease in humans.  The organism is shed in the feces of infected animals and can survive for protracted periods in the environment and hence could be present in catchment areas receiving agricultural runoff.  A limited survey was undertaken in Northern Ireland to test for M. avium subsp. paratuberculosis in untreated water entering nine water treatment works (WTWs) over a 1-year period.  Three detection methods were employed, viz., immunomagnetic separation-PCR and culture on Herrold's egg yolk medium (HEYM) and BACTEC 12B medium, the latter both supplemented with mycobactins.  Of the 192 untreated water samples tested, 15 (8%) tested M. avium subsp. paratuberculosis positive by one or more of the three detection methods.  M. avium subsp. paratuberculosis was successfully isolated from eight untreated water samples, three by BACTEC culture and five by culture on HEYM.  Although the highest incidence of M. avium subsp. paratuberculosis was found in spring, overall, there was no statistically significant difference between the seasons.  No significant correlation was found between numbers of coliforms or fecal coliforms and the presence of M. avium subsp. paratuberculosis.  In general, a higher incidence of M. avium subsp. paratuberculosis was found in untreated water entering those WTWs that had a high mean water pH value over the sampling period.  This work indicates the need to determine the efficacy of water treatment processes to either kill or remove M. avium subsp. paratuberculosis from untreated water and the possible risks posed by contact with recreational water sources.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, bacterial agent of Johne’s disease of ruminants, possible cause of Crohn’s disease in humans, survey testing of untreated water, 3 detection methods, immunomagnetic separation-PCR, culture on Herrold's egg yolk medium (HEYM), BACTEC 12B medium, 15% positive, efficacy of water treatment, possible contamination of recreational water sources, seasonal differences, Northern Ireland. 

Whittington, Richard J.; Marsh, Ian B.; Reddacliff, Leslie A.  Survival of Mycobacterium avium subsp. paratuberculosis in dam water and sediment.  Applied and Environmental Microbiology.  2005; 71(9): 5304-5308.  ISSN:  0099-2240.  
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=1214599
NAL Call No.:  448.3 AP5
Descriptors:  Mycobacterium avium subsp. paratuberculosis, survival in water, survival in sediment, dam water, large water troughs, sediment in shade, semi exposed location, fecal material in shade, water as a reservoir for pathogen, potential for transmission to humans, Crohn’s disease.


Return to Contents

2004

Ali Vehmas, T.; Moisander, A.M.; Soini, H.  Yleiskatsaus mykobakterioosien esiintymisesta ja Suomen tilanteesta.  [Mycobacteriosis - a review and survey in Finland.]  Suomen Elainlaakarilehti.  2004; 110(2): 79-84.  ISSN:  0039-5501.  Note:  In Finnish with an English summary.
NAL Call No.:  41.8 F49
Descriptors:  pigs, humans, bacterial diseases, disease surveys, Mycobacterium, Mycobacterium avium complex, Mycobacterium avium subsp. paratuberculosis, Mycobacterium tuberculosis, epidemiology, diagnosis, drug therapy, isoniazid, rifampicin, zoonoses, Finland.

Amemori, T.; Matlova, L.; Fischer, O.A.; Ayele, W.Y.; Machackova, M.; Gopfert, E.; Pavlik, I.  Distribution of Mycobacterium avium subsp. paratuberculosis in the gastrointestinal tract of shedding cows and its application to laparoscopic biopsy.  Veterinarni Medicina.  2004; 49(7): 225-236.  ISSN:  0375-8427.
URL:  http://vetmed.vri.cz/
NAL Call No.:  41.9 C333
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, sampling of 10 areas of gastrointestinal tract, distribution of bacteria, jejunum mucosa, to the ileocecal valve, in the lymph nodes from jejunum to the cecum, laproscopy for sampling unsuccessful.

Amonsin, A.; Li, L.L.; Zhang, Q.; Bannantine, J.P.; Motiwala, A.S.; Sreevatsan, S.; Kapur, V.  Multilocus short sequence repeat sequencing approach for differentiating among Mycobacterium avium subsp. paratuberculosis strains.  Journal of Clinical Microbiology.  2004; 42(4): 1694-1702.  ISSN:  0095-1137.
URL:  http://jcm.asm.org/cgi/content/abstract/42/4/1694
NAL Call No.:  QR46.J6
Descriptors:  cattle and sheep isolates, 33 Mycobacterium avium subsp. paratuberculosis isolates, bacterial cattle disease, Johne’s disease, genotyping, 20 multilocus short sequence repeat (MLSSR) types, 11 polymorphic short sequence repeats (SSRs), genome analysis, genomes, genotypes, loci, molecular biology, molecular genetics, MLSSR results in easy, reproducible and high resolution subtyping.

Anderton, Matthew C.; Bhakta, Sanjib; Patrick, Anna L.; Sim, Edith.  Characterisation of the putative operon containing arylamine N-acetyltransferase (NAT) in mycobacteria.  Drug Metabolism Reviews.  2004; 36(Suppl. 1): 161.  ISSN:  0360-2532.  Note:  7th International Meeting of the International Society for the Study of Xenobiotics, Vancouver, BC, Canada; August 29-September 02, 2004.
NAL Call No.:  RM301.D73
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, Mycobacterium tuberculosis, Mycobacterium smegmatis, arylamine N-acetyltransferase, operons, drug therapy.

Andrews, A.H.  Colostrum - not just for 24 hours.  Cattle Practice.  2004; 12(2): 121-124.  ISSN:  0969-1251.
NAL Call No.:  SF961.C37
Descriptors:  calves, nutrition colostrum feeding, intestinal lining exposed to local immunoglobulins that attach to endothelial receptors, block ability of pathogens to attach, and reproduce or cause disease, vaccination of dams for rotovirus, coronovirus, E. coli, Salmonella, Eimeria, Mycobacterium avium subsp. paratuberculosis.

Ayele, W.Y.; Bartos, M.; Svastova, P.; Pavlik, I.  Distribution of Mycobacterium avium subsp. paratuberculosis in organs of naturally infected bull-calves and breeding bulls.  Veterinary Microbiology.  2004; 103(3-4): 209-217.  ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8 NAL Call No.:  SF601.V44
Descriptors:  bull calves, breeding bulls, various breeds, Holstein-Friesian, Piemonte, Hereford, Simmental, natural infection, Mycobacterium avium subsp. paratuberculosis, semen derived infection, serum, fecal and tissue culture, liver, spleen, testes, sub clinically infected release Mycobacterium avium subsp. paratuberculosis in semen.

Bannantine, J.P.; Hansen, J.K.; Paustian, M.L.; Amonsin, A.; Li, L.L.; Stabel, J.R.; Kapur, V.  Expression and immunogenicity of proteins encoded by sequences specific to Mycobacterium avium subsp. paratuberculosis.  Journal of Clinical Microbiology.  2004; 42(1): 106-114.  ISSN:  0095-1137.
URL:   http://jcm.asm.org/cgi/content/abstract/42/1/106
NAL Call No.:  QR46.J6
Descriptors:  cattle, mice, rabbits, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium complex, animal disease models, laboratory animals, immunoassay as a diagnostic technique, cloning, heterologous expression, antigenic analysis of Mycobacterium avium subsp. paratuberculosis specific sequences in Escherichia coli, binding proteins, gene expression, nucleotide sequences.

Basagoudanavar, S.H.; Goswami, P.P.; Tiwari, V.; Pandey, A.K.; Singh, N.  Heterologous expression of a gene encoding a 35 kDa protein of Mycobacterium avium paratuberculosis in Escherichia coli.  Veterinary Research Communications.  2004; 28(3): 209-224.  ISSN: 0165-7380.
URL:  http://www.kluweronline.com/issn/0165-7380/contents
NAL Call No.:  SF601.V38
Descriptors:  gene expression, Escherichia coli, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, bacterial proteins, nucleic acid hybridization, genetically engineered microorganisms, genetic recombination, transposons, polyclonal antibodies, guinea pigs, laboratory animals, delayed hypersensitivity, cell mediated immunity, purification, cloning DNA, solubility, cross reaction, open reading frames, 35kDa protein genes, recombinant surface proteins, immune response, plasmids, insertion into Escherichia coli expression plasmid pQE32=pPMP35, was transformed into E. coli M15, expression confirmed with immunoblotting, reacted with rabbit antiserum to Mycobacterium avium subsp. paratuberculosis, reacted with serum of infected goat, recognized as a membrane fraction, evoked skin reaction in sensitized guinea pigs, 35kDa is a membrane protein.

Basler, T.; Geffers, R.; Weiss, S.; Valentin-Weigand, P.; Goethe, R.  Macrophages infected with Mycobacterium avium ssp paratuberculosis display a specific gene expression program and activating capacity towards enterocytes.  Immunobiology.  2004; 209(4-6): 392.  ISSN:  0171-2985.  Note:  Joint Annual Meeting of the German and Dutch Societies for Immunology, Maastricht, The Netherlands; October 20-23, 2004.
NAL Call No.:  QR180.Z4
Descriptors:  Mycobacterium avium subsp. paratuberculosis, infected macrophages, infection response, gene expression, activating capacity, response to enterocytes. 

Beyerbach, M.; Ortmann, G.; Gerlach, G.F.; Homuth, M; Strutzberg, K.; Kreienbrock, L.  Uberlegungen zu diagnostischen Sicherheiten und Cut-Off-Werten fur einen Sammelmilch-ELISA auf Paratuberkulose.  [Considerations concerning diagnostic probabilities and cut-off values for a Mycobacterium avium ssp. paratuberculosis bulk milk ELISA.]  DTW (Deutsche Tieraerztliche Wochenschrift).  2004; 111(5): 220-225.  ISSN:  0341-6593.  Note:  In German with an English summary.
NAL Call No.:  41.8 D482
Descriptors: dairy cows, Johne’s disease, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, disease diagnosis, diagnostic techniques, disease prevalence, disease surveys, ELISA, bulk milk, reference works, regression analysis, mathematical models, Brandenburg, Germany.  

Boettcher, J.; Gangl, A. Mycobacterium avium ssp paratuberculosis - Combined serological testing and classification of individual animals and herds.  Journal of Veterinary Medicine Series B.  2004; 51(10): 443-448. ISSN:  0931-1793.
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=jvb
NAL Call No.:  41.8 Z52
Descriptors:  2748 bovine sera, 119 Bavarian herds, 3 commercial tests, testing scheme proposed, individual animals, herds. 

Bowen, J.S.  Small ruminant tips for small animal practitioners.  Large Animal Proceedings of the North American Veterinary Conference, Orlando, Florida, USA, January 17-21, 2004.  2004; 18: 266-269.
Descriptors:  goats, sheep, small ruminant health, small animal veterinary practice; veterinarians, animal husbandry, clinical examination drug residues, metabolic disorders, coccidiosis, enterotoxemia, pneumonia, scrapie, zoonoses, caprine arthritis encephalitis virus, Clostridium perfringens, Corynebacterium pseudotuberculosis, Mycobacterium avium subsp. paratuberculosis, Mycoplasma, Johne’s disease.

Bowen, J.S.  Tough diseases of goats.  Large Animal Proceedings of the North American Veterinary Conference, Orlando, Florida, USA, January17-21, 2004.  2004; 18: 255-256.
Descriptors:  goats, small ruminants, various diseases, disease transmission, lymph nodes, lymphadenitis, lymphatic diseases, Johne’s disease, caprine arthritis encephalitis virus, Corynebacterium pseudotuberculosis, Mycobacterium avium subsp. paratuberculosis, Mycoplasma.

Branscum, A.J.; Gardner, I.A.; Johnson, W.O.  Bayesian modeling of animal and herd level prevalences.  Preventive Veterinary Medicine.  2004; 66(1/4): 101-112.  ISSN:  0167-5877. 
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f NAL Call No.:  SF601.P7
Descriptors:  cattle, animal level based on polled sampling, herd level disease prevalence, epidemiology, Bayesian theory approach, mathematical models, WinBUGS computer software, animal diseases, Brucella abortus, Salmonella interitidis, Mycobacterterium avium subsp. paratuberculosis, brucellosis, Johne’s disease, computer software, diagnostic techniques, disease surveys, California, United States.  

Brumbaugh, G.W.; Simpson, R.B.; Edwards, J.F.; Anders, D.R.; Thomson, T.D.  Susceptibility of Mycobacterium avium subsp. paratuberculosis to monensin sodium or tilmicosin phosphate in vitro and resulting infectivity in a murine model.  Canadian Journal of Veterinary.  2004; 68(3): 175-181.  ISSN: 0830-9000.  Note:  In English with a French summary.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=133
NAL Call No.:  SF601.C24
Descriptors: paratuberculosis, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, antibacterial properties, macrolide antibiotics, cattle diseases, laboratory mice, infectious disease model.

Buergelt, C.D.; Donovan, G.A.; Williams, J.E.  Identification of Mycobacterium avium subspecies paratuberculosis by polymerase chain reaction in blood and semen of a bull with clinical paratuberculosis.  Journal of Applied Research in Veterinary Medicine.  2004; 2(2): 130-134.  ISSN:  1542-2666.
URL:  http://www.jarvm.com/
Descriptors:  cattle, Holstein breeding bulls, clinical signs of Johne’s disease, blood samples, semen samples, agar gel immunoduffusion, ELISA, 3 negative fecal cultures, no necropsy done, bacteria may disseminate via blood to reproductive tract.

Buergelt, C.D.; Williams, J.E.  Nested PCR on blood and milk for the detection of Mycobacterium avium subsp paratuberculosis DNA in clinical and subclinical bovine paratuberculosis.  Australian Veterinary Journal.  2004; 82(8): 497-503.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  cattle bacterial disease, clinical and subclinical infections, disease detection and diagnosis, blood sampling, milk sampling, nested PCR.

Buergelt, C.D.; Bastianello, S.S.; Michel, A.L.  Paratuberculosis.  In: Coetzer, J.A.W; Tustin, R.C. [Editors].  Infectious Diseases of Livestock.  Volume 3, 2nd Edition.  Oxford University Press, Oxford, UK.  2004; 1994-2008.  ISBN:  0195761715.
NAL Call No.:  SF781.I525 2004
Descriptors:  livestock, culling infected animals, etiology, diagnostic techniques, differential diagnostic methods, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, etiology, pathogenesis, histopathology, epidemiology, disease prevalence, disease control and prevention, vaccines, disease transmission, antibacterial agents, clinical aspects, Crohn's disease, drug therapy, zoonoses, public health concerns.

Buergelt, C.D.; Williams, J.E.; Monif, G.R.G.  Spontaneous clinical regression of Johne's disease in a Holstein cow: a case report.  Journal of Applied Research in Veterinary Medicine.  2004; 2(2): 126-129.  ISSN:  1542-2666.
URL:  http://www.jarvm.com/
Descriptors:  Holstein cow diagnosed with Johnes’s disease, Mycobacterium avium subsp. paratuberculosis, spontaneous regression, serologic titers decreased, fecal shedding abated, changes in environment may have triggered immune and host responses to cure the disease.

Bull, R.; Brooks, R.; Molesworth, R.; Watt, R.  Ovine Johne's Disease Interim Steering Committee Final Report 2004.  2004; 9 p.  ISBN:  0734716079.
Descriptors:  “Building Block for Ovine Johne’s Disease,” risk based training system, introduction of mandatory health declaration of all traded sheep, penalties for false information, Guidair vaccine for disease control, marker to show vaccination, Property Disease Management Programmes, New South Wales, Australia.

Burr, P.  Health schemes: are they only for the minority?  Cattle Practice.  2004; 12(4): 255-257.  ISSN:  0969-1251.
NAL Call No.:  SF961.C37
Descriptors:  cattle health schemes, farmers, costs of disease control and prevention, bovine diarrhea virus, bovine herpesvirus 1, Mycobacterium avium subsp. paratuberculosis, resistance of farmers to benefits of higher health status, United Kingdom.  

Buza, Jorarn J.; Hikono, Hirokazu; Mori, Yasuyuki; Nagata, Reiko; Hirayama, Sachiyo; Bari, Abusaleh M.; Aodon Geril; Shu, Yujing; Tsuji, Noriko M.; Momotani, Eiichi.  Neutralization of interleukin-10 significantly enhances gamma interferon expression in peripheral blood by stimulation with Johnin purified protein derivative and by infection with Mycobacterium avium subsp. paratuberculosis in experimentally infected cattle with paratuberculosis.  Infection and Immunity.  2004; 72(4): 2425-2428.  ISSN:  0019-9567.
URL:  http://www.jarvm.com/
NAL Call No.:  QR1.I57
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, peripheral blood mononuclear cells, experimental infections, gene expression, immune response, interferon, interleukin-10 suppressive effects, IFN gamma secretion, monoclonal antibodies, paratuberculosis.

Caldow, G.  Biosecurity, does it have a place in the management of beef herds in the United Kingdom?  Cattle Practice.  2004; 12(2): 149-153.  ISSN:  0969-1251.
NAL Call No.:  SF961.C37
Descriptors:  beef cattle herds, losses due to infectious disease, cost of biosecurity systems, purchasing policies for breeding replacements, recommend and industry-wide approach, disease control programs, vaccination, salmonellosis, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, bovine diarrhea virus, United Kingdom.

Caldow, G.; Gunn, G.; Crawshaw, M.; Rusbridge, S.; McDiarmid, J.  Can test and cull be a part of Johne's disease control?  Cattle Practice.  2004; 12(4): 249-253.  ISSN:  0969-1251.
NAL Call No.:  SF961.C37
Descriptors:  cattle, disease control program, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, epidemiology, test and cull strategy for infected herds, diagnostic tests, disease prevalence, disease prevention, disease transmission, Great Britain.

Carpenter, T.E.; Gardner, I.A.; Collins, M.T.; Whitlock, R.H.  Effects of prevalence and testing by enzyme-linked immunosorbent assay and fecal culture on the risk of introduction of Mycobacterium avium subsp. paratuberculosis-infected cows into dairy herds.  Journal of Veterinary Diagnostic Investigation.  2004; 16(1): 31-38.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  dairy herd, stochastic simulation model for risk of Mycobacterium avium subsp. paratuberculosis introduced with female replacements, data included: effects of bacteria prevalence in source herd(s) disease status, number of females purchased, ELISA alone or ELISA and fecal culture, data varied according to disease levels of source herds.

Chacon, O.; Bermudez, L.E.; Barletta, R.G.  Johne's disease, inflammatory bowel disease, and Mycobacterium paratuberculosis.  Annual Review of Microbiology.  2004; 58: 329-363.  ISSN:  0066-4227.  Note:  A review article.
URL:  http://arjournals.annualreviews.org/loi/micro?cookieSet=1
NAL Call No.:  448.3 AN72
Descriptors:  Mycobacterium avium subsp. paratuberculosis, etiology of diarrheal diseases, Johne’s disease, possible agent of Crohn’s disease, microbial factors of pathogenicity, issues and controversy of pathogenic role in humans.

Chauhan, R.S.; Al Ani, F.K.  Bacterial diseases.  In:  Al Ani, F.K.  [Editor].  Camel: Management and Diseases. Published by the Faculty of Veterinary Medicine, Baghdad University.  Baghdad, Iraq.  2004; 385-408.
Descriptors:  camels, dromedaries, bacterial diseases, etiology, epidemiology, clinical picture, diagnostic techniques, disease control and prevention, drug therapies, bacterial toxins, pathogenesis, actinomycosis, anaplasmosis, anthrax, botulism, brucellosis, glanders, hemorrhagic septicemia, heartwater, Johne’s disease, leptospirosis, listeriosis, Lyme disease, melioidosis, mycoplasmosis, paratuberculosis, tuberculosis, pasteurellosis, plague, pododermatitis, Q fever, salmonellosis, tetanus, tickborne fever.

Chavez-Gris, Gilberto; Trigo-Tavera, Francisco J.; Svastova, Petra; Pavlik, Ivo.  Identificacion del polimorfismo genetico de aislamientos de Mycobacterium avium subespecie paratuberculosis de caprinos del centro de Mexico.  [Genetic polymorphism identification from Mycobacterium avium subspecies paratuberculosis in goats in central Mexico.]  Veterinaria Mexico.  2004; 35(1): 75-82.  ISSN:  0301-5092.  Note:  In English and Spanish.  
URL:  http://www.medigraphic.com/veterinariamexico/
NAL Call No.:  SF604.V485
Descriptors:  goats, Mycobacterium avium subsp. paratuberculosis, genetic polymorphism, IS900 probe, BstEII restriction enzyme, C1 type, epidemiological study, disease, control, Mexico.  

Chui, Linda W.; King, Robin; Lu, Patricia; Manninen, Ken; Sim, Jeong.  Evaluation of four DNA extraction methods for the detection of Mycobacterium avium subsp. paratuberculosis by polymerase chain reaction.  Diagnostic Microbiology and Infectious Disease.  2004; 48(1): 39-45.  ISSN:  0732-8893.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5016&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=a834b5d6c5e60ba3bd43424467395f82 NAL Call No.:  QR67.D53
Descriptors:  DNA extraction methods, Mycobacterium avium subsp. paratuberculosis, rapid lysis, organic extraction, silica based and magnetic particle based technologies (MagaZorb TM), bacterial cells, spiked bovine feces, efficiency of extraction, PCR end point titration, insertion sequence IS900.

Chui, Linda W.; King, Robin; Chow, Eva Y.W.; Sim, Jeong.  Immunological response to Mycobacterium avium subsp. paratuberculosis in chickens.  Canadian Journal of Veterinary Research.  2004; 68(4): 302-308.  ISSN:  0830-9000.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=133
NAL Call No.:  SF601.C24
Descriptors:  chickens, immune capture assay followed by PCR, heat and formalin inactivated Mycobacterium avium subsp. paratuberculosis, immune response, IgY, diagnosis, diagnostic techniques, immune response, immunization.

Cismileanu, A.; Samarineanu, M.; Sarca, M.; Medeanu, R.  Profilul electroforetic si prin Western blot al unui antigen de tip lipoarabinomanan (LAM) de Mycobacterium avium subspecia paratuberculosis.  [The profile of a lipoarabinomannan-type antigen (LAM) of Mycobacterium avium subspecies paratuberculosis determined by electrophoresis and Western Blot.]  Revista Romana de Medicina Veterinara.  2004; 14(1): 81-88.  ISSN:  1220-3173.  Note:  In Rumanian with an English summary.
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, bacterial antigen, lipoarabinomannan, carbohydrates, electrophoresis, Western blot, proteins, SDS-PAGE.

Collins, J.D.; Wall, P.G.  Food safety and animal production systems: controlling zoonoses at farm level.  Revue Scientifique et Technique Office International des Epizooties.  2004; 23(2): 685-700.  ISSN:  0253-1933.  ISBN:  9290446218.  Note:  In English with Spanish and French summaries.  
Descriptors:  food safety, animal production systems, disease control and prevention, epidemiology, feeds, stressors, risk assessments, selection pressure, transport of animals, tuberculosis, Johne’s disease, paratuberculosis, Brucella, Camplobacter, E. coli, Listeria, Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis, Salmonella, Trichinella, Yersinia, Toxoplasma, zoonotic diseases.

Collins, M.T.  Update on paratuberculosis. 3. Control and zoonotic potential.  Irish Veterinary Journal.  2004; 57(1): 49-52.  ISSN:  0368-0762.
Descriptors:  cattle, calves, humans, Mycobacterium avium subsp. paratuberculosis, clinical aspects, diagnosis, disease control and prevention, disease transmission, potential zoonotic disease, Crohn’s disease.

Corner, L.A.L.; Pfeiffer, D.U.; Abbott, K.A.  The respiratory tract as a hypothetical route of infection of cattle with Mycobacterium avium subspecies paratuberculosis.  Australian Veterinary Journal.  2004; 82(3): 170-173.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  Mycobacterium avium subsp. paratuberculosis, cattle, route of infection, respiratory tract, disease infection hypothesis.

Costa, E.F.; Fazzio, L.E.; Traveria, G.E.; Sanchez, R.O.; Alvarado-Pinedo, M.F.; Mattioli, G.A.; Otero, M.M.; Chialva, M.; Romero, J.R.  Causas de mortalidad y aborto en bovinos informe de 1163 casos entre 1986 y 2001 en la provincia de Buenos Aires.  [Causes of mortality and abortion in cattle.  Report of 1163 cases from 1986 to 2001 in Buenos Aires, Argentina.]  Revista de Medicina Veterinaria Buenos Aires.  2004; 85(1): 16-22.  ISSN:  0325-6391.  Note:  In Spanish with an English summary.  
Descriptors:  cattle, necropsies, examination, death, abortion, ranges of ages, neonates—colibacillosis, 1-8 months—pneumonia, 8-18 months—mucosal disease, anthrax, various parasitic diseases, over 18 months, nutritional deficiencies, metabolic diseases, important infectious diseases—anthrax and Mycobacterium avium subsp. paratuberculosis.

Coussens, P.M.; Verman, N.; Coussens, M.A.; Elftman, M.D.; McNulty, A.M.  Cytokine gene expression in peripheral blood mononuclear cells and tissues of cattle infected with Mycobacterium avium subsp. paratuberculosis: evidence for an inherent proinflammatory gene expression pattern.  Infection and Immunity.  2004; 72(3): 1409-1422.  ISSN:  0019-9567.
URL:  http://iai.asm.org/cgi/content/abstract/72/3/1409
NAL Call No.:  QR1.I57
Descriptors:  infected cows, Mycobacterium avium subsp. paratuberculosis, suppression of a proinflammatory gene expression pattern, peripheral blood mononuclear cells, PBMCs, genes encoding interleukin-1 alpha (IL-1 alpha ), IL-2, IL-4, IL-5, IL-6, IL-8, IL-10, IL-12p35, IL-16, IL-18, interferon-gamma, transforming growth factor beta (TGF-beta ), tumor necrosis factor alpha (TNF-alpha), mesenteric lymph nodes draining infection sites.

Coussens, Paul.  Development of gene expression signatures for chronic infectious diseases, a bovine model.  Tissue Antigens.  2004; 64(4): 361.  ISSN:  0001-2815.  Note:  1st International Conference on Basic and Clinical Immunogenomics, Budapest, Hungary; October 03-07, 2004.
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, gene expression, animal disease model, Crohn's disease, chronic granulomatous enteritis, EST sequence.

Coussens, Paul M.  Model for immune responses to Mycobacterium avium subspecies paratuberculosis in cattle.  Infection and Immunity.  2004; 72(6): 3089-3096.  ISSN:  0019-9567.
URL:   http://iai.asm.org/cgi/content/full/72/6/3089
NAL Call No.:  QR1.I57
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, simulation models, immune response.

Coussens, P.M.; Jeffers, A.; Colvin, C.  Rapid and transient activation of gene expression in peripheral blood mononuclear cells from Johne's disease positive cows exposed to Mycobacterium paratuberculosis in vitro.  Microbial Pathogenesis.  2004; 36(2): 93-108.  ISSN: 0882-4010.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6954&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=0ce0cc81f81ede9640040947d652abf1 NAL Call No.:  QR175.M53
Descriptors:  Mycobacterium avium subsp. paratuberculosis, paratuberculosis, dairy cows, gene expression regulation.

Cvetnic, Z.; Ocepek, M.; Spiic, S.; Habrun, B.; Mitak, M.; Krt, B.  Usporedba razliitih metoda dijagnostike paratuberkuloze u uzgoju mlijenih goveda.  [Comparison of different diagnostic methods for paratuberculosis in dairy cattle breedings.]  Veterinarska Stanica.  2004; 35(1): 5-13.  ISSN:  0350-7149.  Note:  In Croation with an English summary.  
Descriptors:  dairy cow farm, tuberculin testing, non-specific reactions, clinical symptoms pointed to paratuberculosis, serological testing, RVC, GDP test, ELISA and gamma IFN test together were best, different levels of sensitivity found, Croatia.

Dargatz, D.A.; Byrum, B.A.; Collins, M.T.; Goyal, S.M.; Hietala, S.K.; Jacobson, R.H.; Kopral, C.A.; Martin, B.M.; McCluskey, B.J.; Tewari, D.  A multi-laboratory evaluation of a commercial enzyme-linked immunosorbent assay test for the detection of antibodies against Mycobacterium avium subsp. paratuberculosis in cattle.  Journal of Veterinary Diagnostic Investigation.  2004; 16(6): 509-514.  ISSN: 1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  cows, Mycobacterium avium subsp. paratuberculosis, enzyme linked immunosorbent assay, antibody detection, laboratories, analytical kits, testing, variance, sources of variability.

Davidson, William R.; Manning, Elizabeth J. B.; Nettles, Victor F. Culture and serologic survey for Mycobacterium avium subsp. paratuberculosis infection among Southeastern white-tailed deer (Odocoileus virginianus).  Journal of Wildlife Diseases.  2004; 40(2): 301-306.  ISSN:  0090-3558.
URL: http://www.jwildlifedis.org/
NAL Call No.:  41.9 W64B
Descriptors: white tailed deer, Odocoileus virginianus, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, survey of disease levels, ELISA, lymph nodes, serology, surveillance of wild populations, currently not a disease reservoir, Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, West Virginia, United States.

Dimareli-Malli, Z.; Samarineanu, M.; Sarca, M.; Zintzaras, E.; Sarris, K.; Tsitsamis, S.  Statistical evaluation of ELISA methods for testing caprine paratuberculosis.  Journal of Applied Research in Veterinary Medicine.  2004; 2(1): 10-16.  ISSN:  1542-2666.
URL:  http://www.jarvm.com/
NAL Call No.:  SF601.J63
Descriptors:  goats, Mycobacterium avium subsp. paratuberculosis. testing of 4 ELISA assays for diagnostic value-- LAM-A, LAM-P, GP, IDEXX-ELISA, and AGIT; a comparison study testing for sensitivity and specificity, 44 infected animals, 73 clinically healthy from infected herds, 62 known negatives, results presented show AGIT has high specificity, Greece, Mediterranean regions.

Dufour, Barbara; Pouillot, Regis; Durand, Benoit.  A cost/benefit study of paratuberculosis certification in French cattle herds.  Veterinary Research.  2004; 35(1): 69-81.  ISSN:  0928-4249.  
NAL Call No.:  SF602.A5
Descriptors:  cattle herds, Mycobacterium avium subsp. paratuberculosis, paratuberculosis certification, cost/benefit analysis, disease control, France.

Ellingson, J.L.E.; Koziczkowski, J.J.; Anderson, J.L.  Comparison of PCR prescreening to two cultivation procedures with PCR confirmation for detection of Mycobacterium avium subsp. paratuberculosis in U.S. Department of Agriculture fecal check test samples.  Journal of Food Protection.  2004; 67(10): 2310-2314.  ISSN: 0362-028X.
NAL Call No.:  44.8 J824
Abstract:  Mycobacterium avium subsp. paratuberculosis (MAP) is the etiologic agent in Johne's disease in cattle and causes diarrhea, decreased milk production, emaciation, and frequently death.  The ability to detect MAP rapidly and accurately is an integral part of herd management.  However, detection of this bacterium is complicated due to its slow division time and its ability to enter dormancy.  Culture methods are considered the "gold standard", but they have their limitations.  Many enzyme-linked immunosorbent assay methods and conventional PCR methods have been used as diagnostic tools.  The present study compares the results of a PCR prescreen to two culture methods of detection paired with confirmatory PCR to determine the most accurate, rapid, and sensitive method using U.S. Department of Agriculture (USDA) fecal check samples.  This study involving two laboratories (Marshfield Clinic Laboratories, using solid culture medium [Herrold's egg yolk agar], and TREK Diagnostic Systems Research and Development, using liquid culture medium [ESP Culture System II]) showed that the PCR prescreening method used in this study lacked specificity and sensitivity as a stand-alone test in fecal samples.  However, the combination of liquid enrichment culture using the ESP II system, and PCR confirmation with the hspX primer set, was not only 100% sensitive and specific but also correlated with viable MAP and USDA culture results.
Descriptors:  dairy cattle, feces, microbial detection, methodology, polymerase chain reaction, USDA, culture media, Mycobacterium avium subsp. paratuberculosis, animal pathogenic bacteria, pathogenesis related proteins, virulence, genes, clinical examination, rapid methods, food safety.

Emery, D.L.; Whittington, R.J.  An evaluation of mycophage therapy, chemotherapy and vaccination for control of Mycobacterium avium subsp. paratuberculosis infection.  Veterinary Microbiology.  2004; 104(3/4): 143-155.  ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8 NAL Call No.:  SF601.V44
Descriptors:  sheep, ruminants, bacterial pathogen, Mycobacterium avium subsp. paratuberculosis, disease control, various treatment options reviewed, chemotherapy, vaccination, mycophages, chemotherapeutic regimes, costs, effectiveness of  live and killed mycobacterian vaccines, neonatal vaccination with defined doses of bacteria, induction of protective Th1 type immunity.

Fischer, O.A.; Matlova, L.; Dvorska, L.; Svastova, P.; Peral, D.L.; Weston, R.T.; Bartos, M.; Pavlik, I.  Beetles as possible vectors of infections caused by Mycobacterium avium species. Veterinary Microbiology.  2004; 102(3-4): 247-255.  ISSN: 0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8 NAL Call No.:  SF601.V44
Descriptors:  insect vectors, Mycobacterium avium subsp. hominissuis, animal pathogenic bacteria, disease transmission, paratuberculosis, zoonoses, adult insects, isolation, Coleoptera, larvae, Tenebrio molitor, Zophobas atratus, barns, bran, peat, Mycobacterium avium subsp. avium, disease detection, avian tuberculosis, bovine tuberculosis, Slovakia, Czech Republic.

Fischer, O.A.; Matlova, L.; Dvorska, L.; Svastova, P.; Bartl, J.; Weston, R.T.; Pavlik, I.  Blowflies Calliphora vicina and Lucilia sericata as passive vectors of Mycobacterium avium subsp. avium, M. a. paratuberculosis and M. a. hominissuis.  Medical and Veterinary Entomology.  2004; 18(2): 116-122.  ISSN: 0269-283X.
NAL Call No.:  RA639.M44
Abstract:  Mycobacterium avium subsp. paratuberculosis (Actinomycetales: Mycobacteriaceae) isolates of identical restriction fragment length polymorphism (RFLP) type B-C1 were isolated from: intestinal mucosa of two cows showing clinical signs of paratuberculosis, a specimen of the blowfly Calliphora vicina Robineau-Desvoidy (Diptera: Calliphoridae) captured while perched on these cattle intestines in a waste container at the site of the slaughter, and the blowflies C. vicina and Lucilia caesar Linnaeus captured the next day at the same site when no infected cattle with paratuberculosis were slaughtered.  Subsequently, second-stage larvae of the blowflies C. vicina and Lucilia sericata (Meigen) were experimentally infected by feeding them liver from hens with avian tuberculosis caused by M. a. avium (serotype 1, genotype IS901+ and IS1245+) and small cuts of pork meat contaminated with M. a. hominissuis (serotype 8, genotype IS901- and IS1245+). Mycobacterium a. avium of identical serotype, genotype and RFLP type F-C3 was isolated from C. vicina larvae on days 4 and 11 post infection (p.i.) and from L. sericata larvae on day 4 p.i.  Identical RFLP type B-C1 of M. a. paratuberculosis was isolated from adult C. vicina fed with artificially contaminated saccharose solution on day 2 p.i. Investigation of M. a. paratuberculosis distribution inside the adult C. vicina showed that the majority of Colony Forming Units (CFU) were isolated from the abdomen and head, fewer from the thorax and wings and none from the legs.  Larvae and adults may participate in spreading causal agents of mycobacterial infections and this fact should be considered during sanitation of infected herds and in slaughterhouses when materials from animals affected by mycobacterial infections are processed.
Descriptors:  cows, Calliphora vicina, Lucilia sericata, Lucilia caesar, blowflies, Mycobacterium avium subsp. avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium, Mycobacterium avium subsp. hominissuis, insect vectors, bacterial infection, pathogen identification, restriction fragment length polymorphism, tissue distribution, cows, hens, paratuberculosis, avian tuberculosis, chicken meat, pork, food contamination, disease transmission, Czech Republic.

Fredriksen, B.; Djonne, B.; Sigurdardottir, O.; Tharaldsen, J.; Nyberg, O.; Jarp, J.  Factors affecting the herd level of antibodies against Mycobacterium avium subspecies paratuberculosis in dairy cattle.  Veterinary Record.  2004; 154(17): 522-526.  ISSN: 0042-4900.
URL:  http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, dairy cattle, herd health, antibodies, variable factors.

Gardner, Richard A.; Ghobrial, George; Naser, Saleh A.; Phanstiel, Otto.  Synthesis and biological evaluation of new acinetoferrin homologues for use as iron transport probes in mycobacteria.  Journal of Medicinal Chemistry.  2004; 47(20): 4933-4940.  ISSN:  0022-2623.
URL:  http://pubs.acs.org/journals/jmcmar/index.html
NAL Call No.:  RS403.A1J6
Descriptors:  Mycobacterium avium subsp. paratuberculosis, iron transport, acinetoferrin, aminohydroxamic acid motif (2 equiv) to a tert-butyl citrate derivative homologues, generated two linear and two cyclic imide derivatives, growth stimulating behavior, DCC and N-hydroxysuccinimide, siderophore from Streptomyces pilosus, deferrioxamine B.

Ghadiali, A.H.; Strother, M.; Naser, S.A.; Manning, E.J.B.; Sreevatsan, S.  Mycobacterium avium subsp. paratuberculosis strains isolated from Crohn's disease patients and animal species exhibit similar polymorphic locus patterns.  Journal of Clinical Microbiology.  2004; 42(11): 5345-5348.  ISSN:  0095-1137.
URL:  http://jcm.asm.org/cgi/content/abstract/42/11/5345
NAL Call No.:  QR46.J6
Descriptors:  cattle, goats, humans, Mycobacterium avium subsp. paratuberculosis, Johne’s disease strains, Crohn’s disease strains, zoonotic disease strains, United States.

Glanemann, B.; Hoelzle, L.E.; Bogli-Stuber, K.; Jemmi, T.; Wittenbrink, M.M.  Detection of Mycobacterium avium subspecies paratuberculosis in Swiss dairy cattle by culture and serology.  Schweizer Archiv fuer Tierheilkunde.  2004; 146(9): 409-415.  ISSN:  0036-7281.
NAL Call No.:  41.8 SCH9
Descriptors:  186 dairy cows, 10 commercial herds, cattle antibody testing, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, culture techniques, diagnosis, diagnostic techniques, diagnostic value, ELISA, fecal sampling, immunodiagnosis, commercial ELISA with MAP lipoarabinomannan, paratuberculosis, serology, Switzerland.

Glawischnig, W.; Awad-Masalmeh, M.; Khaschabi, D.; Schonbauer, M.  Nachweis von Mycobacterium avium subsp. paratuberculosis im Hoden eines klinisch erkrankten Zuchtstiers.  [Detection of Mycobacterium avium subsp. paratuberculosis from the testicles of a clinically infected breed.]  Berliner und Munchener Tierarztliche Wochenschrift.  2004; 117(3/4): 136-139.  ISSN:  0005-9366.  Note:  In German with an English summary.
NAL Call No.:  41.8 B45
Descriptors:  Simmental bull, post mortem examination, severe Johne’s disease, Mycobacterium avium subsp. paratuberculosis, testicles sampled, no gross lesions, acid fast organisms found, cultured in mycostatin culture, PCR showed Mycobacterium avium subsp. paratuberculosis, indication of bacteremia in final stages, possible transfer with artificial insemination.

Goethe, R.  Mechanismen der Aktivierung und Deaktivierung von J774 Makrophagen durch Mycobacterium avium Subspezies paratuberculosis.  Mechanisms of activation and deactivation of J774 macrophages by Mycobacterium avium subsp. paratuberculosis.  2004; 151.  Note:  A thesis published by Tierarztliche Hochschule Hannover, Hannover, Germany.  In German.
Descriptors:  Mycobacterium avium subsp. paratuberculosis persistence in mononuclear phagocytes, role in pathogenesis of paratuberculosis in ruminants, murine macrophages J774, infection mechanism, mycobacterial phagosome establishment, signal cascades and transactivation of genes, cytokine mRNA expression was detected, particularly of the IL-6 gene, protein kinase C, phosphotyrosine kinases.

Granger, K.; Moore, R.J.; Davies, J.K.; Vaughan, J.A.; Stiles, P.L.; Stewart, D.J.; Tizard, M.L.V.  Recovery of Mycobacterium avium subspecies paratuberculosis from the natural host for the extraction and analysis in vivo-derived RNA.  Journal of Microbiological Methods.  2004; 57(2): 241-249.  ISSN:  0167-7012.
URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T30-4BYC4F5-1&_user=10&_handle=B-WA-A-A-AE-MsSAYVA-UUA-AUEAEVDCVW-AUYECWYBVW-CAUDDCYAC-AE-U&_fmt=summary&_coverDate=05%2F31%2F2004&_rdoc=11&_orig=browse&_srch=%23toc%234932%232004%23999429997%23491206!&_cdi=4932&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=695484d1a3d13c4638c1828f8ce80b07%20 Descriptors:  goats, classical signs of Johne’s, Mycobacterium avium subsp. paratuberculosis, small intestines removed, luminal contents washed, mucosa and submucosa harvested, insotonic lysis and differential centrifugation, RNA extracted, realtime PCR, katG mRNA, differential increased expression in in-vivo compared to in-vitro samples, stress of intra-macrophage environment.

Grant, I.R.; Rowe, M.T.  Effect of chemical decontamination and refrigerated storage on the isolation of Mycobacterium avium subsp. paratuberculosis from heat-treated milk.  Letters in Applied Microbiology.  2004; 38(4): 283-288.  ISSN:  0266-8254.
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=lam
NAL Call No.:  QR1.L47
Descriptors:  milk contaminated with Mycobacterium avium subsp. paratuberculosis, cold storage treatment, cetylpyridinium chloride treatment not recommended, pasteurization.

Grooms, D.  Johne's disease: A brief overview.  Proceedings / Tri-State Dairy Nutrition Conference.  2004; 41-46.  Note:  Conference held April 27-28, 2004, Fort Wayne, Indiana.
NAL Call No.:  SF203.T75
Descriptors:  dairy cows, beef cattle, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, symptoms, economic impacts, control, United States.

Hacker, U.; Huttner, K.; Konow, M.  Untersuchung zur serologischen Pravalenz und zu Risikofaktoren der Paratuberkulose in Milchviehbetrieben in Mecklenburg-Vorpommern.  [Investigation of serological prevalence and risk factors of paratuberculosis in dairy farms in the State of Mecklenburg-Westpommerania, Germany.]  Berliner und Munchener Tierarztliche Wochenschrift.  2004; 117(3/4): 140-144.  ISSN:  0005-9366.  Note:  In German with an English summary.  
NAL Call No.:  41.8 B45
Descriptors: dairy farms; 2997 serum samples; 59 pre-selected dairy farms, analyzed for antibodies against Mycobacterium avium subsp. paratuberculosis, Svanovir ELISA,  herd prevalence 12.2% , need for common program to control Johne’s disease in Germany, Mecklenburg-Pomerania, Germany.

Hammer, P.; Kiesner, C.; Walte, H.G.; Knappstein, K.; Teufel, P.  Heat resistance of Mycobacterium avium ssp. paratuberculosis in raw milk tested in a pilot-plant pasteurizer. Bulletin of the International Dairy Federation.  2004; (392): 53-61.  ISSN:  0250-5118.
NAL Call No.:  44.9 IN82B
Descriptors:  Mycobacterium avium subsp. paratuberculosis, bacterial contaminant in raw milk, inactivation by heat treatments, heat resistance, heat tolerance, pasteurization, pasteurizers, various heat combinations, experimental treatment with 5 treatments, factors influencing heat tolerance, cell clumps, phagocytosis, metabolic activity and heat activation.

Harp, J.A.; Stabel, J.R.; Pesch, B.A.; Goff, J.P.  Expression of adhesion molecules on milk and blood lymphocytes from periparturient dairy cattle with Johne's disease.  Veterinary Immunology and Immunopathology.  2004; 98(1/2): 69-76.  ISSN:  0165-2427.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776 NAL Call No.:  SF757.2.V38
Descriptors:  dairy cows, infected with Mycobacterium avium subsp. paratuberculosis, parturition, and up to 21 days post-partum, monitoring for T lymphocytes and expression of adhesion molecules on cell in blood and milk.

Harwood, D.  Diseases of dairy goats.  In Practice.  2004; 26(5): 248-259.  ISSN:  0263-841X.  
NAL Call No.:  SF601.I4
Descriptors:  dairy goats, common infectious diseases, differences with reference to common infectious diseases, other clinical conditions, endoparasites and breeding/fertility problems, species differences with reference to common infectious diseases, other clinical conditions, metabolic diseases, endoparasites and breeding/fertility problems, disease transmission, disease prevention, disease control, includes bacterial diseases, Mycobacterium avium subsp. paratuberculosis, Mycobacterium tuberculosis, United Kingdom.

Heeb, M.; Austerman, S.R.; Hall, J.; Evans, R.  Comparison of commercial ELISA tests for Johne's disease in beef cattle herds.  In:  Smith, R.A. [Editor]  Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, September 23-25, 2004.  Published by the Association.  2004; 300.  ISSN:  0743-0450.
NAL Call No.:  SF961.A5
Descriptors:  beef cattle, beef herds, epidemiology, testing for Mycobacterium avium subsp. paratuberculosis, disease prevalence, commercial ELISA kits, comparison study.

Hein, Wayne R; Barber, Ttessa; Cole, Sally Ann; Morrison, Lilian; Pernthaner, Anton.  Long-term collection and characterization of afferent lymph from the ovine small intestine.  Journal of Immunological Methods.  2004; 293(1-2): 153-168.  ISSN:  0022-1759.
URL: http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=4931&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=a9f24e1e7fcf9211e6517a50df2f26f4 NAL Call No.: QR180.J6
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, Trichostrongylus colubriformis, animal parasitic nematodes, animal disease models, experimental infections, host/parasite relationships, immune response, small intestine, lymph flow, methodology, paratuberculosis, Johne’s disease.

Hellberg, H.; Mork, T.  Overvakings- og kontrollprogrammene viser fortsatt god helse hos fisk, skjell og landdyr i Norge.  [Surveillance and control programmes show continued good health in fish, shellfish and farm animals in Norway.]  Norsk Veterinaertidsskrift.  2004; 116(10): 656-658.  ISSN:  0332-5741.  Note:  In Norwegian.  
Descriptors:  18 surveillance and control programs, farm animals, fish, shellfish, new scrapie Nor98, bovine diarrhea virus—1 case, swine influenza—1 case, avian rhinotracheitis—1 flock, Salmonella—2 cattle, 1 pigs, 1 poultry, 3 goats, paratuberculosis, Norway.

Hendrick, S.H.; Duffield, T.F.; Kelton, T.F.; Leslie, K.E.; Lissemore, L.K.D.; Archambault, M.  Risk factors for Johne's disease in Ontario dairy herds.  In:  Smith, R.A. [Editor]  Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, September 23-25, 2004.  Published by the Association.  2004; 204, 271.  Note:  In English and French.
NAL Call No.:  SF961.A5
Descriptors:  dairy cattle, dairy herds, Johne’s disease, Mycobacterium avium subsp. paratuberculosis disease prevalence, disease control, risk factors, Ontario, Canada.

Hillerton, J.E.  Control of MAP in milk.  Bulletin of the International Dairy Federation.  2004; (386): 17-19.  ISSN:  0250-5118.  
NAL Call No.: 44.9 IN82B
Descriptors:  cattle disease, Mycobacterium avium subsp. paratuberculosis, precautionary approach to control milk supply contaminates should be adopted, approaches necessary at farm level, Johne’s disease, Crohn’s disease.

Hirst, H.L.; Garry, F.B.; Morley, P.S.; Salman, M.D.; Dinsmore, R.P.; Wagner, B.A.; McSweeney, K.D.; Goodell, G.M.  Seroprevalence of Mycobacterium avium subsp paratuberculosis infection among dairy cows in Colorado and herd-level risk factors for seropositivity.  Journal of the American Veterinary Medical Association.  2004; 225(1): 97-101.  ISSN: 0003-1488.
URL:  http://www.avma.org/
NAL Call No.:  41.8 AM3
Descriptors:  Mycobacterium avium subsp. paratuberculosis, dairy cattle, herd risk factors, serum testing, disease incidence, Colorado.

Holmes, I.R.L.; Jubb, T.F.; Callinan, A.P.L.  Infection rates in reactors to an absorbed ELISA used in a test and cull program for bovine Johne's disease.  Australian Veterinary Journal.  2004; 82(4): 233-235.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  cattle, culling of diseased animals, Mycobacterium avium subsp. paratuberculosis, infection rates, testing program, absorbed ELISA diagnostic test.

Holzmann, C.B.; Jorge, M.C.; Traversa, M.J.; Schettino, D.M.; Medina, L.; Bernardelli, A.  Estudio del comportamiento epidemiologico de la paratuberculosis bovina mediante series cronologicas en Tandil, provincia de Buenos Aires,Argentina.  [A study of the epidemiological behavior of bovine paratuberculosis using time series in Tandil in the province of Buenos Aires, Argentina.]  Revue Scientifique et Technique Office International des Epizooties.  2004; 23(3): 791-799.  ISSN:  0253-1933.  Note:  In Spanish with summaries in English and French.
NAL Call No.:  SF781.R4
Descriptors:  cattle disease, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, time series data, clinical behavior of disease, diagnosis, macroscopic examination, ELISA, comparative tuberculin test, bacterial disease, epidemiology, Argentina.

Hruska, K.  Research on paratuberculosis: analysis of publications 1994-2004. Veterinarni Medicina.  2004; 49(8): 271-282.  ISSN:  0375-8427.  
URL:  http://vetmed.vri.cz/
NAL Call No.:  41.9 C333
Descriptors:  analysis of scientific literature on Mycobacterium avium subsp. paratuberculosis, papers, authors, institutional affiliations, journals, top 50 authors, top 50 institutions, top 50 most frequently cited articles, trends show significant increases in research, Web of Knowledge Results Analysis, OIE Reference Laboratory for Paratuberculosis.

Huda, A.; Jungersen, G.; Lind, P.  Longitudinal study of interferon-gamma, serum antibody and milk antibody responses in cattle infected with Mycobacterium avium subsp. paratuberculosis.  Veterinary Microbiology.  2004; 104(1-2): 43-53.  ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8 NAL Call No.:  SF601.V44
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, diagnosis diagnostic techniques, disease markers, antibodies, immune response, immunodiagnosis, interferon, lymphocytes, milk serum.

Humphry, R.W.; Cameron, A.; Gunn, G.J.  A practical approach to calculate sample size for herd prevalence surveys.  Preventive Veterinary Medicine.  2004; 65(3/4): 173-188.  ISSN:  0167-5877.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  cattle herd level prevalence testing, disease survey, bacterial pathogen, Mycobacterium avium subsp. paratuberculosis, imperfect diagnostic test, epidemiology, sampling sizes, mathematical models, benefits, costs, low numbers of herds, large number of animals per herd and exclusion of small herds, achieving high herd level sensitivity and specificity.

Hutchinson, L.J.; Weinstock, D.; Byler, L.I.  Case report - management of paratuberculosis in a dairy goat herd.  Bovine Practitioner.  2004; 38(2): 142-146.  ISSN:  0524-1685.  Note:  In English with a French summary.   
NAL Call No.:  SF779.5.A1B6
Descriptors:  mixed breed dairy goats, Mycobacterium avium subsp. paratuberculosis, serological screening for Johne’s, ELISA, agar gel immunodiffusion, AGID, positive animals removed, euthanized or sold for meat, necropsied, histopathology and tissues cultured, testing identified positive animals, recommended for management practices, United States.

Ibrahim, A.; El Sanousi, S.; Aradaib, I.  Detection of Mycobacterium avium subspecies paratuberculosis using nested polymerase chain reaction (nPCR).  Veterinarski Arhiv.  2004; 74(1): 27-35.  ISSN:  0372-5480.  Note:  In English with a Croatian summary.  
NAL Call No.:  41.8 V6416
Descriptors:  detection assay with increased sensitivity, Mycobacterium avium subsp. paratuberculosis, nested PCR, IS1311, 1st is a 549 bp PCR (P1, P2), 2nd set of primers (P3, P4) frn IS1311 for a 260bp PCR product, useful at early stages of the infection.

Ikonomopoulos, J.; Gazouli, M.; Pavlik, I.; Bartos, M.; Zacharatos, P.; Xylouri, E.; Papalambros, E.; Gorgoulis, V.  Comparative evaluation of PCR assays for the robust molecular detection of Mycobacterium avium subsp. paratuberculosis.  Journal of Microbiological Methods.  2004; 56(3): 315-321.  ISSN:  0167-7012.  
URL:  http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T30-4B5435C-2&_user=10&_handle=B-WA-A-A-AE-MsSAYVW-UUA-AUYZWVUUWZ-AUYBYWUYWZ-BECBEEAUE-AE-U&_fmt=summary&_coverDate=03%2F31%2F2004&_rdoc=2&_orig=browse&_srch=%23toc%234932%232004%23999439996%23480150!&_cdi=4932&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f3785c183ef03e76c99e976dfc93f1bc%20 NAL Call No.:  QR65.J68
Descriptors: detection of Mycobacterium avium subsp. paratuberculosis, molecular assay method with optimum performance and cost, high reproducibility, DNA extraction, PCR assays, one-tube nested, 2 two-tube nested, and a single PCR assay, targeted different genomic regions of IS900 element, tested various samples, pure bacterial cultures, formalin-fixed paraffin-embedded (FFPE) infected cattle tissue samples, chickens with M. avium subsp. avium, best assay was one-tube nested PCR assay combined with in-house DNA extraction, 3 laboratories collaborated, Czech Republic, Greece.

Irish Veterinary Association.  Report of the 40th winter scientific meeting of the Association of Veterinary Teachers and Research Workers (Irish region).  Irish Veterinary Journal.  2004; 57(2): 87-94.  ISSN:  0368-0762.
Descriptors:  report, list of animal diseases, livestock, pets, poultry, disease prevalence, pharmacokinetics, diagnostic techniques, many viral and bacterial diseases—transmissible spongiform encephalopathies, bovine herpesvirus 4, feline immunodeficiency virus, subclinical mastitis, Brucella abortus, E. coli, Neospora canium, Leptospira interrogans serovar Bratislava, Irish Republic.

Jessep, T.; Arnott, R.; Walker, B.  Supporting BJD zoning - guidelines for agents and saleyard operators.  Agnote NSW Agriculture.  2004; (DAI-323 (1st Edition)): 3.  ISSN:  1034-6848.
URL:  http://www.agric.nsw.gov.au/reader/newSearchResults.html?MIval=newSearchResults.html&action=search&websiteID=1&width=25&submitImg=%2Fi%2Fdpi%2Fsearch-button.gif&searchTerm=dai-323&submit=Search&x=34&y=8
Descriptors:  beef and dairy industries, bovine Johne’s disease, Mycobacterium avium subsp. paratuberculosis zoning in New South Wales, protected zone, control zone, role of agents and sale yard operators, disease prevention and control programs, guidelines, Australia.

Joardar, S.N.; Nasir, A.; Tewari, V.; Gupta, A.; Goswami, T.K.; Ram, G.C.  Cellular immunoreactivity of fractionated antigens of Mycobacterium paratuberculosis 316F.  Indian Journal of Animal Health.  2004; 43(2): 127-133.  ISSN:  0019-5057. 
NAL Call No.:  SF1.I4
Descriptors:  mice, guinea pigs, Mycobacterium avium subsp. paratuberculosis, cellular immune responses, live bacteria experimental infection, affinity purified antigens of Mycobacterium avium subsp. paratuberculosis 316F, fractions of protein antigens, e ConA bound fraction increased invitro T lymphocyte proliferation and higher NO2 production mouse splenic macrophages, guinea pigs showed less cross reaction to related mycobacteria, delayed type hyper-sensitivity.

Jubb, T.F.; Galvin, J.W.  Effect of a test and control program for Johne's disease in Victorian beef herds 1992-2002.  Australian Veterinary Journal.  2004; 82(3): 164-166.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  Mycobacterium avium subsp. paratuberculosis, beef cattle, herd health, testing and control programs, program evaluation, effectiveness, Victoria, Australia.

Jubb, T.F.; Galvin, J.W.  Effect of a test and control programme for bovine Johne's disease in Victorian dairy herds 1992-2002.  Australian Veterinary Journal.  2004; 82(4): 228-232.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  infected dairy herds, Mycobacterium avium subsp. paratuberculosis, Victorian Johne’s Disease Test and Control Programme, 542 dairy herds participated, testing of 2 year and older animals, ELISA, culling of reactors, minimize infection in younger animals, 680,000 tested, 10,000 reactors, statistics on the results of the programs presented, Victoria, Australia. 

Jubb, T.F.; Sergeant, E.S.G.; Callinan, A.P.L.; Galvin, J.W.  Estimate of the sensitivity of an ELISA used to detect Johne's disease in Victorian dairy cattle herds.  Australian Veterinary Journal.  2004; 82(9): 569-573.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  dairy herd, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, detection method assessment, ELISA, Victoria, Australia.

Kalis, C.H.J.; Collins, M.T.; Barkema, H.W.; Hesselink, J.W.  Certification of herds as free of Mycobacterium paratuberculosis infection: actual pooled faecal results versus certification model predictions.  Preventive Veterinary Medicine.  2004; 65(3-4): 189-204.  ISSN: 0167-5877
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f NAL Call No.:  SF601.P7
Descriptors:  dairy cattle, herd health monitoring, herd certification, Mycobacterium avium subsp. paratuberculosis, animal pathogenic bacteria, Johne’s disease, paratuberculosis, models, pooled feces, microbial detection, The Netherlands.

Kasravi, R.; Nowrouzian, I.  Clinical paratuberculosis as a cause for higher culling rate in cows with left displaced abomasum and diarrhoea in a Holstein dairy herd.  Journal of Veterinary Medicine Series B.  2004; 51(6): 302-303.  ISSN:  0931-1793.
URL:  http://www.blackwellpublishing.com/journal.asp?ref=0931-1793&site=1
NAL Call No.:  41.8 Z52
Descriptors:  Holstein cattle, left-displaced abomasums, diarrhea, clinical aspects, histopathology, diagnosed with Mycobacterium avium subsp. paratuberculosis, Johne’s disease, case reports, culling decisions.

Kasravi, R.; Nowrouzian, I.  Johne's disease as a probable cause for higher culling rate in cows with left displaced abomasum and diarrhea in a dairy herd in Iran.  In:  Smith, R.A. [Editor] Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, September 23-25, 2004.  Published by the Association.  2004; 304.  ISSN:  0743-0450.
NAL Call No.:  SF961.A5
Descriptors:  cattle, dairy cows, rate of culling of disease animals, abomasum displacement, diarrhea, probably Johne’s disease, Mycobacterium avium subsp. paratuberculosis, Iran.

Kataria, A.K.; Kataria, N.; Harsh, S.K.; Dadhich, H.; Lal Singh; Gahlot, A.K.  An outbreak of paratuberculosis complicated with schistosomosis in sheep.  Indian Journal of Animal Health.  2004; 43(2): 145-148.  ISSN:  0019-5057.  
NAL Call No.:  SF1.I4
Descriptors:  sheep, concurrent infections, outbreaks of schistosomiasis and Johne’s disease, Schistoma, Mycobacterium avium subsp. paratuberculosis, clinical signs, diagnosis, blood chemistry, diagnosis, disease prevalence, epidemiology, histopathology, mortality, high mortality, paratuberculosis, postmortem examinations, Rajasthan, India. 

Katayama, Nobuya; Shibata, Masashi; Suzuki, Takumi; Ootake, Masayoshi; Kamata, Shinichi; Yokomizo, Yuichi.  Effects of ammonia treatment under various conditions on viability of Mycobacterium avium subsp. paratuberculosis inoculated in low moisture roughage.  Nihon Sōchi Gakkai shi.  [Journal of Grassland Science].  2004; 50(3): 280-284.  ISSN:  0447-5933.
NAL Call No.:  60.9 J27
Descriptors:  low moisture roughage, ammonia treatment, Mycobacterium avium subsp. paratuberculosis, pathogen survival, animal feeds, laboratory scale experiment, NH4OH, filter paper of Mycobacterium avium subsp. paratuberculosis, temperature and humidity variations, time trial, disinfecting hay.

Katayama, N.; Suzuki, T.; Shibata, M.; Ootake, M.; Kamata, S.; Yokomizo, Y.  Influence of ultraviolet-B (UV-B) on viability of Mycobacterium avium subsp. paratuberculosis.  Nihon Sōchi Gakkai shi. [Journal of Grassland Science]. 2004; 50(4): 336-340.  ISSN:  0447-5933.  Note:  In English with a Japanese summary.  
NAL Call No.:  60.9 J27
Descriptors:  Mycobacterium avium subsp. paratuberculosis strains BBM2201 and ATCC19851, raw, dried suspensions in distilled water, diluted slurry, irradiated with UV-B at levels 2,4,8,17,34,136,271,543, 1085 kJ/m2, viability testing, differences in inactivation due to environment, homogenized feces, slurry, raw and dried leaves of corn (Zea mays), sorghum (Sorghum spp.), orchard grass (Dactylis glomerata), Italian ryegrass (Lolium multiflorum), red clover (Trifolium pratense) and tall fescue (Festuca arundinacea), bacterial survival in feces and fodder grass leaves can be long periods with exposure to sunlight.

Keller, L.L.; Rae, D.O.; Harrell, C.D.; Loerzel, S.M.  Johne's Disease: seroprevalence of Mycobacterium avium subsp. paratuberculosis in Florida beef and dairy cattle.  In:  Smith, R.A. [Editor] Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, September 23-25, 2004.  Published by the Association.  2004; 293.  ISSN:  0743-0450.
NAL Call No.:  SF961.A5
Descriptors:  beef cattle, dairy cattle, seroprevalence for antibodies, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, Florida, United States.

Khalifeh, M.S.; Stabel, J.R.  Effects of gamma interferon, interleukin-10, and transforming growth factor beta on the survival of Mycobacterium avium subsp. paratuberculosis in monocyte-derived macrophages from naturally infected cattle.  Infection and Immunity.  2004; 72(4): 1974-1982.  ISSN:  0019-9567.  
URL:  http://www.jarvm.com/
NAL Call No.:  QR1.I57
Descriptors:  cows, Mycobacterium avium subsp. paratuberculosis, immunoregulatory cytokines, interleukin-10,  immunity, in vivo and in vitro infection, effects on IFN gamma, TGF beta by peripheral blood mononuclear cells PBMC, gamma interferon macrophages, monocytes, paratuberculosis, survival, PBMCs from subclincally infected animals. 

Khalifeh, M.S.; Stabel, J.R.  Upregulation of transforming growth factor-beta and interleukin-10 in cows with clinical Johne's disease.  Veterinary Immunology and Immunopathology.  2004; 99(1/2): 39-46.  ISSN:  0165-2427.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776 NAL Call No.:  SF757.2.V38
Descriptors:  healthy, subclinically or clinically infected cows, clinical stage of Johne’s disease, Mycobacterium avium subsp. paratuberculosis, dynamics of host immune response, tissue sampling of ileum, ileocecal junction, ileocecal lymph node, mesenteric lymph nodes, expression of TGF-beta, IL-10, and IFN-gamma genes, quantitative competitive RT-PCR, TGF-beta and IL-10 mRNA are elevated in the clinical stage.

Khare, S.; Ficht, T.A.; Santos, R.L.; Romano, J.; Ficht, A.R.; Zhang, S.P.; Grant, I.R.; Libal, M.; Hunter, D.; Adams, L.G.  Rapid and sensitive detection of Mycobacterium avium subsp. paratuberculosis in bovine milk and feces by a combination of immunomagnetic bead separation-conventional PCR and real-time PCR.  Journal of Clinical Microbiology.  2004; 42(3): 1075-1081.  ISSN:  0095-1137.  
URL:   http://jcm.asm.org/cgi/content/full/42/3/1075
Descriptors:  Bison bison, buffalo, Mycobacterium avium subsp. paratuberculosis, detection, immunomagnetic bead separation, diagnostic techniques, DNA replication, fecal sampling, milk, nucleotide sequences, PCR.

Kim, S.G.; Kim, E.H.; Lafferty, C.J.; Miller, L.J.; Koo, H.J.; Stehman, S.M.; Shin, S.J.  Use of conventional and real-time polymerase chain reaction for confirmation of Mycobacterium avium subsp. paratuberculosis in a broth-based culture system ESP II.  Journal of Veterinary Diagnostic Investigation.  2004; 16(5): 448-453.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  ESP II Culture System, Mycobacterium avium subsp. paratuberculosis cultured from feces, realtime PCR assays, IS900 sequence, diagnostic techniques, detection methods.  

Koo, Hye Cheong; Park, Yong Ho; Hamilton, Mary Jo; Barrington, George M.; Davies, Christopher J.; Kim, Jong Bae; Dahl, John L.; Waters, W. Ray; Davis, William C.  Analysis of the immune response to Mycobacterium avium subsp. paratuberculosis in experimentally infected calves.  Infection and Immunity.  2004; 72(12): 6870-6883.  ISSN:  0019-9567.
URL:  http://www.jarvm.com/
NAL Call No.:  QR1.I57
Descriptors:  cattle, young animals, experimental infection, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, bacterial antigens, T lymphocytes, CD4+ lymphocytes, CD8+ lymphocytes, flow cytometry, immune response, immunity, cell proliferation.

Koo, Hye Cheong; Park, Yong Ho; Ahn, Jongsam; Waters, W. Ray; Hamilton, Mary Jo; Barrington, George; Mosaad, Abdelaziz A.; Palmer, Mitch V.; Shin, Sang; Davis, William C.  New latex bead agglutination assay for differential diagnosis of cattle infected with Mycobacterium bovis and Myobacterium avium subsp. paratuberculosis.  Clinical and Diagnostic Laboratory Immunology.  2004; 11(6): 1070-1074.  ISSN:  1556-6811.  URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=84.%20
Descriptors:  cattle, infected cows, assays, diagnosis, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, diagnostic techniques, differential diagnosis, ELISA, immunodominant epitope ESAT6-p, latex agglutination test, peptides, enzyme immuno assay. 

Kudahl, A.; Nielsen, S.S.; Sorensen, J.T.  Relationship between antibodies against Mycobacterium avium subsp. paratuberculosis in milk and shape of lactation curves.  Preventive Veterinary Medicine.  2004; 62(2): 119-134.  ISSN: 0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f NAL Call No.:  SF601.P7
Descriptors:  dairy cows, heifers, lactation, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, cattle diseases, ELISA, enzyme linked immunosorbent assay, lactation, milk yield, lactation curve, milk, optical properties, parity reproduction, lactation stage, mathematical models, antibody detection, antibodies, Denmark.

Kurade, N.P.; Tripathi, B.N.; Rajukumar, K.; Parihar, N.S.  Sequential development of histologic lesions and their relationship with bacterial isolation, fecal shedding, and immune responses during progressive stages of experimental infection of lambs with Mycobacterium avium subsp. paratuberculosis.  Veterinary Pathology.  2004; 41(4): 378-387.  ISSN:  0300-9858.
URL:  http://www.vetpathology.org/contents-by-date.0.shtml
NAL Call No.:  41.8 P27
Descriptors:  20 crossbred lambs, oral experimental infection with Mycobacterium avium subsp. paratuberculosis, infection stages 10-330 days post infection, diagnostic tests used, bacterial culture, lymphocyte stimulation test (LST), ELISA, locations and patterns of granulomatous lesions of intestines, intestinal lymphoid tissue, cellular infiltration, presence of acid fast bacilli, first establishes in lymphoid tissue of small intesting producing segmental lesions, the lamina propria and local lymph nodes, histopathology, Peyer’s patches.

Lambeth, C.; Reddacliff, L.A.; Windsor, P.; Abbott, K.A.; McGregor, H.; Whittington, R.J.  Intrauterine and transmammary transmission of Mycobacterium avium subsp paratuberculosis in sheep.  Australian Veterinary Journal.  2004; 82(8): 504-508.  ISSN: 0005-0423.  
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, disease transmission, in utero transmission, mammary glands, nursing milk transmission.

Lanigan, M.D.; Vaughan, J.A.; Shiell, B.J.; Beddome, G.J.; Michalski, W.P. Mycobacterial proteome extraction: comparison of disruption methods.  Proteomics.  2004; 4(4): 1094-1100.  ISSN:  1615-9853.
URL:  http://www3.interscience.wiley.com/cgi-bin/abstract/107629550/ABSTRACT
Descriptors:  Mycobacterium avium subsp. paratuberculosis, proteome extraction, comparison study, disruption methods, bead beating sonication, lysates, broad and narrow range 2 dimensional gel electrophoresis, similar results.

Lombard, J.E.; Hirst, H.L.; Antognoli, M.C.; Salman, M.D.; Garry, F.B.  Evaluation of diagnostic tests for Johne's disease using detection of Mycobacterium avium subsp. paratuberculosis in tissues to classify infection status of dairy cows.  In:  Smith, R.A. [Editor]  Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, September23-25, 2004.  Published by the Association.  2004; 205, 272-273.  ISSN:  0743-0450.  Note:  In English and French.
NAL Call No.:  SF961.A5
Descriptors:  dairy cattle, dairy cows, fecal sampling, diagnostic techniques for infection status, ELISA, postmortem examinations, histopathology.  

Lugton, I.W.  Cross-sectional study of risk factors for the clinical expression of ovine Johne's disease on New South Wales farms.  Australian Veterinary Journal.  2004; 82(6): 355-365.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, clinical level disease, cross sectional risk factors, New South Wales, Australia. 

Lugton, I.W.  Review of possible links between the clinical expression of paratuberculosis and deficiency of macro and micro-nutrients.  Australian Veterinary Journal.  2004; 82(8): 490-496.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, paratuberculosis, pathogenesis, clinical aspects, macro nutrients, micro nutrients, trace element deficiencies, copper, iron, selenium, molybdenum, nutrient balance, pastures, soil types, soil acidity, pH, liming, disease prevention, environmental factors, epidemiology, reviews.

Lutze-Wallace, C.; Chen, S.; Turcotte, C.  Laboratory diagnosis of bovine tuberculosis in Canada for calendar year 2003.  Canadian Veterinary Journal.  2004; 45(11): 915-916.  ISSN:  0008-5286.
URL:  http://www.pubmedcentral.nih.gov/tocrender.fcgi?action=archive&journal=202
NAL Call No.:  41.8 R3224
Descriptors:  bison, cattle, wild animals, zoo animals, Cervus elaphus Canadensis, fallow deer, white tailed deer, Odocoileus virginianus, pigs, tuberculosis, Mycobacterium, Mycobacterium avium, Mycobacterium avium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, Mycobacterium chelonae, Mycobacterium fortuitum, Mycobacterium marinum, Mycobacterium terrae, Mycobacterium xenopi, Mycobacterium flavescens, Mycobacterium gordonae, Mycobacterium triviale, disease prevalence, disease surveys, epidemiology, laboratory diagnosis, Alberta, Quebec, Ontario, Prince, Edward Island, Manitoba, Saskatchewan.

Machackova, M.; Svastova, P.; Lamka, J.; Parmova, I.; Liska, V.; Smolik, J.; Fischer, O.A.; Pavlik, I.  Paratuberculosis in farmed and free-living wild ruminants in the Czech Republic (1999-2001).  Veterinary Microbiology.  2004; 101(4): 225-234.  ISSN: 0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8 NAL Call No.:  SF601.V44
Descriptors:  paratuberculosis, Mycobacterium avium subsp. paratuberculosis, animal, pathogenic bacteria, disease vectors, wild animals, disease reservoirs, disease transmission, risk factors, Cervus dama, Capreolus capreolus, Mouflo, Cervus elaphus, game animals, livestock and meat industry, disease prevalence, disease diagnosis, restriction fragment length polymorphism, livestock, epidemiological surveys, farmed deer industry, game parks, Czech Republic.

Mackintosh, C.G.; de Lisle, G.W.; Collins, D.M.; Griffin, J.F.T.  Mycobacterial diseases of deer.  New Zealand Veterinary Journal.  2004; 52(4): 163-174.  ISSN:  0048-0169.
NAL Call No.:  41.8 N483
Descriptors:  deer, captive, farmed, wild, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, Mycobacterium bovis, culling for slaughter as control after skin and blood testing, movement control and vector control, factors affecting susceptibility—age, environment, population density, exposure to pathogens, and genetics, difficulty in diagnosing subspecies of Mycobacterium avium with specificity, New Zealand.

Martini, A.; Marconi, P.; Ponzetta, M.P.; Giorgetti, A.; Viliani, M.  Sanitary monitoring models for wild ungulate stock farms in Tuscany.  Veterinary Research Communications.  2005; 29(Suppl. 2): 77-82.  ISSN:  0165-7380.  
URL:  http://www.kluweronline.com/issn/0165-7380/contents
NAL Call No.:  SF601.V38
Descriptors:  farmed game animals, red deer, Cervus elaphus, fallow deer, wild pigs, Sus scrofa, animal diseases, disease prevalence, disease surveys, seroprevalence, etiology, animal pathogens, clinical aspects, diagnosis, antibodies, postmortem examinations, microbial contamination of feeds, sanitation, Mycobacterium avium subsp. paratuberculosis, ascaridiosis, coccidiosis, leptospirosis, parasitoses, Johne’s disease, paratuberculosis, trichuriasis, Acanthocephala, Aujeszky virus, bovine herpesvirus 1, encephalomyocarditis virus, Leptospira interrogans serovar Bratislava, Nematoda, Protozoa, Yersinia enterocolitica, Tuscany, Italy.

Matlova, L.; Dvorska, L.; Bartos, M.; Docekal, J.; Trckova, M.; Pavlik, I.  Tuberculous lesions in pig lymph nodes caused by kaolin fed as a supplement.  Veterinarni Medicina.  2004; 49(10): 379-388.  ISSN:  0375-8427.
URL:  http://vetmed.vri.cz/
NAL Call No.: 41.9 C333
Descriptors:  slaughtered pigs, 2 farms, tuberculous lesions, head, mesenteric lymph nodes, sources of infection, piglets feed contaminated kaolin as a supplement, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. hominissuis, Mycobacterium fortuitum, kaolin contaminated by surface water used in levigation, Czech Republic.

McClure, P.; Stewart, C.; Collins, M.; Condron, R.; Dumon, I.; Eberhard, P.; Grant, I.; Komorowski, E.; Lodi, R.; Paris, M.; Snyder, D.; Tomasula, P.; Varga, F.; Zecconi, A.  Working Group 2: Experimental designs.  Bulletin of the International Dairy Federation.  2004; (392): 120-123.  ISSN:  0250-5118.
NAL Call No.:  44.9 IN82B
Descriptors:  Mycobacterium avium subsp. paratuberculosis, experimental contamination of milk, experimental design, heating methodologies, decontamination procedures, pasteurization. 

McConnel, C.S.; Churchill, R.C.; Richard, M.M.; Corkhill, C.M.; Reddacliff, L.A.; Whittington, R.J.  Surgical method for biopsy of terminal ileum and mesenteric lymph node of sheep for detection of Mycobacterium avium subsp paratuberculosis.  Australian Veterinary Journal.  2004; 82(3):149-151.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, bacterial detection, surgical method, intestinal biopsy, ileum, mesenteric lymph node.

McKenna, S.L.B.; Keefe, G.P.; Barkema, H.W.; McClure, J.; Van Leeuwen, J.A.; Hanna, P.; Sockett, D.C.  Cow-level prevalence of paratuberculosis in culled dairy cows in Atlantic Canada and Maine.  Journal of Dairy Science.  2004; 87(11): 3770-3777.  ISSN: 0022-0302.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Descriptors:  dairy cows, culling animals, Mycobacterium avium subsp. paratuberculosis, disease prevalence, body condition scoring, disease detection, New Brunswick, Nova Scotia. Prince Edward Island, Newfoundland, Maine.

Mendes, S.; Boinas, F.; Albuquerque, T.; Fernandes, L.; Afonso, A.; Amado, A.  Epidemiological studies on paratuberculosis in small ruminants in Portugal.  Epidemiologie et Sante Animale. 2004; (45): 61-71.  ISSN:  0754-2186.  Note:  In English with a French summary.  
Descriptors:  66 sheep and goat flocks, seropositive testing of Johne’s, Mycobacterium avium subsp. paratuberculosis, high incidence in milk versus meat producers, intestinal lesions, disease prevention and control measures, Lisbon, Portugal.

Miciora, R.  Boala Crohn etiologie controversata.  [Crohn's disease - controversial etiology.]  Revista Romana de Medicina Veterinara.  2004; 14(1): 37-44.  ISSN:  1220-3173.  Note:  In Romanian with an English summary.
Descriptors:  humans, cattle, Johne’s disease, Crohn’s disease, etiology, clinical aspects, disease transmission, zoonotic disease, Mycobacterium avium subsp. paratuberculosis.  

Mortensen, H.; Nielsen, S.S.; Berg, P.  Genetic variation and heritability of the antibody response to Mycobacterium avium subspecies paratuberculosis in Danish Holstein cows.  Journal of Dairy Science.  2004; 87(7): 2108-2113.  ISSN: 0022-0302.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Abstract:  The purpose of this study was to estimate the genetic variation and the heritability of the ability to establish an immune response by producing antibodies to Mycobacterium avium subsp. paratuberculosis.  Antibody levels were determined using an ELISA and measuring optical density (OD) values from milk samples of 11,535 cows from 99 herds.  The pedigree of the 11,535 cows and information about days in milk, parity, milk yield, and others were obtained from the Danish Cattle database.  The statistical analyses were made using a bivariate mixed animal model.  The bivariate model with daily milk yield and OD as dependent variables showed a significant heritability of the ability to produce Mycobacterium avium subsp. paratuberculosis antibodies of 0.102 (genetic variance = 0.054) and a nonsignificant genetic correlation of -0.037 between daily milk yield and OD.  When a sire model was used, the estimated heritability was 0.091.  To evaluate whether intrauterine infection could be reflected in the OD, variation among 2715 dam-daughter or maternal sister groups was also estimated.  Variation in this data was nonsignificant, possibly because only very few clinical cases or end-stage cows, i.e., heavy bacterial shedders may have been represented among the cows sampled.  It does not appear that intrauterine transmission is of major importance in the transmission of paratuberculosis.
Descriptors:  dairy cows, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, antibody formation, genetic resistance, disease resistance, heritability, immunoglobulin G, gene expression, milk yield, animal age, calving, genotype, genetic variation, genetic correlation, Denmark.  

Motiwala, A.S.; Amonsin, A.; Strother, M.; Manning, E.J.B.; Kapur, V.; Sreevatsan, S.  Molecular epidemiology of Mycobacterium avium subsp. paratuberculosis isolates recovered from wild animal species.  Journal of Clinical Microbiology.  2004; 42(4): 1703-1712.  ISSN:  0095-1137.
URL:  http://jcm.asm.org/cgi/content/full/42/4/1703
Descriptors:  wild animal species, Mycobacterium avium subsp. paratuberculosis isolates, molecular epidemiology, alleles, genetic markers, loci, molecular epidemiology, PCR, United States.

Muhlherr, J.; Stephan, R.  Mikrobiologische Qualitat von roher Ziegen- und Schafmilch in der Schweiz.  [The microbiological quality of raw goat and ewe milk in Switzerland.]  Forum Kleinwiederkauer/Petits Ruminants.  2004; (1/2): 6-15.  Note:  In German and French.
Descriptors:  goat milk, ewe milk, 344 goat herds, 63 sheep flocks, average bacterial count, incidence of enterobacteria, Staphylococcus aureus, Salmonella, Campylobacter, E. coli, Mycobacterium avium subsp. paratuberculosis, Switzerland.

Munjal, S K.; Boehmer, J.; Beyerbach, M.; Strutzberg-Minder, K.; Homuth, M.  Evaluation of a LAM ELISA for diagnosis of paratuberculosis in sheep and goats.  Veterinary Microbiology.  2004; 103(1-2): 107-114.  ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8 NAL Call No.:  SF601.V44
Descriptors:  goats, sheep, Mycobacterium avium subsp. paratuberculosis, lipoarabinomanan (LAM) antigen, blood serum, milk samples, diagnosis, diagnostic techniques, ELISA, immunodiagnosis, immunodiffusion, immunological techniques, lymph nodes, paratuberculosis, PCR.

NSW Department of Primary Industires, OJD prevalence areas.  OJD prevalence areas.  2004; 1.
URL:  http://www.agric.nsw.gov.au/reader/ojd-prevalence-areas
Descriptors:  sheep, ovine Johne’s disease, prevalence of disease, area maps, surveillance data, 2 year collection period, Australia.

Naugle, A.L.; Saville, W.J.A.; Shulaw, W.P.; Wittum, T.E.; Love, B.C.; Dodaro, S.J.; McPhail, I.L.  Comparison of management practices between Ohio, USA dairy farms participating in whole-herd Johne's disease testing programs and those not participating.  Preventive Veterinary Medicine.  2004; 65(1-2): 77-92.  ISSN: 0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f NAL Call No.:  SF601.P7
Descriptors:  dairy farms, herd health, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, comparison of herd management practices, testers and non-testers, Ohio, United States.

Nielsen, S.S.; Kolmos, B.; Christoffersen, A.B.  Comparison of contamination and growth of Mycobacterium avium subsp. paratuberculosis on two different media.  Journal of Applied Microbiology.  2004; 96(1): 149-153.  ISSN:  1364-5072.
URL:  http://www.blackwellpublishing.com/journal.asp?ref=1364-5072
Descriptors:  Mycobacterium avium subsp. paratuberculosis, comparison study, growth and degree of contamination, Herrold’s egg yolk medium (HEYM) and modified Lowenstein-Jensen medium, culture of 2513 fecal sample from dairy cows, read at 5, 8 and 12 weeks, HEYM was better growth medium.

Olsen, I.; Johansen, T.B.; Billman-Jacobe, H.; Nilsen, S.F.; Djonne, B.  A novel IS element, ISMpa1, in Mycobacterium avium subsp. paratuberculosis.  Veterinary Microbiology.  2004; 98(3/4): 297-306.  ISSN:  0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8%20 NAL Call No.:  SF601.V44
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium, Mycobacterium avium subsp. avium, IS110 family, ISMpal of 1500 bp and 1 ORE encoding a putative transposase, detected in 11 Mycobacterium avium subsp. paratuberculosis strains but not in most other Mycobacterium strains examined including 10 Mycobacterium avium subsp. avium isolates of human, avian and porcine origins, 2 porcine Mycobacterium avium subsp. avium isolates and reference strain IWGMT49 did have ISMpa1, other molecular information explored, potentially useful to differentiate strains when used with IS900, cytochrome P-450, open reading frames, oxygenases, transposable elements.

O'Mahony, Jim; Hill, Colin.  Rapid real-time PCR assay for detection and quantitation of Mycobacterium avium subsp. paratuberculosis DNA in artificially contaminated milk.  Applied and Environmental Microbiology.  2004; 70(8): 4561-4568.  ISSN:  0099-2240.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=83
NAL Call No.:  448.3 AP5
Descriptors:  Mycobacterium avium subsp. paratuberculosis, spiked milk, PCR based rapid detection assay, primers, probes, IS900, highly sensitive, reproducible, DNA isolation method, 3 hr time period.  

Parimal Roy; Edwin, P.G.; Vajiravel-Jayakumar; Hemalatha, S.; Purushothaman, V.  An outbreak of Johne's disease among sheep in an organized farm.  Indian Journal of Animal Sciences.  2004; 74(11): 1118-1119.  
NAL Call No.:  41.8 IN22
Descriptors:  sheep, Johne’s disease diagnosed, rectal pinch and lymph samples, antibody detection via AGID tests, Mycobacterium avium subsp. paratuberculosis, case report, clinical aspects, diagnosis, Tamil Nadu, India.

Paustian, M.L.; Amonsin, A.; Kapur, V.; Bannantine, J.P.  Characterization of novel coding sequences specific to Mycobacterium avium subsp. paratuberculosis: implications for diagnosis of Johne's Disease.  Journal of Clinical Microbiology.  2004; 42(6): 2675-2681.  ISSN:  0095-1137.
URL:  http://jcm.asm.org/cgi/content/full/42/6/2675
Descriptors:  rabbits, mice, cattle, Johne’s disease, Mycobacterium avium complex, Mycobacterium avium subsp. paratuberculosis, subspecies differentiation, sera testing from infected animals, diagnostic techniques, recombinant proteins, potential for diagnostic gene sequences, PCR, open reading frames, paratuberculosis.

Pavlik, I.; Jahn, P.; Dvorska, L.; Bartos, M.; Novotny, L.; Halouzka, R.  Mycobacterial infections in horses: a review of the literature.  Veterinarni Medicina.  2004; 49(11): 427-440.  ISSN:  0375-8427.  Note:  Literature review.
URL:  http://vetmed.vri.cz/
NAL Call No.:  41.9 C333
Descriptors:  horses, Mycobacterium tuberculosis, Mycobacterium avium complex, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, Mycobacterium chelonae, Mycobacterium fortuitum, Mycobacterium smegmatis, Mycobacterium terrae, Mycobacterium africanum, Mycobacterium microti, disease prevalence, disease transmission, disease reservoir, epidemiology, atypical course of infection, clinical aspects, diagnostic techniques, histopathology, molecular genetics, risk factors, zoonoses.

Pearce, L.E.; Truong, H.T.; Crawford, R.A.; de Lisle, G.W.  Kinetic studies on the heat inactivation of Mycobacterium avium subsp. paratuberculosis (MAP) during turbulent-flow pasteurization.  Bulletin of the International Dairy Federation.  2004; (392): 49-52.  ISSN:  0250-5118.  
NAL Call No.:  44.9 IN82B
Descriptors:  treatment of milk contaminated with Mycobacterium avium subsp. paratuberculosis, raw milk, milk spiked with fecal material from Johne’s positive animal, different pathogenic strains, heat tolerance, heat treatment, pasteurization, pasteurizers, kinetics, strains, 9 temperature treatments, susceptibility, UHT milk.

Pence, M.; Thomson, J.U.; Cole, D.  Important elements of the HACCP process to control Johne's disease, bovine viral diarrhoea virus (BVDV, and bovine leukaemia virus (BLV).  Bovine Practitioner.  2004; 38(2): 126-132.  ISSN:  0524-1685.  Note:  In English with a French summary.  
NAL Call No.:  SF779.5.A1B6
Descriptors:  cattle diseases control programs, HACCP, bovine diarrhea virus, bovine leukemia virus, Mycobacterium avium subsp. paratuberculosis, adaptable for on farm production problems, disease risk, critical control points for a specific disease, leads to best practices, corrective action when needed, meat and milk production.

Picoux, J.B.; Maillard, R.; Douart, A.  Studio clinico della paratubercolosi bovina.  [Clinical study of bovine paratuberculosis.]  Summa.  2004; 21(6): 23-26.  Note:  In Italian.  Review article.
Descriptors:  cattle disease, Mycobacterium avium subsp. paratuberculosis, clinical picture, diagnosis, pathology.

Pouillot, Regis; Dufour, Barbara; Durand, Benoit.  A deterministic and stochastic simulation model for intra-herd paratuberculosis transmission.  Veterinary Research.  2004; 35(1): 53-68.  ISSN:  0928-4249.  
NAL Call No.:  SF602.A5
Descriptors:  cattle herds, Mycobacterium avium subsp. paratuberculosis, herd level certification procedure, cost/benefit analysis, deterministic and stochastic simulation model for intra-herd transmission, economic impact, single infected heifer, model difficult to validate.

Raizman, E.A.; Wells, S.J.; Jordan, P.A.  Can Mycobacterium avium subspecies paratuberculosis be transmitted from cattle to deer and rabbits, and vice versa?  In:  Smith, R.A. [Editor] Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, September 23-25, 2004.  Published by the Association.  2004; 206-207, 273-274.  ISSN:  0743-0450.  Note:  In English and French.
NAL Call No.:  SF961.A5
Descriptors:  dairy cattle, wild deer, wild rabbits, dairy farms, Mycobacterium avium subsp. paratuberculosis, disease prevalence, disease transmission, wild animal feces as reservoirs, Minnesota, United States.

Raizman, E.A.; Wells, S.J.  Distribution of Mycobacterium avium paratuberculosis in Minnesota dairy farms using bacterial culture of fecal pools.  In:  Smith, R.A. [Editor]  Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, September 23-25, 2004.  Published by the Association.  2004; 203, 270.  ISSN:  0743-0450.  Note:  In English and French.
NAL Call No.:  SF961.A5
Descriptors:  dairy farms, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, disease prevalence, pooled fecal sampling, ELISA, Minnesota, United States

Raizman, E.A.; Wells, S.J.; Godden, S.M.; Bey, R.F.; Oakes, M.J.; Bentley, D.C.; Olsen, K.E.  The distribution of Mycobacterium avium ssp. paratuberculosis in the environment surrounding Minnesota dairy farms.  Journal of Dairy Science.  2004; 87(9): 2959-2966.  ISSN:  0022-0302.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Descriptors:  dairy farms, 208 dairy herds, environmental reservoir, Mycobacterium avium subsp. paratuberculosis, fecal sampling, 5 cow pools, cow alley ways, manure storage, calving area, sick cow pen, water runoff, postweaned calves areas, alternative screening areas, Minnesota.

Raizman, E.A.; Wells, S.J.; Godden, S.M.; Bey, R.F.; Oakes, M.J.; Bentley, D.C.; Olsen, K. E.  Use of environmental sampling as a herd screening diagnostic tool for the detection of Mycobacterium avium subsp. paratuberculosis on Minnesota dairy farms.  In:  Smith, R.A. [Editor]  Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, September 23-25, 2004.  Published by the Association.  2004; 199-200, 265-266.  ISSN:  0743-0450.  Note:  In English and French.
NAL Call No.:  SF961.A5
Descriptors:  dairy cows, herd health screening, environmental sampling, disease prevalence, diagnostic approach for Mycobacterium avium subsp. paratuberculosis, disease detection, Minnesota, United States.

Reddacliff, L.A.; McGregor, H.; Abbott, K.; Whittington, R.J.  Field evaluation of tracer sheep for the detection of early natural infection with Mycobacterium avium subsp. paratuberculosis.  Australian Veterinary Journal.  2004; 82(7): 426-433.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  tracer sheep, sentinels for natural infection, field trial, early detection, Mycobacterium avium subsp. paratuberculosis, Australia.

Reddacliff, L.A.; McClure, S.J.; Whittington, R.J.  Immunoperoxidase studies of cell mediated immune effector cell populations in early Mycobacterium avium subsp. paratuberculosis infection in sheep.  Veterinary Immunology and Immunopathology.  2004; 97(3/4): 149-162.  ISSN:  0165-2427.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776 NAL Call No.:  SF757.2.V38
Descriptors:  sheep, lambs, Mycobacterium avium subsp. paratuberculosis, experimental infection, Peyer’s patches, lymph nodes, antibodies, cell mediated immunity, immunoperoxidase technique, lysozyme.

Robbe-Austerman, S.; Thomson, J.U.; Pence, M.; Smith, P.  Survey of veterinarians and producers on Johne's disease in Iowa cattle.  Journal of Applied Research in Veterinary Medicine.  2004; 2(4): 235-251.  ISSN:  1542-2666.
URL:  http://www.jarvm.com/
Descriptors:  cattle, Johne’s disease control program of Iowa, cattle veterinarians, cattle producers, diagnosis, survey state, need for continuing eduation, use and interpretation of diagnostic test, disease control program, potential support for a United States Federal control program, vaccination, results of survey, Iowa, United States.

Rodriguez-Lazaro, David; Lloyd, Joy; Herrewegh, Arnold; Ikonomopoulos, John; D'Agostino, Martin; Pla, Maria; Cook, Nigel.  A molecular beacon-based real-time NASBA assay for detection of Mycobacterium avium subsp. paratuberculosis in water and milk.  FEMS Microbiology Letters.  2004; 237(1): 119-126.  ISSN:  0378-1097.
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=fml
NAL Call No.:  QR1.F44
Descriptors:  Mycobacterium avium subsp. paratuberculosis, assays, water, milk, strain detection methods, gene amplification, gene sequences, isolates.

Rodriguez-Lazaro, D.; D'Agostino, M.; Pla, M.; Cook, N.  Construction strategy for an internal amplification control for real-time diagnostic assays using nucleic acid sequence-based amplification: development and clinical application.  Journal of Clinical Microbiology.  2004; 42(12): 5832-5836.  ISSN:  0095-1137.
URL:   http://jcm.asm.org/cgi/content/abstract/42/12/5832
Descriptors:  Mycobacterium avium subsp. paratuberculosis, diagnostic assay techniques, DNA amplification, RNA amplification, internal amplification control (IAC), molecular beacon-based real time nucleic acid sequence-based amplification (NASBA) assays.  

Roy, Parimal; Edwin, Prabakher G.; Jayakumar, Vajiravel; Hemalatha, S; Purushothaman, V.  An outbreak of Johne's disease among sheep in an organized farm.  Indian Journal of Animal Sciences.  2004; 74(11): 1118-1119.  ISSN:  0367-8318.
NAL Call No.:  41.8 IN22
Descriptors:  sheep, Johne's disease, ovine paratuberculosis, epidemiology, diagnosis, etiology, chronic granulomatous enteritis, pathology, mortality, India.  

Secott, T.E.; Lin, T.L.; Wu, C.C.  Mycobactetium avium subsp. paratuberculosis fibronectin attachment protein facilitates M-cell targeting and invasion through a fibronectin bridge with host integrins.  Infection and Immunity.  2004; 72(7): 3724-3732.  ISSN:  0019-9567.
URL:  http://iai.asm.org/cgi/content/abstract/72/7/3724
NAL Call No.:  QR1.I57
Descriptors:  mice, rats, animal model, antibodies, experimental infections, fibronectins, intestines, pathogenesis, peptides Peyer patches, proteins, murine gut loops, formation fibronectin bridge formed between FAP-P of Mycobacterium avium subsp. paratuberculosis and integrins on M cells.

Semret, M.; Zhai, G.; Mostowy, S.; Cleto, C.; Alexander, D.; Cangelosi, G.; Cousins, D.; Collins, D.M.; van Soolingen, D.; Behr, M.A.  Extensive genomic polymorphism within Mycobacterium avium.  Journal of Bacteriology.  2004; 186(18): 6332-6334.  ISSN:  0021-9193.  
URL:  http://jb.asm.org/cgi/content/abstract/186/18/6332
NAL Call No.:  448.3 J82
Descriptors:  Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, 14 large sequence polymorphisms, comparative genomic analysis, mycobactin biosynthesis operons, siderophores.

Shin, S.J.; Yoo HanSang; McDonough, S.P.; Chang, Y.F.  Comparative antibody response of five recombinant antigens in relation to bacterial shedding levels and development of serological diagnosis based on 35 kDa antigen for Mycobacterium avium subsp. paratuberculosis.  Journal of Veterinary Science.  2004; 5(2): 111-117.  ISSN:  1229-845X.
URL:  http://www.vetsci.org/
NAL Call No.:  SF604.J68
Descriptors:  cows with different shedding rates of Mycobacterium avium subsp. paratuberculosis, cloned eighty five complex (85A, 85B and 85C) 35 kDa antigen, superoxide dismutase (SOD), antigens in ELISA, serological reactivity, curve analysis, usefulness as a diagnostic agent.

Shin, S.J.; Chang, Y.F.; Huang, C.; Zhu, J.Q.; Huang, L.; Yoo HanSang; Shin, K.S.; Stehman, S.; Shin, S.J.; Torres, A.  Development of a polymerase chain reaction test to confirm Mycobacterium avium subsp. paratuberculosis in culture.  Journal of Veterinary Diagnostic Investigation.  2004; 16(2): 116-120.  ISSN:  1040-6387.   
NAL Call No.:  SF774.J68
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, detection assay, PCR, primer set from ISMav2, description of the primer, diagnostic value, no amplification of 494 bp DNA fragment detected in 11 bacterial species, Mycobacterium spp., Mycobacterium avium subsp., Escherichia coli, Pseudomonas aeruginosa, Actinobacillus pleruopneumonias, Lepsospira interrogans serovar Pomona, Corynebacterium pseudotuberculosis, Salmonella typhimurium, Borrelia burgdorferi, Staphylococcus aureus, Scedosporium sp.

Siguroardottir, Olof G.; Valheim, Mette; Press, Charles McL.  Establishment of Mycobacterium avium subsp. paratuberculosis infection in the intestine of ruminants.  Advanced Drug Delivery Reviews.  2004; 56(6): 819-834.  ISSN:  0169-409X.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=4953&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=e38c212aafd26b014558ba729b28a4f1 Descriptors:  ruminants, Mycobacterium avium subsp. paratuberculosis, infection, intestines, complement receptor 3.

Singh, B.B.; Gumber, S.; Randhawa, S.S.; Aradhana; Dhand, N.K.  Prevalence of bovine tuberculosis and paratuberculosis in Punjab.  Indian Veterinary Journal.  2004; 81(11): 1195-1196.  ISSN:  0019-6479.
NAL Call No.:  41.8 IN2
Descriptors:  251 cows, 376 buffaloes, intradermal test, Johne’s, disease, tuberculosis, Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis, incidence of disease, sex differences, species differences, Punjab, India.

Singh, B.B.; Sharma, S.; Kumar, H.; Dhand, N.K.  Surveillance of diseases in organized dairy farms of Punjab.  Journal of Research, Punjab Agricultural University.  2004; 41(4): 490-494.  ISSN:  0048-6019.
NAL Call No.:  S19.P8
Descriptors:  3 dairy cattle farms, animal health monitoring, repeat breeders, reproductive disorders, anestrus, cattle diseases, parasites, disease surveillance, epidemiology, disease prevention and control, abortion, etiology, babesiosis, bovine mastitis, brucellosis, paratuberculosis, theileriosis, trypanosomiasis, tuberculosis, Babesia, bovine herpesvirus 1, Brucella, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, Theileria, Trypanosoma, vaccination, Punjab, India.

Singh, S.V.; Vihan, V.S.  Detection of Mycobacterium avium subspecies paratuberculosis in goat milk.  Small Ruminant Research.  2004; 54(3): 231-235.  ISSN: 0921-4488.
NAL Call No.:  SF380.I52
Descriptors:  Mycobacterium avium subsp. paratuberculosis, paratuberculosis, goats, raw goat milk, goat diseases, disease detection, food pathogens, bacterial contamination, food contamination, foodborne infections, Uttar Pradesh, India. 

Sreedevi,B.; Krishnappa, G.  Standardization of polymerase chain reaction for the detection of Mycobacterium tuberculosis complex organisms from bovines.  Indian Journal of Animal Sciences.  2004; 74(11): 1120-1123.  ISSN:  0367-8318.  
NAL Call No.:  41.8 IN22
Descriptors:  cattle, intradermal tuberculin test positive, biopsy of prescapular lymph nodes, culture of isolates, Mycobacterium tuberculosis, Mycobacterium bovis complex, differential diagnosis, PCR IS6110, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, Mycobacterium bovis BCG strain, Mycobacterium phlei.

Stabel, J.R.; Bosworth, T.L.; Kirkbride, T.A.; Forde, R.L.; Whitlock, R.H.  A simple, rapid, and effective method for the extraction of Mycobacterium paratuberculosis DNA from fecal samples for polymerase chain reaction.  Journal of Veterinary Diagnostic Investigation.  2004; 16(1): 22-30.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  subclinical and clinically infected animals, Mycobacterium avium subsp. paratuberculosis, fecal culture single diagnostic test for both clinical states, DNA extraction from fecal samples and modification of PCR assay for optimal sensitivity, method can detect animals shedding less than 1 cfu/g.

Stabel, J.R.; Hurd, S.; Calvente, L.; Rosenbusch, R.F.  Destruction of Mycobacterium paratuberculosis, Salmonella spp., and Mycoplasma spp. in raw milk by a commercial on-farm high-temperature, short-time pasteurizer.  Journal of Dairy Science.  2004; 87(7): 2177-2183.  ISSN: 0022-0302.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Abstract:  The 2002 NAHM's Dairy Survey indicated that 87.2% of dairy farms in the United States feed waste milk to their neonatal calves.  Although cost-effective, this practice can lead to increased calf morbidity and mortality due to ingestion of pathogenic agents.  In an effort to reduce the risk of infection, dairy producers are implementing on-farm pasteurization of the waste milk as a control procedure before feeding the milk to calves.  In the present study, the efficacy of a commercial high-temperature, short-time (HTST) on-farm pasteurizer unit to destroy Mycobacterium paratuberculosis, Salmonella enterica spp., and Mycoplasma spp. in raw milk was evaluated.  Replicate experiments were run for 3 isolates of M. paratuberculosis, 3 serovars of Salmonella (derby, dublin, typhimurium); and 4 species of Mycoplasma (bovis, californicum, canadense, serogroup 7) at 2 different levels of experimental inoculation. In addition, HTST pasteurization experiments were performed on colostrum experimentally inoculated with M. paratuberculosis.  After culture of the pasteurized milk samples, no viable M. paratuberculosis, Salmonella, or Mycoplasma were recovered, regardless of species, strain, or isolate.  Pasteurization of colostrum was also effective in the destruction of M. paratuberculosis but resulted in an average 25% reduction in colostral immunoglobulin.  These results suggest that HTST pasteurization is effective in generating a safer product to feed to young calves.
Descriptors:  calves, neonates, safer calf feeding, feeds, cattle microbial diseases, disease transmission, efficacy of short time pasteurization, high temperature, raw milk treatment, cow colostrums, immunoglobulin G., Mycobacterium avium subsp. paratuberculosis, Salmonella enterica, various Mycoplasma species, plate count, feed processing technology.  

Stabel, J.R.; Goff, J.P.  Efficacy of immunologic assays for the detection of Johne's disease in dairy cows fed additional energy during the periparturient period.  Journal of Veterinary Diagnostic Investigation.  2004; 16(5): 412-420.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  dairy cows, postparturient period, immunosuppression effect on diagnostic tests for Johne’s, detection, energy balance, experimental nutrition study, rumen cannulas, ad libitum goup and forced additional manual feeding, parturition effects on immunity, immunoassay, immunoglobulins, immunosuppression, effects on response to diagnostic tests for paratuberculosis.

Stabel, J.R.; Lambertz, A.  Efficacy of pasteurization conditions for the inactivation of Mycobacterium avium subsp. paratuberculosis in milk.  Journal of Food Protection.  2004; 67(12): 2719-2726.  ISSN: 0362-028X.
NAL Call No.:  44.8 J824
Descriptors:  food preservation, raw milk, pasteurization, UHT treatment, UHT milk, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, risk reduction, Crohn’s disease.

Sternberg, S.; Lindberg, A.; Englund, S.  Paratuberkulos - ar det en zoonos?  [Paratuberculosis - is it a zoonosis?]  Svensk Veterinartidning.  2004; 56(6): 11-14.  ISSN:  0346-2250.  Note:  In Swedish with an English summary.  
NAL Call No.:  41.9 SV23
Descriptors:  beef cattle, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, potential zoonotic disease, Crohn’s disease in humans, control program, animal and public health concerns, epidemiology, Sweden.

Stewart, D.J.; Vaughan, J.A.; Stiles, P.L.; Noske, P.J.; Tizard, M.L.V.; Prowse, S.J.; Michalski, W.P.; Butler, K.L.; Jones, S.L.  A long-term study in Merino sheep experimentally infected with Mycobacterium avium subsp. paratuberculosis: clinical disease, faecal culture and immunological studies.  Veterinary Microbiology.  2004; 104(3/4): 165-178.  ISSN:  0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8 NAL Call No.:  SF601.V44
Descriptors:  Merino sheep, experimental infection with Mycobacterium avium subsp. paratuberculosis, long term study, clinical picture, fecal culture, immunological studies, antibodies, antibody formation, cell mediated immunity, interferon gamma test, absorbed ELISA, diagnosis, diagnostic techniques.

Stich, R.W.; Byrum, B.; Love, B.; Theus, N.; Barber, L.; Shulaw, W.P.  Evaluation of an automated system for non-radiometric detection of Mycobacterium avium paratuberculosis in bovine feces.  Journal of Microbiological Methods.  2004; 56(2): 267-275.  ISSN:  0167-7012.
URL:   http://dx.doi.org/doi:10.1016/j.mimet.2003.10.013
Descriptors:
  evaluation of a broth-based automated culture system, Mycobacterium avium subsp. paratuberculosis, bovine fecal testing, tested various dilutions of spiked bovine feces, Mycobacteria confirmed with IS900-based PCR assay, and acid fast staining, validated against Herrold’s egg yolk solid medium and defined test specimens.

Stratmann, J.; Strommenger, B.; Goethe, R.; Dohmann, K.; Gerlach, G.F.; Stevenson, K.; Li, L.L.; Zhang, Q.; Kapur, V.; Bull, T.J.  A 38-kilobase pathogenicity island specific for Mycobacterium avium subsp. paratuberculosis encodes cell surface proteins expressed in the host.  Infection and Immunity.  2004; 72(3): 1265-1274.  ISSN:  0019-9567.
URL:  http://iai.asm.org/cgi/content/abstract/72/3/1265
NAL Call No.:  QR1.I57
Descriptors:  functional genomics, pathogenicity, Mycobacterium avium subsp. paratuberculosis, novel ABC transporter operon, gene expression, nucleotide sequences, open reading frames, Johne’s disease of cattle, paratuberculosis, surface proteins MptD, transposable elements.  

Sung, N.; Takayama, K.; Collins, M.TA.  Possible association of GroES and antigen 85 proteins with heat resistance of Mycobacterium paratuberculosis.  Applied and Environmental Microbiology.  2004; 70(3): 1688-1697.  ISSN: 0099-2240.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=83
NAL Call No.:  448.3 AP5
Abstract:  Conflicting reports on the heat resistance of Mycobacterium paratuberculosis prompted an examination of the effect of culture medium on this property of the organism.  M. paratuberculosis was cultured in three types of media (fatty acid-containing medium 7H9-OADC (oleic acid-albumin-dextrose-catalase supplement) and glycerol-containing media WR-GD and 7H9-GD [glycerol-dextrose supplement]) at pH 6.0.  M. paratuberculosis grown under these three culture conditions was then tested for heat resistance in distilled water at 65+C.  Soluble proteins and mycolic acids of M. paratuberculosis were evaluated by two-dimensional electrophoresis (2-DE) and thin-layer chromatography (TLC), respectively.  The type of culture medium used significantly affected the heat resistance of M. paratuberculosis.  The decimal reduction times at 65+C (D(65+C) values; times required to reduce the concentration of bacteria by a factor of 10 at 65+C) for M. paratuberculosis strains grown in 7H9-OADC were significantly higher than those for the organisms grown in WR-GD medium (P < 0.01).  When the glycerol-dextrose supplement of WR was substituted for the fatty acid supplement (OADC) in 7H9 medium (resulting in 7H9-GD), the D(65+C) value was significantly lower than that for the organism grown in 7H9-OADC medium (P = 0.022) but higher than that when it was cultured in WR-GD medium (P = 0.005).  Proteomic analysis by 2-DE of soluble proteins extracted from M. paratuberculosis grown without heat stress in the three media (7H9-OADC, 7H9-GD, and WR-GD) revealed that seven proteins were more highly expressed in 7H9-OADC medium than in the other two media.  When the seven proteins were subjected to matrix-assisted laser desorption ionization-mass spectrometric analysis, four of the seven protein spots were unidentifiable.  The other three proteins were identified as GroES heat shock protein, alpha antigen, and antigen 85 complex B (Ag85B; fibronectin-binding protein).  These proteins may be associated with the heat resistance of M. paratuberculosis.  Alpha antigen and Ag85B are both trehalose mycolyltransferases involved in mycobacterial cell wall assembly.  TLC revealed that 7H9-OADC medium supported production of more trehalose dimycolates and cell wall-bound mycolic acids than did WR-GD medium.  The present study shows that in vitro culture conditions significantly affect heat resistance, cell wall synthesis, and protein expression of M. paratuberculosis and emphasize the importance of culture conditions on in vitro and ex vivo studies to estimate heat resistance.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, animal pathogenic bacteria, bacterial antigens, bacterial proteins, heat shock proteins, organic acids and salts, heat tolerance, cell culture, 3 types of culture media, proteome, proteomics, protein content, lipids, cell walls, mycolic acid.

Sung, N.; Collins, M.T.  Variation in resistance of Mycobacterium paratuberculosis to acid environments as a function of culture medium.  Bulletin of the International Dairy Federation.  2004; (392): 68.  ISSN:  0250-5118. 
NAL Call No.:  44.9 IN82B
Descriptors:  Mycobacterium avium subsp. paratuberculosis, in vitro growth medium either high fatty acid (7H9-OADC) or glycerol (WR-GD and 7H9-GD), acid resistance, pH levels 6.0 and 6.8, resistance to acetate buffer at pH 3, 4, and 6, bacterial proteins, culture media, fatty acids, food safety, glycerol, growth rate, heat resistance, morphology, radiometric culture method (BACTEC) and D values, soluable proteins analyzed by SDS-PAGE, susceptibility.

Taddei, S.; Robbi, C.; Cesena, C.; Rossi, I.; Schiano, E.; Arrigoni, N.; Vicenzoni, G.; Cavirani, S. Detection of Mycobaterium avium subsp. paratuberculosis in bovine fecal samples: comparison of three polymerase chain reaction-based diagnostic tests with a conventional culture method. Journal of Veterinary Diagnostic Investigation.  2004; 16(6): 503-508. ISSN: 1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  dairy cows, Mycobacterium avium subsp. paratuberculosis, disease detection, feces, DNA, polymerase chain reaction, PCR, analytical kits, cell culture, diagnostic techniques, disease diagnosis.

Tavornpanich, S.; Gardner, I.A.; Anderson, R.J.; Shin, S.; Whitlock, R.H.; Fyock, T.; Adaska, J.M.; Walker, R.L.; Hietala, S.K.  Evaluation of microbial culture of pooled fecal samples for detection of Mycobacterium avium subsp. paratuberculosis in large dairy herds.  American Journal of Veterinary Research.  2004; 65(8): 1061-1070.  ISSN: 0002-9645.
NAL Call No.:  41.8 AM3A
Descriptors:  paratuberculosis, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, pooled fecal cultures, evaluation of the reliability of detection method.

Tooker, B.C.; Coussens, P.M.  Phagocytosis of M. paratuberculosis fails to activate expression of NADH dehydrogenase and nucleolin-related protein in bovine macrophages.  Immunology Letters.  2004; 93(2-3): 137-142.  ISSN:  0165-2478.
URL:  http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T75-4C56HGV-1&_user=10&_handle=B-WA-A-W-WU-MsSAYZA-UUA-AUEBEWCAUZ-AUEACUCEUZ-CVYUDDEBB-WU-U&_fmt=summary&_coverDate=05%2F15%2F2004&_rdoc=6&_orig=browse&_srch=%23toc%235049%232004%23999069997%23502730!&_cdi=5049&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=5a4b860fb6e08b39c0067dc3fe211769%20 Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, bacterial diseases, Johne’s disease, gene expression, NADH dehydrogenase, pathogenesis, macrophages, phagocytosis.

Tremblay, Robert.  Emerging threats for public health associated with dairy cattle.  Medecin Veterinaire du Quebec.  2004; 34(1-2): 90-92.  ISSN:  0225-9591.  
Descriptors:  dairy cattle, zoonotic diseases, Coxiella burnetii, Cryptosporidium parvum, Mycobacterium avium subsp. paratuberculosis, Crohn's disease, dairy cattle, foodborne diseases, paratuberculosis, Q fever, reviews.  

Tryland, Morten; Olsen, Ingrid; Vikoren, Turid; Handeland Kjell; Arnemo, Jon M.; Tharaldsen, Jorun; Djonne, Berit; Josefsen, Terje D.; Reitan, Liv J. Serologic survey for antibodies against Mycobacterium avium subsp. paratuberculosis in free-ranging cervids from Norway.  Journal of Wildlife Diseases.  2004; 40(1): 32-41.  ISSN:  0090-3558.
URL:  http://www.jwildlifedis.org/ 
NAL Call No.:  41.9 W64B
Descriptors:  red deer, Cervus elaphus, moose, Alces alces, roe deer, Capreolus capreolus, reindeer, Rangifer tarandus tarandus, antibodies, ELISA, Johne’s disease, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, serological surveys, affinity between protein G and immunoglobulins, screening method, Norway.  

Valentin Weigand, P.  Intracellular invasion and persistence: survival strategies of Streptococcus suis and Mycobacterium avium ssp. paratuberculosis.  Berliner und Munchener Tierarztliche Wochenschrift.  2004; 117(11/12): 459-463.  ISSN:  0005-9366.
NAL Call No.:  41.8 B45
Descriptors:  pigs, ruminants, Streptococcus suis and Mycobacterium avium ssp. paratuberculosis, comparison study, bacterial pathogens, host specificity, tissue tropism, differences in tissue preferences, differences in intracellular behaviors and persistence, persistence in macrophages.

Valheim, M.; Sigurdardottir, O.G.; Storset, A.K.; Aune, L.G.; Press, C. McL.  Characterization of macrophages and occurrence of T cells in intestinal lesions of subclinical paratuberculosis in goats.  Journal of Comparative Pathology.  2004; 131(2-3): 221-232.  ISSN:  0021-9975.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6861&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=6091bef4d15aae1adbceffba708c6eb8%20 NAL Call No.:  41.8 J82
Descriptors:  goats, intestines, lesions, latent infections, Mycobacterium avium subsp. paratuberculosis, apoptosis, CD4+ lymphocytes, CD8+ lymphocytes, CD 68+, T lymphocytes, cell mediated immunity, characterization, glycoproteins, macrophages, paratuberculosis, phenotypes, surface antigens.

Van Leeuwen, John.  Impacts and control of insidious infectious diseases - Beat them before they beat you and your clients Mycobacterium avium subspecies paratuberculosis, Neospora caninum, bovine leukemia virus, and bovine viral diarrhea virus in dairy cattle.  Medecin Veterinaire du Quebec.  2004; 34(1-2): 53-54.  ISSN:  0225-9591.  Note:  In English with a French summary.
Descriptors:  dairy cattle, Mycobacterium avium subsp. paratuberculosis, Neospora caninum, bovine leukemia virus, bovine viral diarrhea virus, disease control and prevention.

Vansnick, E.; de Rijk, P.; Vercammen, F.; Geysen, D.; Rigouts, L.; Portaels, F.  Newly developed primers for the detection of Mycobacterium avium subspecies paratuberculosis.  Veterinary Microbiology.  2004; 100(3/4): 197-204.  ISSN:  0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8 NAL Call No.:  SF601.V44
Descriptors:  cattle, red deer, Cervus elaphus, Mycobacterium avium subsp. paratuberculosis, 2 new PCR assays, IS900 using different primers, f57 sequence, analysis of 190 mycobacterial isolates, sensitivity tested at 1CFU per PCR, validation on large scale still needed.

Vesosky, B.; Turner, O.C.; Turner, J.; Orme, I.M.  Gamma interferon production by bovine gamma delta T cells following stimulation with mycobacterial mycolylarabinogalactan peptidoglycan.  Infection and Immunity.  2004; 72(8): 4612-4618.  ISSN:  0019-9567.  
URL:  http://iai.asm.org/cgi/content/abstract/72/8/4612
NAL Call No.:  QR1.I57
Descriptors:  cattle, bovine gamma delta T lymphocytes, production of IFN-gamma, in vitro cell culture, exposed to Mycobacterium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, Mycobacterium tuberculosis, nonspecific immunostimulation, immune response, interferon, interferon, interleukin-2, lipids, monocytes, peptidoglycans, lipoarabinomannan.

Villarino, M.A.; Jordan, E.  Effect of management related disease control methods on the development of Johne's disease in dairy cattle in Texas.  In:  Smith, R.A.  [Editor]  Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, September 23-25, 2004.  Published by the Association.  2004; 266-267.  ISSN:  0743-0450.  Note:  In English and French.
NAL Call No.:  SF961.A5
Descriptors:  dairy cattle, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, management related disease control methods, Texas, United States.  

Walker, B.  Stock permitted into NSW BJD Protected Zones.  Agnote NSW Agriculture.  2004; (DAI-322 (1st Edition)): 6.  ISSN:  1034-6848.  
URL:  http://www.agric.nsw.gov.au/reader/bjd-zoning/stock-into-bjd-prot-zones.htm
Descriptors:  beef cattle, Mycobacterium avium subsp. paratuberculosis, Johne’s disease control, zoning program, protected zoning, exemptions from movement restriction, testing of exempted cows, steers and other cattle for slaughter, veterinary approved for movement, CHECKTEST herds,  Beef Cattle Trade Assurance Scheme, outline of long term goals of Australian cattle industry, Australia.

Wang, YiQin; Bao, YongGan; Hu, LieShan.  Rapid detection of paratuberculosis in cattle and sheep by ELISA.  Chinese Journal of Animal Quarantine.  2004; 21(11): 27-28.  ISSN:  1005-944X.  Note:  In Chinese with an English summary.  
Descriptors:  cattle, sheep, blood serum sampling, Mycobacterium avium subsp. paratuberculosis, detection method, ELISA, antigen coated microplate, HRPO, color reaction, sensitive and accurate assay, absorbing sera with Mycobacterium phlei prior to test.

Ward, Michael P.; Perez, Andres M.  Association between soil type and paratuberculosis in cattle herds.  American Journal of Veterinary Research.  2004; 65(1): 10-14. ISSN:  0002-9645.  
URL:  http://avmajournals.avma.org/loi/ajvr
NAL Call No.:  41.8 AM3A
Descriptors:  92 cattle herds, soil type at herd location, Mycobacterium avium subsp. paratuberculosis, ELISA, bacterial survival may be enhanced by silt or sand content in loamy soils, Indiana.

Waters, W.R.; Nonnecke, B.J.; Palmer, M.V.; Robbe-Austermann, S.; Bannantine, J.P.; Stabel, J.R.; Whipple, D.L.; Payeur, J.B.; Estes, D.M.; Pitzer, J.E.; Minion, F.C.  Use of recombinant ESAT-6:CFP-10 fusion protein for differentiation of infections of cattle by Mycobacterium bovis and by M. avium subsp. avium and M. avium subsp. paratuberculosis.  Clinical and Diagnostic Laboratory Immunology.  2004; 11(4): 729-735.  ISSN:  1071-412X.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=84
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium, Mycobacterium bovis, bacterial antigens, cattle diseases, immunodiagnosis, immunological techniques, interferon, mycobacterial diseases, nitric oxide, recombinant proteins TNF, tumor necrosis factor, early secretory antigenic target 6 culture filtrate protein 10 fusin protein, invitro testing of blood leukocytes, IFN-gamma inducing antigens, diagnosis of infected animals.

Weber, M.F.; van Roermund, H.J.W.; Assink, H.B.J.; Stegeman, J.A.  Rate and structure of cattle transfers between cattle herds considered to be free of paratuberculosis.  In:  Reid, S.W.J.; Menzies, F.D.; Russell, A.M.  Society for Veterinary Epidemiology and Preventive Medicine Proceedings of a Meeting Held at the Martigny, Switzerland on March 24-26, 2004. Published by the Society, Roslin, UK.  2004; 216-225.  ISBN:  0948073640.  
Descriptors:  cattle, transport between 206 herds free of Mycobacterium avium subsp. paratuberculosis, disease transmission, paratuberculosis, transport of animals, The Netherlands.

Weber, M.F.; Groenendaal, H.; van Roermund, H.J.W.; Nielen, M.  Simulation of alternatives for the Dutch Johne's disease certification-and-monitoring program.  Preventive Veterinary Medicine.  2004; 62(1): 1-17.  ISSN:  0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f NAL Call No.:  SF601.P7
Descriptors:  disease free dairy herds, dairy cattle herd monitoring, a stochastic simulation model ("JohneSSim"), optimal methods for certification, monitoring schemes, disease surveillance, disease control, simulation models, disease transmission, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, disease detection, disease prevalence, animal pathogenic bacteria, cattle diseases, The Netherlands.  

Weiss, D.J.; Evanson, O.A.; Deng, M.; Abrahamsen, M.S.  Sequential patterns of gene expression by bovine monocyte-derived macrophages associated with ingestion of mycobacterial organisms.  Microbial Pathogenesis.  2004; 37(4): 215-224.  ISSN: 0882-4010
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6954&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=0ce0cc81f81ede9640040947d652abf1 NAL Call No.:  QR175.M53
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, animal pathogenic bacteria, paratuberculosis, microarray technology.

Whittington, R.J.; Marshall, D.J.; Nicholls, P.J.; Marsh, I.B.; Reddacliff, L.A.  Survival and dormancy of Mycobacterium avium subsp. paratuberculosis in the environment.  Applied and Environmental Microbiology.  2004; 70(5): 2989-3004.  ISSN: 0099-2240.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=83
NAL Call No.:  448.3 AP5   The survival of Mycobacterium avium subsp. paratuberculosis was studied by culture of fecal material sampled at intervals for up to 117 weeks from soil and grass in pasture plots and boxes.  Survival for up to 55 weeks was observed in a dry fully shaded environment, with much shorter survival times in unshaded locations.  Moisture and application of lime to soil did not affect survival.  UV radiation was an unlikely factor, but infrared wavelengths leading to diurnal temperature flux may be the significant detrimental component that is correlated with lack of shade.  The organism survived for up to 24 weeks on grass that germinated through infected fecal material applied to the soil surface in completely shaded boxes and for up to 9 weeks on grass in 70% shade.  The observed patterns of recovery in three of four experiments and changes in viable counts were indicative of dormancy, a hitherto unreported property of this taxon.  A dps-like genetic element and relA, which are involved in dormancy responses in other mycobacteria, are present in the M. avium subsp. paratuberculosis genome sequence, providing indirect evidence for the existence of physiological mechanisms enabling dormancy. However, survival of M. avium subsp. paratuberculosis in the environment is finite, consistent with its taxonomic description as an obligate parasite of animals.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, animal pathogenic bacteria, pathogen survival, dormancy in the environment, disease reservoirs, feces, sheep, animal manures, fecal contamination, grassland soils, pastures, soil pollution, soil pH, soil water, effects of ultraviolet radiation, solar radiation, shade, sandy loam soils, structural genes, DNA binding proteins, kinases, dormancy associated genes, Dps protein, GTP pyrophosphokinase, relA gene, dps gene, New South Wales.

Wilks, C.R. Another brick in the wall.  Australian Veterinary Journal.  2004; 82(12): 762.  ISSN: 
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  Johne’s disease, cattle, horses, fish, pigs, animal pathogen, disease control.  

Wikse, S.E.  Preventive medicine procedures for cattle.  In:  Smith, R.A. [Editor]  Proceedings of the Thirty Seventh Annual Conference, American Association of Bovine Practitioners, Forth Worth, Texas, City, USA, 23-25-September, 2004.  Published by the Association.  2004; 199-200, 265-266.  ISSN:  0743-0450.  Note:  In English and French.
NAL Call No.:  SF961.A5
Descriptors:  cattle, veterinary technicians, cattle preventive medicine, processing calves, processing replacement heifers and in collection of samples for herd biosecurity programs, disease monitoring for bovine diarrhea, Johne’s disease.

Wiszniewska, Agnieszka; Szteyn, Joanna; Fus, Maria Monika.  Porownanie wzrostu Mycobacterium avium subsp. paratuberculosis na trzech podlozach mikrobiologicznych.  [Comparison of growth of Mycobacterium avium subsp. paratuberculosis on three microbiological media.]  Medycyna Weterynaryjna.  2004; 60(9): 982-984.  ISSN:  0025-8628.  Note:  In Polish.
NAL Call No.:  41.8 M463
Descriptors:  Mycobacterium avium subsp. paratuberculosis, comparison study, growth on 3 culture media, antibiotics, microbial contamination, milk testing, paratuberculosis, Johne’s disease.

Worthington, R.W.  The diagnosis of Johne's disease.  Surveillance Wellington.  2004; 31(3): 8-13.  ISSN:  0112-4927.  
Descriptors:  Johne’s disease, Mycobacterium avium subsp. paratuberculosis, diagnosis difficult in subclinical infections of livestock, combination of tests, cellular immune response, serology, bacterial culture, histopathology.

Yan, Si Tong; Lin, Zhi Xiong; Zhu, Dao Zhong; Yu, Hai Qiong; Cai, Zhi Ling.  Study of microcomplement fixation test for cattle paratuberculosis and sheep paratuberculosis. Chinese Journal of Animal Quarantine.  2004; 21(11): 23-26.  ISSN:  1005-944x.  Note:  In Chinese with an English summary.
Descriptors:  cattle, sheep, Mycobacterium avium subsp. paratuberculosis, microcomplement fixation test.


Return to Contents

2003

Abbott, K.A.; Whittington, R.J.  Monte Carlo simulation of flock-level sensitivity of abattoir surveillance for ovine paratuberculosis.  Preventive Veterinary Medicine.  2003; 61(4): 309-332.  ISSN:  0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  sheep, disease survey, Mycobacterium avium subsp. paratuberculosis, post slaughter data, disease prevalence, epidemiology, Monte Carlo simulation model for flock level sensitivity to Johne’s disease, comments on the usefulness of the approach.

Adaska, John M.; Anderson, Randall J.  Seroprevalence of Johne's-disease infection in dairy cattle in California, USA.  Preventive Veterinary Medicine.  2003; 60(3): 255-261.  ISSN:  0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  dairy cattle, 65 dairy herds, Mycobacterium avium subsp. paratuberculosis, disease distribution, disease prevalence, seroprevalance, 1950 serum samples, antibody testing, ELISA kit, epidemiology, paratuberculosis, regional disease data, California, United States.

Aho, Abraham D.; McNulty, Amanda M.; Coussens, Paul M.  Enhanced expression of interleukin-1alpha and tumor necrosis factor receptor-associated protein 1 in ileal tissues of cattle infected with Mycobacterium avium subsp. paratuberculosis.  Infection and Immunity.  2003; 71(11): 6479-6486.  ISSN:  0019-9567.
URL:  http://www.jarvm.com/
NAL Call No.:  QR1.I57
Descriptors:  Holstein cattle, Mycobacterium avium subsp. paratuberculosis, comparison study, disease positive and negative, gene expression profiles of ileal tissues, gene expression profiles, bovine total leukocyte (BOTL-3) cDNA microarray, infected animals, tumor necrosis factor receptor-associated protein 1 (TRAF1), interleukin-1alpha (IL-1alpha), MCP-2, N-cadherin, and beta1 integrin (CD29), upregulation of IL-1alpha (21.5-fold) and TRAF1 (27.5-fold) gene expression in tissues of Johne's disease positive.

Ahrens, P.; Bolske, G.; Djonne, B.; Klausen, J.; Christensen, B. [Editors]  Paratuberculosis, Proceedings of the 15th Symposium of the Nordic Committee for Veterinary Scientific Cooperation (NKVet), Copenhagen, Denmark, 18-19 May 2001.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 207-295.  ISSN:  0044-605X.
NAL Call No.:  41.8 AC87
Descriptors:  goats, Johne’s disease, present knowledge, eradication, diagnosis, control programs and strategies, Mycobacterium avium subsp. paratuberculosis, possible cause of Crohn’s disease in humans, herd level antibodies, milk contamination, Denmark, Finland, Iceland, Norway, Sweden.

Anonymous.  Animal health following drought. Agnote DAI-224.  Agnote NSW Agriculture. 2003; (DAI-224 (2nd Edition)): 8 p.  ISSN:  1034-6848.
URL:  http://www.agric.nsw.gov.au/reader/5747
Descriptors:  cattle, bulls, Johne’s disease, animal health, animal welfare, stocking density, vaccination, drought grass tetany, brucellosis, helminthes, leptospirosis, New South Wales, Australia.

Arsenault, J.; Girard, C.  Particularites ovines de la paratuberculose.  [Particularities of ovine paratuberculosis.]  Medecin Veterinaire du Quebec.  2003; 33(1-2): 28-31.  ISSN:  0225-9591.  Note:  In French.  
Descriptors:  sheep, Johne’s disease, clinical aspects, diagnosis, disease transmission, disease prevention and control, risk factors, paratuberculosis.

Arsenault, Julie; Girard, Christiane; Dubreuil, Pascal; Daignault, Danielle; Galarneau, Jean Rene; Boisclair, Julie; Simard, Carole; Belanger, Denise.  Prevalence of and carcass condemnation from maedi-visna, paratuberculosis and caseous lymphadenitis in culled sheep from Quebec, Canada.  Preventive Veterinary Medicine.  2003; 59(1-2): 67-81.  ISSN:  0167-5877.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  culled sheep, ewes, rams, Corynebacterium pseudotuberculosis, Mycobacterium avium subsp. paratuberculosis, lung and mammary gland lesions, caseous lymphadenitis, ELISA testing, histologic lesions in terminal ileum, ileocecal lymph node/ ileocecal valve, sex and age differences, carcass condemnation, disease distribution, disease prevalence, epidemiology, lymphadenitis, paratuberculosis, seroprevalence, sex differences, visna maedi virus, Quebec, Canada.

Australia NSW OJD Advisory Committee.  Future Management of OJD is in Your Hands.  2003; 5 p.
Descriptors:  sheep, Johne’s disease, disease control, disease prevalence, disease prevention, Australia.

Balseiro, A.; Prieto, J.M.; Espi, A.; Perez, V.; Garcia-Marin, J.F.  Presence of focal and multifocal paratuberculosis lesions in mesenteric lymph nodes and the ileocaecal valve of cattle positive to the tuberculin skin test.  Veterinary Journal.  2003; 166(2): 210-212.  ISSN:  1090-0233.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=7163&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f68d9c40dd58509407a11a133122c879
NAL Call No.:  SF601.V484
Descriptors:  cattle, animal with positive (91 animals) and negative (43 animals) tuberculin skin tests, immunohistochemistry testing for Mycobacterium avium subsp. paratuberculosis, small intestine, cecum, mesenteric lymph nodes, ileum, ileocecal valve, clinical aspects, granulomas, mesentery, pathology.

Bannantine, J.P.; Hansen, J.K.; Stabel, J.R.; Kapur, V.  Evaluation of novel Mycobacterium avium subsp. paratuberculosis antigens as potential diagnostic reagents.  Abstracts of the General Meeting of the American Society for Microbiology.  2003; 103: U-051.  ISSN:  1060-2011.  Note:  103rd American Society for Microbiology General Meeting, Washington, DC, USA; May 18-22, 2003.  
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, differentiation between the 2 species, 21 predicted coding sequences unique to MAP, amplified and cloned into an E. coli expression vector, immunoblotting studies, sera from rabbits and mice, 5 gene products detected in all sera, same proteins in infected cattle, method to identify novel antigens.

Bannantine, John P.; Zhang, Qing; Li, Ling Ling; Kapur, Vivek.  Genomic homogeneity between Mycobacterium avium subsp. avium and Mycobacterium avium subsp. paratuberculosis belies their divergent growth rates.  BMC Microbiology.  2003; 3(10): (Cited June 13, 2003).  ISSN:  1471-2180.  
URL:  http://www.biomedcentral.com/1471-2180
Descriptors:  Mycobacterium avium, Mycobacterium avium subsp. avium, Mycobacterium avium subsp. paratuberculosis, nucleotide sequences, genome similarities, genomic comparison study, oligonucleotide primers, conserved gene order in the oriC locus of Mycobacterium avium subsp. paratuberculosis, genetic variation between species, growth rate differences, open reading frames.

Bannantine, John P.; Huntley, Jason F.J.; Miltner, Elizabeth; Stabel, Judith R.; Bermudez, Luiz E.  The Mycobacterium avium subsp. paratuberculosis 35 kDa protein plays a role in invasion of bovine epithelial cells.  Microbiology.  2003; 149(8): 2061-2069.  ISSN:  1350-0872.
URL:  http://mic.sgmjournals.org/contents-by-date.0.shtml
NAL Call No.:  QR1.J64
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, E. coli , Johne’s disease, antibodies, DNA cloning, gene expression, 35kDa major membrane proteins (MMP), bacterial invasion of bovine epithelial cells, intestinal environment of low oxygen and high osmolarity, surface proteins, virulence factors.

Barrington, G.M.; Gay, J.M.; Eriks, I.S.; Davis, W.C.; Evermann, J.F.; Emerson, C.; O' Rourke, J.L.; Hamilton, M.J.; Bradway, D.S.  Temporal patterns of diagnostic results in serial samples from cattle with advanced paratuberculosis infections.  Journal of Veterinary Diagnostic Investigation.  2003; 15(2): 195-200.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  cows, Mycobacterium avium subsp. paratuberculosis, diagnosis, diagnostic techniques and strategies, ELISA, paratuberculosis, PCR of blood, milk, liver, feces, temporal variation, fecal cultures, diagnostic sensitivity figures.

Benedictus, G.; Kalis, C.J.H.  Paratuberculosis: eradication, control and diagnostic methods.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 231-241.  ISSN:  0044-605X.
NAL Call No.:  41.8 AC87
Descriptors:  sheep, goats, cattle, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, control programs, culling of sick animals, diagnostic techniques, disease control, vaccination, immunity, immunizations, reviews, ODGE.

Boegli-Stuber, K.; Glanemann, B.; Seitert, G.; Kohler, C.; Wittwer, M.; Wittenbrink, M.M.; Bissig-Choisat, B.  Development and validation of a real-time PCR assay for the detection of Mycobacterium avium subspecies paratuberculosis (MAP) in fecal samples and its correlation to culture.  FEMS Congress of European Microbiologists Abstract Book.  2003; (1): 54.  Note:  1st Federation of European Microbiological Societies (FEMS) Congress of European Microbiologists, Ljubljana, Slovenia; June 29-July 03, 2003.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, fecal sampling, detection methods, real-time PCR.

Bolske, G.; Englund, S.  Ongoing research on paratuberculosis in Sweden.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 275-278.  ISSN:  0044-605X.
NAL Call No.:  41.8 AC87
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, research programs on Johne’s disease, control programs, diagnosis, diagnostic techniques, ELISA, PCR, Sweden.

Buddle, B.M.; McCarthy, A.R.; Ryan, T.J.; Pollock, J.M.; Vordermeier, H.M.; Hewinson, R.G.; Andersen, P.; De Lisle, G.W.  Use of mycobacterial peptides and recombinant proteins for the diagnosis of bovine tuberculosis in skin test-positive cattle.  Veterinary Record.  2003; 153(20): 615-620.  ISSN: 0042-4900.
URL:  http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  bovine tuberculosis, cattle, synthetic peptides, antigen detection, skin lesions, skin tests, paratuberculosis, diagnostic techniques, cross reaction, tuberculin, recombinant proteins, disease diagnosis, Mycobacterium bovis, interferons, skin folds, vaccination, Mycobacterium avium subsp. paratuberculosis, animal pathogenic bacteria.

Buergelt, C.D.; Williams, E.  In utero infection of pregnant cattle by Mycobacterium avium subspecies paratuberculosis detected by nested polymerase chain reaction.  Journal of Applied Research in Veterinary Medicine.  2003; 1(4): 279-284.  ISSN:  1471-2180.
URL:  http://www.jarvm.com/
NAL Call No.:  SF601.J63
Descriptors:  nested PCR using 2 sets of primers, detection of Mycobacterium avium subsp. paratuberculosis in fetal fluid and fetal tissues, 3 pregnant cows with clinical Johne’s disease, necropsy, various tissues tested, Mycobacterium avium subsp. paratuberculosis found in various tissues, PCR assay useful for in utero infection.

Bull, Richard.  Assessment of the NSW Ovine Johne's Disease Program: [Summary]. NSW Ministry of Agriculture, New South Wales.  [2003]; 51 p.  ISBN: 0734715358.  Note:  "September 2003."  “This report is presented by independent consultant Richard Bull to the NSW Minister for Agriculture, the Hon. Ian Macdonald."
NAL Call No.:  SF969.P34 B86 2003
Descriptors:  sheep, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, assessment of the current Ovine Johne's Disease (OJD) program, recommendation for the future, New South Wales, Australia.

Bull, T.J.; Sidi-Boumedine, K.; McMinn, E.J.; Stevenson, K.; Pickup, R.; Hermon-Taylor, J.  Mycobacterial interspersed repetitive units (MIRU) differentiate Mycobacterium avium subspecies paratuberculosis from other species of the Mycobacterium avium complex. Molecular and Cellular Probes.  2003; 17(4): 157-164.  ISSN:  0890-8508.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6959&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=a1d954773ca83f03ff7b5c0d870580ef
NAL Call No.:  RB43.7 M63
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, Mycobacerium avium complex, mycobacterial interspersed repetitive units, 18 conserved loci, 6 loci differ, locus specific PCR, Mycobacterium avium subsp. paratuberculosis segregated into 2 major groups, ovine pigmented Mycobacterium avium subsp. paratuberculosis and vaccine strains, Mycobacterium avium subsp. avium differentiated into 5 profiles, Mycobacterium intracellulare, mycobacterial interspersed repetitive units locus 1 and mycobacterial interspersed repetitive units locus 4 distinguished between Mycobacterium avium subsp. paratuberculosis and Mycobacerium avium complex.

Buza, Joram J.; Mori, Yasuyuki; Bari, Abusaleh M.; Hikono, Hirokazu; Aodon Geril; Hirayama, Sachiyo; Shu, Yujing; Momotani, Eiichi.  Mycobacterium avium subsp. paratuberculosis infection causes suppression of RANTES, monocyte chemoattractant protein 1, and tumor necrosis factor alpha expression in peripheral blood of experimentally infected cattle. Infection and Immunity.  2003; 71(12): 7223-7227.  ISSN:  0019-9567.
URL:  http://www.jarvm.com/
NAL Call No.:  QR1.I57
Descriptors:  Holstein cattle, experimental infection, Mycobacterium avium subsp. paratuberculosis, immune response, chemokines, interleukin-1, tumour necrosis factor alpha, interleukin 8, monocyte chemotactic protein 1, RANTES, weakening of protective immunity.

Caspersen, O.  Spildt ko: afmagrede malkekoer med Darlig velfaerd er et stigende problem.  Wasted cows.  [Emaciated dairy cattle with poor welfare status are a growing problem.]  Dansk Veterinaertidsskrift.  2003; 86(17): 12-14.  ISSN:  0106-6854.  Note:  In Danish.
Descriptors:  dairy cattle, generalized muscular atrophy, failing pre-slaughter inspection, post mortem inspections show chronic intestinal inflammation, probably Mycobacterium avium subsp. paratuberculosis, increasing trend, economic costs, animal welfare concerns, Denmark.

Checkley, S.L.; Waldner, C.L.; Appleyard, G.D.; Campbell, J.R.; Forsythe, L.A.; Janzen, E.D.  The comparison of 5 diagnostic tests for diagnosis of Johne's disease in Western Canada.  Journal of Applied Research in Veterinary Medicine.  2003; 1(3): 196-205.  ISSN:  1542-2666.  
URL:  http://www.jarvm.com/
NAL Call No.:  SF601.J63
Descriptors:  5 diagnostic tests for Mycobacterium avium subsp. paratuberculosis, Johne’s disease compared, 1) ELISA, 2) fecal culture slants of HEYM, 3) AGID, 4-5) 2 PCR, 5 populations of cattle, testing results varied with populations, Canada.

Christopher-Hennings, J.; Dammen, M.A.; Weeks, S.R.; Epperson, W.B.; Singh, S.N.; Steinlicht, G.L.; Fang, Y.; Skaare, J.L.; Larsen, J.L.; Payeur, J.B.; Nelson, E.A.  Comparison of two DNA extractions and nested PCR, real-time PCR, a new commercial PCR assay, and bacterial culture for detection of Mycobacterium avium subsp. paratuberculosis in bovine feces.  Journal of Veterinary Diagnostic Investigation.  2003; 15(2): 87-93.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  cattle, bacterial diseases, Johne’s disease, detection of Mycobacterium avium subsp. paratuberculosis, fecal testing, 5 combinations of 2 DNA extractions and 3 polymerase chain reaction (PCR) techniques, compared, diagnostic techniques, southern blotting, all showed similar sensitivities.

Collins, M.T.  Paratuberculosis: review of present knowledge.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 217-221.  ISSN:  0044-605X.  Note:  Review article.
NAL Call No.:  41.8 AC87
Descriptors:  cattle, humans, Mycobacterium avium subsp. paratuberculosis, Crohn’s disease, Johne’s disease, pathogenesis, clinical aspects, disease prevalence, disease prevention and control, economic impacts of disease, potential zoonotic disease, food safety, public health concerns.

Collins, M.T.  Update on paratuberculosis. 1. Epidemiology of Johne's disease and the biology of Mycobacterium paratuberculosis.  Irish Veterinary Journal.  2003; 56(11): 565-574.  ISSN:  0368-0762.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, epidemiology, host range of bacterial pathogen, disease distribution, disease prevalence, disease transmission, pathogenicity, virulence, survival mechanisms, cold tolerance, heat tolerance, pasteurization.

Collins, M.T.  Update on paratuberculosis. 2. Pathology and diagnosis.  Irish Veterinary Journal.  2003; 56(12): 619-620, 622-623.  ISSN:  0368-0762.
Descriptors:  goats, cattle, sheep, Johne’s disease, Mycobacterium avium subsp. paratuberculosis clinical aspects, lesions, histopathology, diagnosis, diagnostic techniques.

Corner, L.A.L.; Pfeiffer, D.U.; Abbott, K.A.  Unanswered questions about the transmission of Mycobacterium avium subspecies paratuberculosis.  Veterinary Journal.  2003; 165(3): 182-183.  ISSN:  1090-0233.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=7163&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f68d9c40dd58509407a11a133122c879
NAL Call No.:  SF601.V484
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, disease transmission, disease vectors.

Coussens, Paul M.; Colvin, Christopher J.; Rosa, Guilherme J.M.; Laspiur, Juliana Perez; Elftman, Michael D.  Evidence for a novel gene expression program in peripheral blood mononuclear cells from Mycobacterium avium subsp. paratuberculosis-infected cattle.  Infection and Immunity.  2003; 71(11): 6487-6498.  ISSN:  0019-9567.
URL:  http://www.jarvm.com/
NAL Call No.:  QR1.I57
Descriptors:  Holstein-Fresian cattle, infected and uninfected animals, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, gene expression profiles, peripheral blood mononuclear cells (PBMCs) cell mediated immunity, in vivo and in vitro comparison, gene expression, complementary DNA, immune response, interferon, lymphocytes, molecular genetics.

Cywinska, A.; Bas, M.  Czy paratuberkuloza jest zoonoza?  [Is paratuberculosis a zoonosis?].  Zycie Weterynaryjne.  2003; 78(3): 155-160.  ISSN:  0137-6810.  Note:  In Polish with an English summary.
NAL Call No.:  SF604.Z9
Descriptors:  ruminants, humans, Mycobacterium avium subsp. paratuberculosis, Johne’s disease in animals, Crohn’s disease in humans, disease transmission possibilities, raw milk, food contamination, food safety, zoonoses.

Dagleish, M.; Goddard, P.  Dealing with disease.  Deer Farming.  2003; (74): 23-25.
Descriptors:  deer, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, diagnosis, pathology, epidemiology, pathogenesis, disease control, vaccination, United Kingdom.

Daniels, Mike J.; Hutchings, Michael R.; Beard, Philippa M.; Henderson, Dennis; Greig, Alastair; Stevenson, Karen; Sharp, J. Michael.  Do non-ruminant wildlife pose a risk of paratuberculosis to domestic livestock and vice versa in Scotland?  Journal of Wildlife Diseases.  2003; 39(1): 10-15.  ISSN:  0090-3558.
URL: http://www.jwildlifedis.org/
NAL Call No.:  41.9 W64B
Descriptors:  non-ruminant wildlife, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, disease surveys, disease transmission, disease vectors, epidemiological surveys, epidemiology paratuberculosis, risk assessment, pasture contamination, rabbits, canid, mustelid, corvid, murids, review, Scotland.

Daniels, M.J.; Henderson, D.; Greig, A.; Stevenson, K.; Sharp, J.M.; Hutchings, M.R.  The potential role of wild rabbits Oryctolagus cuniculus in the epidemiology of paratuberculosis in domestic ruminants.  Epidemiology and Infection.  2003; 130(3): 553-559.  ISSN:  0950-2688.
URL:  http://journals.cambridge.org/action/displayJournal?jid=HYG&bVolume=y
NAL Call No.: RA651.A1E74
Descriptors:  cattle, sheep, ruminants, Mycobacterium avium subsp. paratuberculosis found in wild rabbits, Oryctolagus cuniculus, fecal pellets, urine, field contaminations, 4 farms, rabbit control should be considered as part of a disease control strategies, Scotland, United Kingdom.

Daniels, Mike J.; Lees, Jon D.; Hutchings, Michael R.; Greig, Alastair.  The ranging behaviour and habitat use of rabbits on farmland and their potential role in the epidemiology of paratuberculosis.  Veterinary Journal. 2003; 165(3): 248-257.  ISSN:  1090-0233.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=7163&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f68d9c40dd58509407a11a133122c879
NAL Call No.:  SF601 V484
Descriptors:  rabbits, potential disease reservoir, Mycobacterium avium subsp. paratuberculosis, grazing animals, non-avoidance of rabbit pellets, infected farm study, seasonal effects and spatial differences in rabbit feces deposition, management practices to reduce livestock exposure, Scotland.

Daniels, M.J.; Hutchings, M.R.; Greig, A.  The risk of disease transmission to livestock posed by contamination of farm stored feed by wildlife excreta.  Epidemiology and Infection. 2003; 130(3): 561-568.  ISSN:  0950-2688.  
URL:  http://journals.cambridge.org/action/displayJournal?jid=HYG&bVolume=y
NAL Call No.:  RA651.A1E74
Descriptors:  wild mice and rats, Apodemus sylvaticus, Mus domesticus, Musculus, Rattus novegicus, wild birds, Passer domesticus, Columba livia, pigeons, livestock, cattle, sheep, livestock feed, role of feed contamination by wild animal feces, microbial disease transmission, disease reservoirs, cryptosporidiosis, salmonellosis, Salmonella, Mycobacterium avium subsp. paratuberculosis, infectious probabilities, indications feed is a potential source of the 3 diseases, Scotland, United Kingdom.

De A. Pinto, P.S. Atualizacao em controle da tuberculose no contexto da inspecao de carnes.  [Tuberculosis control update at the meat inspection context.]  Bioscience Journal.  2003; 19(1): 115-121.  ISSN:  1516-3725.  Note:  In Portuguese with an English summary.
NAL Call No.:  QH301.R485
Descriptors: cattle, humans, pigs, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, Mycobacterium bovis, tuberculosis, pathogenecity, lesions, diagnosis, disease control, food safety, meat inspections tuberculosis, zoonotic diseases.

De Lisle, G.W.; Yates, G.F.; Montgomery, R.H.  The emergence of Mycobacterium paratuberculosis in farmed deer in New Zealand - a review of 619 cases.  New Zealand Veterinary Journal.  2003; 51(2): 58-62.  ISSN:  0048-0169.
NAL Call No.:  41.8 N483
Descriptors:  619 deer, 299 farmed deer herds, Mycobacterium avium subsp. paratuberculosis, disease prevalence, epidemiology, case histories, statistics of infection presented, diagnostic techniques, New Zealand.

Denmark Danish Cattle Federation.  Annual Report - Danish Cattle Federation, 2003.  Danish Agricultural Advisory Service, National Centre. Aarhus, Denmark.  2003; 16 p.  
Descriptors:  cattle farming status, marketing, EU reforms, cattle feeding, nutrient standards, feed quality, breeding and breeding value across Nordic Countries, dry periods of dairy cows, housing, welfare, disease prevention, control, monitoring programs, Salmonella Dublin and Mycobacterium avium subsp. paratuberculosis, Denmark.

Deutz, A.; Spergser, J.; Rosengarten, R.; Kofer, J.  Erstnachweis der intrauterinen Ubertragung von Paratuberkulose bei Rot- und Gamswild.  [First detection of intrauterine transmission of paratuberculosis in red deer and chamois.]  Zeitschrift fuer Jagdwissenschaft.  2003; 49(4): 314-319.  ISSN:  0044-2887.  Note:  In German.  
URL:  http://springerlink.metapress.com/(opn50t45wrpt3u55vedijdvb)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:110828,1
NAL Call No.:  SK351.Z45
Descriptors:  red deer, chamois, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, wild ruminants, intrauterine transmission, disease reservoirs, suckler cow farming, contaminated feed in wildlife feeding, potential control measures, Austria.

Deutz, A.; Spergser, J.; Wagner, P.; Steineck, Th.; Kofer, J.; Rosengarten, R.  Increase of patatuberculosis in wild animal species in Styria.  FEMS Congress of European Microbiologists Abstract Book.  2003; (1): 496.  Note:  1st Federation of European Microbiological Societies (FEMS) Congress of European Microbiologists, Ljubljana, Slovenia; June 29-July 03, 2003.
Descriptors:  wild animal species, mouflon, fallow deer, red deer, row deer, yellow necked mouse, disease surveillance, Mycobacterium avium subsp. paratuberculosis, Styria, Austria.  

Deutz, A.; Spergser, J.; Wagner, P.; Steineck, Th; Koefer, J.; Rosengarten, R.  Paratuberkulose bei Wildtieren: Haeufung klinischer Faelle in freier Wildbahn.  [Paratuberculosis in wild animals: An observed increase in the clinical incidence.] Tieraerztliche Umschau.  2003; 58(9): 482-489.  ISSN:  0049-3864.  Note:  In German with an English summary.  
NAL Call No.:  41.8 T445
Descriptors:  Mycobacterium avium subsp. paratuberculosis, disease incidence, wild animals, red deer, roe deer, chamois, mouflon, fallow deer, yellow necked mouse, factors for increase, potential for improved diagnostic methods, prevention measures, meat hygiene issues, Stryia, South Austria.

Djonne, B.; Jensen, M.R.; Grant, I.R.; Holstad, G.  Detection by immunomagnetic PCR of Mycobacterium avium subsp. paratuberculosis in milk from dairy goats in Norway.  Veterinary Microbiology.  2003; 92(1-2): 135-143.  ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  goats, goat milk, Mycobacterium avium subsp. paratuberculosis, subclinical infections, epidemiological surveys, paratuberculosis, PCR, vaccination, Norway.

Djonne, B.; Jensen, M.R.; Grant, I R.; Holstad, G.  Detection of Mycobacterium avium subsp. paratuberculosis in goats milk by immunomagnetic PCR.  FEMS Congress of European Microbiologists Abstract Book.  2003; (1): 453.  Note:  1st Federation of European Microbiological Societies (FEMS) Congress of European Microbiologists, Ljubljana, Slovenia; June 29-July 03, 2003.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, detection method, immunomagnetic PCR, goat’s milk. 

Djonne, B.; Ahrens, P.; Pavlik, I.; Svastova, P.; Holstad, G.  Molecular typing of Mycobacterium avium subsp. paratuberculosis isolated from goats and cattle in Norway.  FEMS Congress of European Microbiologists Abstract Book.  2003; (1): 233.  Note:  1st Federation of European Microbiological Societies (FEMS) Congress of European Microbiologists, Ljubljana, Slovenia; June 29-July 03, 2003.
Descriptors:  cattle, goats, Mycobacterium avium subsp. paratuberculosis, isolate typing, Norway.

Djonne, B.  Paratuberculosis in goats - a special focus on the Nordic countries.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 257-259.  ISSN:  0044-605X.
NAL Call No.:  41.8 AC87
Descriptors:  goats, Johne’s disease, vaccination, animal pathogen, Mycobacterium avium subsp. paratuberculosis, clinical picture, histopathology, diagnosis, disease control and transmission, vaccination, Denmark, Finland, Iceland, Norway, Sweden, Scandanavian.  

Dohmann, K.; Strommenger, B.; Stevenson, K.; Gerlach, G.  Analysis of different Mycobacterium avium ssp. paratuberculosis specific DNA regions in M. avium ssp. paratuberculosis isolates of different host groupings.  Abstracts of the General Meeting of the American Society for Microbiology.  2003; 103: U-061.  ISSN:  1060-2011.  Note:  103rd American Society for Microbiology General Meeting, Washington, DC, USA; May 18-22, 2003.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, DNA analysis of 13 isolates, different host grouping, cattle, sheep, goat, human, PCR, high homology.

Dohmann, K.; Strommenger, B.; Stevenson, K.; de Juan, L.; Stratmann, J.; Kapur, V.; Bull, T.J.; Gerlach, G.F.  Characterization of genetic differences between Mycobacterium avium subsp. paratuberculosis type I and type II isolates.  Journal of Clinical Microbiology.  2003; 41(11): 5215-5223.  ISSN:  0095-1137.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=81
NAL Call No.:  QR46.J6
Descriptors:  cattle, sheep, Mycobacterium avium subsp. paratuberculosis, isolate differences, type I from sheep, type II from cattle, nucleotide sequences, genetic variations, molecular biology, molecular genetics, evolutionary hypothesis.

Englund, Stina.  IS900/ERIC-PCR as a tool to distinguish Mycobacterium avium subsp. paratuberculosis from closely related mycobacteria.  Veterinary Microbiology.  2003; 96(3): 277-287.  ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  Mycobacterium avium subsp. paratuberculosis, methods to separate closely related mycobacteria, strain typing, comparison study, rep PCR and conventional RFLP, genetic fingerprints, enterobacterial intergenic consensus (ERIC) sequence, MAP specific insertion sequence IS900, Mycobacterium avium subsp. avium, Mycobacterium intracellulare, other Mycobacterium species.

Ekbom, A.  Paratuberculosis and Crohn's disease - possible linkage?  Acta Veterinaria Scandinavica.  2003; 44(3/4): 267-268.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87
Descriptors:  humans, animals, Crohn’s disease, Mycobacterium avium subsp. paratuberculosis, disease prevalence, epidemiology, zoonotic potential, risk factors.

Fischer, O.A.; Matlova, L.; Bartl, J.; Dvorska, L.; Svastova, P.; Du Maine, R.; Melicharek, I.; Bartos, M.; Pavlik, I.  Earthworms (Oligochaeta, Lumbricidae) and mycobacteria.  Veterinary Microbiology.  2003; 91(4): 325-338.  ISSN: 0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Abstract:  The objective of the study was to define the role of earthworms in the survival of mycobacteria in animal populations.  In 13 sampling sites mycobacteria were detected in 53 (5.5%) samples of faeces and parenchymatous tissues from animals, in 25 (7.3%) environmental and in nine (8.2%) earthworm samples.  In cattle and goat farms affected by Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis) of IS900 restriction fragment length polymorphism (RFLP) type B-C1 was isolated from 37 (4.6%) faecal samples, three (1.4%) environmental and one (3.1%) earthworm sample.  Investigations of aviaries affected by avian tuberculosis detected M. avium of genotype IS901+ and IS1245+ in six (7.9%) bird's faecal and in four (4.4%) environmental samples. M. avium (genotype IS901- and IS1245+) was detected in four (4.4%) and M. abscessus in one (1.1%) environmental sample.  M. avium of genotype IS901- and IS1245+ and M. gastri were isolated from three (6.4%) earthworm samples.  In pig farm with mycobacteriosis M. avium of genotype IS901- and IS1245+ was detected in five (20.0%) faecal samples from pigs and in four (12.9%) environmental samples.  M. scrofulaceum was isolated in one (4.6%) sample of Lumbricus rubellus.  In laboratory experiments identical RFLP types of M. paratuberculosis were isolated from bodies and faeces of earthworms 1-2 days after the last contact with the faeces contaminated with the same RFLP type of M. paratuberculosis.  The results suggest that earthworms may become vectors of mycobacteria.
Descriptors:  earthworms, disease vectors, Mycobacterium avium subsp. paratuberculosis, mortality, fecal sampling, parenchyma, cattle, goats, pigs, farms, RFLP, Mycobacterium avium, contamination, Mycobacterium abscessus, Mycobacterium gastri, Mycobacterium scrofulaceum.

Fischer, O.A.; Matlova, L.; Dvorska, L.; Svastova, P.; Pavlik, I.   Nymphs of the Oriental cockroach (Blatta orientalis) as passive vectors of causal agents of avian tuberculosis and paratuberculosis.  Medical and Veterinary Entomology.  2003; 17(2): 145-150.  ISSN:  0269-283X.
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=mve%20
NAL Call No.:  RA639.M44
Descriptors:  Mycobacterium avium, Mycobacterium avium subsp paratuberculosis, disease vectors, Blatta orientalis, Oriental cockroach nymphs, experimental oral infection, isolated pathogens via RFLP, nymphs can have and shed viable and virulent mycobacteria, Czech Republic.

Fredriksen, B.; Jarp, J.  Factors affecting the herd level of antibodies against Mycobacterium avium subsp. paratuberculosis - a case-control study.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 283.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87
Descriptors:  dairy cattle, dairy herds, antibody survey, Johne’s disease prevalence, disease transmission, epidemiology, wild animals as disease reservoirs, risk factors, Norway.

Fridriksdottir, V.; Gunnarsson, E.; Sigurdarson, S.; Gudmundsdottir, K.B.  Paratuberculosis in Iceland - ongoing research.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 273.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87
Descriptors:  cattle, sheep, Mycobacterium avium subsp. paratuberculosis, Johne’s disease research program, disease control, diagnostic techniques.

Fus, M.M.; Szteyn, J.; Wiszniewska, A.; Herman, L.  Comparison of three methods of releasing DNA from Mycobacterium avium subsp. paratuberculosis cells.  Bulletin of the Veterinary Institute in Puawy.  2003; 47(1): 107-112.  ISSN:  0042-4870.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, DNA release methods, cell wall lysis, SDS, NaOH, sodium hydroxide, high and low temperatures, mini-bead beater.

Grant, I.R.; Kirk, R.B.; Hitchings, E.; Rowe, M.T.  Comparative evaluation of the MGITTM and BACTEC culture systems for the recovery of Mycobacterium avium subsp. paratuberculosis from milk.  Journal of Applied Microbiology.  2003; 95(1): 196-201.  ISSN:  1364-5072.
URL:  http://www.blackwellpublishing.com/journal.asp?ref=1364-5072%20
Descriptors:  Mycobacterium avium subsp. paratuberculosis, spiked milk, testing for bacterial contamination, methods, Mycobacterium Growth Indicator Tubes, MGITTM, BACTEC460TB culture system, detection comparison, culture media.

Grant, I.R.  Mycobacterium paratuberculosis and milk.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 261-266.  ISSN:  0044-605X.
NAL Call No.:  41.8 AC87
Descriptors:  cattle, humans, Mycobacterium avium subsp. paratuberculosis contaminated milk, research on the risk of transfer to humans, milk testing, bacterial can survive pasteurization, raw and commercial milk can be source of Mycobacterium avium subsp. paratuberculosi.

Groenendaal, H.  Controlling Johne's disease: results of computer modelling.  Cattle Practice.  2003; 11(4): 219-225.  ISSN:  0969-1251.
NAL Call No.:  SF961.C37
Descriptors:  dairy cattle, Mycobacterium avium subsp. paratuberculosis, "JohneSSim model" computer simulation model, evaluates economic and epidemiological 3 disease control strategies, 1) test and cull, 2) calf hygiene management, 3) vaccination, The Netherlands, United States.

Groenendaal, Huybert; Galligan, David T.  Economic consequences of control programs for paratuberculosis in midsize dairy farms in the United States.  Journal of the American Veterinary Medical Association.  2003; 223(12): 1757-1763.  ISSN:  0003-1488.
NAL Call No.:  41.8 AM3
Descriptors:  dairy herds, dairy farms, Mycobacterium avium subsp. paratuberculosis, disease prevalence, control programs, epidemiology, vaccination, paratuberculosis simulation models, vaccination.

Groenendaal, Huybert; Nielen, Mirjam; Hesselink, Jan Willem.  Development of the Dutch Johne's disease control program supported by a simulation model.  Preventive Veterinary Medicine.  2003; 60(1): 69-90.  ISSN:  0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  dairy cattle herds, beef cattle herds, Mycobacterium avium subsp. paratuberculosis, disease control, simulation model—JohneSSim, test and cull strategies, not economical, improved calf hygiene management, Paratuberculosis Program Netherlands (PPN), The Netherlands.

Gunnarsson, E.; Fridriksdottir, V.; Sigurdarson, S.  Control of paratuberculosis in Iceland.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 255.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87        
Descriptors:  cattle, sheep, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, diagnosis, mortality, disease prevalence, prevention, vaccination, disease transmission, Iceland.

Hanson, Timothy E.; Johnson, Wesley O.; Gardner, Ian A.; Georgiadis, Marios P.  Determining the infection status of a herd.  Journal of Agricultural Biological and Environmental Statistics.  2003; 8(4): 469-485.  ISSN:  1085-7117.
NAL Call No.:  S566.55.J68
Descriptors:  dairy herds, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, disease prevalence, hierarchical model, hypergeometric or binomial sample, animal screening data, variables, infection status of herd, diagnostic test accuracy, herd prevalence.

Hendrick, S.; Duffield, T.; Kelton, D.; Leslie, K.; Lissemore, K.; Archambault, M.  A relative comparison of diagnostic tests for Johne's disease.  Journal of Dairy Science.  2003; 86(Suppl. 1): 84-85.  ISSN:  0022-0302.  Note:  Joint Annual Meeting of the American Dairy Science Association, the American Society of Animal Science and the Mexican Association of Animal Production, Phoenix, Arizona, USA; June 22-26, 2003.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Descriptors:  cattle, Johne’s disease, diagnostic tests, comparison study.  

Hickey, S M.; Morris, C.A.; Dobbie, J.L.; Lake, D.E.  Heritability of Johne's disease and survival data from Romney and Merino sheep.  Proceedings of the New Zealand Society of Animal Production.  2003; 63: 179-182.  ISSN:  0370-2731.
NAL Call No.:  49.9 N483
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Merino sheep breed, Romney sheep breed, heritability of disease resistance, Johne’s disease susceptibility, quantitative genetics, not a very viable approach, AgResearch's Tokanui Station, New Zealand.

Hill, B.B.; West, M.; Brock, K.V.  An estimated prevalence of Johne's disease in a subpopulation of Alabama beef cattle.  Journal of Veterinary Diagnostic Investigation.  2003; 15(1): 21-25.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  beef cattle, estimate the overall prevalence of animals infected with Mycobacterium avium subsp. paratuberculosis, antibody testing of sera, 79 beef herds in Alabama Brucellosis Certification program, ELISA test, disease prevalence, disease surveys, 50% of the herds infected with MAP, overall prevalence of 8%, Alabama, United States. 

Hines, Murray E. II.  Preliminary characterization of chemically generated Mycobacterium avium subsp. paratuberculosis cell wall deficient forms (spheroplasts).  Veterinary Microbiology.  2003; 95(4): 247-258.  ISSN:  0378-1135.
URL: http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8%20
NAL Call No.:  SF601.V44
Descriptors:  Mycobacterium avium subsp. paratuberculosis, cell wall deficient forms, Crohn's disease, humans, immune response, pathogenesis, ultrastructure, Johne’s disease, cattle.

Holliman, A.  Restocking problems post-FMD.  Cattle Practice.  2003; 11(4): 311-312.  ISSN:  0969-1251.
NAL Call No.:  SF961.C37
Descriptors:  cattle, restocking after depopulations due to FMD, importation of heifers, disease transmission from outside, lack of biosecurity to prevent diseases transferred, tuberculosis, BVD, IBR, Johne’s disease, United Kingdom.

Holmstrom, A.; Kyhlstedt, U.; Robertsson, J.A.; Stengarde, L.  Control of paratuberculosis in Sweden.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 285-286.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87
Descriptors:  beef cattle, Johne’s control programs, disease prevalence, Sweden.

Holstad, G.; Sigurdardottir, O.; Valheim, M.; Storset, A.; Olsen, L.; Halldorsdottir, S.; Djonne, B.; Fredriksen, B.  Mycobacterium avium subspecies paratuberculosis - a review of present research in Norway.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 269-272.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87
Descriptors:  cattle, goats, sheep, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, animal disease research, epidemiology, disease transmission, diagnostics, Johne’s disease research in Norway.

Horwood, P.; McGowan, M.; Orpin, P.; Thompson, I.; Brownlie, J.  Evaluation of two ELISA's for the detection of Mycobacterium avium paratuberculosis antibodies in milk samples from dairy cattle.  Cattle Practice.  2003; 11(3): 147-149.  ISSN:  0969-1251.
NAL Call No.:  SF961.C37
Descriptors:  dairy cattle, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, identify an accurate and cost effective test, comparing testing sera and milk, available ELISA assays, United Kingdom.

Hostetter, J.; Steadham, E.; Haynes, J.; Bailey, T.; Cheville, N.  Phagosomal maturation and intracellular survival of Mycobacterium avium subspecies paratuberculosis in J774 cells.  Comparative Immunology Microbiology and Infectious Diseases.  2003; 26(4): 269-283.  ISSN:  1085-7117.
URL:    http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5003&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=d84c7d4df471489f36fcab6d30fb7920
NAL Call No.:  QR180.C62
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Mycobacterium smegmatis, inhibition of phagosomal maturation, bacteria reside in phagosomal component of non-mature phagolysome, macrophages, surface proteins, bacterial survival, transferring, zymosan.

Huda, A.; Lind P.; Christoffersen, A.B.; Jungersen, G.  Analysis of repeated tests for interferon-gamma (IFN-gamma) response and faecal excretion for diagnosis of subclinical paratuberculosis in Danish cattle.  Veterinary Immunology and Immunopathology.  2003; 94(3-4): 95-103.  ISSN:  0165-2427.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776
NAL Call No.:  SF757.2.V38
Descriptors:  425 dairy cattle, 10 infected and 5 non-infected dairy herds, Mycobacterium avium subsp. paratuberculosis, 3 consecutive samplings, whole blood, fecal culture, diagnosis, diagnostic techniques, INF-gamma, IDEXX-criteria, recommendations for test use and sensitivity, interferon, paratuberculosis, Denmark.

Huda, A.; Jensen, H.E.  Comparison of histopathology, cultivation of tissues and rectal contents, and interferon-gamma and serum antibody responses for the diagnosis of bovine paratuberculosis.  Journal of Comparative Pathology.  2003; 129(4): 259-267.  ISSN:  0021-9975.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6861&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=6091bef4d15aae1adbceffba708c6eb8%20
NAL Call No.:  41.8 J82
Descriptors:  cattle, infected and non-infected dairy herds, Mycobacterium avium subsp. paratuberculosis, immune response, interferon, antibodies, diagnosis, diagnostic techniques, histopathology of tissues, culture of serial rectal contents, testing blood for IFN gamma and antibody responses, large intestine, small intestine tissue samples, mesemteric lymph nodes, pharyngeal tonsil, retropharyngeal, mediastinal, hepatic and supramammary lymphoid sampling, lymphnodes draining jejunum, tissue culture.

Huda, A.; Jungersen, G.; Christoffersen, A.B.; Lind, P.  Diagnosis of bovine paratuberculosis by interferon-gamma (IFN- gamma ) test.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 281.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, diagnosis with interferon-gamma, immunodiagnosis.

Inglis, Neil F.; Stevenson, Karen; Heaslip, Darragh G.; Sharp, J. Michael.  Characterisation of IS901 integration sites in the Mycobacterium avium genome.  FEMS Microbiology Letters.  2003; 221(1): 39-47.  ISSN:  0378-1097.
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=fml
NAL Call No.:  QR1.F44
Descriptors:  Mycobacterium avium, strains, cervine strain JD88/118 and IS901, identification and characterization, 17 chromosomal integration loci of element IS901, IS900, IS901 inserts preferentially between a putative ribosome-binding sequence (RBS) and translational start codon of an open reading frame (ORF).

Jessep, T.  Keeping bovine Johne's off your property.  Agnote NSW Agriculture.  2003; (DAI-50 (2nd Edition)): 1-4.  ISSN:  1034-6848.
URL:  http://www.agric.nsw.gov.au/reader/585
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, disease prevention and control, New South Wales, Australia.

Jungersen, G.  Infektionsforlob og immunologisk diagnostik ved paratuberkulose.  [The course of infection and the immunological diagnosis of paratuberculosis.]  Dansk Veterinaertidsskrift.  2003; 86(4): 6-10.  ISSN:  0106-6854.  Note:  In Danish.  
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, symptoms, 5 stages of course of infection outlined, immune response, immunological techniques, diagnosis, diagnostic tests for different for each stage of the disease, bacteria in feces, antibodies in blood serum, measurement cell mediated immune response, interferon-gamma test for screening, ELISA rapid indication of defective immune response.

Jungersen, G.  Ongoing research on paratuberculosis in Denmark 2001.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 279-280.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, pathogenesis, epidemiology, diagnostic related research, disease prevalence, disease transmission, research programs, Denmark.

Kalis, C.H.J.; Collins, M.T.; Hesselink, J.W.; Barkema, H.W.  Specificity of two tests for the early diagnosis of bovine paratuberculosis based on cell-mediated immunity: the Johnin skin test and the gamma interferon assay.  Veterinary Microbiology.  2003; 97(1/2): 73-86.  ISSN:  0378-1135.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  dairy cows, Mycobacterium avium subsp. paratuberculosis, assays for cell mediated immunity, looking for early diagnosis, Johnin skin test, IFN gamma test, diagnostic tests.

Kennedy, James A.  Methodology and Computer Modeling of Pooled Fecal Cultures to Determine Herd Status of Johne's Disease in Beef Cattle.  2003; viii, 60 p., ill.  Note:  Thesis (M.S.).  University of Nebraska, Lincoln, Nebraska.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, beef cattle, disease status of herd, pooled fecal cultures, computer model, methods, Nebraska.

Khare, S.; Zhang, S.; Nunes, J.E.S.; Figueiredo, J.F.; Ficht, T.A.; Rice-Ficht, A.C.; Adams, L.G.  Bovine ligated ileal loop infected with Mycobacteium avium subspecies paratuberculosis: Ultrastructural analysis of Peyer's patches and early changes in gene expression profiles of C-C cytokines and C-X-C cytokine.  Abstracts of the General Meeting of the American Society for Microbiology.  2003; 103: Z-007.  ISSN:  1060-2011.  Note:  103rd American Society for Microbiology General Meeting, Washington, DC, USA; May 18-22, 2003.
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, interaction between intestinal mucus and pathogen, bovine ligated ileal, injected with live pathogen, pathogen uptake, times sampling post infection, real time PCR, invasion of Peyer’s patches.

Klausen, Joan; Huda, Anna; Ekeroth, Lars; Ahrens, Peter.  Evaluation of serum and milk ELISAs for paratuberculosis in Danish dairy cattle.  Preventive Veterinary Medicine.  2003; 58(3-4): 171-178.  ISSN:  0167-5877.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  580 dairy cows, 6 dairy herds with MAP, 2 dairy herds negative for Johne’s disease, Mycobacterium avium subsp. paratuberculosis, blood serum sampling, milk comparison study, diagnostic methods, analytical methods, antibody testing, ELISA and complement fixation tests, fecal sample culture, disease prevalence, immunological techniques, paratuberculosis.

Kruip, T.A.M.; Muskens, J.; van Roermund, H.J.W.; Bakker, D.; Stockhofe-Zurwieden, N.  Lack of association of Mycobacterium avium subsp. paratuberculosis with oocytes and embryos from moderate shedders of the pathogen.  Theriogenology.  2003; 59 (7): 1651-1660.  ISSN: 0093-691X.
NAL Call No.:  QP251.A1T5
Abstract:  Paratuberculosis is a chronic and progressive disease of the intestine in ruminants caused by Mycobacterium avium subsp. paratuberculosis (Map).  The bacterium is transmitted to young animals, becomes manifest in adulthood and leads to economic losses.  The aim of this study is to investigate if cows shedding Map possess oocytes and embryos that are carriers of the bacterium.  New genetical material can enter the dairy farm using embryo transfer but the question as to whether this technique is safe with respect to transmission of paratuberculosis has yet to be addressed.  We selected and bought 16 cows, all proven to be moderate shedders of the bacterium in the faeces immediately prior to the experiment but none were clinically sick.  One sample of uterine content was collected from each animal by flushing the uterus on the day of heat and five samples of homogenised uterine tissue were collected on the eighth day of the same cycle by biopsy.  In addition, 217 cumulus-oocyte complexes (COCs), ranging from 3 to 35 COCs per animal, were collected using ultrasound guided transvaginal puncture of the ovarian follicles (OPU).  On the seventh day of the subsequent cycle 31 embryos were obtained using the classic technique of super ovulation induction, artificial insemination (AI), followed by flushing of the uterus.  These embryos have been washed and trypsinised.  Fourteen of the 16 cows were treated again for super ovulation in the subsequent cycle and 19 foetuses were collected by opening of the uterus after euthanasia on Days 35-49 of the cycle.  All samples were cultured for presence of Map and checked every 2 months during 1 year for bacterial growth.  None of the samples showed growth of Map after 12 months of culture.  Pathological examination of the cows revealed different degrees of severity of pathological alterations of the intestinal tract and mesenteric lymph nodes. However, the results suggest that neither in vivo embryo's nor oocytes are carriers of the bacteria and do not form an extra risk at transfer.  However, due to the limited size of the experiment (sample size of 16 cows), a certain margin for error remains.
Descriptors:  dairy cows, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, chronic diseases, disease transmission  transplacental transmission, embryo transfer, superovulation, embryo animal, cell culture, lymphadenitis, enteritis, histopathology, disease course, cattle diseases, vertical transmission, embryo donors, The =Netherlands.

Kudahl, A.; Nielsen, S.S.; Sorensen, J.T.  Effects of paratuberculosis on productivity in Danish dairy cows.  Acta Veterinaria Scandinavica Supplementum. 2003; (suppl. 98): 274.  ISSN: 0065-1699.  Note.  J.F. Agger and N. Toft edited the special issue. 
Descriptors:  dairy cows, effects of Johne’s disease, Mycobacterium avium subsp. paratuberculosis, age at first calving, lactation, milk yields, protein content, culling, slaughter weights, Denmark.

Lage, Susanne Zur; Goethe, Ralph; Darji, Ayub; Valentin Weigand, Peter; Weiss, Siegfried.  Activation of macrophages and interference with CD4+ T-cell stimulation by Mycobacterium avium subspecies paratuberculosis and Mycobacterium avium subspecies avium.  Immunology.  2003; 108(1): 62-69.  ISSN:  0019-2805.
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=imm
NAL Call No.:  448.3 IM6:
Descriptors:  mice, animal disease model, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, macrophages, CD4+ T lymphocytes, cytokines, disease models, immune response, major histocompatibility complex.

Lillini, E.; Macri, G.; Fagiolo, A.; Cersini, A.  Efficiency of laboratory methods in a bovine herd affected by Johne's disease.  In:  Thanawongnuwech, R.; Ingkaninun, P. [Editors]  Proceedings 11th International Symposium of the World Association of Veterinary Laboratory Diagnosticians and OIE Seminar on Biotechnology, Bangkok, Thailand, 9-13 November, 2003.  Published by the Thai Veterinary Medical Association.  Bangkok.  2003; O36-O37.  ISBN:  9741325894.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, diagnosis, efficiency of diagnostic techniques, disease prevalence, epidemiology, immunological techniques, PCR, Italy.  

Lesser, A.  Paratuberkulose: Ein weit verbreitetes Problem in Rinderbestnden.  [Paratuberculosis. A very widespread problem in dairy herds.]  Milchpraxis.  2003; 41(4): 172-175.  ISSN:  0343-0200.  Note:  In German.  
NAL Call No.:  SF221 M5
Descriptors:  dairy calves, neonates, dairy cows, colostral immunity, Mycobacterium avium subsp. paratuberculosis, disease prevention, disease prevalence, Germany.

Lipiec, Marek.  Paratuberkuloza jako zoonoza.  [Paratuberculosis as a zoonosis.] Medycyna Weterynaryjna.  2003; 59(3): 191-194.  ISSN:  0025-8628.  Note:  In Polish.
NAL Call No.:  41.8 M463
Descriptors:  Mycobacterium avium subsp. paratuberculosis, potential as a zoonotic disease via contaminated milk and milk products, Crohn's disease, humans, review. 

Lucas, J.N.; Cousins, D.V.; Mills, A.J.; Van Wijk, J.G.A.  Identification of Mycobacterium avium subsp avium in an alpaca with lesions resembling paratuberculosis.  Australian Veterinary Journal.  2003; 81(9): 567-569.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  alpacas, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, case reports, clinical aspects, diagnosis, identification, histopathology, paratuberculosis.

Mackintosh, C.G.; Wilson, P.R.  Impact of diseases on the NZ deer industry.  Proceedings of the New Zealand Society of Animal Production.  2003; 63: 262-268.  ISSN:  0370-2731.
NAL Call No.:  49.9 N483
Descriptors:  deer farming, farmed deer industry, economic impacts of diseases, animal health care costs, clinical and subclinical disease states, disease control and prevention, better disease screening technologies, nutritional deficiencies and toxicities, bacterial diseases, leptospirosis, malignant catarrhal fever, nematode parasites, bovine tuberculosis, Johne’s disease, New Zealand.

Manning, Elizabeth J.B.; Augenstein, Monica; Collins, Michael T.; Nelson, Kathryn M.  Case report: Johne's disease: The recipient risk.  Bovine Practitioner.  2003; 37(1): 20-22.  ISSN:  0524-1685.  Note:  In English with a French summary.
NAL Call No.:  SF779.5.A1B6
Descriptors:  calves, cows, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, embryo transfer, intrauterine transmission, became test positive during pregnancy, calf diagnosed 2 years later, no postnatal exposure, vertical transmission concerns, case reports, Wisconsin, United States.

Manning, E.J.B.; Steinberg, H.; Krebs, V.; Collins, M.T.  Diagnostic testing patterns of natural Mycobacterium paratuberculosis infection in pygmy goats.  Canadian Journal of Veterinary Research.  2003; 67(3): 213-218.  ISSN:  0830-9000.  Notes:  In English with a French summary.  
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=133
NAL Call No.:  SF601.C24
Descriptors:  13 pigmy goats, Capra hircus, naturally infected herd, Mycobacterium avium subsp. paratuberculosis, 4 diagnostic assays, gamma interferon (IFN gamma), serum antibody ELISA and agar gel diffusion (AGID), radiometric fecal culture, tissues collected at necropsy, isolates confirmed with IS900 PCR, false positives and false negatives, need to use multiple tests.

Manning, Elizabeth J.B.; Kucera, Thomas E.; Gates, Natalie B.; Woods, Leslie M.; Fallon McKnight, Maura.  Testing for Mycobacterium avium subsp. paratuberculosis infection in asymptomatic free-ranging tule elk from an infected herd.  Journal of Wildlife Diseases.  2003; 39(2): 323-328.  ISSN:  0090-3558.
URL:  http://www.jwildlifedis.org/
NAL Call No.:  41.9 W64B
Descriptors:  45 tule elk, free ranging asymptomic animals, Cervus elaphus nannodes, Mycobacterium avium subsp. paratuberculosis, ELISA, agar gel immunodiffusion assay (AGID), fecal culture, 22 elk showed MAP, 10 of 22 euthanazed animals had histopathologic lesions, immunodiffusion, Point Reyes National Seashore, Marin County, California, United States.

Mercier, P.  Sante: la paratuberculose caprine.  [Paratuberculosis in goats.]  Chevre.  2003; (254): 30-31.  ISSN:  0045-6608.  Note:  In French.
Descriptors:  goats, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, symptoms, lesions, bacteriology, epidemiology, economic costs, methods of reducing incidence, culling of sick animals, separation of kids, disinfection of buildings and pastures.

Mork, Tormod; Heier, Berit Tafjord; Alvseike, Kristin Ruud; Lund, Arve.  Overvakings- og kontrollprogrammer for landdyr, fisk og skjell i Norge med vekt pa BSE, salmonella, og paratuberkuloseprogrammene.  [Surveillance and control programs for terrestrial and aquatic animals in Norway for BSE, salmonella, and paratuberculosis.]  Norsk Veterinaertidsskrift.  2003; 115(11): 707-717.  ISSN:  0332-5741.  Note:  In Norwegian
Descriptors:  terrestrial and aquatic animals, bovine spongiform encephalopathy, BSE, Mycobacterium avium subsp. paratuberculosis, Salmonella, disease control, epidemiological surveys, Norway.

Morris, C.A.; Hickey, S.M.; Dobbie, J.L.; Lake, D.E.  A breed difference between Romneys and Merinos in the incidence of Johne's disease on a New Zealand farm.  50 Years of DNA: Proceedings of the Fifteenth Conference, Association for the Advancement of Animal Breeding and Genetics, Melbourne, Australia, 7-11 July 2003.  2003: 399.  ISBN:  0958629927.
Descriptors:  sheep breeds, Romneys, Merinos, breed differences, crossbreds, disease prevalence of Johne’s disease, epidemiology, New Zealand.

Motiwala, A.S.; Strother, M.; Amonsin, A.; Byrum, B.; Naser, S.A.; Stabel, J.R.; Shulaw, W.P.; Bannantine, J.P.; Kapur, V.; Sreevatsan, S.  Molecular epidemiology of Mycobacterium avium subsp. paratuberculosis: evidence for limited strain diversity, strain sharing, and identification of unique targets for diagnosis.  Journal of Clinical Microbiology.  2003; 41(5): 2015-2026.  ISSN:  0095-1137.  
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?iid=4818
NAL Call No.:  QR46.J6
Descriptors:  Mycobacterium avium subsp. paratuberculosis, molecular diversity of animal and human strains, US isolates, sheep, cows, Johne’s disease (203 isolates), human Crohn’s disease (7 isolates), searching for specific diagnostic molecular markers, multiplex PCR of IS900 integration loci (MPIL) and amplified fragment length polymorphism (AFLP) analyses, DNA fingerprinting, identified a high degree of genetic similarity between cow strains, relatively higher degree of genetic heterogeneity among human and ovine strains.

Motiwala, A.S.; Strother, M.; Manning, E.; Sreevatsan, S.  Restricted diversity within Mycobacterium avium subsp. paratuberculosis isolated from exotic animal species from diverse geographic locations.  Abstracts of the General Meeting of the American Society for Microbiology.  2003; 103: U 039.  ISSN:  1060-2011.  Note:  103rd American Society for Microbiology General Meeting, Washington, DC, USA; May 18-22, 2003.
Descriptors:  cattle, captive and free ranging wildlife, bison, duiker, elk, gnu, nyala, impala, and oryx, survey, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, radiometric culture of fecal and tissue samples, 16 isolates, ATCC19698, broth cultures, DNA molecular markers, IS900, Mycobacterium avium subsp. paratuberculosis locus 251, HSP 65, IS1311, restriction endomuclease analyses, single monomorphic clone of Mycobacterium avium subsp. paratuberculosis widespread dissemination for cross species, United States.

Muehlherr, J.E.; Zweifel, C.; Corti, S.; Blanco, J.E.; Stephan, R.  Microbiological quality of raw goat's and ewe's bulk-tank milk in Switzerland.  Journal of Dairy Science.  2003; 86(12): 3849-3856.  ISSN:  0022-0302.  
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Descriptors:  dairy goats, dairy sheep, testing raw bulk milk, plate counts, Enterobacteriaceae counts, Staphylococcus aureus, Campylobacter spp., Shiga toxin producing Escherichia coli, Salmonella spp., and Mycobacterium avium subsp. paratuberculosis, risk assessment program for milk from small ruminants, Switzerland.

Mullerad, J.; Hovav, A.H.; Nahary, R.; Fishman, Y.; Bercovier, H.  Immunogenicity of a 16.7 kDa Mycobacterium paratuberculosis antigen.  Microbial Pathogenesis.  2003; 34(2): 81-90.  ISSN:  0882-4010.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6954&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=0ce0cc81f81ede9640040947d652abf1
NAL Call No.:  QR175.M53
Descriptors:  mice as laboratory animal models, Mycobacterium avium subsp. paratuberculosis, adjuvants, immune response, interferon, antigens biochemistry, delayed type hypersensitivity, vaccination, immunization interleukin 10, interleukin 6, nitric oxide, oxidoreductases, peroxidases, splenocytes.

Muskens, J.; Elbers, A.R.W.; van Weering, H.J.; Noordhuizen, J.P.T.M.  Herd management practices associated with paratuberculosis seroprevalence in Dutch dairy herds.  Journal of Veterinary Medicine Series B.  2003; 50(8): 372-377.  ISSN:  0931-1793
URL:  http://www.blackwellpublishing.com/journal.asp?ref=0931-1793&site=1
NAL Call No.:  41.8 Z52
Descriptors:  dairy cows, 370 dairy herds, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, epidemiology, disease prevention and control, management practices, questionnaire study, risk factors, serological surveys, seroprevalence, comparison between seropostive and seronegative herds, The Netherlands.

Muskens, J.; Mars, M.H.; Elbers, A.R.W.; van Maanen, K.; Bakker, D.  The results of using faecal culture as confirmation test of paratuberculosis-seropositive dairy cattle.  Journal of Veterinary Medicine Series B.  2003; 50(5): 231-234.  ISSN:  0931-1793.
URL:  http://www.blackwellpublishing.com/journal.asp?ref=0931-1793&site=1
NAL Call No.:  41.8 Z52
Descriptors:  15,822 dairy cattle, 378 herds, ELISA, Mycobacterium avium subsp. paratuberculosis, ages 3-6 year, age differences, confirmatory tests, fecal culture, disease control and prevention, serology, vaccination.

National Research Council (U.S.) Committee on Diagnosis and Control of Johne's Disease. Diagnosis and Control of Johne's Disease.  National Academies Press, Washington, DC. c2003; xiv, 229 p., ill.  ISBN: 0309086116; 030950628X (PDF)
URL:  http://www.nap.edu/books/0309086116/html/
NAL Call No.:  SF809.P375 D52 2003
Descriptors:  diagnosis, paratuberculosis, treatment, Mycobacterium avium subsp. paratuberculosis, various methodologies.

Nielsen, S.S.; Toft, N.; Houe, H.; Enevoldsen, C.  Paratuberkulose som sandsynlighedsdiagnose - Brug af diagnoser - simple go komplekse.  [Probability diagnosis of paratuberculosis: use in diagnosis - simple or complex.]  Dansk Veterinaertidsskrift.  2003; 86(8): 6-10.  ISSN:  0106-6854.  Note:  In Danish with an English summary.  
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, diagnostic techniques, Johne’s disease, decision support system for diagnosis of complex disease, computer model, animal characteristics.

Nielsen, S.S.  Possibilities for intervention against paratuberculosis in Danish dairy herds.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 289-290.  ISSN:  0044-605X.
NAL Call No.:  41.8 AC87
Descriptors:  dairy cattle, dairy herds, ELISA diagnostic techniques, Mycobacterium avium subsp. paratuberculosis, disease control programs, disease prevention, Denmark.

Nielsen, S.S.; Agger, J.F.  Comparison of milk and serum enzyme-linked immunosorbent assays adjusted for time-related factors for the detection of paratuberculosis in dairy cattle.  Acta Veterinaria Scandinavica, Supplementum.  2003; (Suppl. 98): 239.  ISSN:  0065-1699.  Note:  J.F. Agger and N. Toft edited the special issue.
NAL Call No.:  41.8 AC87 Suppl.
Descriptors:  dairy cattle, Johne’s disease, antibodies, milk, diagnosis, Mycobacterium avium subsp. paratuberculosis, diagnostic techniques, ELISA, immune serum.

Olsen, I.; Johansen, T.B.; Bilman-Jacobe, H.; Nilsen, S.F.; Djonne, B.  A novel IS element, ISMpa1, in Mycobacterium avium subsp. paratuberculosis.  FEMS Congress of European Microbiologists Abstract Book.  2003; (1): 60.  Note:  1st Federation of European Microbiological Societies (FEMS) Congress of European Microbiologists, Ljubljana, Slovenia; June 29-July 03, 2003.  
Descriptors:  Mycobacterium avium subsp. paratuberculosis, IS element, ISMpal.

Ostrowski, M.; Mundo, S.L.; Harris, N.B.; Barletta, R,G.; Lopez, O.J.  B-cell epitopes in the immunodominant p34 antigen of Mycobacterium avium ssp. paratuberculosis recognized by antibodies from infected cattle.  Scandinavian Journal of Immunology.  2003; 58(5): 511-521.  ISSN:  0300-9475.   
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=sji
NAL Call No.:  QR180.S3
Descriptors:  cattle, infected animals, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, immune response, antigens, bacteriophages, amino acid sequences, antibodies, B lymphocytes epitopes, immune response, peptides, surface protein p34, T helper 1 (Th1) to a Th2 profile.

Ozbek, Ahmet; Michel, Frederick C. Jr. ; Strother, Megan; Motiwala, Alifiya S.; Byrum, Beverly R.; Shulaw, William P.; Thornton, Charles G.; Sreevatsan, Srinand.  Evaluation of two recovery methods for detection of Mycobacterium avium subsp. paratuberculosis by PCR: Direct-dilution-centrifugation and C18-carboxypropylbetaine processing.  FEMS Microbiology Letters.  2003; 229(2): 145-151.  ISSN:  0378-1097.  
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=fml
NAL Call No.:  QR1.F44
Descriptors: :  cattle, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, assays, diagnostic assays, asymptomatic infections, PCR, IS900 integration sites, feces sampling, 2 recovery methods, direct dilution centrifugation method, C18 carboxypropylbetaine (CB-18) based method, sensitive for subclinical animals, diagnosis, diagnostic techniques.

Pak, S.I.; Kim, D.; Salman, M.  Estimation of paratuberculosis prevalence in dairy cattle in a province of Korea using an enzyme-linked immunosorbent assay: application of Bayesian approach.  Journal of Veterinary Science.  2003; 4(1): 51-56.  ISSN: 1229-845X.
URL:  http://www.ksvs.or.kr/
NAL Call No.:  SF604.J68
Descriptors:  dairy cows, cattle diseases, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, bacterial infections, disease prevalence, screening, antibody detection, disease detection, ELISA, epitopes, recombinant proteins, accuracy, statistical analysis, Bayesian theory, Korea Republic.

Paolicchi, F.A.; Zumarraga, M.J.; Gioffre, A.; Zamorano, P.; Morsella, C.; Verna, A.; Cataldi, A.; Alito, A.; Romano, M.  Application of different methods for the diagnosis of paratuberculosis in a dairy cattle herd in Argentina.  Journal of Veterinary Medicine Series B.  2003; 50(1): 20-26.  ISSN:  0931-1793.
URL:  http://www.blackwellpublishing.com/journal.asp?ref=0931-1793&site=1
NAL Call No.:  41.8 Z52
Descriptors:  cows, dairy cattle, dairy cows, dairy herds, Mycobacterium avium subsp. paratuberculosis, various strains, interferon, diagnosis, diagnostic techniques, ELISA, immunodiffusion, PCR, methodology, paratuberculosis, Argentina.

Patel, D.; Goddik, L.; Bermudez, L.  Invasion of Mycobacterium avium subsp paratuberculosis in bovine epithelial cells and bovine mammary epithelial cells.  Journal of Dairy Science.  2003; 86(Suppl. 1): 8.  ISSN:  0022-0302.  Note:  Joint Annual Meeting of the American Dairy Science Association, the American Society of Animal Science and the Mexican Association of Animal Production, Phoenix, Arizona, USA; June 22-26, 2003. 
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Descriptors:  Mycobacterium avium subsp. paratuberculosis, bovine epithelial cells, bovine mammary epithelial cells, cell invasion by bacterial pathogen. 

Payne, T.E.; Guillou, L. III; Awong Taylor, J.  A comparison of methods for detection of Mycobacterium paratuberculosis in bovine milk by IS900 PCR.  Abstracts of the General Meeting of the American Society for Microbiology.  2003; 103: U-026.  ISSN:  1060-2011.  Note:  103rd American Society for Microbiology General Meeting, Washington, DC, USA; May 18-22, 2003.
Descriptors:  bovine milk, method for detection, IS900PCR, Mycobacterium avium subsp. paratuberculosis, an isolation and concentration method utilizing Cetyltrimethylammonium Bromide (CTAB), pasteurized and unpasteurized milk.  

Pence, M.; Baldwin, C.; Black, C.C., III.  The seroprevalence of Johne's disease in Georgia beef and dairy cull cattle.  Journal of Veterinary Diagnostic Investigation.  2003; 15(5): 475-477.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  beef cattle, dairy cattle, culled animals, sale barns sales, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, epidemiology, 5307 sera of 200,000 were tested, ELISA test kit, levels of Johne’s disease culled animals was economically significant, Georgia, United States.

Pilipcinec, E.; Svicky, E.; Pistl, J.; Dorko, E.; Bugarsky, A.  Ochorenia lymfatickeho systemu vyvolane primarne bakteriami a plesnami. [Diseases of the lymph system caused primarily by the bacteria and moulds.]  Slovensky Veterinarsky Casopis.  2003; 28(3): 34-39.  ISSN:  1335-0099.  Note:  In Czech with an English summary.
Descriptors:  pigs, cats, horses, sheep, goats, other domestic animals, pathogens of the lymph system, zoonotic diseases, Corynebacterium pseudotuberculosis, Streptococcus equi subsp. equi, Rhodococcus equi, Streptococcus porcinus, Streptococcus canis, Histoplasma capsulatum subsp. farciminosum, Sporothrix schenckii, Streptococcus equi subsp. zooepidemicus, Yersinia pseudotuberculosis, Y. enterocolitica, Burkholderia mallei, B. pseudomallei, Mycobacterium avium subsp. paratuberculosis, Mycobacterium spp., Actinomyces spp., Nocardia spp., Aspergillus spp., Staphylococcus aureus, Actinobacillus equuli, Actinobacillus suis, Arcanobacterium pyogenes.   

Pislak, M.; Ocepek, M.; Piano, J.Z.; Pogacnik, M.  Comparison of four methods for isolation of Mycobacterium avium subsp. paratuberculosis DNA from tissue samples.  Slovenian Veterinary Research.  2003; 40(2): 91-97.  ISSN:  1581-6915.  Note:  In English with a summary in Slovenian.
Descriptors:  11 positive small ruminants, sheep, Mycobacterium avium subsp. paratuberculosis, 30 intestinal and lymph node samples, 4 methods of DNA extraction: (1) High Pure PCR Template Preparation Kit, Roche, Mannheim commercial kit; (2) treatment of samples with HPC (hexadecylpyridinium chloride) and isolation and kit; (3) Gwozdz’s method of digestion with proteinase K adding NaCl and cetyltrimethylammonium bromide (CTAB); (4) treatment with HPC and isolation with the method described by Gwozdz, method 2 was most efficient.

Pons, L. Sequencing the bad guys.  Agricultural Research.  2003; 51(4): 19.  ISSN: 0002-161X.
URL:  http://www.ars.usda.gov/is/AR/archive/apr03/bact0403.htm
NAL Call No.:  1.98 AG84
Descriptors:  cattle diseases, sequence analysis, nucleotide sequences, Mycobacterium avium subsp. paratuberculosis, Brucella melitensis biovar abortus, Leptospira interrogans serovar hardjo.

Radunz, B.  Johne's disease. Agdex no: 420/653.  Agnote Northern Territory of Australia.  2003; (K30): 2.  ISSN:  0157-8243.  
Descriptors:  buffalo, camelids, cattle, deer, goats, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, symptoms, spread, detection, incidence, disease transmission, mortality, epidemiology, Northern Territory, Australia.

Rajkhowa, S.; Rajkhowa, C.; Bujarbaruah, K.M.  Diseases of mithun (Bos frontalis) - a review.  Veterinary Bulletin.  2003; 73(4): 1R-6R.  ISSN:  0042-4854.
Descriptors:  mithun, Bos frontalis, animal diseases, foot and mouth disease, catarrhal fever, rinderpest, bacterial diseases, Mycobacterium avium subsp. paratuberculosis, bronchopneumonia by Pseudomonas spp., black quarter, Clostridium chauvoei, anthrax and brucellosis, nutritional edema, parasitoses, theileriasis, reviews.  

Reddacliff, L.A.; Whittington, R.J.  Culture of pooled tissues for the detection of Mycobacterium avium subsp. paratuberculosis infection in individual sheep.  Australian Veterinary Journal.  2003; 81(12): 766-767.  ISSN:  0005-0423
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, tissue homogenates, the terminal ileum (TI), ileocaecal valve (ICV), mesenteric lymph nodes (MLN), Mycobacterium avium subsp. paratuberculosis, samples pooled for each sheep, freezing and thawing, experimental infection, tissue culture, pooled as alternative to individual tissue analysis.

Reddacliff, L.A.; Vadali, A.; Whittington, R.J.  The effect of decontamination protocols on the numbers of sheep strain Mycobacterium avium subsp. paratuberculosis isolated from tissues and faeces.  Veterinary Microbiology.  2003; 95(4): 271-282.  ISSN:  0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  Mycobacterium avium subsp. paratuberculosis, sheep strain, animal tissues, clinical samples, spiking tissues and feces, decontamination, culture techniques.

Reddacliff, L.A.; Whittington, R.J.  Experimental infection of weaner sheep with S strain Mycobacterium avium subsp. paratuberculosis.  Veterinary Microbiology.  2003; 96(3): 247-258.  ISSN:  0378-1135. 
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8
NAL Call No.:  SF601.V44
Descriptors:  recently weaned Merino lambs, sheep, experimental infection, Mycobacterium avium subsp. paratuberculosis, Australian S strain, oral doses similar to natural exposure, detection time, humoral immunity, interferon, pathogenesis, tissue culture, skin testing, skin testing, intradermal Johnin, whole blood IFN-gamma.

Reddacliff, Leslie A.; Nicholls, Paul J.; Vadali, Aparna; Whittington, Richard J.  Use of growth indices from radiometric culture for quantification of sheep strains of Mycobacterium avium subsp. paratuberculosis.  Applied and Environmental Microbiology.  2003; 69(6): 3510-3516.  ISSN:  0099-2240.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=83
NAL Call No.:  448.3 AP5
Abstract:  A simple method for using growth indices from radiometric BACTEC cultures was evaluated for the enumeration of Australian sheep strains of Mycobacterium avium subsp. paratuberculosis.  The numbers of viable organisms in inocula were determined by end-point titration in BACTEC cultures.  Growth indices were measured by using a BACTEC 460 machine.  There was a linear relationship between the number of days taken for the cumulative growth index to reach 1,000 (dCGI1000) and log10 inoculum size.  The use of dCGI1000 was shown to be as effective as the use of growth index data from the entire growth cycle for the estimation of inoculum size.  For particular isolates characterized by end-point titration, the dCGI1000 of a single BACTEC vial provided estimates of viable numbers within narrow prediction limits.  Predictive relationships were also established for the enumeration of M. avium subsp. paratuberculosis from field samples by using the dCGI1000 of a single BACTEC vial, with prediction limits of ½1 to 2 log units.  Organisms from feces or contaminated soil grew more slowly than those from cultures or tissues, and separate equations were developed for enumeration from these sources.
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, bacterial strains, growth indices, cell culture, culture media, animal pathogenic bacteria, microbial growth, laboratory techniques, enumeration strains, paratuberculosis, sheep diseases, radiometric BACTEC culture, diagnosis, diagnostic techniques.  

Reid, S.W.J.; Menzies, F.D.  Global context, generic tools: epidemiology for disease control on an international stage.  Preventive Veterinary Medicine.  2003; 60(1): 132.  ISSN:  0167-5877.  Note:  An issue of 8 papers by a variety of authors on a variety of topics.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors: infectious disease epidemiology, animal health, a variety of bacterial and viral diseases, risk analysis, disease control and prevention, the Dutch Johne’s disease control program.

Rodriguez Lazaro, D.; Lloyd, J.; Pla, M.; Ikonomopoulos, I.; Cook, N.  Nucleic acid sequence-based amplification (NASBA) detects DNA in Mycobacterium avium subsp. paratuberculosis.  FEMS Congress of European Microbiologists Abstract Book.  2003; (1): 289.  Note:  1st Federation of European Microbiological Societies (FEMS) Congress of European Microbiologists, Ljubljana, Slovenia; June 29-July 03, 2003.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, DNA analysis, sequence based amplification of nucleic acids, enzyme uses.

Rosa, G.J.M.; Tempelman, R.J.; Suchyta, S.; Madsen, S.A.; Burton, J.L.; Coussens, P.M.  Normalization, replication, and significance tests in cDNA microarray experiments.  Journal of Dairy Science.  2003; 86(Suppl. 1): 159.  ISSN:  0022-0302.  Note:  Joint Annual Meeting of the American Dairy Science Association, the American Society of Animal Science and the Mexican Association of Animal Production, Phoenix, Arizona, USA; June 22-26, 2003.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Descriptors: cattle disease, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, cDNA, molecular genetics.

Rossiter-Burhans, C.A.; Barlow, J.W.; Johnson, T.E.  Vermont Cattle Health Improvement Project.  Journal of Dairy Science.  2003; 86(Suppl. 1): 134.  ISSN:  0022-0302.  Note:  Joint Annual Meeting of the American Dairy Science Association, the American Society of Animal Science and the Mexican Association of Animal Production, Phoenix, Arizona, USA; June 22-26, 2003. 
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Descriptors:  Johne’s disease, disease control program, disease prevention, Vermont, United States.  

Saunders, V.F.; Eamens, G.J.; Turner, M.J.; Jessep, T.M.  Identification of a new RFLP type of Mycobacterium avium subsp. paratuberculosis in epidemiological tracing of bovine Johne's disease.  Australian Veterinary Journal.  2003; 81(9): 564-566.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  cattle, disease prevalence, disease transmission, epidemiology, genes, RFLP, Johne’s disease, Australia.

Seuna, E.; Seppanen, J.  National control strategies and ongoing research in Finland.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 251-253.  ISSN:  0044-605X.
NAL Call No.:  41.8 AC87
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, diagnosis, disease surveys, paratuberculosis, national Johne’s disease control program, Finland.

Sergeant, E.S.G.  Estimated flock-prevalence and distribution of ovine Johne's disease in Australia at December 2001.  Australian Veterinary Journal.  2003; 81(12): 768-769.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, disease prevalence, distribution, New South Wales, Australia.

Sergeant, E.S.G.; Marshall, D.J.; Eamens, G.J.; Kearns, C.; Whittington, R.J.  Evaluation of an absorbed ELISA and an agar-gel immuno-diffusion test for ovine paratuberculosis in sheep in Australia.  Preventive Veterinary Medicine.  2003; 61(4): 235-248.  ISSN:  0167-5877.  
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, body condition, Johne’s disease detection, known infected and non-infected flocks, diagnosis, diagnostic techniques, sensitivities and specificities, absorbed ELISA, agar gel immunodiffusion tests, histological lesion score, paratuberculosis, logistic-regression analysis on lesion and condition scores, New South Wales, Australia.

Sheridan, Joe M.; Bull, Tim J.; Hermon-Taylor, John.  Use of bioinformatics to predict a function for the GS element in Mycobacterium avium subspecies paratuberculosis.  Journal of Molecular Microbiology and Biotechnology.  2003; 5(1): 57-66.  ISSN:  1464-1801.  
URL:   http://www.jmmb.net/
NAL Call No.:  QR74.J68
Descriptors:  Mycobacterium avium subsp. paratuberculosis, homology of GS genes, ser2 region, Mycobacterium avium subsp. avium, bioinformatics, Johne’s disease, cell wall GPL, possible drug target, Crohn's disease, paratuberculosis.

Shin, S.J.; Chang, Y.F.; Yoo, H.S.  Immunological comparison of major proteins in Mycobacterium avium spp. paratuberculosis.  FEMS Congress of European Microbiologists Abstract Book.  2003; (1): 55-56.  Note:  1st Federation of European Microbiological Societies (FEMS) Congress of European Microbiologists, Ljubljana, Slovenia; June 29-July 03, 2003.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, proteins, immunology, comparative immune response.

Shulaw, W.P.; Larew-Naugle, A.  Paratuberculosis: a food safety concern?  In:  Torrence, M.E.; Isaacson, R.E.  Microbial Food Safety in Animal Agriculture: Current Topics.  Iowa State Press,  Ames, Iowa.  2003; 351-358.  ISBN:  0813814952.
NAL Call No.:  QR115.M4564  2003
Descriptors:  Mycobacterium avium subsp. paratuberculosis, etiology, zoonotic concerns, food borne disease, Crohn’s disease, food contamination, food safety.

Singh, D.K.  Prevention and control of infectious diseases of buffaloes.  Intas Polivet.  2003; 4(2): 292-298.  ISSN:  0972-1738.  
Descriptors:  buffalo, infectious diseases, animal pathogens, bacteria, viruses, parasites, disease prevention and control, anthrax, Brucella, foot and mouth disease; hemorrhagic septicemias, rabies, rhinotracheitis, rinderpest, trypanosoma, tuberculosis, paratuberculosis, bovine diarrhea virus, bovine ephemeral fever virus, buffalo poxvirus, Campylobacter fetus, Clostridium chauvoei, Mycobacterium avium subsp. paratuberculosis, Mycobacterium tuberculosis, Pasteurella multocida, rabies virus, rinderpest virus.

Singh, S.V.; Vihan, V.S.  Incidence of Mycobacterium avium sub sp. paratuberculosis in clinicaly suspected small ruminants.  Indian Journal of Small Ruminants.  2003; 9(1): 56-59.  ISSN:  0971-9857.
Descriptors:  goats, sheep, incidence of disease, Mycobacterium avium subsp. paratuberculosis, microscopic examination, 1038 clinically suspected animals, India.

Sivakumar, P., Tripathi, B.N., Nem Singh.  Comparison of different methods of DNA extraction from Mycobacterium avium subsp. paratuberculosis infected tissues of buffaloes.  Indian Journal of Comparative Microbiology, Immunology and Infectious Diseases.  2003; 24(1): 43-47.  ISSN:  0970-9320.  
Descriptors:  buffalo, infected with Mycobacterium avium subsp. paratuberculosis, different methods of DNA extraction of bacterial pellets, mucosal homogenate of infected intestines, extraction methods, freezing thawing and freezing boiling, centrifugation, diagnosis, diagnostic techniques, PCR DNA amplification.

Smith, W.L.; McGarvey, K.L.; Cullor, J.S.  The use of spiral plating and microscopic colony counting for the rapid quantitation of Mycobacterium paratuberculosis.  Letters in Applied Microbiology.  2003; 36(5): 293-296.  ISSN:  0266-8254.  
URL:  http://www.blackwell-synergy.com/links/doi/10.1046/j.1472-765X.2003.01311.x/abs/
NAL Call No.:  QR1.L47
Descriptors:  Mycobacterium avium subsp. paratuberculosis, quantitation by spiral plating and microscopic colony counting, broth and milk cultures, varying incubation periods, Middlebrook agar plates counted 8-14 days and 27-28 days.

Sorensen, O.; Rawluk, S.; Wu, J.; Manninen, K.; Ollis, G.  Mycobacterium paratuberculosis in dairy herds in Alberta.  Canadian Veterinary Journal.  2003; 44(3): 221-226.  ISSN:  0008-5286.  Note:  In English with a French summary.  
URL:    http://www.pubmedcentral.nih.gov/tocrender.fcgi?action=archive&journal=202
NAL Call No.:  41.8 R3224
Descriptors:  50 dairy herds, herd level prevalence, Mycobacterium avium subsp. paratuberculosis, pooled fecal culture, ELISA of serum, Alberta, Canada.

Sreedevi, B.; Krishnappa, G.  Detection of Mycobacterium tuberculosis complex organisms in clinical samples of cattle by PCR and DNA probe methods.  Indian Journal of Comparative Microbiology, Immunology and Infectious Diseases.  2003; 24(2): 167-171.  ISSN:  0970-9320.
Descriptors:  cattle, diagnosis, diagnostic techniques, DNA probes, polymerase chain reaction, tuberculin, tuberculosis, IS6110 element, Mycobacterium tubuculosis complex, differential subspecies separation, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, Mycobacterium bovis BCG strain, Mycobacterium phlei, Mycobacterium tuberculosis, Karnataka, India.  

Srivastava, Bejai Inder Sahai; Srivastava, Maya Devi.  A novel, more rapid method for the detection and discrimination of Mycobacterium avium subsp. avium and Mycobacterium avium subsp. paratuberculosis. FASEB Journal.  2003; 17(4-5): Abstract no. 408.5.  ISSN:  0892-6638.  Note:  FASEB Meeting on Experimental Biology: Translating the Genome, San Diego, CA, USA; April 11-15, 2003.
URL:  http://www.fasebj.org/
NAL Call No.:  QH301.F3
Descriptors:  detection and discrimination between Mycobacterium avium subsp. avium and Mycobacterium avium subsp. paratuberculosis, methods, CaCo2 cell line, SRIK-NKL cell line, bacterial growth differences.

Stabel, J.R.; Goff, J.P.; Kimura, K.  Effects of supplemental energy on metabolic and immune measurements in periparturient dairy cows with Johne's diseases.  Journal of Dairy Science. 2003; 86(11): 3527-3535.  ISSN: 0022-0302.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Abstract:  The present study was designed to evaluate whether feeding supplemental energy would improve the metabolic profile and alleviate some of the immunosuppression typically noted during the periparturient period in dairy cows with Johne's disease.  Twelve dairy cows naturally infected with Mycobacterium paratuberculosis were fitted with rumen cannulas in late gestation and assigned to treatment groups: control, n = 6; or stuffed, n = 6.  Cows in the control group were allowed to consume feed ad libitum.  Cows assigned to the stuffed treatment group were also fed ad libitum but received additional total mixed rations by manually stuffing their rumens with refused feed to maintain dry matter intake of 2% body weight per day before calving and 2.5% body weight per day after calving.  Serum nonesterified fatty acid levels were significantly decreased in stuffed cows compared with control cows, indicating that stuffing to maintain dry matter intake improved the energy balance in the cows.  In addition, periparturient serum calcium and magnesium concentrations were significantly higher in stuffed cows.  Stuffing modulated cell-mediated immunity by reducing lymphocyte proliferative responses to T-cell mitogens during early lactation.  Stuffing resulted in an increase in the secretion of in vitro immunoglobulin by peripheral blood mononuclear cells after parturition when compared to control cows.  These data demonstrate that energy balance is improved by providing additional energy in this manner and suggest energy supplementation can improve some aspects of immune function during the periparturient period.
Descriptors:  dairy cows, perinatal period, cow feeding, rumen cannulas, voluntary intake, overfeeding, energy balance, paratuberculosis, cattle bacterial diseases, Mycobacterium avium subsp. paratuberculosis, blood serum, calcium, magnesium, phosphorus, lymphocyte proliferation, blood lipids, free fatty acids, blood glucose, calcitriol, cell mediated immunity, humoral immunity.

Stabel, J.R.; Palmer, M.V.; Whitlock, R.H.  Immune responses after oral inoculation of weanling bison or beef calves with a bison or cattle isolate of Mycobacterium avium subsp. paratuberculosis.  Journal of Wildlife Diseases.  2003; 39(3): 545-555.  ISSN:  0090-3558.
URL:  http://www.jwildlifedis.org/
NAL Call No.:  41.9 W64B
Descriptors:  young animals, domestic and wild ruminants, cattle, bison calves, beef calves, host immune responses, pathologic changes, pathogenesis, physiopathology, experimental infection with Mycobacterium avium subsp. paratuberculosis that are both cattle or bison strains, oral dosing, cattle isolate, bison strain, blood sampling, fecal sampling, tissues samples at necropsy, disease resistance, demonstrated species differences to pathogen challenge, lesions, jejunum, distal ileum, IFN gamma, species response differences.

Sternberg, S.; Viske, D.  Control strategies for paratuberculosis in Sweden.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 247-249.  ISSN:  0044-605X.
NAL Call No.:  41.8 AC87
Descriptors:  cattle, control program for Johne’s, Mycobacterium avium subsp. paratuberculosis, diagnosis, diagnostic techniques, Sweden.

Storset, A.K.  Immunology of Mycobacterium avium subsp. paratuberculosis infection - immunodiagnostic methods.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 223-229.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87
Descriptors:  Johne’s disease, Mycobacterium avium subsp. paratuberculosis, immune response, immunity, interferon, immunodiagnosis, immunodiffusion tests, immunology, diagnostic techniques, ELISA, skin tests.

Stott, A.W.; Jones, G.J.; Humphry, R.W.; Gunn, G.J.  An economic evaluation of Johne's disease (paratuberculosis) in the dairy herd using dynamic programming.  Acta Veterinaria Scandinavica Supplementum.  2003; (supp. 98): 262.  ISSN:  0065-1699.  Note:  J.F. Agger and N. Toft edited the special issue.
NAL Call No.:  41.8 AC87 suppl
Descriptors:  dairy cattle, dairy herds, economic impact of Johne’s disease, Mycobacterium avium subsp. paratuberculosis, culling sick animals, milk prices, dynamic programming, Great Britain.  

Sung, N.; Collins, M.T.  Variation in resistance of Mycobacterium paratuberculosis to acid environments as a function of culture medium.  Applied and Environmental Microbiology.  2003; 69(11): 6833-6840.  ISSN:  0099-2240.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=83%20
NAL Call No.:  448.3 AP5
Descriptors:  Mycobacterium avium subsp. paratuberculosis, in vitro culture conditions, acid resistance, fatty acid medium, glycerol containing medium, both at pH 6.0, 6.8., reistant to acetate buffer at pH 3,4,5 6 at 20 degrees C, BACTE used to identify viable cells, measured soluable proteins, death, growth rate, morphology, comparison study, culture conditions are very important.

Tharaldsen, J.; Djonne, B.; Fredriksen, B.; Nyberg, O.; Sigurdardottir, O.  The national paratuberculosis program in Norway.  Acta Veterinaria Scandinavica.  2003; 44(3/4): 243-246.  ISSN:  0044-605X.  
NAL Call No.:  41.8 AC87
Descriptors:  cattle, goats, llamas, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, disease seroprevalence, disease surveys, epidemiology, immunodiagnosis, national control program, Norway.

Tiwari, A.; VanLeeuwen, J.A.; Dohoo, I.R.; Stryhn, H.; Keefe, G.P.  Effect of seropositivity for bovine leukaemia virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum on the calving to conception interval in maritime Canadian dairy cattle.  Proceedings of a Meeting - Society for Veterinary Epidemiology and Preventive Medicine. [Great Britain]2003; 243-252.  ISSN: 0956-7496.  Note:  Meeting held March 31-April 2, 2003, Warwick, England.
NAL Call No.:  SF780.9.S63
Descriptors:  dairy cattle, bovine leukemia virus, Mycobacterium avium subsp. paratuberculosis, Neospora caninum, seroprevalence, reproductive efficiency, Canada.

Toman, M.; Faldyna, M.; Pavlik, I.  Immunological characteristics of cattle with Mycobacterium avium subsp. paratuberculosis infection.  Veterinarni Medicina.  2003; 48(6): 147-154.  ISSN:  0375-8427.
URL:  http://vetmed.vri.cz/
NAL Call No.:  41.9 C333
Descriptors:  cattle infected with Johne’s disease, disease progression, clinical aspects, Mycobacterium avium subsp. paratuberculosis, antibodies, leukocytes, lymphocytes, monocytes, neutrophils, CD4+ lymphocytes, CD8+ lymphocytes, cell mediated immunity, interferon.

Tortoli, Enrico.  Impact of genotypic studies on mycobacterial taxonomy: The new mycobacteria of the 1990s.  Clinical Microbiology Reviews.  2003; 16(2): 319-354.  ISSN:  0893-8512.  
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=153142
NAL Call No.:  QR67.C54
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, Mycobacterium avium subsp. caprae, Mycobacterium avium subsp. hominissuis, Mycobacterium avium subsp. silvaticum, non-pigmented, pigmented, rapid growers, slow growers, taxonomy.

Uhart, Marcela M.; Vila, Alejandro R.; Beade, Mario S.; Balcarce, Alfredo; Karesh, William B.  Health evaluation of pampas deer (Ozotoceros bezoarticus celer) at Campos del Tuyu Wildlife Reserve, Argentina.  Journal of Wildlife Diseases.  2003; 39(4): 887-893.  ISSN:  0090-3558.
URL:  http://www.jwildlifedis.org/
NAL Call No.:  41.9 W64B
Descriptors:  pampas deer, free ranging, hematology, serum chemistries, minerals, metals, fecal parasites, seasonal evaluation of fecal ova and parasites, animal diseases, bluetongue, brucellosis, bovine respiratory syncytial virus infection, bovine viral diarrhea/mucosal disease, infectious bovine rhinotracheitis, Johne's disease (paratuberculosis), foot and mouth disease (FMD), leptospirosis (eight serovars), epizootic hemorrhagic disease, and parainfluenza-3 (PI-3), negative for paratuberculosis, Campos del Tuyu Wildlife Reserve, Buenos Aires, Argentina.

Underwood, S.C.; Decaminada, E.C.; Grimoldi, F.; Moras, E.V.; Carfagnini, J.C.  Estudio de la prevalencia de brucelosis, tuberculosis y paratuberculosis en cabras lecheras y carniceras pertenecientes a minifundistas de Santiago del Estero.  [Prevalence of brucellosis, tuberculosis and Johne's disease in smallholders' dairy and meat goats from Santiago del Estero].  Revista Argentina de Produccion Animal.  2003; 23(1): 53-61.  ISSN:  0326-0550.  Note:  In Spanish with an English summary.
Descriptors:  dairy and meat goats, 31 farms with10 animals/farm, prevalence of brucellosis, Brucella melitensis, BPA test, tuberculosis, Mycobacterium bovis, Johne’s disease, cervical comparative test for Mycobacterium avium subsp. paratuberculosis, percentages of disease incidence, Argentina.

Uzonna, J.E.; Chilton, P.; Whitlock, R.H.; Habecker, P.L.; Scott, P.; Sweeney, R.W.  Efficacy of commercial and field-strain Mycobacterium paratuberculosis vaccinations with recombinant IL-12 in a bovine experimental infection model.  Vaccine.  2003; 21(23): 3101-3109.  ISSN:  0264-410X.
NAL Call No.:  QR189.V32
Descriptors:  calves, vaccine testing model, Mycobacterium avium subsp. paratuberculosis, commercial Strain 18 and field isolate, vaccine response, strong local systemic and enteric IFN-gamma responses, field isolate showed reduced bacterial colony formation, field isolate vaccine recommended over Strain 18.

Van Schaik, G.; Rossiter, C.R.; Stehman, S.M.; Shin, S.J.; Schukken, Y.H.  Longitudinal study to investigate variation in results of repeated ELISA and culture of fecal samples for Mycobacterium avium subsp paratuberculosis in commercial dairy herds.  American Journal of Veterinary Research.  2003; 64(4): 479-484.  ISSN: 0002-9645.
URL:  http://avmajournals.avma.org/toc/ajvr/64/4
NAL Call No.:  41.8 AM3A
Descriptors:  Mycobacterium avium subsp. paratuberculosis, dairy herd, Johne’s disease, fecal samples, fecal cultures, ELISA, consistency of results, diagnostic method comparison, repeated tests of 112 cows on 6 commercial dairy farms, New York, United States.

Van Schaik, G.; Stehman, S.M.; Schukken, Y.H.; Rossiter, C.R.; Shin, S.J.  Pooled fecal culture sampling for Mycobacterium avium subsp. paratuberculosis at different herd sizes and prevalence.  Journal of Veterinary Diagnostic Investigation.  2003; 15(3): 233-241.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  dairy cows, dairy herds, whole herd testing, Johne’s disease, stochastic spreadsheet model, disease prevalence of Mycobacterium avium subsp. paratuberculosis, detection, diagnosis, disease distribution, epidemiology, pooled fecal sampling, fecal testing of individuals from farms with pooled positives, paratuberculosis, allocation of disease status as 1) not shedding, 2) low shedder, 3) moderate shedder, 4) heavy shedder, efficiency depends on ratio of positives to herd size of pooled samples, New York State, United States.  

Van Schaik, G.; Schukken, Y.H.; Crainiceanu, C.; Muskens, J.; Van Leeuwen, J.A.  Prevalence estimates for paratuberculosis adjusted for test variability using Bayesian analysis.  Preventive Veterinary Medicine.  2003; 60(4): 281-295.  ISSN:  0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  cattle herd testing, Mycobacterium avium subsp. paratuberculosis, ELISA testing, diagnostic techniques, disease prevalence, mathematical models, Bayesian theory, testing sensitivity and specificity, estimating true disease prevalence of Johne’s disease, epidemiology.

Veerabramhaiah, K.; Kumar, K.S.; Rao, S.T.V.; Naidu, P.T.  Clinico-pathological aspects of an unusual paratuberculosis in a crossbred cow.  Intas Polivet.  2003; 4(1): 32-33.  ISSN:  0972-1738. 
Descriptors:  crossbred cow, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, unusual case, clinical aspects, mortality, post mortem examination, animal pathology, case reports, Andhra Pradesh, India.

Wapenaar, W.; Van Schaik, G.; Leids, P.; Denney, L.; Schukken, Y.H.; Stehman, S.M.; Huntley, J.  NYSCHAP Johne's disease module, a program to change management of dairy farms to reduce Johne's disease prevalence.  Bovine Practitioner.  2003; 37(1): 23-29.  ISSN:  0524-1685.  Note:  In English with a French summary.
NAL Call No.:  SF779.5.A1B6
Descriptors:  dairy cows, dairy farms, New York State Cattle Health Assurance Program, Johne’s disease control, epidemiology, Johne’s Disease Module, success of training, adoption of management practices, milk production, disease prevalence, epidemiology, reviews, New York State, United States.

Wapenaar, W.; Leids, P.; Denney, L.; Van Schaik, G.; Stehman, S.; Schukken, Y.H.; Huntley, J.  A program to change management of dairy farms to reduce Johne's disease prevalence.  Acta Veterinaria Scandinavica, Supplementum.  2003; (Suppl. 98): 240.  ISSN:  0065-1699.  Note:  J.F. Agger and N. Toft edited the special issue.
NAL Call No.:  41.8 AC87 Suppl.
Descriptors:  dairy cattle, dairy farms, Mycobacterium avium subsp. paratuberculosis, disease control programs, disease prevalence, epidemiology farm management, biosecurity, New York, United States.

Waters, W.R.; Miller, J.M.; Palmer, M.V.; Stabel, J.R.; Jones, D.E.; Koistinen, K.A.; Steadham, E.M.; Hamilton, M.J.; Davis, W.C.; Bannantine, J.P.  Early induction of humoral and cellular immune responses during experimental Mycobacterium avium subsp. paratuberculosis infection of calves.  Infection and Immunity.  2003; 71(9): 5130-5138.  ISSN:  0019-9567.
URL:  http://www.jarvm.com/
NAL Call No.:  QR1.I57
Descriptors:  cattle, young animals, calves, experimental infections, Mycobacterium avium subsp. paratuberculosis, early immune response, antibodies CD4+ lymphocytes, interferon, nitric oxide, paratuberculosis, Johne’s disease.

Wells, S.J.; Godden, S.M.; Lindeman, C.J.; Collins, J.E.  Evaluation of bacteriologic culture of individual and pooled fecal samples for detection of Mycobacterium paratuberculosis in dairy cattle herds.  Journal of the American Veterinary Medical Association.  2003; 223(7): 1022-1025.  ISSN:  0003-1488.
URL:  http://avmajournals.avma.org/toc/javma/223/7
NAL Call No.:  41.8 AM3
Descriptors:  24 dairy cattle herds, detecting Mycobacterium avium subsp. paratuberculosis, individual and pooled fecal samples, in vitro culture methods, using pooled sampling and testing is cost effective, disease prevalence, Minnesota, United States.

Whittington, R.  The Future of OJD Control in Australia. 2003; 7 p.
Descriptors:  sheep, ovine Johne's disease (OJD), National OJD Control and Evaluation Programme (NOJDP), aims, delivery, policies to control spread, surveys, program structure, Australia.

Whittington, R.J.; Marsh, I.B.; Taylor, P.J.; Marshall, D.J.; Taragel, C.; Reddacliff, L.A.  Isolation of Mycobacterium avium subsp. paratuberculosis from environmental samples collected from farms before and after destocking sheep with paratuberculosis.  Australian Veterinary Journal.  2003; 81(9): 559-563.  ISSN:  0005-0423.  
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, goats, disease prevalence, Mycobacterium avium subsp. paratuberculosis, isolation from the environment, soil, feces, water, sediment, microbial contamination of the environment, effect of removing pathogen carrying animals, paratuberculosis, radiometric culture in environmental samples, reduction of pathogens after animal removal.

Whittington, R.J.; Eamens, G.J.; Cousins, D.V.  Specificity of absorbed ELISA and agar gel immunodiffusion tests for paratuberculosis in goats with observations about use of these tests in infected goats.  Australian Veterinary Journal.  2003; 81(1-2): 71-75.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  goats, Mycobacterium avium subsp. paratuberculosis, various isolates of bovine, or caprine origin, specificity of serological tests, laboratory experiments, 4 diagnostic test studied, AGID, ELISA< CSL PARACHEK, Johne’s absorbed ELISA, comparison study, antigen testing, diagnostic value, immunodiagnosis, immunodiffusion tests, paratuberculosis, quality controls.

Yousof-Beygi, G.; Ramin, A.G.; Faraji-Vand, A.R.  Study on the prevalence of subclinical cattle Johne's disease in the Urmia abattoir.  Archives of Razi Institute.  2003; (55): 63-69.  ISSN:  0365-3439.
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, prevalence of subclinical Johne’s, post slaughter tissue collection, 97 male and 196 female cattle, fecal sampling, epithelial tissue from between ileum and caecum, seasonal differences, no differences between different ages and sexes, Iran.

Zhu, Wenming; Plikaytis, Bonnie B.; Shinnick, Thomas M.  Resuscitation factors from mycobacteria: Homologs of Micrococcus luteus proteins.  Tuberculosis.  2003; 83(4): 261-269.  ISSN:  1472-9792.  
URL:  http://www.sciencedirect.com/science?_ob=IssueURL&_tockey=%23TOC%237161%232003%23999169995%23442814%23FLA%23&_auth=y&view=c&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=a50f3e526fd7006af102643d661aaa81
Descriptors:  cloning and characterizing resuscitation promoting factors, Mycobacterium avium subsp. paratuberculosis, Mycobacterium tuberculosis, recovery from late stationary culture.


Return to Contents

2002

Adaska, J.M.; Munoz-Zanzi, C.A.; Hietala, S.K.  Evaluation of result variability with a commercial Johne's disease enzyme-linked immunosorbent assay kit and repeat testing of samples.  Journal of Veterinary Diagnostic Investigation.  2002; 14(5): 423-426.  ISSN:  1040-6387.  
NAL Call No.:  SF774.J68
Descriptors:  cattle, dairy cows, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, serum sampling, 201 individual animals, antibody testing, diagnosis, diagnostic techniques, immunodiagnosis, ELISA kit, test kit variability, optical density variation, inconsistency of results complicates management decisions.

Amadori, M.; Lyashchenko, K.P.; Gennaro, M.L.; Pollock, J.M.; Zerbini, I.  Use of recombinant proteins in antibody tests for bovine tuberculosis.  Veterinary Microbiology.  2002; 85(4): 379-389.  ISSN:  0378-1135.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5190&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=7e99acb030d8f79b52d4e03a1c31a5f8NAL Call No.:  SF601.V44
Descriptors:  cattle, calves, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, ELISA, analytical diagnostic methods, diagnostic test reliability and sensitivity, antibody testing, antigens, immune response, interferon, paratuberculosis, recombinant proteins, tuberculosis, zoonoses.

Australia New South Wales Agriculture.  Ovine Johne's Disease Possible Trading and Control Options Available in the Residual Zone.  NSW Agriculture.  Australia.  2002; 4 p.
Descriptors:  sheep flocks, strategies, management, options to reduce impact of Johne’s, Mycobacterium avium subsp. paratuberculosis, disease control and prevention, immunization with vaccination, New South Wales, Australia.

Baba, A.I.; Catoi, C.; Denes, C.  Histopathological aspects of avian tuberculosis.  Buletinul Universitatii de Stiinte Agricole si Medicina Veterinara Cluj Napoca, Seria Medicina Veterinara.  2002; 58: 583-586.  ISSN:  1454-2382.  Note:  In English with a Rumanian summary.
Descriptors:  14,000 birds necropsied, hens, pigeons, turkeys, disease survey, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, many tissues sampled, amyloid in liver and spleen, Romania.

Bakker, D. Keynote: Johne's disease in the Netherlands. Research in Veterinary Science. April 2002; 72(Suppl. A): 28-29. ISSN: 0034-5288. Note: 56th Annual Conference of the Association of Veterinary Teachers and Research Workers on Current Topics in Veterinary Science, Scarborough, England, UK, March 25-27, 2002.
NAL Call No.: 41.8 R312
Descriptors: epidemiology, Mycobacterium avium subsp. paratuberculosis, cattle, The Netherlands, Johne’s disease.

Ball, R.L.; Burton, M.; Leger, J.S.; Dumonceaux, G.; Olsen, J.H.  Changes in calcium metabolism in nyala (Tragelaphus angassi) on a forage only diet.  Advances in Ethology.  2002; 37: 107.  ISSN:  0931-4202.  Note:  4th International Symposium on Physiology and Behaviour of Wild and Zoo Animals, Berlin, Germany; September 29-October 02, 2002.  
Descriptors:  captive zoo animal, nyala, Tragelaphus angassi, forage diet, calcium metabolism changes, excretion, phosphorus, potassium, sodium, Johne’s disease, Mycobacterium avium subsp. paratuberculosis.

Ballarini, G.; Martelli, P.  Paratubercolosi bovina: importanza della profilassi nel vitello.  [Bovine paratuberculosis: importance of prevention in calves.]  Obiettivi e Documenti Veterinari. 2002; 23(2): 5-8.  ISSN:  0392-1913.  Note:  In Italian.  
Descriptors:  calves, Mycobacterium avium subsp. paratuberculosis, importance of disease prevention, reviews.

Bannantine, J.P.; Baechler, E.; Zhang, Q.; Li, L.L.; Kapur, V.  Genome scale comparison of Mycobacterium avium subsp. paratuberculosis with Mycobacterium avium subsp. avium reveals potential diagnostic sequences.  Journal of Clinical Microbiology.  2002; 40(4): 1303-1310.  ISSN:  0095-1137.
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=140397
Descriptors:  Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. avium, genes, genetic comparisons, genome analysis, nucleotide sequences, codons, diagnosis, diagnostic techniques, analytical methods.

Bannantine, John P.; Stabel, Judith R. Killing of Mycobacterium avium subspecies paratuberculosis within macrophages. BMC Microbiology. January 30, 2002; 2(2 Cited May 17, 2002): 1-7. ISSN: 1471-2180.
Article URL: http://www.biomedcentral.com/content/pdf/1471-2180-2-2.pdf [cited July 16, 2002]
URL: http://www.biomedcentral.com/1471-2180
Descriptors: ruminant animal pathogen, cultured macrophages, interplay between bacterium and host, replication time, immunogold labeling of infected macrophages with antibodies, using transmission electron microscopy and viability counts.

Blackburn, C. de W.; McClure, P.J. [Editors]  Foodborne Pathogens: Hazards, Risk Analysis and Control.  Woodhead Publishing Ltd., Cambridge, UK.  2002; xvii + 521.  ISBN:  1855734540. Note:  20 chapters on a variety of topics regarding foodborne disease organisms.  
NAL Call No.:  RA601.5.F659  2002
Descriptors:  effective detection measures, control measures and application to individual pathogens, HACCP systems implementation, safe handling at every stage, Escherichia coli, Salmonella, Listeria monocytogenes, Campylobacter and Arcobacter, viruses, parasites, Mycobacterium avium subsp. paratuberculosis, many additional organisms addressed.

Borody, T. J.; Leis, S.; Warren, E. F.; Surace, R. Treatment of severe Crohn's disease using antimycobacterial triple therapy: Approaching a cure? Digestive and Liver Disease. January 2002; 34(1): 29-38. ISSN: 1590-8658.
Descriptors: causal role, Mycobacterium avium subsp. paratuberculosis, Crohn’s disease, triple macrolide-based anti-mycobacterial therapy, rifabutin (450 mg/d), clarithromycin (750 mg/d) and clofazimine (2 mg/kg/d), anti microbial treatment.

Burton, L.; Voges, H. Control of Johne's disease in dairy cattle. Proceedings of the New Zealand Society of Animal Production. 2002; 62: 299-302. ISSN: 0370-2731.
NAL Call No.: 49.9 N483
Descriptors: dairy cattle, Mycobacterium avium subsp. paratuberculosis, Crohn’s disease, contaminated milk products, infection level data, economic impacts, possible control measures, vaccines, management practices, breeding for genetic resistance, New Zealand.

Catton, B.A.  Paucibacillary paratuberculosis in a goat.  Canadian Veterinary Journal.  2002; 43(10): 787-788.  ISSN:  0008-5286.  Note:  In English with a French summary.
URL:  http://www.pubmedcentral.nih.gov/tocrender.fcgi?action=archive&journal=202
NAL Call No.:  41.8 R3224
Descriptors:  goats, Mycobacterium avium subsp. paratuberculosis, etiology, clinical aspects, pathogenesis, case report.

Cerri, D.; Cantile, C.; Ebani, V. V.; Montagnese, M.; Voltini, B.; Arispici, M. Diagnosis of paratuberculosis in naturally infected goats. Microbiologica. April 2002; 25(2): 131-137. ISSN: 1121-7138.
NAL Call No.: QR1 M57
Descriptors: goats, immunohistochemical method, agar gel immunodiffusion (AGID), diagnosis, Mycobacterium avium subsp. paratuberculosis, pathology, isolated from various organs, intestines, mesenteric lymph nodes, macrophages.

Chi, Junwook; Van Leeuwen, John A.; Weersink, Alfons; Keefe, Gregory P.  Direct production losses and treatment costs from bovine viral diarrhoea virus, bovine leukosis virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum.  Preventive Veterinary Medicine. 2002; 55(2): 137-153.  ISSN:  0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  cattle, production losses, production costs, animal diseases, milk losses, premature culling, reduced slaughter, mortality, abortion and reproductive losses, veterinary services, drug therapy, medication costs, extra farm labor, partial-budget model, 50 cow herd, viral diarrhea virus, bovine leucosis virus, Neospora canium, Mycobacterium avium subsp. paratuberculosis, milk yield effects, Maritime provinces, New Brunswick, Nova Scotia, Prince Edward Island, Canada.

Chi Junwook; Weersink, A.; Van Leeuwen, J.A.; Keefe, G.P.  The economics of controlling infectious diseases on dairy farms.  Canadian Journal of Agricultural Economics.  2002; 50(3): 237-256.  ISSN:  0008-3976.  Note:  In English with a French summary.
NAL Call No.:  281.8 C16
Descriptors:  livestock diseases, empirical model, optimal set of control strategies, 4 cattle diseases, bovine viral diarrhea (BVD), enzootic bovine leukosis (EBL), Johne's disease,  neosporosis, direct production losses and control expenditures for each disease, new animal screening, vaccination protection.

Chi, Junwook; Van Leeuwen, J.A.; Weersink, A.; Keefe, G.P.  Management factors related to seroprevalences to bovine viral-diarrhoea virus, bovine-leukosis virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum in dairy herds in the Canadian Maritimes.  Preventive Veterinary Medicine. 2002; 55(1): 57-68.  ISSN: 0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  dairy cattle, on farm productivity lowered by diseases, bovine diarrhea virus, bovine leukemia virus, Mycobacterium avium subsp. paratuberculosis, Neospora caninum, epidemiology, disease prevalence, risk assessment, animal husbandry, seroprevalence, disease control, vaccination, hygiene, Prince Edward Island, Nova Scotia, New Brunswick, Canada.

Cliver, D.O.  Infrequent microbial infections.  In: Cliver, D.O.; Riemann, H.P. [Editors]  Foodborne Diseases.  2nd edition. Academic Press. London, UK.  2002;  151-159.  ISBN:  0121765598. 
NAL Call No.:  QR201.F62 F67 2002
Descriptors:  food borne diseases described, zoonotic diseases, historic agents, occasionally transmitted agents, agents that can affect susceptible people, emerging foodborne pathogens, Escherichia coli O157:H7, Bacillus cereus, Mycobacterium avium subsp. paratuberculosis, Listeria monocytogenes, Giardia duodenalis, prions causing variant Creutzfeldt-Jakob disease.

Cocito, Carlo; Coene, Marc; De Kesel, Myriam; Gilot, Philippe. Polypeptides from Mycrobacterium paratuberculosis. Official Gazette of the United States Patent and Trademark Office Patents. [e-file] May 14, 2002; 1258(2): No Pagination. ISSN: 0098-1133.
NAL Call No.: T223.A21
Descriptors: Johne’s disease, bacterial pathogen, 101 amino acids of FIG 8, Mycobacterium bovis, Mycobacterium avium, Mycobacterium phlei, Mycobacterium tuberculosis, and possibly against Mycobacterium leprae, Mycobacterium intracellulare, Mycobacterium scrofulaceum, Mycobacterium fortuitum, Mycobacterium gordonae and Mycobacterium smegmatis, Johne’s positive cattle sera.

Collins, D.M.; de Zoete, M.; Cavaignac, S.M.  Mycobacterium avium subsp. paratuberculosis strains from cattle and sheep can be distinguished by a PCR test based on a novel DNA sequence difference.  Journal of Clinical Microbiology.  2002; 40(12): 4760-4762.  ISSN:  0095-1137.
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=154624
NAL Call No.:  QR46.J6
Descriptors:  Mycobacterium avium subsp. paratuberculosis, strain differences, identifying sheep types and cattle types, DNA sequences, PCR.

Collins, M.T.  Interpretation of a commercial bovine paratuberculosis enzyme-linked immunosorbent assay by using likelihood ratios.  Clinical and Diagnostic Laboratory Immunology.  2002; 9(6): 1367-1371.  ISSN:  1071-412X.
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=130105
Descriptors:  143 infected diary cattle, 2974 free of Johne’s disease, sera testing for Mycobacterium avium subsp. paratuberculosis, commercial ELISA, diagnosis, disease control.

Corti, Sabrina; Stephan, Roger. Detection of Mycobacterium avium subsp. paratuberculosis specific IS900 insertion sequences in bulk-tank milk samples obtained from different regions throughout Switzerland. BMC Microbiology. June 26, 2002; 2(15 Cited August 6, 2002): No Pagination. ISSN: 1471-2180.
URL: http://www.biomedcentral.com/1471-2180
Descriptors: possible relationship of Mycobacterium avium subsp. paratuberculosis to Crohn’s disease etiology, possible hazards of raw milk, bulk tank milk sampling, dairy stock subclinical infections, Switzerland.

Coussens, P.M.; Colvin, C.J.; Wiersma, K.; Abouzied, A.; Sipkovsky, S.  Gene expression profiling of peripheral blood mononuclear cells from cattle infected with Mycobacterium paratuberculosis.  Infection and Immunology.  2002; 70(10): 5494-5502.  ISSN: 0019-9567.
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=128350
NAL Call No.:  QR1.I57
Abstract:  A bovine-specific cDNA microarray system containing 721 unique leukocyte expressed sequence tags (ESTs) and amplicons representing known genes was used to compare gene expression profiles of peripheral blood mononuclear cells (PBMCs) from clinical and subclinical Johne's disease-positive Holstein cows (n = 2 per group).  Stimulation of PBMCs from clinically infected cows with Mycobacterium paratuberculosis tended to decrease expression of 83 genes (fold change, >1.5).  Of these 83 genes, 16 displayed significant down regulation across both clinical cows (P < 0.1), including genes encoding microspherule protein 1, fibroblast growth factor, and the Lyn B protein kinase.  Only eight genes from PBMCs of clinically infected cows exhibited a modest up regulation following stimulation with M. paratuberculosis, including those encoding bovine CD40L, gamma interferon, interleukin-10 (IL-10), and tissue inhibitor of matrix metalloproteinases (TIMP) 4.  In contrast, stimulation of PBMCs from subclinically infected cows with M. paratuberculosis tended to up regulate expression of 71 genes representing 68 unique transcripts.  Of these, 11 genes showed significant up regulation (fold change, >1.5; P < 0.1) across both animals, including those encoding bovine CD40L, several matrix metalloproteinases, and SPARC (secreted protein, acidic and rich in cystine).  Repression of gene expression was also observed in PBMCs from the subclinical cows, with 16 genes being significantly down regulated (fold change, >1.5; P < 0.1) across both animals, including those encoding the bovine orthologs of cytochrome oxidase subunit III, IL-1 receptor type I, and fibrinogen-like 2 protein.  Only one clone, representing an unknown bovine EST, was similarly down regulated in PBMCs from both the clinical and subclinical cows.  Thus, the most prominent change induced by exposure of PBMCs from clinical cows to M. paratuberculosis in vitro tended to be repression of gene expression, while changes in similarly treated PBMCs from subclinical cows was balanced between gene activation and repression. Comparison of gene expression profiles between PBMCs from clinical and uninfected (control) cows stimulated with the general mitogen concanavalin A were highly similar (overall r = 0.84), suggesting that M. paratuberculosis-induced gene repression in clinically infected cow PBMCs was not due to a general failure of the immune response in these animals.
Descriptors:  messenger RNA. leukocytes, leukocyte tags, gene expression profiles, peripheral blood mononuclear cells, clinical and subclinical Johne’s disease, Holstein cows, in vitro exposure, Mycobacterium paratuberculosis, immune responses.

Cvetnic, Z.; Brlek, K.; Trstenjak, J.; Ocepek, M.; Spicic, S.; Mitak, M.; Krt, B.  Gospodarska vaznost paratuberkuloze u uzgoju mlijecnih goveda.  [Economic importance of paratuberculosis in a breeding herd of dairy cows in Croatia.]  Veterinarska Stanica.  2002; 33(3): 133-139.  ISSN:  0350-7149.  Note:  In Croatian with an English summary.  
Descriptors:  dairy cattle, reasons for culling/slaughtering 1056 cows, 1995-2000, various conditions and diseases found, 19.7% clinical Johne’s, Mycobacterium avium subsp. paratuberculosis, Croatia.

Cvetnic, Z.  Paratuberkuloza ovaca i koza u Republici Hrvatskoj.  [Paratuberculosis in sheep and goats in the Republic of Croatia.]  Praxis Veterinaria Zagreb.  2002; 50(3): 255-260.  ISSN:  0350-4441.  Note:  In Croatian with an English summary.  
Descriptors:  sheep, goats, Mycobacterium avium subsp. paratuberculosis, disease prevalence, disease surveys, seroprevalence, 7058 sera samples, percentages of positives given, complement fixation tests, immunoenzyme techniques, ELISA, paratuberculosis, seroprevalence, Republic of Croatia.

Daniels, M.J.; Hutchings, M.R.; Allcroft, D.J.; Mckendrick I.J.; Greig A.  Risk factors for Johne's disease in Scotland--the results of a survey of farmers.  Veterinary Record.  2002; 150(5): 135-139.  ISSN: 0042-4900.
URL:  http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  farm surveys mailed to 127 farms, risk factors for Johne’s disease, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, wildlife and farm management practices, large numbers of livestock and rabbits, access of wildlife to feed stores clearest and most consistent risks, application of manure to grazing pasture, type of water supply for cattle, numbers of cows, cattle, cattle husbandry, disease prevalence, disease control, feeds, manures, drinking water, Corvus, East Scotland.

Davies, P.R. Is Crohn's disease caused by M. avium subsp. paratuberculosis? Proceedings of the New Zealand Society of Animal Production. 2002; 62: 290-293. ISSN: 0370-2731.
NAL Call No.: 49.9 N483
Descriptors: Johne’s disease, role of disease in Crohn’s disease, discussion of possible zoonotic aspects of Mycobacterium avium subsp. paratuberculosis.

de Lisle, G.W.  Johne's disease in New Zealand: the past, present and a glimpse into the future.  New Zealand Veterinary Journal.  2002; 50(3 Suppl.): 53-56.  ISSN:  0048-0169.
NAL Call No.:  41.8 N483
Descriptors:  ruminants, deer, sheep, cattle, Johne’s disease, disease control, Mycobacterium avium subsp. paratuberculosis, New Zealand.

D'Haese, Eva; Nelis, Hans J. Rapid detection of single cell bacteria as a novel approach in food microbiology. Journal of AOAC International. July-August 2002; 85(4): 979-983. ISSN: 1060-3271.
NAL Call No.: S583.A7
Descriptors: solid phase cytometry, food sampling, slow growing bacteria detection, of Mycobacterium avium subsp. paratuberculosis, model example of a slow-growing bacterium in milk.

Douart, A.; Maillard, R.  Eziologia ed epidemiologia della paratubercolosi bovina.  [Etiology and epidemiology of bovine paratuberculosis.]  Summa.  2002; 19(8): 37-42.  Note:  In Italian with an English summary.
Descriptors:  cattle, Johne’s disease, epidemiology, Mycobacterium avium subsp. paratuberculosis, etiology, fecal sampling, intestinal infection, disease transmission, environment.

Douart, A.; Maillard, R.  Le controle de la paratuberculose bovine.  [Monitoring of bovine paratuberculosis.]  Point Veterinaire.  2002; 33(222): 34-37.  ISSN:  0335-4997.  Note:  In French with an English summary.
Descriptors:  cattle, Johne’s disease, diagnosis, disease control, feces, paratuberculosis, Mycobacterium avium subsp. paratuberculosis.

Drennan, M.  Important factors in suckler beef production and influence of calving season on income.  Irish Grassland Association Journal.  2002; 36: 129-136.  ISSN:  0322-0588.
Descriptors:  beef cattle, beef production, suckler herds, beef cattle health, beef quality, calving, calving season, cost benefit analysis, economic analysis, profitability, profits, Ireland.    

Dumonceaux, G.A.; Burton, M.S.; Olsen, J.H.; Ball, R.L.  Johne's disease in zoological collections.  Proceedings of the North American Veterinary Conference.  2002; 16: 993-994.  Note:  In the volume: Small Animal and Exotics.  Part of a three volume set. Meeting held January 12-16, 2002, Orlando, FL.
NAL Call No.:  SF605.N672
Descriptors:  zoo animals, Johne’s disease, Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis.

Englund, Stina; Bolske, Goran; Johansson, Karl Erik. An IS900-like sequence found in a Mycobacterium sp. other than Mycobacterium avium subsp. paratuberculosis. FEMS Microbiology Letters. April, 9 2002; 209(2): 267-271. ISSN: 0378-1097.
URL: http://www.elsevier.com/locate/femslett
NAL Call No.: QR1.F44
Descriptors: IS 900, specificity, dairy cows, Mycobacterium cookii, recommendations of gene other than IS900 for detection.

Fang, Y.; Wu, W.H.; Pepper, J.L.; Larsen, J.L.; Marras, S.A.E.; Nelson, E.A.; Epperson, W.B.; Christopher-Hennings, J.  Comparison of real-time, quantitative PCR with molecular beacons to nested PCR and culture methods for detection of Mycobacterium avium subsp. paratuberculosis in bovine fecal samples.  Journal of Clinical Microbiology.  2002; 40(1): 287-291.  ISSN:  0095-1137.
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=120117
NAL Call No.:  QR46.J6
Descriptors:  bovine fecal sampling, detection methods for Mycobacterium avium subsp. paratuberculosis, automated PCR with fluorescent probes, sensitivity and specificity compared to fecal cultures, minimum quantity of 1.7x10-4 pg of DNA, correlating to 1 to 8 CFU, was detected.

Ferreira, R.; Fonseca, L.S.; Lilenbaum, W. Agar gel immunodiffusion test (AGID) evaluation for detection of bovine paratuberculosis in Rio de Janeiro, Brazil. Letters in Applied Microbiology. 2002; 35(3):173-175. ISSN: 0266-8254.
NAL Call No.: QR1.L47
Descriptors: epidemiology, immune response, bacterial infection, Mycobacterium paratuberculosis, diagnostic screening method, agarose gel immunodiffusion test, cattle sera, Brazilian herds, subclinical herd infections.

Ferreira, R.; Fonseca, L.; Lilenbaum, W.  Comparison between a commercial and an in-house ELISA for anti-Mycobacterium avium paratuberculosis antibodies detection in dairy herds in Rio de Janeiro, Brazil.  Revista Latinoamericana de Microbiologia.  2002; 44(3/4): 129-132.  ISSN:  0034-9771.  Note:  In English with a Spanish summary.
Descriptors:  dairy cows, Mycobacterium avium subsp. paratuberculosis, diagnosis, diagnostic techniques comparison study, 179 sera samples, PPA ELISA (protoplasmic paratuberculosis antigen and monoclonal anti-bive IgG conjugated to alkaline phosphatase), HerdChek Mpt (IDEXX), the PPA ELISA useful for collective herd test, Rio do Janeiro, Brazil.

Flebbe, U.  15 Jahre Paratuberkulosebekampfung. Erfahrungen der Niedersachsischen Tierseuchenkasse.  [15 years of paratuberculosis eradication programs in Lower Saxony. Experiences from the Niedersaechsische Tierseuchenkasse.]  Deutsche Tierarztliche Wochenschrift.  2002; 109(12): 520-523.  ISSN:  0341-6593.  Note:  In German with an English summary.
NAL Call No.:  41.8 D482
Descriptors:  Mycobacterium avium subsp. paratuberculosis, disease eradication and control programs, diagnostic techniques, program results, Lower Saxony, Germany.

Forbes, P.; Kingham, L.  Played for it, got it. Experiences of OJD extension.  Wool and Sheepmeat Services Program Annual Conference, Tocal Agricultural Centre, Paterson, NSW, Australia, December 3-5, 2002.  NSW Agriculture. Orange, Australia.  2002; 139-144.
Descriptors:  sheep, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, extension services to farmers, mycobacterial diseases, strategies for control and prevention, Australia. 

Fujita, Hiroshi; Eishi, Yoshinobu; Ishige, Ikuo; Saitoh, Kiyoshi; Takizawa, Touichirou; Arima, Terukatsu; Koike, Morio. Quantitative analysis of bacterial DNA from Mycobacteria spp., Bacteroides vulgatus, and Escherichia coli in tissue samples from patients with inflammatory bowel diseases. Journal of Gastroenterology. July 2002; 37(7): 509-516. ISSN: 0944-1174.
Descriptors: possible role of Mycobacterium, bowel diseases in humans.

Gerlach, G.F.  Paratuberkulose: Erreger und Uebertragungswege.  [Paratuberculosis: The pathogen and routes of infection.]  DTW (Deutsche Tieraerztliche Wochenschrift).  2002; 109(12): 504-506.  ISSN:  0341-6593.  Note:  In German with an English summary.  
NAL Call No.:  41.8 D482
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, disease control programs, disease prevalence, paratuberculosis, North Rhine Westphalia, Germany.

Glanemann, B.; Hoelzle, L.E.; Wittenbrink, M.M.  Bakteriologische Untersuchungen zur Paratuberkulose in Rinderbestaenden in der Schweiz.  [Bacteriological investigations about paratuberculosis in dairy herds in Switzerland.]  DTW (Deutsche Tieraerztliche Wochenschrift). 2002; 109(12): 528-529.  ISSN:  0341-6593.  Note:  In German.  
NAL Call No.:  41.8 D482
Descriptors:  cattle, antibodies, disease prevalence, paratuberculosis, Johne’s disease, fecal sampling, blood sera, ELISA assay, Mycobacterium avium subsp. paratuberculosis, Mycobacterium hassiacum, Mycobacterium thermoresistibile, genes, Switzerland.

Gomes, M.J.P.; Driemeier, D.; Ribeiro, V.R.; Wunder Junior, E.A.; Asanome, W.; Lanzon, L.F.; Wald, V.B. Doenca de Johne: isolamento do Mycobacterium avium subsp. paratuberculosis (MAP) em um rebanho leiteiro infectado na Regiao sul do Brasil.  [Johne's disease: isolation of Mycobacterium avium subsp. paratuberculosis (MAP) from an infected dairy herd in Southern Brazil.]  Acta Scientiae Veterinariae.  2002; 30(2): 113-118.  ISSN:  1678-0345.  Note:  In Portuguese with an English summary.
Descriptors:  8 Holstein cows, other animals, disease prevalence of Mycobacterium avium subsp. paratuberculosis, epidemiology, isolated and identified strains of MAP in bovine tissues, intestinal and lymph node, animals with and without clinical signs, culture in HEYM, estimate prevalence in infected herds using absorbed and non-absorbed ELISA, AGID assay, disease levels warrant a control program, Rio Grande do Sul, Brazil.

Grant, Irene R.; Hitchings, Edward I.; McCartney, Alan; Ferguson, Fiona; Rowe, Michael T. Effect of commercial-scale high-temperature, short-time pasteurization on the viability of Mycobacterium paratuberculosis in naturally infected cows' milk. Applied and Environmental Microbiology. February 2002; 68(2): 602-607. ISSN: 0099-2240.
NAL Call No.: 448.3 Ap5
URL: http://www.journals.asm.org
Descriptors: milk contamination control, APV HXP commercial scale pasteurizer, 4 different treatments, immunomagnetic separation PCR detection method, effects of homogenization, levels of contamination.

Grant, I.R.; Ball, H.J.; Rowe, M.T. Effectiveness of milk pasteurization in relation to Mycobacterium paratuberculosis. Research in Veterinary Science. April 2002; 72(Suppl. A): 29. ISSN: 0034-5288. Note: 56th Annual Conference of the Association of Veterinary Teachers and Research Workers on Current Topics in Veterinary Science, Scarborough, England, UK, March 25-27, 2002.
NAL Call No.: 41.8 R312
Descriptors: epidemiology, Mycobacterium avium subsp. paratuberculosis, contamination control, milk pasteurization treatments, Crohn’s disease, Johne’s disease.

Grant, Irene R.; Ball, Hywel J.; Rowe, Michael T. Incidence of Mycobacterium paratuberculosis in bulk raw and commercially pasteurized cows' milk from approved dairy processing establishments in the United Kingdom. Applied and Environmental Microbiology. May 2002; 68(5): 2428-2435. ISSN: 0099-2240.
URL: http://www.journals.asm.org
NAL Call No.: 448.3 Ap5
Descriptors: milk sampling, Mycobacterium avium subsp. paratuberculosis, immunomagnetic PCR, cell culture, low levels of Mycobacterium avium subsp. paratuberculosis, commercially pasteurized cows' milk, United Kingdom.

Greig, A.; Beard, P.; Daniels, M. J.; Henderson, D.; Hutchings, M.R.; Stevenson, K. The potential role of wildlife in the epidemiology of paratuberculosis in domestic animals. Research in Veterinary Science. April 2002; 72(Suppl. A): 30. ISSN: 0034-5288. Note: 56th Annual Conference of the Association of Veterinary Teachers and Research Workers on Current Topics in Veterinary Science, Scarborough, England, UK, March 25-27, 2002.
NAL Call No.: 41.8 R312
Descriptors: epidemiology, Mycobacterium avium subsp. paratuberculosis, wildlife as a disease reservoir, fox, rabbit, stoat, weasel, dairy cattle industry, Johne’s disease, transmission, United Kingdom.

Groenendaal, H.; Nielen, M.; Jalvingh, A.W.; Horst, S.H.; Galligan, D.T.; Hesselink, J.W.  A simulation of Johne's disease control.  Preventive Veterinary Medicine.  2002; 54(3): 225-245.  ISSN: 0167-5877.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5145&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=c5bc3d9e1bb66468352ae1f5475d522f
NAL Call No.:  SF601.P7
Descriptors:  dairy cows, Mycobacterium avium subsp. paratuberculosis, simulation models, disease control, bacterial diseases, epidemiology, economic analysis, infections, culling, calves, vaccination, milk yield, diagnosis, treatment, case reports, disease prevalence.

Guo, Hongyan; Naser, Saleh A; Ghobrial, George; Phanstiel, Otto IV. Synthesis and biological evaluation of new citrate-based siderophores as potential probes for the mechanism of iron uptake in mycobacteria. Journal of Medicinal Chemistry. May 9, 2002; 45(10): 2056-2063. ISSN: 0022-2623.
NAL Call No.: RS403.A1J6
URL: http://pubs.acs.org/jmc
Descriptors: bacterial pathogen, Mycobacterium avium subsp. paratuberculosis, iron uptake, mycobactin J, deferrioxamine B, acinetoferrin, nannochelin A, trans 2 octenoyl motif, trans cinnamoyl groups, iron binding ligands (C5), growth index values, at 2.4 muM a trans 2 octenoylated, citrate containing imide 6.

Gwozdz, J. M.; Thompson, K. G. Antigen-induced production of interferon-gamma in samples of peripheral lymph nodes from sheep experimentally inoculated with Mycobacterium avium subsp. paratuberculosis. Veterinary Microbiology. January 23, 2002; 84(3): 243-252. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: sheep, IFN-gamma, experimental oral inoculation, blood sampling, complement fixation test (CFT), agar gel diffusion test (AGID), enzyme-linked immunosorbent assay (ELISA), IFN-gamma test.

Halldorsdottir, Stefania; Englund, Stina; Nilsen, Sigrun Fredsvold; Olsaker, Ingrid. Detection of Mycobacterium avium subsp. paratuberculosis by buoyant density centrifugation, sequence capture PCR and dot blot hybridisation. Veterinary Microbiology. July 22, 2002; 87(4): 327-340. ISSN: 0378-1135.
URL: http://www.elsevier.com/locate/vetmic
NAL Call No.: SF601.V44
Descriptors: detection methods, bovine fecal samples, Percoll and IS900, alternative to bacterial culture.

Hammer, P.; Kiesner, C.; Walte, H.G.; Knappstein, K.; Teufel, P.  Heat resistance of Mycobacterium avium ssp. paratuberculosis in raw milk tested in a pilot plant pasteurizer.  Kieler Milchwirtschaftliche Forschungsberichte.  2002; 54(4): 275-297.  ISSN:  0023-1347.  Note:  In English with summaries in German and French.  
NAL Call No.:  44.9 K542
Descriptors:  raw milk, Mycobacterium avium subsp. paratuberculosis, pasteurization, time and temperature combination experiments, pathogen survival, heat treatment, heat resistance, macrophages, phagocytosis.

Hancox, M. Bovine tuberculosis: Milk and meat safety. Lancet North American Edition. February 23, 2002; 359(9307): 706-707. ISSN: 0099-5355.
NAL Call No.: 448.8 L22
Descriptors: bovine based food product safety, human health risks, Mycobacterium avium subsp. paratuberculosis, Campylobacter spp, bacterial disease contamination.

Harris, N. B.; Zinniel, D. K.; Hsieh, M. K.; Cirillo, J. D.; Barletta, R. G. Cell sorting of formalin-treated pathogenic Mycobacterium paratuberculosis expressing GFP. Biotechniques. March 2002; 32(3): 522-527. ISSN: 0736-6205.
NAL Call No.: RB37.A1B56
Descriptors: Mycobacterium avium subsp. paratuberculosis, occupational safety, laboratory employees, pathogenic organisms, GFP fluorophore, safe handling without biosafety level II and III equipment.

Hasvold, H.J.; Valheim, M.; Berntsen, G.; Storset, A.K.  In vitro responses to purified protein derivate of caprine T lymphocytes following vaccination with live strains of Mycobacterium avium subsp. paratuberculosis.  Veterinary Immunology and Immunopathology.  2002; 90(1-2): 79-89.  ISSN:  0165-2427.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776
NAL Call No.:  SF757.2.V38
Descriptors:  goats, goat kids, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, live vaccines, vaccine development, T lymphocytes, immune response, immunity, immunology, interferon, interleukin-2. 

Hermon, Taylor John; Bull, Tim. Crohn's disease caused by Mycobacterium avium subspecies paratuberculosis: A public health tragedy whose resolution is long overdue. Journal of Medical Microbiology. January, 2002; 51 (1): 3-6. ISSN: 0022-2615
NAL Call No.: QR1.J62
Descriptors: animal and human pathogen, zoonotic aspects, human health risks, contaminated animal products.

Hermon, Taylor J.; Bull, T.; Boumedine, K.; McMinn, E.; Skull, A. Keynote: Mycobacterium avium subsp. paratuberculosis in animals, food and water supplies, and its impact on human health. Research in Veterinary Science. April 2002; 72(Suppl. A): 28. ISSN: 0034-5288. Note: 56th Annual Conference of the Association of Veterinary Teachers and Research Workers on Current Topics in Veterinary Science, Scarborough, England, UK, March 25-27, 2002.
NAL Call No.: 41.8 R312
Descriptors: epidemiology, Mycobacterium avium subsp. paratuberculosis, cattle, humans, rabbits, sheep, human health risks, Johne’s disease.

Hermon, Taylor J. Treatment with drugs active against Mycobacterium avium subsp. paratuberculosis can heal Crohn's disease: More evidence for a neglected public health tragedy. Digestive and Liver Disease. January 2002; 34(1): 9-12. ISSN: 1590-8658.
Descriptors: clinical immunology, bacterial infection, Mycobacterium avium subsp. paratuberculosis, pathogens, clarithromycin, clofazimine, rifabutin, Crohn's disease, therapy.

Herva, T.  Turvallinen kumppani - hanke selvittaa elaintautien esiintymista.  [Safe company - plan for solving the disease situation.]  Suomen Elainlaakarilehti.  2002; 108(9): 507-510.  ISSN:  0039-5501.  Note:  In Finnish.
NAL Call No.:  41.8 F49
Descriptors:  cattle, disease prevention and control, diseases of concern, bovine diarrhea virus, Mycobacterium avium subsp. paratuberculosis, Trichophyton verrucosum, Finland.

Hirst, Heather L.; Garry, Franklyn B.; Salman, M.D. Assessment of test results when using a commercial enzyme-linked immunosorbent assay for diagnosis of paratuberculosis in repeated samples collected from adult dairy cattle. Journal of the American Veterinary Medical Association. June 1, 2002; 220(11): 1685-1689. ISSN: 0003-1488.
URL: http://www.avma.org
NAL Call No.: 41.8 Am3
Descriptors: dairy cows, cattle, ELISA, antibody detection, Mycobacterium avium subsp. paratuberculosis, serum samples, 2 sampling times, control measures.

Homuth, M. Diagnostik der Paratuberkulose.  [Diagnostics for paratuberculosis.]  DTW (Deutsche Tieraerztliche Wochenschrift).  2002; 109(12): 516-519.  ISSN:  0341-6593.
NAL Call No.:  41.8 D482
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, diagnostic techniques, control programs, paratuberculosis, various diagnostic approaches, advantages and disadvantages of methods, review article.

Hostetter, Jesse M.; Steadham, Edward M.; Haynes, Joseph S.; Bailey, Theodore B.; Cheville, Norman F.  Cytokine effects on maturation of the phagosomes containing Mycobacteria avium subspecies paratuberculosis in J774 cells.  FEMS Immunology and Medical Microbiology.  2002; 34(2): 127-134.  ISSN:  0928-8244.  
Descriptors:  Mycobacterium avium subsp. paratuberculosis, J774 cell lines, cytokines, interferon, lipopolysaccharides, lysosomes, macrophage activation, paratuberculosis.

Hutchings, M.R.; Daniels, M.J.; Henderson, D.; Greig, A. Wildlife to ruminant transmission routes for M. a. paratuberculosis. Research in Veterinary Science. April 2002; 72(Suppl. A): 30. ISSN: 0034-5288. Note: 56th Annual Conference of the Association of Veterinary Teachers and Research Workers on Current Topics in Veterinary Science, Scarborough, England, UK, March 25-27, 2002.
NAL Call No.: 41.8 R312
Descriptors: epidemiology, Mycobacterium avium subsp. paratuberculosis, wildlife as a disease reservoir, cattle, rabbit, rodents, dairy cattle industry, Johne’s disease, transmission, United Kingdom.

Jones, P.H.; Farver, T.B.; Beaman, B.L.; Cetinkaya, B.; Morgan, K. L. Chronic gastrointestinal diseases in dairy farmers in England and the Welsh borders: Is there an association between Crohn's disease and bovine paratuberculosis? Research in Veterinary Science. April 2002; 72(Suppl. A): 30-31. ISSN: 0034-5288. Note: 56th Annual Conference of the Association of Veterinary Teachers and Research Workers on Current Topics in Veterinary Science, Scarborough, England, UK, March 25-27, 2002.
NAL Call No.: 41.8 R312
Descriptors: epidemiology, potential for zoonotic disease, Mycobacterium avium subsp. paratuberculosis, possible work related illness, dairy cattle industry, dairy farmers, Johne’s disease, United Kingdom.

Jungersen, G.; Huda, A.; Hansen, J.J.; Lind, P.  Interpretation of the gamma interferon test for diagnosis of subclinical paratuberculosis in cattle.  Clinical and Diagnostic Laboratory Immunology.  2002; 9(2): 453-460.  ISSN:  1071-412X.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?action=archive&journal=84
Descriptors:  Kongeaa project, 252 cattle with no signs of Johne’s in 10 infected herds, 117 cattle in 5 herds no Johne’s, whole blood stimulated with bovine, avian and johnin purified protein derivative, checked for IFN gamma release, specificity data, false positives noted, cross reactions, Denmark.

Kalis, C.H.J.; Barkema, H.W.; Hesselink, J.W.; van Maanen, C.; Collins, M.T.  Evaluation of two absorbed enzyme-linked immunosorbent assays and a complement fixation test as replacements for fecal culture in the detection of cows shedding Mycobacterium avium subspecies paratuberculosis.  Journal of Veterinary Diagnostic Investigation.  2002; 14(3): 219-224.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  dairy cattle, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, prevention of disease from cows to calves, disease control with management strategies, 2 different ELISAs and a complement fixation test compared, carrier state, diagnosis, diagnostic techniques, diagnostic value, level of pathogen shedding.

Kavanagh, N.  Milk borne zoonotic infections.  Cattle Practice.  2002; 10(1): 15-18.  ISSN:  0969-1251.
NAL Call No.:  SF961.C37
Descriptors:  food borne illness, raw milk, other milk products, salmonellosis, Salmonella typhimurium DT104, E. coli 0157, Campylobacter, Mycobacterium avium subsp. paratuberculosis, Crohn’s disease, bovine tuberculosis, United Kingdom, Republic of Ireland.

Kim Doo; Jeon KwanJoon; Kim JongTaek; Shin KwangSoon; Shin MyungKyun; Chang GukHyun; Kim JeungKi; Kim OchSung; Jung JaeYoung.  Prevalence of paratuberculosis of dairy cattle in Kangwon area.  Korean Journal of Veterinary Research.  2002; 42(1): 81-88.  ISSN:  1225-0198.  Note:  In Korean with an English summary.
Descriptors:  2261 dairy cows, 162 herds, serotesting, ELISA, immunoblotting with recombinant 43 KDa protein of Mycobacterium avium subsp. paratuberculosis, fecal culture, HEYM with mycobactin J, PCR, sensitivity and specificity for each method, Korean Republic.

Kim, S.G.; Shin, S.J.; Jacobson, R.H.; Miller, L.J.; Harpending, P.R.; Stehman, S.M.; Rossiter, C.A.; Lein, D.A.  Development and application of quantitative polymerase chain reaction assay based on the ABI 7700 system (TaqMan) for detection and quantification of Mycobacterium avium subsp. paratuberculosis.  Journal of Veterinary Diagnostic Investigation.  2002; 14(2): 126-131.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  development and application of diagnostic techniques, Johne’s disease, nucleotide sequences, PCR, IS900 TaqMan, useful in determining viable cell numbers over the incubation period, Mycobacterium strain differences, Mycobacterium avium subsp. paratuberculosis ATCC 19698, Mycobacterium fortuitum, Mycobacterium intracellulare, Mycobacterium kansasii, Mycobacterium marinum, Mycobacterium phlei, Mycobacterium smegmatis, Mycobacterium terrae, Mycobacterium ulcerans, Mycobacterium asiaticum, Mycobacterium simiae, Mycobacterium abscessus, Mycobacterium avium subsp. avium, Mycobacterium bovis, Mycobacterium fortuitum subsp. fortuitum, Mycobacterium scrofulaceum, Mycobacterium ulcerans, 9 non-mycobacterial species, Borrelia burgdorferi, Chlamydia psittaci, Ehrlichia canis, Ehrlichia equi, Ehrlichis risticii, Escherichia coli, Escherichia coli O157:H7, Streptococcus equi, Streptococcus zooepidemicus.

Klawonn, W.; Cussler, K.; Draeger, K. G.; Gyra, H.; Koehler, H.; Zimmer, K.; Hess, R.G.  Zur Bedeutung von allergischem Hauttest mit Johnin, Antikoerper-ELISA, kultureller Kotuntersuchung sowie der Impfung fuer die Sanierung dreier chronisch Paratuberkulose-infizierter Milchviehherden in Rheinland-Pfalz.  [Evaluation of intradermal test with Johnin, antibody ELISA, microbial culture and vaccination for sanitation of three chronically paratuberculosis infected dairy herds in Rhineland-Palatinate.]  DTW (Deutsche Tieraerztliche Wochenschrift).  2002; 109(12): 510-516.  ISSN:  0341-6593.  Note:  In German with an English summary.  
NAL Call No.:  41.8 D482
Descriptors:  cattle, calves, culling sick animals, Mycobacterium avium subsp. paratuberculosis, antibodies, diagnostic techniques, disease control, granuloma, immunization, paratuberculosis, sanitation, skin tests, vaccination, Rhineland Palatinate, Germany.

Koets, Ad; Rutten, Victor; Hoek, Aad; van Mil, Frans; Muller, Kerstin; Bakker, Douwe; Gruys, Erik; van Eden,Willem. Progressive bovine paratuberculosis is associated with local loss of CD4+ T cells, increased frequency of gammadelta T cells, and related changes in T cell function. Infection and Immunity. July 2002; 70(7): 3856-3864. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: Mycobacterium avium subsp. paratuberculosis, loss of cell mediated response, immune reactivity of intestine, cows, etiology.

Krayc, B.; Schonthaler, D. [Editors]  Tagungsbericht 1. Fachtagung fur Ziegenzuchter und -halter zum Thema Ziegenzucht und Ziegenhaltung, 12. November und 13. November 2002, BAL Gumpenstein, Irdning, Austria.  [Conference report. 1. Specialist Conference for Goat Breeders and Keepers on the Theme of Goat Breeding and Management.  12-13 November, 2002 at BAL Gumpenstein, Austria.]  Published by Bundesanstalt fur Alpenlandische Landwirtschaft Gumpenstein.  Irdning, Austria.  2002; 50.  Note:  In German.
Descriptors:  12 papers, goats, breeding, nutritional value of goat products, improving goats milk, milk protein variations, grazing in alpine regions, feeding and feeds, inbreeding, tuberculosis and Johne’s disease, other diseases, mastitis, Austria.

Langelaar, M.; Koets, A.; Muller, K.; van Eden, W.; Noordhuizen, J.; Howard, C.; Hope, J.; Rutten, V. Mycobacterium paratuberculosis heat shock protein 70 as a tool in control of paratuberculosis. Veterinary Immunology and Immunopathology. September 10, 2002; 87(3-4): 239-244. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
URL: http://www.elsevier.com/locate/vetimm
Descriptors: Mycobacterium avium subsp. paratuberculosis, cattle, antibody titers, rHsp 70, shuttle antigen, interaction between APC and Fitc-labelled rHsp70, FACS analysis, uptake.

Leid, J.G.; Hunter, D.; Speer, C.A.  Early diagnosis of Johne's disease in the American bison by monoclonal antibodies directed against antigen 85.  In:  Gibbs, E. P. J.; Bokma, B.H. [Editors].  The Domestic Animal/Wildlife Interface: Issues for Disease Control, Conservation, Sustainable Food Production, and Emerging Diseases Conference and Workshop Organised by the Society for Tropical Veterinary Medicine and the Wildlife Diseases Association Wildlife and Livestock, Disease and Sustainability: What Makes Sense?  Pilanesberg National Park, South Africa, 22-27 July, 2001.  New York Academy of Sciences, New York.  2002; 66-72.  ISBN:  1573314382
NAL Call No.:  500 N484 v. 969
Descriptors:  American bison, experimental infection with Mycobacterium avium subsp. paratuberculosis, diagnostic monoclonal antibodies, mice hybridomas, Mycobacterium bovis antigen 85, sera from 100 inoculated bison, indicate monoclonal antibodies can be reliable diagnostic test.

Leine, N.  Friskare geiter" - eit smittesaneringsprosjekt: med malsetting a sanere sjukdommane CAE, byllesjuke og paratuberkulose i norske geitebuskapar.   ['Healthy goats' - a project for the eradication of infectious diseases.]  Norsk Veterinaertidsskrift.  2002; 114(3): 313-315.  ISSN:  0332-5741.  Note:  In Norwegian.  
Descriptors:  goat herds, 20 farms tested, disease elimination, caprine arthritis encephalitis, Johne's disease, Mycobacterium avium subsp. paratuberculosis, and caseous lymphadenitis Corynebacterium pseudotuberculosis, information dissemination, establishing a base line of infections, serological survey, Norway.

Lewis, C.  Developing a healthy flock.  In Practice.  2002; 24(1): 12-16.  ISSN:  0263-841X.
NAL Call No.:  SF601.I4
Descriptors:  sheep, husbandry, management, replacement rates, abortion, many diseases mentioned, toxicities, pyrethroid insecticides, organophosphate insecticides, vaccination, transport of animals, nematodes, avermectins, scrapie, various bacterial diseases including Mycobacterium avium subsp. paratuberculosis, viral diseases, external and internal parasites, disease prevention.

Links, I.J.; Evers, M.; Denholm, L.J.  Progress with Ovine Johne's Disease Control in New South Wales - update November 2002.  Wool and Sheepmeat Services Program Annual Conference, Tocal Agricultural Centre Paterson, NSW, Australia, 3-5 December 2002.  NSW Agriculture.  Orange, Australia.  2002; 85-87.  
Descriptors:  sheep, lambs, Johne’s disease, mycobacterial diseases, Mycobacterium avium subsp. paratuberculosis, disease prevalence, epidemiology, diagnosis, disease control, immunity, immunization, vaccination, vaccine development, New South Wales, Australia.

Lund, Barbara M.; Gould, Grahame W.; Rampling, Anita M. Pasteurization of milk and the heat resistance of Mycobacterium avium subsp. paratuberculosis: A critical review of the data. International Journal of Food Microbiology. July 25, 2002; 77(1-2): 135-145. ISSN: 0168-1605.
URL: http://www.elsevier.com/locate/ijfood,icro
NAL Call No.: QR115.I57
Descriptors: Mycobacterium avium subsp. paratuberculosis, heat resistance, Johne’s disease, Crohn’s disease, heat treatment parameters, performance criterian, human health risks, post-pasteurization contamination control.

Luyven, G.; Vom Schloss, A.; Sasserath, M.  Paratuberkulosesanierung in Nordrhein-Westfalen.  [Paratuberculosis eradication programs in North Rhine, Westfalia.]  DTW (Deutsche Tierarztliche Wochenschrift).  2002; 109(12): 524-527.  ISSN:  0341-6593.  Note:  In German with an English summary.  
NAL Call No.:  41.8 D482
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s control programs, testing, herd management, North Rhine, Westphalia, Germany.

Mackintosh, C. G. Johne's disease in deer: Prospects for control. Proceedings of the New Zealand Society of Animal Production. 2002; 62: 303-306. ISSN: 0370-2731.
NAL Call No.: 49.9 N483
Descriptors: farmed deer, disease prevention and control, Mycobacterium avium subsp. paratuberculosis, clinical picture, detection of subclinical infections, culling, depopulation, restocking, New Zealand.

Magnano, G.; Schneider, M.; Carranza, A.; Bergamo, E.; Henriquez, M.B.; Giraudo, J.A.  Evaluacion serologica de paratuberculosis en el sudoeste de la provincia de Cordoba, Argentina.  [Serologic evaluation of paratuberculosis in the southernwest area of Cordoba province, Argentina.]  Veterinaria Argentina.  2002; 19(190): 741-746.  ISSN:  0326-4629.  Note:  In Spanish with an English summary.  
NAL Call No.:  SF604.V463
Descriptors:  beef cattle herds, 19 farms, serological survey, ELISA, low percentages for Mycobacterium avium subsp. paratuberculosis, Cordoba province, Argentina.

Mahavir Singh; Siddiqui, M.Z.; Singh, R.P.  Intra-species mice hybridomas against a recombinant protein of Mycobacterium avium paratuberculosis.  Journal of Applied Animal Research.  2002; 22(1): 137-144.  ISSN:  0971-2119.  Note:  In English with a Hindi summary.
NAL Call No.:  SF55.I4J68
Descriptors:  mice, intra-species mice hybridomas, 35kDa antibodies of Mycobacterium avium subsp. paratuberculosis primed splenocytes of Swiss white mice with BALB/c derived myeloma cells, DNA cloning, hybridomas, IgG, immune response, monoclonal antibodies, recombinant proteins, macrophages, immunoblots.  

Mahmoud, O. M.; Haroun, E. M.; Elfaki, M. G.; Abbas, B. Pigmented paratuberculosis granulomata in the liver of sheep. Small Ruminant Research. March 2002; 43(3): 211-217. ISSN: 0921-4488.
URL: http://www.elsevier.com/locate/smallrumres
NAL Call No.: SF380.I52
Descriptors: Johne’s disease, sheep, description of granulomata, epitheloid cells, basophilic granules, fibrous capsule, intestinal lesions, ileum, rectum, mesenteric lymph nodes, acid fast bacteria, Mycobacterium avium subsp. paratuberculosis, yellowish orange pigment.

Mainali, C.  Alberta's Johne's disease control program.  Advanced Dairy Technology.  2002.  14: 77-82.  ISSN: 1184-0684. Note:  Paper presented at the Western Canadian Dairy Seminar, March 5-8, 2002, Red Deer, Alberta.
URL:   http://www.afns.ualberta.ca/wcds/%20Access%20method:%20http
NAL Call No.:  SF223.W478
Descriptors:  dairy cows, Mycobacterium avium subsp. paratuberculosis, Johnes’ disease control program, Alberta, Canada.  

Manjurano, A.; Karimuribo, E.D.; Mdegela, R.H.; Kusiluka, L.I.M.; Kipanyula, M.I.; Kambarage, D.M.  Prevalence of Mycobacterium avium subspecies paratuberculosis infection in cattle in the southern highlands of Tanzania.  In:  Kazwala, R.R.; Mbaga, S.H.; Kusiluka, L.J.M.; Laswai, G.  [Editors].  Proceedings of the Joint 17th Scientific Conference of the Tanzania Society for Animal Production and the 20th Scientific Conference of the Tanzania Veterinary Association held at AICC Arusha, Tanzania, 3-5 December 2002.  Published by Tanzania Society of Animal Production, Morogoro, Tanzania.  2002; 351-359.  
Descriptors:  dairy cattle, dairy herds, Johne’s disease, disease prevalence, Mycobacterium avium subsp. paratuberculosis, disease prevalence, fecal sampling, age differences, disease surveys, epidemiology, paratuberculosis, Tanzania.

Marco, Ignasi; Ruiz, Maria; Juste, Ramon; Garrido, Juan Manuel; Lavin, Santiago.  Paratuberculosis in free-ranging fallow deer in Spain.  Journal of Wildlife Diseases.  2002; 38(3): 629-632.  ISSN:  0090-3558.
URL:  http://www.jwildlifedis.org/. 
NAL Call No.:  41.9 W64B
Descriptors:  fallow deer, Dama dama, gross lesions, post mortem examination and histopathology, PCR, indirect ELISA, immunodiffusion tests, sera testing, Mycobacterium avium subsp. paratuberculosis, Regional Hunting Reserve of El Sueve, Asturias, Spain.

McClure, P.J.  Microbiological hazard identification in the meat industry.  Kerry, J.; Kerry, J.; Ledward, D. [Editors]  Meat Processing: Improving Quality.  Woodhead Publishing Ltd.  Cambridge, UK.  2002; 217-236.  ISBN:  1855735830.
Descriptors:  microbial hazards of meat and meat products, foodborne illnesses, zoonotic diseases, analytical detecting methods, Salmonella, Escherichia coli, Campylobacter jejuni, Yersinia enterocolitica, Staphylococcus aureus, Listeria monocytogenes, Clostridium perfringens, Clostridium botulinum, Mycobacterium avium subsp. paratuberculosis, other bacteria, parasites, prions, viruses.

Mehta, B.M.; Mehta, F.M.; Borkhatriya, V.N.  Mycobacterium avium ssp. paratuberculosis: an overview.  Indian Dairyman.  2002; 54(11): 63-68.  ISSN:  0019-4603.
NAL Call No.:  44.8 IN282
Descriptors:  cattle, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, diagnosis, disease transmission, public health, zoonoses, India.

Menzies, F.D.; Reid, S.W.J. [Editors]  Society for Veterinary Epidemiology and Preventive Medicine. Twentieth Anniversary Proceedings of a Meeting Held at University of Cambridge, UK, 3rd-5th April, 2002.  Published by the Society.  Roslin, UK.  2002; 220 p.  ISBN:  0948073543.
Descriptors:  sheep, horses, pigs, cattle, epidemiology, preventative medicine, risk factors, mathematical models for analysis, impact of housing systems, methods for assessing sensitivity and specificity of diagnostic techniques, equine influenza, foot and mouth disease, Johne's disease, salmonellosis, encephalomyocarditis, toxoplasmosis, helminthoses, colic, lameness, fetal death, isoflurane and halothane toxicity.

Mori, Yasuyuki; Kikuma, Reiko; Muneta, Yoshihiro; Yoshihara, Kazuhiro; Hikono, Hirokazu; Momotani, Eiichi.  Studies on the diagnostic methods for bovine paratuberculosis.  Bulletin of the National Institute of Animal Health.  2002; (109): 33-42.  ISSN:  1347-2542.  Note: In Japanese.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, diagnostic methods, cytokines, diagnosis, interferon, monoclonal antibodies, monocytes, paratuberculosis, pathogenesis, tuberculin, fecal testing, PCR test with internal control DNA is accurate, sensitive and rapid, interferon gamma (IFN-gamma) assay using johnin purified protein derivative (J-PPD), bovine tuberculin PPD and concanavalin A (Con A), IFN-gamma responses against J-PPD highest in affected animals.

Mullerad, J.; Hovav, A.; Fishman, Y.; Barletta, R.G.; Bercovier, H.  Antigenicity of Mycobacterium paratuberculosis superoxide dismutase in mice.  FEMS Immunology and Medical Microbiology.  2002; 34(1): 81-88.  ISSN:  0928-8244.
URL:  http://www.blackwellsynergy.com/servlet/useragent?func=showIssues&code=fim
NAL Call No.:  QR180.F46
Descriptors:  mice, cattle disease, Mycobacterium avium subsp. paratuberculosis, effective control needed, acellular vaccine, immunized mice with MPT superoxide dismutase alone or adjuvanted by Ribi, purified antigen in E. coli, results indicate exploring antigen for future acellular vaccine. 

Mullerad, Jacob; Michal, Israel; Fishman, Yolanta; Hovav, Avi Hai; Barletta Raul, G.; Bercovier, Herve. The immunogenicity of Mycobacterium paratuberculosis 85B antigen. Medical Microbiology and Immunology. March 2002; 190(4): 179-187. ISSN: 0300-8584.
Descriptors: Mycobacterium avium subsp. paratuberculosis, mouse model, laboratory experiment, immune response, recombinant MPT 85B in Ribi adjuvant, anti-85B antibody production of all classes tested, IgG1/IgG2a ratio, cellular vaccine candidate.

Murray, Dupont C. Vaccination against Johne's disease. Proceedings of the New Zealand Society of Animal Production. 2002; 62: 288-289. ISSN: 0370-2731.
NAL Call No.: 49.9 N483
Descriptors: control, immunogenic cell surface associated and secreted proteins, New Zealand field isolate, Mycobacterium avium subsp. paratuberculosis, possible subunit vaccine, adverse effects of vaccination, TB testing.

Muskens, J.; van Zijderveld, F.; Eger, A.; Bakker, D. Evaluation of the long-term immune response in cattle after vaccination against paratuberculosis in two Dutch dairy herds. Veterinary Microbiology. May 1, 2002; 86(3): 269-278. ISSN: 0378-1135.
URL: http://www.elsevier.com/locate/vetmic
NAL Call No.: SF601.V44
Descriptors: vaccination, paratuberculosis, tuberculosis, herd health, serological screening, cattle 3 years old, vaccine testing, heat killed paratuberculosis vaccine, 12-14 year study, 2 herds, The Netherlands, effect of vaccination on both cellular and humoral immune responses, paratuberculosis antigen, bovine tuberculosis antigen, long lasting interference, Mycobacterium avium subsp. paratuberculosis.

Mutwiri, George K.; Rosendal, Soren; Kosecka, Ula; Yager, Julie A.; Perdue, Mary; Snider, Denis; Butler, Daniel G. Adoptive transfer of BALB/c mouse splenocytes reduces lesion severity and induces intestinal pathophysiologic changes in the Mycobacterium avium subspecies paratuberculosis beige/scid mouse model. Comparative Medicine. August 2002; 52(4): 332-341. ISSN: 1532-0820.
NAL Call No.: SF77. C65
Descriptors: mouse model, beige/scid strain, resistance, introperitoneal inoculation, immune reconstruction.

Nettles, Victor F.; Quist, Charlotte F.; Lopez, Roel R.; Wilmers, Tom J.; Frank, Phil; Roberts, Wayne; Chitwood, Sharon; Davidson, William R.  Morbidity and mortality factors in Key deer (Odocoileus virginianus clavium).  Journal of Wildlife Diseases.  2002; 38(4): 685-692.  ISSN:  0090-3558.
URL:  http://www.jwildlifedis.org/
NAL Call No.:  41.9 W64B
Descriptors:  Key deer, Odocoileus virginianus clavium, wild animals, endangered species, protected species, population levels, causes of death, morbidity, mortality, nature reserves, postmortem examinations, pathogens, salmonellosis, Arcanobacterium pyogenes, Haemonchus contortus, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, Salmonella, Florida, United States.

New South Wales Agriculture.  Ovine Johne's Disease in New South Wales Quarterly Disease Surveillance Report. 2002.  Note:  Quarterly reports are at the website below.
URL:  http://www.dpi.nsw.gov.au/agriculture
Descriptors:  sheep, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, disease surveys, disease control, monitoring disease distribution and prevalence, epidemiology, New South Wales, Australia.

New Zealand Society of Animal Production.  62nd Conference, Massey University, New Zealand, 24-26 June 2002.  Proceedings of the New Zealand Society of Animal Production.  2002; 62: 388.  ISSN:  0370-2731.  Note:  A compilation of 92 scientific articles from a conference on dairy, sheep, and beef production.
NAL Call No.:  49.9 N483
Descriptors:  cattle, sheep, production systems, wool, milk, meat, nutrition, forages, Johne’s disease, reproduction, breeding, animal welfare, New Zealand.

Nielsen, Soren S.; Gronbaek, Carsten; Agger, Jens F.; Houe, Hans. Maximum-likelihood estimation of sensitivity and specificity of ELISAs and faecal culture for diagnosis of paratuberculosis. Preventive Veterinary Medicine. March 14, 2002; 53(3): 191-204. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis, 3 diagnostic tests, 2 ELISA’s, fecal cultures, use of tests for screening and for confirmation, discussion of test selection.

Nielsen, Soren S.; Enevoldsen, Carsten; Grohn, Yrjo T. The Mycobacterium avium subsp. paratuberculosis ELISA response by parity and stage of lactation. Preventive Veterinary Medicine. May 30, 2002; 54(1): 1-10. ISSN: 0167-5877.
URL: http://www.elsevier.com/locate/prevetmed
NAL Call No.: SF601.P7
Descriptors: ELISA, Johne’s disease, cows, milk samples, serum samples, antibody detection, interpretation, detection, tentative diagnosis.

Nielsen, S. S.; Grohn Y. T.; Quaas, R.L; Agger, J. F. Paratuberculosis in dairy cattle: Variation of the antibody response in offspring attributable to the dam. Journal of Dairy Science. February 2002; 85(2): 406-412. ISSN: 0022-0302.
URL: http://www.ADSA.org/jds
NAL Call No.: 44.8 J822
Descriptors: transmission factors, Mycobacterium avium subsp. paratuberculosis, dairy cattle, ELISA antibody testing, contribution from parents, heritability of susceptibility and vertical transmission, control programs, etiology, epidemiology.

Nielsen, K.K.; Ahrens, P.  Putative in vitro expressed gene fragments unique to Mycobacterium avium subspecies paratuberculosis.  FEMS  Microbiology Letters.  2002; 214(2): 199-203.  ISSN: 0378-1097.
URL:  http://www.blackwell-synergy.com/servlet/useragent?func=showIssues&code=fml
NAL Call No.:  QR1.F44
Abstract:  By a suppression subtractive hybridization based method, nine novel Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis) fragments of between 318 and 596 bp have been identified and characterized.  Database search revealed little or no similarity with other mycobacteria.  The uniqueness and diagnostic potential of seven of these fragments in relation to M. paratuberculosis closest relative Mycobacterium avium subsp. avium (M. avium) was confirmed by species-specific PCR and Southern blot.  Furthermore, RT-PCR indicated that eight of the nine fragments originate from areas of the genome that are expressed in vitro.
Descriptors:  Mycobacterium paratuberculosis, nucleotide sequences, Mycobacterium avium subsp. paratuberculosis.

Nielsen, S.S.  Variance components of an enzyme-linked immunosorbent assay for detection of IgG antibodies in milk samples to Mycobacterium avium subspecies paratuberculosis in dairy cattle.  Journal of Veterinary Medicine Series B.  2002; 49(8): 384-387.  ISSN:  0931-1793.
URL:  http://www.blackwellpublishing.com/journal.asp?ref=0931-1793&site=1
NAL Call No.:  41.8 Z52
Descriptors:  cattle, 120 cows, ELISA anitibody testing, Johne’s diagnosis, variance components, mixed model theory, milk sampling, Mycobacterium avium subsp. paratuberculosis, IgG, laboratory variability.

Nielsen, S.S.; Grohn, Y.T.; Enevoldsen, C.  Variation of the milk antibody response to paratuberculosis in naturally infected dairy cows.  Journal of Dairy Science.  2002; 85(11): 2795-2802.  ISSN:  0022-0302.
URL:  http://www.adsa.org/jds/abs/2002/d02B2795.htm
NAL Call No.:  44.8 J822
Descriptors:  812 dairy cows, milk antibody response, fecal culture, Mycobacterium avium subsp. paratuberculosis, asymptomatic infection, antibody formation, diagnostic methods, ELISA, longitudinal study, 4289 observations, model controlled for effect of herd, breed, laboratory effects, age of calving, effect over time of lactation.

Nsengwa, G.; Massele, R.M.; Udoba, C.N.A.  Further confirmation of Johne's disease at Kitulo Dairy Farm in southern highlands of Tanzania and its economic implication.  In:  Kazwala, R.R.; Mbaga, S.H.; Kusiluka, L.J.M.; Laswai, G.  Proceedings of the Joint 17th Scientific Conference of the Tanzania Society for Animal Production and the 20th Scientific Conference of the Tanzania Veterinary Association held at AICC Arusha, Tanzania, 3-5 December 2002.  Tanzania Society of Animal Production, Morogoro, Tanzania.  2002; 332-339.  
Descriptors:  dairy cows, dairy farms, Johne’s disease, case reports, Mycobacterium avium subsp. paratuberculosis, clinical aspects, post mortem examination, lesions, histopathology, economics, epidemiology, paratuberculosis, Tanzania.

Ocepek, M.; Krt, B.; Pate, M.; Pogacnik, M.  Seroprevalence of paratuberculosis in Slovenia between 1999 and 2001.  Slovenian Veterinary Research.  2002; 39(3/4): 179-185.  ISSN:  1580-4003.  Note:  In English with a Swedish summary.
Descriptors: 38,469 cattle serum samples, 12,578 sheep and goats serum samples Mycobacterium avium subsp. paratuberculosis, disease survey, disease prevalence, diagnostic techniques, antibody testing kits, ELISA, immunodiagnosis, movement of animals transmits disease, Slovenia.

O'Doherty, A.; O' Grady, D.; Smith, T.; Egan, J. Mycobacterium avium subsp. paratuberculosis in pasteurised and unpasteurised milk in the Republic of Ireland. Irish Journal of Agricultural and Food Research. June 2002; 41(1): 117-121. ISSN: 0791-6833.
NAL Call No.: S539.5.I74
Descriptors: milk samples, unpasteurized, bulk sampling, cattle, goats, retail pasteurized milk sampling, decontamination with hexadecyl pyridinium chloride, cultured for Mycobacterium avium subsp. paratuberculosis, Bactec B12B and Herrold's Egg Yolk medium.

O'Doherty, A.; O'Grady, D.; O'Farrell, K.; Smith, T.; Egan, J.  Survey of Johne's disease in imported animals in the Republic of Ireland.  Veterinary Record.  2002; 150(20): 634-636.  ISSN:  0042-4900.
URL:  http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  224 imported animals, 36 herd health, carriers of Mycobacterium avium subsp. paratuberculosis, serum testing, ELISA assay failed to detect animals in early stages of disease, feces, disease prevalence, data from disease survey, Denmark, France, Irish Republic, The Netherlands.

Olsen, I.; Siguroardottir, O. G.; Djonne, B. Paratuberculosis with special reference to cattle. A review. Veterinary Quarterly. February 2002; 24(1): 12-28. ISSN: 0165-2176.
NAL Call No.: SF601 V46
Descriptors: cattle disease, description, symptoms, world-wide economic effects, control, clinical importance, pathology, immunology, properties of infectious agent, identification of subclinical infections, diagnostic methods evaluated, Mycobacterium avium subsp. paratuberculosis.

O'Mahony, J.; Hill, C.  A real time PCR assay for the detection and quantitation of Mycobacterium avium subsp. paratuberculosis using SYBR Green and the Light Cycler. Journal of Microbiological Methods.  2002; 51(3): 283-293.  ISSN:  0167-7012.
URL:  http://www.elsevier.com/cdweb/views/article.htt?jnl=01677012&iss=3&vol=51&pii=S016770120200098%20
NAL Call No.:  QR65.J68
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne’s disease, Crohn’s disease, rapid detection methods, rapid real time PCR assay to detect and quantify, SYBR Gree and Lightcycler, P90, P91 primers, which amplify a 400-bp region of the IS900 element, can detect as few as 20 copies.

Pang, Victor Fei; Lee, Chia Hao; Chueh, Ling Ling; Liu, Chen Hsuan; Cheng, Chiung Hsian; Chiou, Huey Ing; Chang, Chih Cheng; Fu, Yng Bin; Chang, Chih Hua; Lee, Shu Hwae; Chen, Mei Ing; Shiau, Chung Jung; Chang, Chao Fu; Chi, Chau Haw; Jeng, Chian-Ren. Diagnosis and differentiation of mycobacterial infection in formalin-fixed and paraffin-embedded tissues of zoo animals by polymerase chain reaction. Taiwan Veterinary Journal. March 2002; 28(1): 80-87. ISSN: 1682-6485. Note: In Chinese.
NAL Call No.: SF604 C54
Descriptors: zoo animals, Mycobacterium, diagnosis of species of Mycobacterium tuberculosis, polymerase chain reaction (PCR) based method, non-radioactive labeled Southern blot hybridization, DNA fragment, 65 kD mycobacterial surface antigen of Mycobacterium tuberculosis, Mycobacterium bovis, Mycobacterium avium subsp. avium, Mycobacterium avium subsp. paratuberculosis, and Mycobacterium fortuitum, 38 kd protein antigen b of Mycobacterium tuberculosis and Mycobacterium bovis, in formalin-fixed and paraffin-embedded tissues.

Pillai, S.R.; Jayarao, B.M. Application of IS900 PCR for detection of Mycobacterium avium subsp. paratuberculosis directly from raw milk. Journal of Dairy Science. May, 2002; 85(5): 1052-1057. ISSN: 0022-0302.
URL: http://www.ADSA.org/jds
NAL Call No.: 44.8 J822
Descriptors: polymerase chain reaction-based assay, sequence 900, raw bulk milk samples, experimental inoculation, cattle milk sampling, Johne’s disease, sensitivity of assay.

Pitt, D.J.; Pinch, D.S.; Janmaat, A.; Condron, R.J.  An estimate of specificity for a Johne's disease absorbed ELISA in northern Australian cattle.  Australian Veterinary Journal.  2002; 80(1-2): 57-60.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  mature, beef cattle,  dairy cattle, blood sampling, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, bacterial diseases, beef cattle, dairy cattle, absorbed ELISA kit, tissue and fecal sampling, paratuberculosis, regional variations, Queensland, Northern Territory, Western Australia.

Quist, Charlotte F.; Nettles, Victor F.; Manning, Elizabeth J.B.; Hall, D.Greg; Gaydos, Joseph K.; Wilmers, Tom J.; Lopez, Roel R.  Paratuberculosis in Key deer (Odocoileus virginianus clavium).  Journal of Wildlife Diseases.  2002; 38(4): 729-737.  ISSN:  0090-3558.
URL:  http://www.jwildlifedis.org/
NAL Call No.:  41.9 W64B
Descriptors:  Key deer, Odocoileus virginianus clavium, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, disease surveys, fecal culture, serology, epidemiology, paratuberculosis, low prevalence, Florida, United States.

Radunz, B.  Johne's disease.  Agnote Northern Territory of Australia.  2002; (K30): 3.  ISSN:  0157-8243.
Descriptors:  cattle, goats, deer, Mycobacterium avium subsp. paratuberculosis, disease symptoms, clinical aspects, epidemiology, diagnosis, pathogenesis, disease transmission, Northern Territory, Australia.

Richter, Elvira; Wessling, Johannes; Luegering, Norbert; Domschke, Wolfram; Ruesch, Gerdes Sabine. Mycobacterium avium subsp. paratuberculosis infection in a patient with HIV, Germany. Emerging Infectious Diseases. July 2002; 8(7): 729-731. ISSN: 1080-6040.
NAL Call No.: RA648.5.E46
Descriptors: confirmed diagnosis, human, zoonotic disease, impared immune system, Germany.

Robbi, C.; Rossi, I.; Nardelli, S.; Rossi, E.; Toson, M.; Marangon, S.; Cestaro, F.; Vicenzoni, G.  Diagnosi della paratubercolosi bovina: studio sull'utilizzo di test multipli.  [Serological diagnosis of paratuberculosis by means of multiple tests.]  Atti della Societa Italiana di Buiatria.  2002; 34: 277-282.  Note:  In Italian with an English summary.
Descriptors:  cattle, serological testing, Mycobacterium avium subsp. paratuberculosis, disease control and prevention, accuracy of diagnostic tests, 2 different ELISA’s in a series, 1 for first screening, 1 to confirm positives from first test.

Robbi, C.; Rossi, I.; Nardelli, S.; Rossi, E.; Toson, M.; Marangon, S.; Vincenzi, G.; Vicenzoni, G.  Prevalenza di Paratubercolosi (Johnes disease) nella popolazione di bovine da latte della Regione Veneto.  [Prevalence of paratuberculosis (Johne's disease) in dairy farms of the Veneto Region.]  Atti della Societa Italiana di Buiatria.  2002; 34: 283-288.  Note:  In Italian with an English summary.  
Descriptors:  dairy cattle, dairy farms, Johne’s disease survey, serological monitoring for Mycobacterium avium subsp. paratuberculosis, seroprevalence, disease distribution, disease prevalence, disease surveys, ELISA, epidemiology, paratuberculosis, Veneto region, Italy. 

Samarineanu, M.; Medeanu, R.; Sarca, M.; Cismileanu, A.  ELISA kit for bovine paratuberculosis diagnosis.  Buletinul Universitatii de Stiinte Agricole si Medicina Veterinara Cluj Napoca, Seria Medicina Veterinara.  2002; 58: 426-434.  ISSN:  1454-2382.  
Descriptors:  antigen based on lipoarabinomannan from cultures of Mycobacterium avium subsp. paratuberculosis, used as a capture antigen in ELISA kit, diagnostic test, sera testing, PARACHEK, CST Australia, diagnostic value tested, Romania.

Secott, T.E.; Lin, T. L.; Wu, C. C. Fibronectin attachment protein is necessary for efficient attachment and invasion of epithelial cells by Mycobacterium avium subsp. paratuberculosis.
Infection and Immunity. May, 2002; 70(5): 2670-2675. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: Mycobacterium avium subsp. paratuberculosis, attachment, ingestion, 2 epithelial cells, effect of soluble fibromectin, disruption of FAP-P expression T-24 and Caco-2 calls.

Sergeant, E.S.G.; Baldock, F.C.  The estimated prevalence of Johne's disease infected sheep flocks in Australia.  Australian Veterinary Journal.  2002; 80(12): 762-768.  ISSN:  0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  ovine Johne’s disease, slaughter house surveillance, prevalence of infected flocks, Bayesian approach, cluster distribution shown, 3 regions of Australia.

Sergeant, E. S. G.; Whittington, R. J.; More, S. J. Sensitivity and specificity of pooled faecal culture and serology as flock-screening tests for detection of ovine paratuberculosis in Australia. Preventive Veterinary Medicine. January 22, 2002; 52(3-4): 199-211. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: sheep, pooled fecal culture, serological testing AGID, Johnes’s infected flocks, test sensitivity and reliability for flock health testing, surveillance and assurance programs, Australia.

Shafran, I.; Kugler, L.; El Zaatari, F. A. K.; Naser, S. A.; Sandoval, J. Open clinical trial of rifabutin and clarithromycin therapy in Crohn's disease. Digestive and Liver Disease. January 2002; 34(1): 22-28. ISSN: 1590-8658.
Descriptors: humans, Crohn's disease, etiology of Mycobacterium avium subsp. paratuberculosis, rifabutin and clarithromycin anti-Mycobacterium avium subsp. paratuberculosis treatment, evaluation of patient responses.

Simpson, V.R.  Wild animals as reservoirs of infectious diseases in the UK.  Veterinary Journal.  2002; 163(2): 128-146.  ISSN: 1090-0233.
URL:  http://journals.harcourt-international.com/wbs/tvj
NAL Call No.:  SF601.V484
Abstract:  This review aims to illustrate the extent to which wildlife act as reservoirs of infectious agents that cause disease in domestic stock, pet and captive animals and humans.  More than 40 agents are described.  In the case of some of these, e.g. Cryptosporidium spp., Escherichia coli O157 and malignant catarrhal fever, the current evidence is that wildlife either does not act as a reservoir or is of limited importance.  However, in the case of many important diseases, including bovine tuberculosis, Weil's disease, Lyme disease, avian influenza, duck virus enteritis and louping ill, wild animals are considered to be the principal source of infection.  Wildlife may be involved in the epidemiology of other major diseases, such as neosporosis, Johne's disease, mucosal disease and foot and mouth disease, but further studies are needed.  The UK would benefit from a more positive approach to the study of wildlife and the infections they harbour.
Descriptors:  wild animals, disease reservoir hosts, bacterial diseases, Johne’s disease, viral diseases, parasitoses, livestock, epidemiology, disease transmission, pathogens, literature reviews, United Kingdom.

Singh, Mahavir; Siddiqui, Mahtab Z.; Singh, R.P.  Intra-species mice hybridomas against a recombinant protein of Mycobacterium avium paratuberculosis.  Journal of Applied Animal Research.  2002; 22(1): 137-144.  ISSN:  0971-2119.
NAL Call No.:  SF55.I4J68
Descriptors:  35 kDa recombinant protein, Mycobacterium avium subsp. paratuberculosis primed Swiss white mice splenocytes with BALB/c derived myeloma cells, intra species mice hybridomas, peritoneal macrophages as feeder layer, 5 monoclonal antibodies, 1AG2, 2BD2, 2BG2, 1DE8, IgG2b, immunoblots.

Skjerve, E.  Emerging pathogenic bacteria of special interest; epidemiological concerns.  In:  Smulders, F.J.M.; Collins, J.D. [Editors].  Food Safety Assurance and Veterinary Public Health. Vol.1. Food Safety Assurance in the Pre harvest Phase.  Wageningen Academic Publishers.  Wageningen, Netherlands.  2002; 141-152.  ISBN:  9076998051.
Descriptors:  animal health, food production, food safety, foodborne illnesses, food contamination, drug resistance, epidemiology, public health, risk assessment, zoonoses, salmonellosis, Salmonella enteritidis, tuberculosis, Bacillus cereus, Escherichia coli, Mycobacterium avium subsp. paratuberculosis, Salmonella typhimurium.

Smith, D.R.  Epidemiologic tools for biosecurity and biocontainment.  Veterinary Clinics of North America, Food Animal Practice.  2002; 18(1): 157-175.  ISSN:  0749-0720.
NAL Call No.:  SF601.V535
Descriptors:  cattle, Johne’s disease, biosecurity concerns, etiology, diagnosis, disease prevention and control, epidemiology, probabilistic mathematical models.  

Soons, R.; Heuer, C.; Jackson, R.; Groenendaal. Computer simulation of Johne's disease in New Zealand dairy cattle. Proceedings of the New Zealand Society of Animal Production. 2002; 62: 294-298. ISSN: 0370-2731.
NAL Call No.: 49.9 N483
Descriptors: disease control, dairy herds, Mycobacterium avium subsp. paratuberculosis, review, models, the model 'JohneSSim', control measures, test and cull, contract heifer rearing, colostrum management, seasonal calving, risk factors, possible application to New Zealand.

Soto, J.P.; Kruze, J.; Leiva, S.  Aislamiento de Mycobacterium avium subsp. paratuberculosis de fecas en rebanos lecheros infectados mediante el Metodo de Cornell modificado.  [Isolation of Mycobacterium avium subsp. paratuberculosis from bovine feces of infected dairy herds by the Cornell's method modified.]  Archivos de Medicina Veterinaria.  2002; 34(2): 275-282.  ISSN:  0301-732X.  Note:  In Spanish with an English summary.
URL:  http://www.scielo.cl/scielo.php?script=sci_issues&pid=0301-732X&lng=en&nrm=iso
NAL Call No.:  SF604.A75
Descriptors: cattle, 14 dairy herds infected with Mycobacterium avium subsp. paratuberculosis, asymptomatic infections, fecal culture procedure, decontamination solution of hexadecylpiridinium chloride, antibiotic solution containing amphotericin B, vancomycin, and nalidixic acid, HEYM and mycobactin J with antibiotics used above as culture media, isolates testes with PCR with primer P90 and P91, low rates of contamination with high specificity makes it a good diagnostic techniques, Chile.

Soto, J.P.; Kruze, J.; Leiva, S.  Comparacion de tres metodos de diagnostico de Paratuberculosis bovina en rebanos lecheros infectados.  [Comparison of three different methods for the diagnosis of bovine paratuberculosis in infected dairy herds.]  Archivos de Medicina Veterinaria.  2002; 34(2): 265-273.  ISSN:  0301-732X.  Note:  In Spanish with an English summary.
URL:  http://www.scielo.cl/scielo.php?script=sci_issues&pid=0301-732X&lng=en&nrm=iso
NAL Call No.:  SF604.A75
Descriptors:  250 animals, 14 infected dairy herds, cattle, Mycobacterium avium subsp. paratuberculosis, asymptomatic infections, diagnosis, diagnostic techniques, feces, direct microscopic examination, fecal culture with Modified Herrold’s Medium, and serological testing with ELISA, 2 bacteriological methods, isolated culture identified with PCR, serological testing with ELISA IDEXX test kit, combination of fecal and sera testing seems most effective for infected asymptomatic animals.

Stabel, J. R.; Wells, S. J.; Wagner, B. A. Relationships between fecal culture, ELISA, and bulk tank milk test results for Johne's disease in US dairy herds. Journal of Dairy Science. March 2002; 85(3): 525-531. ISSN: 0022-0302.
URL: http://www.ADSA.org/jds
NAL Call No.: 44.8 J822
Descriptors: cows, estimate percentages of seropositive herds, Mycobacterium paratuberculosis in feces and milk, estimate of sensitivity, specificity, and predictive value, ELISA compared to fecal culture.

Stabel, J.R.; Ackermann, M.R.  Temporal Mycobacterium paratuberculosis infection in T-cell receptor (TCR)-alpha and TCR-delta-deficient mice.  Veterinary Immunology and Immunopathology.  2002; 89(3-4): 127-132.  ISSN:  0165-2427.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776
NAL Call No.:  SF757.2.V38
Descriptors:  Mycobacterium avium subsp. paratuberculosis, clinical aspects, Johne’s disease, cell mediated immunity, mice, disease models, laboratory animals, experimental infections, pathogenesis, strain differences, T lymphocytes.

Steadham, E.M.; Martin, B.M.; Thoen, C.O.  Production of a Mycobacterium avium ssp. paratuberculosis purified protein derivative (PPD) and evaluation of potency in guinea pigs.  Biologicals.  2002; 30(2): 93-95.  ISSN:  1045-1056.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6718&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=2c72079aa9cb5ae63c632d6d5dfb5966
Descriptors:  guinea pigs, laboratory animal models, Mycobacterium avium subsp. paratuberculosis, purified protein derivative, bacterial antigens, delayed type hypersensitivity, T lymphocytes.

Stephan, R.; Buhler, K.; Corti, S.  Incidence of Mycobacterium avium subspecies paratuberculosis in bulk-tank milk samples from different regions in Switzerland.  Veterinary Record.  2002; 150(7): 214-215.  ISSN:  0042-4900.   http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  501 raw milk samples, screened for Mycobacterium avium subsp. paratuberculosis, pathogen prevalence data shows variation in geographic regions, northeast, central and northwest regions of Switzerland.

Stevenson, K.; Hughes, V,M. ; De Juan, L.; Inglis, N.F.; Wright, F.; Sharp, J.M. Molecular characterisation of pigmented and non-pigmented isolates of Mycobacterium avium subsp. paratuberculosis. Research in Veterinary Science. April 2002; 72(Suppl. A): 29. ISSN: 0034-5288. Note: 56th Annual Conference of the Association of Veterinary Teachers and Research Workers on Current Topics in Veterinary Science, Scarborough, England, UK, March 25-27, 2002.
NAL Call No.: 41.8 R312
Descriptors: epidemiology, Mycobacterium avium subsp. paratuberculosis, non-pigmented isolates, pigmented isolates, sheep.

Stratmann, J.; Strommenger, B.; Stevenson, K.; Gerlach, G.F.  Development of a peptide-mediated capture PCR for detection of Mycobacterium avium subsp. paratuberculosis in milk.  Journal of Clinical Microbiology.  2002; 40(11): 4244-4250.  ISSN:  0095-1137.   http://www.pubmedcentral.gov/articlerender.fcgi?artid=139712
NAL Call No.:  QR46.J6
Descriptors:  dairy herds, naturally infected with Mycobacterium avium subsp. paratuberculosis, bulk milk testing, diagnostic method, recombinant bacteriophages isolated, phage peptides, one peptide sequence NYVIHDVPRHPA, designated aMP3, chemically synthesized, put on paramagnetic beads captured MAP, potential value as a screening tool. 

Surujballi, Om P.; Romanowska, Anna; Sugden, Edward A.; Turcotte, Claude; Jolley, Michael E. A fluorescence polarization assay for the detection of antibodies to Mycobacterium bovis in cattle sera. Veterinary Microbiology. [print] June 20, 2002; 87(2): 149-157. ISSN: 0378-1135.
URL: http://www.elsevier.com/locate/vetmic
NAL Call No.: SF601.V44
Descriptors: cattle, sera, fluorescence polarization assay, fluorescein-labelled MPB70 protein antigen, Mycobacterium bovis, accuracy of indicator test, lack of cross reaction.

Svastova, P.; Pavlik, I.; Bartos, M.  Rapid differentiation of Mycobacterium avium subsp. avium and Mycobacterium avium subsp. paratuberculosis by amplification of insertion element IS901.  Veterinarni Medicina.  2002; 47(5): 117-121.  ISSN:  0375-8427.  http://vetmed.vri.cz/
NAL Call No.:  41.9 C333
Descriptors:  Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, strain differences, Mycobacterium intracellulare, IS901, amplicons, DNA sequencing, transposable elements.

Swalve, H.H.; von Lengerken, G.  Beitrag der Tierzucht zur Lebensmittelsicherheit.  [Impact of animal breeding on food safety.]  Zuchtungskunde.  2002; 74(6): 403-412.  ISSN:  0044-5401.  Note:  In German with an English summary.
NAL Call No.:  49 Z8
Descriptors:  animal production, animal health, breeding for disease resistance and reduction zoonotic diseases, meat, milk, eggs, TSE, mastitis, E. coli, Mycobacterium avium subsp. paratuberculosis, stress susceptibility, role of gene identification and selection. 

Taragel, C.  Johne's disease zoning for goats.  Agnote NSW Agriculture.  2002; (DAI/100 (2nd edition)): 4 p.  ISSN:  1034-6848.  
Descriptors:  goats, Mycobacterium avium subsp. paratuberculosis, disease control, disease transmission, epidemiology, regulations, concerns regarding transport of animals, zoning, New South Wales, Australia.

Thompson, K. G.; West, D. M.; Anderson, P.V.A.; Burnham, D.L. Subclinical Johne's disease in sheep. Proceedings of the New Zealand Society of Animal Production. 2002; 62: 284-287. ISSN: 0370-2731.
NAL Call No.: 49.9 N483
Descriptors: sheep, subclinical infection, 5 year study, disease impact on productivity, vaccines, Mycobacterium avium subsp. paratuberculosis, Neoparasec, Gudair, experimental design.

Thornton, C.G.; MacLellan, K.M.; Stabel, J.R.; Carothers, C.; Whitlock, R.H.; Passen, S.  Application of the C18-carboxypropylbetaine specimen processing method to recovery of Mycobacterium avium subsp. paratuberculosis from ruminant tissue specimens.  Journal of Clinical Microbiology.  2002; 40(5): 1783-1790.  ISSN:  0095-1137.
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=130914
NAL Call No.:  QR46.J6
Descriptors:  tissue specimen processing method, bovine and bison tissues infected with Mycobacterium avium subsp. paratuberculosis, C18-carboxypropylbetaine (CB-18) treatment, lytic enzyme decontamination, ruminant tissues, BACTEC 12B liquid culture system supplemented with egg yolk emulsion, mycobactin J, pyruvate (12B/EMP), vancomycin, amphotericin B, nalidixic acid.

Tooker, B. C.; Burton, J. L.; Coussens, P. M. Survival tactics of M. paratuberculosis in bovine macrophage cells. Veterinary Immunology and Immunopathology. September 10, 2002; 87(3-4): 429-437. ISSN: 0165-2427.
URL: http://www.elsevier.com/locate/vetimm
NAL Call No.: SF757.2.V38
Descriptors: Mycobacterium avium subsp. paratuberculosis, vesicles of macrophage cells, 3 theories of survival, affects on host protein expression, interference with macrophage activation, entry avoids, macrophage activation, DDRT-PCR, gene expression comparison to E coli.

Tripathi, B.N.; Munjal, S.K.; Paliwal, O.P.  An overview of paratuberculosis (Johne's disease) in animals.  Indian Journal of Veterinary Pathology.  2002; 26(1/2): 1-10.  ISSN:  0250-4758.  Note:  A review.
Descriptors:  animal bacterial disease, disease surveys, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, diagnosis, diagnostic techniques, disease control and prevention, disease transmission, immunopathology, pathogenesis, physiopathology.

Vagnozzi, A.  Paratuberculosis: una revision bibliografica.  [Paratuberculosis: a bibliographic revision.]  Revista de Medicina Veterinaria Buenos Aires.  2002; 83(1): 9-13.  ISSN:  0325-6391.  Note:  In Spanish with an English summary.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, diagnosis, disease control, epidemiology, immune response.

Valentin-Weigand, P. Pathomechanismen und Immunreaktionen bei der Paratuberkulose.  [Pathogenesis and immunology of paratuberculosis.]  DTW (Deutsche Tieraerztliche Wochenschrift).  2002; 109(12): 507-509.  ISSN:  0341-6593.  Note:  In German with an English summary. 
NAL Call No.:  41.8 D482
Descriptors:  Mycobacterium avium subsp. paratuberculosis, factors regarding understanding pathogenesis, slow growth, taxonomy, limited molecular techniques, long incubation periods of natural infection, lack of laboratory model, role of macrophage in immune response, immunology.

Valentin-Weigand, P.  Tagung der Fachgruppe "Bakteriologie und Mykologie" der DVG vom 22. bis 25. Mai 2002 in Hannover, Germany.  [Meeting of the expert group on bacteriology and mycology of the German Veterinary Association, Hannover, 22-25 May 2002.]  Berliner und Munchener Tierarztliche Wochenschrift.  2002; 115(9/10): 321-350.  ISSN:  0005-9366.  Note: In German.  
NAL Call No.:  41.8 B45
Descriptors:  collection of 35 papers, diagnosis, diagnostic techniques for domestic animal diseases, characteristics of 3 important bacteria, Escherichia coli, Mycobacterium avium subsp. paratuberculosis, Yersinia.

Valheim, M.; Storset, A.K.; Aleksandersen, M.; Brun-Hansen, H.; Press, C.M.  Lesions in subclinical paratuberculosis of goats are associated with persistent gut-associated lymphoid tissue.  Journal of Comparative Pathology.  2002; 127(2/3): 194-202.  ISSN:  0021-9975.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=6861&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=6091bef4d15aae1adbceffba708c6eb8%20 NAL Call No.:  41.8 J82
Descriptors:  ruminants, goat kids, Peyer patches (PP) described, morphology, site of Mycobacterium avium subsp. paratuberculosis lesions, experimental infection effects after 2 years, subclinical stage finding described, persistent organized lymphoid tissue in jejunum PP (JPPs) and ileocaecal-valve PP (ICVPP), but not involuted ileal PP (IPP), sustains the development of granulomatous inflammation.

Valheim, M.; Hasvold, H.J.; Storset, A.K.; Larsen, H.J.S.; Press, C.McL.  Localisation of CD25+ cells and MHCII+ cells in lymph nodes draining Mycobacterium avium subsp. paratuberculosis vaccination granuloma and the presence of a systemic immune response.  Research in Veterinary Science.  2002; 73(1): 77-85.  ISSN:  0034-5288.
URL: http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=7137&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=de976ce390543b0c4a1081aa5ff3686fauth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=de976ce390543b0c4a1081aa5ff3686f NAL Call No.:  41.8 R312
Descriptors:  goats, vaccination of goat kids, Mycobacterium avium subsp. paratuberculosis, systemic cellular response, peripheral blood cells, interferon gamma production, expression of interleukin 2 receptor, granuloma, immune-response, interferon, lymph nodes, MHCII+ cells, CD4+T cells, major histocompatibility complex, paratuberculosis, T lymphocytes, CD25+ lymphocytes.

Van Leeuwen, J. A.; Keefe, G. P.; Tiwari, A Seroprevalence and productivity effects of infection with bovine leukemia virus, Mycobacterium avium subspecies paratuberculosis, and Neospora caninum in Maritime Canadian dairy cattle. Bovine Practitioner. June 2002; 36(2): 86-91. ISSN: 0524-1685.
NAL Call No.: SF779.5.A1B6
Descriptors: 90 dairy cattle herds, subclinical infection effects, milk production, serum sampling, ELISA antibody testing, Canada.

Veerabadran Dheenadhayalan; Shin, K.S.; Chang, C.F.; Chang, C.D.; Wang, S.J.; McDonough, S.; McDonough, P.; Stehman, S.; Shin, S.; Torres, A.; Chang, Y.F.  Cloning and characterization of the genes coding for antigen 85A, 85B and 85C of Mycobacterium avium subsp. paratuberculosis.  DNA Sequence.  2002; 13(5): 287-294.  ISSN:  1042-5179.
DNA Sequence:  GenBank Accession no.:  AF280067, AF280068, AF219121
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, antigens, genes, molecular genetics, genetic analysis, DNA cloning, binding proteins, fibronectins.

Vialard, J.  La paratubercolosi caprina.  Caprine paratuberculosis.  Summa.  2002; 19(4): 39-45.  Note:  In Italian with an English summary.  
Descriptors:  goats, Mycobacterium avium subsp. paratuberculosis, clinical aspects, diagnosis.  

Vihan, V.S.  Evaluation of ELISA using wild type species-specific sonicated antigen for diagnosis of Mycobacterium paratuberculosis in goats.  Indian Journal of Veterinary Medicine.  2002; 22(1): 21-24.  ISSN:  0970-051X.
Descriptors:  121 goats, sera samples, diagnosis of Johne’s disease, Mycobacterium avium subsp. paratuberculosis, wild purified sonicated antigen from ileum mucosa of infected goats, antigen preparation, ELISA, checked against fecal culture, sensitivity and specificity were high with low false positives.

Waldner, C.L.; Cunningham, G.L.; Janzen, E.D.; Campbell, J.R.  Survey of Mycobacterium avium subspecies paratuberculosis serological status in beef herds on community pastures in Saskatchewan.  Canadian Veterinary Journal.  2002; 43(7): 542-546.  ISSN:  0008-5286.  Note:  In English with a French summary.
URL:  http://www.pubmedcentral.nih.gov/tocrender.fcgi?action=archive&journal=202
NAL Call No.:  41.8 R3224
Descriptors:  beef herds, commercial cow-calf operations, community pastures, disease prevalence, disease control, blood sampling of 1799 animals, sera testing, ELISA, Mycobacterium avium subsp. paratuberculosis, low prevalence found, future research, identify risk factors and control points, target problem herds, utilize a case-control study design, Saskatchewan, Canada.

Walravens, K.; Marche, S.; Rosseels, V.; Wellemans, V.; Boelaert, F.; Huygen, K.; Godfroid, J. IFN-gamma diagnostic tests in the context of bovine mycobacterial infections in Belgium. Veterinary Immunology and Immunopathology. September 10, 2002; 87(3-4): 401-406. ISSN: 0165-2427.
URL: http://www.elsevier.com/locate/vetimm
NAL Call No.: SF757.2.V38
Descriptors: cattle tuberculosis, Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis, testing strategies, differentiation between species, IFN-gamma responses of animals, experimental infection.

Waters, W. R.; Sacco, R. E.; Fach, S. J.; Palmer, M. V.; Olsen, S. C.; Kreeger, T. J. Analysis of mitogen-stimulated lymphocyte subset proliferation and nitric oxide production by peripheral blood mononuclear cells of captive elk (Cervus elaphus). Journal of Wildlife Diseases. April 2002; 38(2): 344-351. ISSN: 0090-3558.
NAL Call No.: 41.9 W64B
Descriptors: elk, animal reservoirs, Brucella abortus, Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis, immune responses, peripheral blood mononuclear cells, gammadelta TCR+ cells, pokeweed mitogen (PWM) stimulation, nitric oxide production, sIgM+ cells co-expressed MHC class II and B-B4, a B cell lineage marker.

Weber, M.F.; Groenendaal, H.; van Roermund, H.J.W.; Nielen, M.  Simulation of alternative for the Dutch Johne's disease certification programme.  In:  Menzies, F.D.; Reid, S.W.J.  Society for Veterinary Epidemiology and Preventive Medicine Twentieth Anniversary Proceedings of a Meeting Held at University of Cambridge, UK, 3-5 April, 2002.  Published by the Society.  Roslin, UK.  2002; 178-188.  ISBN:  0948073543.
NAL Call No.:  SF780.9.S63
Descriptors:  dairy cattle herds, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, animal health certification, disease surveys, disease control, disease prevalence, economic impact, stochastic models, The Netherlands.

Weersink, A.; Van Leeuwen, J.A.; Chi, J.; Keefe, G.P.  Direct production losses and treatment costs due to four dairy cattle diseases.  Advances in Dairy Technology.  2002; 14: 55-75.  ISSN: 1184-0684.  Note:  Paper presented at the Western Canadian Dairy Seminar, March 5-8, 2002, Red Deer, Alberta.
URL:  http://www.afns.ualberta.ca/wcds/%20Access%20method:%20http
NAL Call No.:  SF223.W478
Descriptors:  dairy cows, bovine diarrhea virus, bovine leucosis, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, yield losses, Johne's disease, Maritime Provinces, Canada.

Weiss, D.J.; Evanson, O.A.; Moritz, A.; Deng, M.Q.; Abrahamsen, M.S.  Differential responses of bovine macrophages to Mycobacterium avium subsp. paratuberculosis and Mycobacterium avium subsp. avium.  Infection and Immunology.  2002.  70(10): 5556-5561.  ISSN: 0019-9567.
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=128321
NAL Call No.:  QR1.I57
Abstract:  Mycobacterium avium subsp. paratuberculosis and Mycobacterium avium subsp. avium are antigenically and genetically similar organisms; however, they differ in their virulence for cattle.  M. avium subsp. paratuberculosis causes a chronic intestinal infection leading to a chronic wasting disease termed paratuberculosis or Johne's disease, whereas M. avium subsp. avium causes only a transient infection.  We compared the response of bovine monocyte-derived macrophages to ingestion of M. avium subsp. paratuberculosis and M. avium subsp. avium organisms by determining organism survival, superoxide and nitric oxide production, and expression of the cytokines tumor necrosis factor alpha (TNF-alpha), gamma interferon (IFN-gamma), interleukin-8 (IL-8), IL-10, IL-12, and granulocyte-monocyte colony-stimulating factor (GM-CSF).  Unlike M. avium subsp. paratuberculosis, macrophages were able to kill approximately half of the M. avium subsp. avium organisms after 96 h of incubation.  This difference in killing efficiency was not related to differences in nitric oxide or superoxide production.  Compared to macrophages activated with IFN-gamma and lipopolysaccharide, macrophages incubated with M. avium subsp. paratuberculosis showed greater expression of IL-10 and GM-CSF (all time points) and IL-8 (72 h) and less expression of IL-12 (72 h), IFN-gamma (6 h), and TNF-alpha (6 h).  When cytokine expression by macrophages incubated with M. avium subsp. paratuberculosis was compared to those of macrophages incubated with M. avium subsp. avium, M. avium subsp. paratuberculosis-infected cells showed greater expression of IL-10 (6 and 24 h) and less expression of TNF-alpha (6 h).  Therefore, the combination of inherent resistance to intracellular degradation and suppression of macrophage activation through oversecretion of IL-10 may contribute to the virulence of M. avium subsp. paratuberculosis in cattle.
Descriptors:  cattle, virulence differences, bovine macrophages, killing efficiency, cell survival Mycobacterium avium subsp. paratuberculosis, Johne’s disease, Mycobacterium avium subsp. avium, cytokines, immunopathology.

Wells, S.J.; Dee, S.; Godden, S.  Biosecurity for gastrointestinal diseases of adult dairy cattle.  Veterinary Clinics of North America, Food Animal Practice.  2002; 18(1): 35-55.  ISSN:  0749-0720.
NAL Call No.:  SF601.V535
Descriptors:  dairy cattle, dairy herds, adult animals, Mycobacterium avium subsp. paratuberculosis, Salmonella, animal health, biosecurity concerns, Johne’s disease, disease control, disease transmission, gastrointestinal diseases, risk assessment.

Wells, Scott J.; Whitlock, Robert H.; Lindeman, Cynthia J. ; Fyock, Terry Evaluation of bacteriologic culture of pooled fecal samples for detection of Mycobacterium paratuberculosis. American Journal of Veterinary Research. August 2002; 63(8): 1207-1211. ISSN: 0002-9645.
NAL Call No.: 41.8 Am3A
Descriptors: cattle, concentration of organisms, detection sensitivity, methods recommended to survey disease levels of cattle herds, Mycobacterium avium subsp. paratuberculosis.

Wells, Scott J.; Whitlock, Robert H.; Wagner, Bruce A.; Collins, James; Garry, Franklyn; Hirst, Heather; Lawrence, John; Saville, William J. A.; Naugle, Alecia L. Larew. Sensitivity of test strategies used in the Voluntary Johne's Disease Herd Status Program for detection of Mycobacterium paratuberculosis infection in dairy cattle herds. Journal of the American Veterinary Medical Association. April 1, 2002; 220(7): 1053-1057. ISSN: 0003-1488.
URL: http://www.avma.org
NAL Call No.: 41.8 Am3
Descriptors: dairy cattle herd evaluation, reliability of the Voluntary Johne's Disease Herd Status Program (VJDHSP), 64 dairy herds from Pennsylvania, Minnesota, Colorado, Ohio, and Wisconsin, serum testing for antibodies to Mycobacterium avium subsp. paratuberculosis, fecal testing.

West, D. M. Johne's disease: Why Johne's disease is so difficult to control. Proceedings of the New Zealand Society of Animal Production. 2002; 62: 282-283. ISSN: 0370-2731.
NAL Call No.: 49.9 N483
Descriptors: Mycobacterium avium subsp. paratuberculosis, cattle, sheep, goats, deer, control issues, incubation periods, pathogen survival, subclinical infection shedding, unreliability of diagnostic tests, control comparisons between New Zealand and Australia.

Wilson, P.R.  Bacterial infections reported in New Zealand farmed deer.  Surveillance Wellington.  2002; 29(3): 13-16.  ISSN:  0112-4927.
NAL Call No.:  SF604.63.N455S87
Descriptors:  farmed deer, bacterial diseases, disease prevalence, epidemiology, clinical aspects, Actinobacillus, Arcanobacterium pyogenes, Brucella ovis, Campylobacter fetus, Clostridium, Dermatophilus congolensis; Dichelobacter nodosus, Escherichia coli, Fusobacterium necrophorum, Leptospira, Listeria monocytogenes, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, Pasteurella multocida, Salmonella typhimurium, Yersinia pseudotuberculosis, New Zealand.

Winterhoff, C.; Beyerbach, M.; Homuth, M.; Strutzberg, K.; Gerlach, G. F. Etablierung und Evaluation eines ELISA zum Nachweis von Antikoerpern gegen Mycobacterium avium sub-species paratuberculosis in Milch. [Evaluation of an ELISA for the detection of Mycobacterium avium subsp. paratuberculosis-specific antibodies in milk.] Deutsche Tieraerztliche Wochenschrift. Mai 2002; 109(5): 230-234. ISSN: 0341-6593. Note: In German.
NAL Call No.: 41.8 D482
Descriptors: dairy farms, economically viable diagnostic method, antibody detection, Svanovir(R) ELISA, milk testing.

Zwick, L.S.; Walsh, T.F.; Barbiers, R.; Collins, M.T.; Kinsel, M.J.; Murnane, R.D.  Paratuberculosis in a mandrill (Papio sphinx).  Journal of Veterinary Diagnostic Investigation. 2002; 14(4): 326-328.  ISSN:  1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  mandrill, Mandrillus sphinx, Papio sphinx, zoo animal, amyloidosis, lymphadentis, enterocolitis, Mycobacterium avium subsp. paratuberculosis, histopathology, clinical aspects, case report, Illinois, United States.


Return to Contents

2001

Allen, S.; Sotos, J.; Sylte, M. J.; Czuprynski, C. J. Use of hoechst 33342 staining to detect apoptotic changes in bovine mononuclear phagocytes infected with Mycobacterium avium subsp. paratuberculosis. Clinical and Diagnostic Laboratory Immunology. March, 2001; 8(2): 460-464. ISSN: 1071-412X.
Descriptors: cattle white cells, apoptosis in bovine monocytes, Hoechst 33342 staining, experimental infection effects, viable bacilli, effects of preincubation of monocytes with bovine growth hormone pre infection.

Atala, N.; Akcay, E.  Turkiye genelinde sgr paratuberkulozu prevalansnn ELISA ile arastrlmas.  [Prevalence of paratuberculosis in the Turkish cattle population by using absorbed ELISA.]  Etlik Veteriner Mikrobiyoloji Dergisi.  2001; 12(1/2): 39-48.  ISSN:  1016-3573.  Note:  In Turkish with an English summary.
Descriptors:  8873 sera samples from cattle, Mycobacterium avium subsp. paratuberculosis, epidemiology, disease distribution, disease prevalence, seroprevalence, absorbed ELISA, 9 provinces, Turkey.  

Ayele, W.Y.; Machackova, M.; Pavlik, I.  The transmission and impact of paratuberculosis infection in domestic and wild ruminants.  Veterinarni Medicina.  2001; 46(7/8): 205-224.  ISSN:  0375-8427.
URL:  http://vetmed.vri.cz/
NAL Call No.:  41.9 C333
Descriptors:  dromedary camels, deer, cattle, wild goats, wild sheep, Mycobacterium avium subsp. paratuberculosis, epidemiology, chronic course, clinical aspects, feces, milk, disease prevention and control, disease prevalence, disease transmission, productive organs, reviews, wild animals, wild goats, wild sheep.

Banasure, K.D.; Basagoudanavar, S.H.; Chaudhury, P.; Tiwari, V.; Parihar, N.S.; Goswami, P.P. Identification and characterization of a gene encoding a 35-kDa protein from Mycobacterium avium subspecies paratuberculosis. FEMS Microbiology Letters. Mar 15, 2001; 196(2): 195-199. ISSN: 0378-1097.
NAL Call No.: QR1.F44
Abstract: Mycobacterium avium subspecies paratuberculosis is the causative agent in Johne's disease, a chronic enteritis in ruminants. A gene homologous to that of 35-kDa antigen of Mycobacterium leprae was cloned and sequenced from Mycobacterium paratuberculosis. The database searches revealed 82.79% and 95.67% similarities of its nucleotide sequence, with those of immunodominant 35-kDa protein of M. leprae and M. avium, respectively.
Descriptors: Mycobacterium avium subsp. paratuberculosis, Johne's disease, ruminant enteritis, Mycobacterium leprae, nucleotide sequence comparison.

Bannantine, John P.; Stabel, Judith R. Identification of two Mycobacterium avium subspecies paratuberculosis gene products differentially recognised by sera from rabbits immunised with live mycobacteria but not heat-killed mycobacteria. Journal of Medical Microbiology. September, 2001; 50(9): 795-804. ISSN: 0022-2615.
NAL Call No.: QR1.J62
Descriptors: Csp1 was present in infected macrophages, novel antigens, pathogenesis.

Bannantine, J. P.; Zang, Q.; Li, L.; Kapur, V. Identification of unique regions within two genetically similar mycobacterial genomes. Abstracts of the General Meeting of the American Society for Microbiology. 2001; 101: 703-704. ISSN: 1060-2011. Note: 101st General Meeting of the American Society for Microbiology, Orlando, FL, USA, May 20-24, 2001.
NAL Call No.: QR1.A5
Descriptors: Mycobacterium avium subsp. avium, Mycobacterium avium subsp. paratuberculosis, homology of genomes, non-aligned sequences 7 and 481, mycobacteriophage, possible application for diagnostic tests.

Beard, P. M.; Stevenson, K.; Pirie, A.; Rudge, K.; Buxton, D.; Rhind, S. M.; Sinclair, M. C.; Wildblood, L. A.; Jones, D. G.; Sharp, J. M. Experimental paratuberculosis in calves following inoculation with a rabbit isolate of Mycobacterium avium subsp. paratuberculosis. Journal of Clinical Microbiology. 2001; 39(9): 3080-3084. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: rabbits as reservoir of Mycobacterium avium subsp. paratuberculosis, Scotland, experimental infection of calves with rabbit strain, strain virulence, wildlife reservoir potential of rabbits, factors for control measures.

Beard, P. M.; Rhind, S. M.; Buxton, D.; Daniels, M. J.; Henderson, D.; Pirie, A.; Rudge, K.; Greig, A.; Hutchings, M. R.; Stevenson, K.; Sharp, J. M. Natural paratuberculosis infection in rabbits in Scotland. Journal of Comparative Pathology. May 2001; 124(4): 290-299. ISSN: 0021-9975.
NAL Call No.: 41.8 J82
Descriptors: 110 rabbits tested, Oryctolagus cuniculus, pathology, Mycobacterium avium subsp. paratuberculosis, histopathological lesions, granulomata, giant cells, formalin fixed, paraffin wax embedded tissues.

Beard, P.M.; Daniels, M.J.; Henderson, D.; Pirie, A.; Rudge, K.; Buxton, D.; Rhind, S.; Greig, A.; Hutchings, M.R.; McKendrick, I.  Paratuberculosis infection of nonruminant wildlife in Scotland.  Journal Clinical Microbiology.  2001; 39(4): 1517-1521.  ISSN: 0095-1137.
URL:  http://www.pubmedcentral.gov/articlerender.fcgi?artid=87963
NAL Call No.:  QR46.J6
Descriptors:  Mycobacterium avium subsp. paratuberculosis, epidemiology wild life species, reservoir hosts, Scotland.

Belloli, Angelo; Carli, Silvano; Pravettoni, Davide; Proverbio, Daniela; Giangaspero, Massimo; Lauzi, Stefania; Bonizzi, Luigi. Case study: Attempted treatment of a cow with Mycobacterium paratuberculosis enterocolitis. Bovine Practitioner. January 2001; 35(1): 56-60. ISSN: 0524-1685. Note: In English with French and English summaries.
NAL Call No.: SF779.5.A1B6
Descriptors: Holstein-Friesian dairy cow, naturally infection, Mycobacterium avium subsp. paratuberculosis, enterocolitis, oral treatment rifampin, pyrazinamide and streptomycin for 7 days, fecal sampling, effects in populations of Mycobacterium avium subsp. paratuberculosis.

Boor, Kathryn J. Fluid dairy product quality and safety: Looking to the future. Journal of Dairy Science. January 2001; 84(1): 1-11. ISSN: 0022-0302.
URL: http://www.ADSA.org/jds
NAL Call No.: 44.8 J822
Descriptors: milk based beverages, food safety, shelf life, control of contamination, thermal resistance characteristics, Mycobacterium avium subsp. paratuberculosis.

Brugere-Picoux, J.; Maillard, R.; Douart, A.  Pathologie digestive bovine paratuberculose: quels tests de diagnostic utiliser?  [Pathology of bovine paratuberculosis: which diagnostic tests to use?]  Point Veterinaire.  2001; 32(220): 50-53.  ISSN:  0335-4997.  Note:  In French with an English summary.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, diagnosis, discussion of various diagnostic techniques.

Brugere-Picoux, J.; Maillard, R.; Douart, A.  Pathologie digestive des ruminants: etude clinique de la paratuberculose bovine.  [Digestive pathology of ruminants: clinical study of bovine paratuberculosis.]  Point Veterinaire.  2001; 32(220): 20-22.  ISSN:  0335-4997.  Note:  In French with an English summary.  
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, lesions, clinical aspects, laboratory diagnosis, paratuberculosis.

Burton, Michael S.; Olsen, John H.; Ball, Ray L.; Dumonceaux, Genevieve A. Mycobacterium avium subsp. paratuberculosis infection in an addax (Addax nasomaculatus). Journal of Zoo and Wildlife Medicine. June 2001; 32(2): 242-244. ISSN: 1042-7260.
NAL Call No.: SF601 J6
Descriptors: Addax nasomaculatus, captive bred male addax, Mycobacterium avium subsp. paratuberculosis, fecal sample, serology, semen culture, tissue biopsy, ileum, jejunum, colon, mesenteric lymph node.

Caracappa, S.; Calabro, A.; Cassata, G.; Ferrantelli, V.; Dara, S.; Cascone, G.; Vullo, S.; Glorioso, N.S.  La paratubercolosi bovina: una emergenza sanitaria.  Bovine paratuberculosis as a health emergency.  Atti della Societa Italiana di Buiatria.  2001; 33: 119-124.  Note:  In Italian.  
Descriptors:  Johne’s disease, Mycobacterium avium subsp. paratuberculosis, level of disease incidence, zoonotic potential, Italy.

Chamberlin, W.; Graham, D. Y.; Hulten, K.; El Zimaity, H. M. T.; Schwartz, M. R.; Naser, S.; Shafran, I.; El Zaatari, F. A. K. Review article: Mycobacterium avium subsp. paratuberculosis as one cause of Crohn's disease. Alimentary Pharmacology and Therapeutics. March 2001; 15(3): 337-346. ISSN: 0269-2813.
Descriptors: etiology, zoonotic disease potential, possible cause of Crohn’s disease, review of the literature.

Cheville, N. F.; Hostetter, J.; Thomsen, B. V.; Simutis, F.; Vanloubbeeck, Y.; Steadham, E. Intracellular trafficking of Mycobacterium avium ss. paratuberculosis in macrophages. DTW Deutsche Tieraerztliche Wochenschrift. June 2001; 108(6): 236-243. ISSN: 0341-6593. Note: In English with English and Germany summaries.
NAL Call No.: 41.8 D482
Descriptors: Johne’s disease, cattle, bacterial growth in macrophages, immunocytochemical markers for light, confocal and electron microscopy, bacterial attachment, phagosomal acidification, phagolysosomal degradation and apoptosis, blockage of phagosomes, nude mouse model, bacteriophorous vacuole formation.

Chi JunWook; Weersink, A.; Van Leeuwen, J.A.; Keefe, G.P.  The economics of controlling infectious diseases on dairy farms.  Working Paper Department of Agricultural Economics and Business, University of Guelph.  2001; (02/03): 36.
Descriptors:  dairy farms, cost effective disease control, theoretical model on economics of livestock disease, empirical model for optimal set of control strategies, 4 diseases, bovine viral diarrhea, enzootic bovine leucosis, Johne's disease, and neosporosis, direct production losses, control expenditures (based on Maritime provinces, new animal check, adequate vaccinations, Canada.

Christensen, J.; Dantzer, V.  Panel discussion.  In:  Elvander, M.; Lindberg, A.; Christensen, B.  Acta Veterinaria Scandinavica, Supplementum.  2001; (supp. 94): 95.  ISSN:  0065-1699.
NAL Call No.:  41.8 AC87 Suppl.
Descriptors:  Johne’s disease, Mycobacterium avium subsp. paratuberculosis, animal diseases, diagnostic techniques, disease prevalence, disease prevention, documentation, monitoring, paratuberculosis, risk assessment, surveillance, Scandinavia.

Collett, M.G.; West, D.M.  A comparison of the injection site and draining lymph node pathology induced by an attenuated live and a killed Johne's disease vaccine in sheep.  In: Proceedings of the 5th International Sheep Veterinary Conference, University of Stellenbosch, South Africa, 21-25 January, 2001.  Bayer AG, Leverkusen, Germany.  2001; unpaginated.
Descriptors:  ewes, sheep, lambs, vaccinated with live-attenuated Mycobacterium avium subsp. paratuberculosis vaccine, injection site, draining lymph node, histopathology.

Collins, Michael T.; Lisby, Gorm; Moser, Claus; Chicks, Debra; Christensen, Steen; Reichelderfer, Mark; Hoiby, Niels; Harms, Bruce A.; Thomsen, Ole O.; Skibsted, Ulrik; Binder, Vibeke. Results of multiple diagnostic tests for Mycobacterium avium subsp. paratuberculosis in patients with inflammatory bowel disease and in controls. Journal of Clinical Microbiology. December 2001; 38(12): 4373-4381. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: diagnostic tests compared, 5 methods routinely used on animals, PCR for IS900, etiopathogenesis of IBD.

Corn, Joseph L.; Nettles, Victor F. Health protocol for translocation of free-ranging elk. Journal of Wildlife Diseases. July 2001; 37(3): 413-426. ISSN: 0090-3558.
NAL Call No.: 41.9 W64B
Descriptors: elk, Cervus elaphus, restoration programs, issues of translocation, disease concerns, health status, classification of infectious agents and ectoparasites, ability to establish disease in new area, potential damage to wildlife in new area, list of many diseases and parasites, including Mycobacterium avium subsp. paratuberculosis.

Council for Agricultural Science and Technology.  Johne's disease in cattle.  Issue Paper Council for Agricultural Science and Technology.  2001; (17): 1-10.
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, etiology, clinical aspects, diagnosis, disease control, vaccination, disease transmission, treatment. 

Coussens, P. M.; Tooker, B.; Nobis, W.; Coussens, M. J. Genetics and genomics of susceptibility to mycobacterial infection in cattle. Journal of Dairy Science. 2001; 84(Suppl. 1): 57. ISSN: 0022-0302. Note: Joint Meeting of the American Dairy Science Association, American Meat Science Association, American Society of Animal Science and the Poultry Science Association, Indianapolis, Indiana, USA, July 24-28, 2001.
URL: http://www.ADSA.org/jds
NAL Call No.: SF221 A4
Descriptors: cattle, susceptibility to disease factors, breeding, genetics, genomics, Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis.

Coussens, Paul M. Mycobacterium paratuberculosis and the bovine immune system. Animal Health Research Reviews. December 2001; 2(2): 141-161. ISSN: 1466-2523.
NAL Call No.: SF601.A547
Descriptors: cattle, immunity, pathology, Johne's disease, immune response.

Cuteri, V.; Morgante, M.; Ranucci, S.; Valente, C.  Use of an indirect ELISA for the diagnosis of paratuberculosis in alpaca (Lama pacos).  In:  Gerken, M.; Renieri, C. [Editors].  Progress in South American Camelids Research.  Proceedings of the 3rd European  Symposium and SUPREME European Seminar, Gottingen, Germany, 27-29 May 1999.  Wageningen Pres, Wageningen, Netherlands.  2001; 239-242.  ISBN:  9074134912.  Note:  In English with a Spanish summary.
NAL Call No.:  49.9 EU7 no. 105
Descriptors:  alpacas, Mycobacterium avium subsp. paratuberculosis, Mycobacterium phlei, diagnosis, indirect ELISA, paratuberculosis.

Daniels, M.J.; Ball, N.; Hutchings, M.R.; Greig, A. The grazing response of cattle to pasture contaminated with rabbit faeces and the implications for the transmission of paratuberculosis. Veterinary Journal. May 2001; 161(3): 306-313. ISSN: 1090-0233.
NAL Call No.: SF601.V484
Abstract: Transmission of Mycobacterium avium subspecies paratuberculosis, the organism responsible for paratuberculosis (or Johne's disease) in ruminants, occurs through the faecal-oral route. As M. a. paratuberculosis has been isolated from rabbit faeces, cattle grazing rabbit faecal contaminated pasture may thus be at risk. A herd of 57 beef cattle was monitored on a farm in Perthshire, throughout the 1999 'grazing year', to investigate whether the cattle avoided rabbit faecal contaminated pasture and thus the potential for disease transmission. Grazing was measured every two days over eight rotations by sward heights on 40 marked treatment plots (0.5 m X 0.5 m) to which 0, 10, 50 and 250 rabbit faecal pellets were added. Cattle were also monitored by an active transponder system which enabled individual animals contacting two plots per field rotation (one control and one contaminated) to be recorded. During the monitored grazing year, grazing pressure was low with a net mean sward offtake of 18% of sward height per rotation. There were no significant differences between rabbit faecal treatments (0, 10, 50 and 250 pellets) with respect to the height or proportion of sward removed, or between the numbers of contacts made by cattle on contaminated and uncontaminated plots. Over 90% of all the cattle contacted contaminated plots, indicating that the potential for disease transmission was widespread among the herd. To our knowledge, this is the first reported instance of a lack of avoidance by grazing cattle towards swards contaminated with faeces, and implies that the potential for transmission of paratuberculosis from rabbit contaminated pasture is high.
Descriptors: beef cattle, Johne's disease, grazing behavior, pastures, rabbit fecal droppings, microbial contamination, disease transmission, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, disease transmission risk, Scotland.

Dargatz, David A.; Byrum, Beverly A.; Barber, Linda K.; Sweeney, Raymond W.; Whitlock, Robert H.; Shulaw, William P.; Jacobson, Richard H.; Stabel, Judith R. Evaluation of a commercial ELISA for diagnosis of paratuberculosis in cattle. Journal of the American Veterinary Medical Association. April 1, 2001; 218(7): 1163-1166. ISSN: 0003-1488.
NAL Call No.: 41.8 Am3
Descriptors: evaluate sensitivity and specificity, new ELISA for antibodies, Mycobacterium avium subsp. paratuberculosis, serum samples, cattle, level of test sensitivity and reliability, interpretation of test results.

Dargatz, David A.; Byrum, Beverly A.; Hennage,r Steven G.; Barber, Linda K.; Kopral, Christine A.; Wagner, Bruce A.; Wells, Scott J. Prevalence of antibodies against Mycobacterium avium subsp. paratuberculosis among beef cow-calf herds. Journal of the American Veterinary Medical Association. August 15, 2001; 219(4): 497-501. ISSN: 0003-1488.
NAL Call No.: 41.8 Am3
Descriptors: beef cattle, levels of infection, 380 US herds in 21 states, serum testing for antibodies, ELISA, herd management practices, rather low rate of infection.

Diego, J.V.; Benito, V.F.; Garcia, R.S.  Proyecto Caprino Entre Sierras.  Goat project in the mountains.  Medicina Veterinaria.  2001; 18(4): 382-393.  ISSN:  0212-8292.  Note:  In Spanish with an English summary.
Descriptors:  goats, sheep, mixed and non-mixed herds, 494 serum samples, surveyed for antibodies to Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, high prevalence for both diseases found.

Dimareli, Malli Z.; Sarris, K. Comparison of DNA probe test and cultivation methods for detection of Mycobacterium avium subsp. paratuberculosis in caprine and ovine faeces. Australian Veterinary Journal. January 2001; 79(1): 47-50. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: 3 detection methods compared, DNA probe, double incubation method, conventional culture method, Herrold's medium, goats, sheep, fecal sampling, levels of sensitivity, use in control measures.

Dominguez, M.C.; Chavez, G.; Trigo, F.J.; Rosales, M.L.  Concurrent cholangiocarcinoma, peritonitis, paratuberculosis, and aspergillosis in a goat.  Canadian Veterinary Journal.  2001; 42(11): 884-885.  ISSN:  0008-5286.  Note:  In English with a French summary.
URL:  http://www.pubmedcentral.nih.gov/tocrender.fcgi?action=archive&journal=202
NAL Call No.:  41.8 R3224
Descriptors:  1 goat, case report, diagnosis, concurrent infections, organ sampling, intestines, liver, lungs, neoplasms, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, peritonitis, aspergillosis, Aspergillus fumigatus.

Douart, A.; Maillard, R.  Etiologie et epidemiologie de la paratuberculose bovine.  [Etiology and epidemiology of bovine paratuberculosis.]  Point Veterinaire.  2001; 32(219): 38-42.  ISSN:  0335-4997.  Note:  In French with an English summary.
Descriptors:  cattle, etiology, epidemiology, Mycobacterium avium subsp. paratuberculosis.

Dundee, L.; Grant, I. R.; Ball, H. J.; Rowe, M. T. Comparative evaluation of four decontamination protocols for the isolation of Mycobacterium avium subsp. paratuberculosis from milk. Letters in Applied Microbiology. September 2001; 33(3): 173-177. ISSN: 0266-8254.
NAL Call No.: QR1.L47
Descriptors: spiked milk, 4 chemical decontamination protocols, (1) hexadecylpyridinium chloride (HPC) for 5 h; (2) and (3) Cornell methods employing brain heart infusion broth containing 0.75% (w/v) and 0.9% (w/v) HPC, respectively; and (4) a C18-carboxypropylbetaine (CB-18TM) method, evaluation of effectiveness and suitability.

Dupont, Chris; Murray, Alan. Identification, cloning and expression of sodC from an alkaline phosphatase gene fusion library of Mycobacterium avium subsp. paratuberculosis. Microbios. 2001; 106(Suppl. 1): 7-19. ISSN: 0026-2633.
NAL Call No.: QR1 M54
Descriptors: phoA gene technology, sodC gene, copper and zinc cofactored superoxide dismutase, recombinant protein, enzymatic activity.

Eamens, G.J.; Spence, S.A.; Turner, M.J.  Survival of Mycobacterium avium subsp paratuberculosis in amitraz cattle dip fluid.  Australian Veterinary Journal.  2001; 79(10): 703-706.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  cattle, Mycobacterium paratuberculosis, survival, amitraz dips, disease transmission, New South Wales, Australia.

El Zaatari, Fouad A. K.; Osato, Michael S.; Graham, David Y. Etiology of Crohn's disease: The role of Mycobacterium avium paratuberculosis. Trends in Molecular Medicine. June 2001; 7(6): 247-252. ISSN: 1471-4914.
Descriptors: causal organism, Crohn’s disease, detection of IS900, PCR, situ hybridization in tissues, serologic immune response to Mycobacterium avium subsp. paratuberculosis antigens.

Ellingson, Jay L. E.; Stabel, Judith R. Species-specific genetic identification of Mycobacterium paratuberculosis. Official Gazette of the United States Patent and Trademark Office Patents. [e-file] Aug. 21, 2001; 1249(3): No Pagination. ISSN: 0098-1133.
NAL Call No.: T223.A21
Abstract: An M. paratuberculosis gene referred to as hspX provides a useful target region for the construction of suitable probes and primers that are species-specific for distinguishing M. paratuberculosis from related mycobacteria in a test sample. M. paratuberculosis is the causative agent of Johne's disease and has been isolated from human patients with Crohn's disease.
Descriptors: hspX gene, possible target region for probes and primers, for possible diagnostic method.

Elvander, M.; Lindberg, A.; Christensen, B. [Editors]  Proceedings of the 13th Nordic Committee for Veterinary Scientific Cooperation (NKVet) Symposium on National Disease Control in Farmed Animals, Stockholm, Sweden, 1-2 October 1999.  Acta Veterinaria Scandinavica, Supplementum.  2001; (supp. 94): 102 p.  ISSN:  0065-1699.
NAL Call No.:  41.8 AC87 Suppl
Descriptors:  cattle, mink, fish, pigs, poultry, a variety of topics on animal health and disease, disease recording, effects of industrial infrastructure, species specific surveillance strategies, diseases include Mycobacterium avium subsp. paratuberculosis, rabies, Salmonella, various viral diseases, Iceland, Scandinavia.

Englund, S.; Bolske, G.; Ballagi, Pordany A.; Johansson, K. E. Detection of Mycobacterium avium subsp. paratuberculosis in tissue samples by single, fluorescent and nested PCR based on the IS900 gene. Veterinary Microbiology. August 8, 2001; 81(3): 257-271. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: detection method, comparison of PCR methods, pluses and minuses of methods discussed.

Eppleston, J.; Simpson, G.  The impact of ovine Johne's disease (OJD) in an endemic area.  In:  Proceedings of the 5th International Sheep Veterinary Conference, University of Stellenbosch, South Africa, 21-25 January, 2001.  Bayer AG, Leverkusen, Germany.  2001; unpaginated.
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis mortality, survival, impact on flocks, New South Wales, Australia.

Eppleston, J.; Whittington, R.J.  Isolation of Mycobacterium avium subsp paratuberculosis from the semen of rams with clinical Johne's disease.  Australian Veterinary Journal.  2001; 79 (11): 776-777.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  sheep, rams, Mycobacterium avium subsp. paratuberculosis, isolation, semen, disease transmission.

Fischer, O.; Matlova, L.; Dvorska, L.; Svastova, P.; Bartl, J.; Melicharek, I.; Weston, R. T.; Pavlik, I. Diptera as vectors of mycobacterial infections in cattle and pigs. Medical and Veterinary Entomology. June 2001; 15(2): 208-211. ISSN: 0269-283X.
NAL Call No.: RA639.M44
Descriptors: 7791 adult Diptera, cattle herds and pig herds with mycobacterial infections, Mycobacterium intracellulare, Mycobacterium avium ssp. avium (serotype 8), Mycobacterium avium ssp.avium (serotype 8), Drosophila, Musca, Mycobacterium fortuitum, Mycobacterium scrofulaceum, Mycobacterium phlei, Scatophaga Meigen, Calliphora vicina Robineau-Desvoidy, Lucilia Caesar, Stomoxys calcitrans, infected flies role in spreading disease.

Ghobrial, G.; Naser, S. A. In vitro evaluation of nicotine effect on mycobacterial growth. Abstracts of the General Meeting of the American Society for Microbiology. 2001; 101: 704. ISSN: 1060-2011. Note: 101st General Meeting of the American Society for Microbiology, Orlando, FL, USA, May 20-24, 2001.
NAL Call No.: QR1.A5
Descriptors: alkaloid treatment, various nicotine concentrations, effect on Mycobacterium avium subsp. avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium intracellulare, Mycobacterium smegamtis, and Mycobacterium tuberculosis, strains H37Ra and ATCC 2577, potential therapeutic application.

Goethe, R.; Jeckstadt, S.; Kuehnel, M.; zur Lage, S.; Weiss, S.; Valentin, Welgand P. Modulation of macrophage functions by Mycobacterium avium ssp. paratuberculosis. Biology of the Cell. October 2001; 93(3-4): 211. ISSN: 0248-4900. Note: First Joint French-German Congress on Cell Biology, Strasbourg, France, November 07-09, 2001.
NAL Call No.: QH201.J6
Descriptors: bacterial pathogen behavior, impacts on immune system, white blood cells.

Gous, T.A.; Michel, A.L.  Johne's disease in sheep in South Africa.  In:  Proceedings of the 5th International Sheep Veterinary Conference, University of Stellenbosch, South Africa, 21-25 January, 2001.  Bayer AG.  Leverkusen, Germany.  2001; unpaginated.
Descriptors:  sheep, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, disease prevalence, epidemiology, incidence of disease, South Africa.

Grant, I. R.; O' Riordan, L. M.; Ball, H. J.; Rowe, M. T. Incidence of Mycobacterium paratuberculosis in raw sheep and goats' milk in England, Wales and Northern Ireland. Veterinary Microbiology. March 20, 2001; 79(2): 123-131. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: sheep and goats, milk samples, assay, Johne’s disease status, risks, Mycobacterium avium subsp. paratuberculosis.

Grant, Irene R.; Rowe, Michael T.; Dundee, Louise; Hitchings, Edward. Mycobacterium avium ssp. paratuberculosis: Its incidence, heat resistance and detection in milk and dairy products. International Journal of Dairy Technology. February 2001; 54(1): 2-13. ISSN: 1364-727X.
NAL Call No.: SF221.I58
Descriptors: Johne’s disease, Crohn’s disease, possible food borne disease, contaminated dairy products, pasteurized milk, need for research on milk processing and on farm prevention.

Groenendaal, H.; Nielen, M.; Hesselink, J.W. Development of the Dutch Johne's disease control programme supported by a simulation model. Proceedings of a Meeting, Society for Veterinary Epidemiology and Preventive Medicine. [Great Britain]: The Society, 1983. 2001; 141-152. ISSN: 0956-7496. Note: Meeting held on March 28-30, 2001, Noordwijkerhout, The Netherlands.
NAL Call No.: SF780.9.S63
Descriptors: paratuberculosis, control programs, simulation models, Johne's disease, Mycobacterium avium subsp. paratuberculosis, The Netherlands.

Gwozdz, J. M.; Thompson, K. G.; Manktelow, B. W. Lymphocytic neuritis of the ileum in sheep with naturally acquired and experimental paratuberculosis. Journal of Comparative Pathology. May 2001; 124(4): 317-320. ISSN: 0021-9975.
NAL Call No.: 41.8 J82
Descriptors: sheep, mononucleate inflammatory cells, ileal submucosa, lesions, experimental infection, Mycobacterium avium subsp. paratuberculosis.

Harris, Janet E.; Lammerding, Anna M. Crohn's disease and Mycobacterium avium subsp. paratuberculosis: Current issues. Journal of Food Protection. December 2001; 64(12): 2103-2110. ISSN: 0362-028X.
NAL Call No.: 44.8 J824
Descriptors: human health risks, exposure to contaminated milk, Johne’s disease, etiology of Crohn’s disease, food risk communication.

Harris, N. Beth; Barletta, Raul G. Mycobacterium avium subsp. paratuberculosis in veterinary medicine. Clinical Microbiology Reviews. July 2001; 14(3): 489-512. ISSN: 0893-8512.
NAL Call No.: QR67.C54
Descriptors: bacterial disease, clinical signs, diagnosis, treatment, necropsy.

Hermon-Taylor, J.  Mycobacterium avium subspecies paratuberculosis: the nature of the problem.  Food Control.  2001; 12(6): 331-334.  ISSN: 0956-7135.
NAL Call No.:  TP372.7.F66
Descriptors:  Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, cattle diseases, chronic infections, bacterial diseases, excretion, disease transmission, zoonotic diseases, human diseases, inflammation, intestinal diseases, Crohn's disease, drug resistance.

Hughes, V. M.; Stevenson, K.; Sharp, J. M. Improved preparation of high molecular weight DNA for pulsed-field gel electrophoresis from mycobacteria. Journal of Microbiological Methods. April 2001; 44(3): 209-215. ISSN: 0167-7012.
NAL Call No.: QR65.J68
Descriptors: epidemiology, clonal identity of bacterial, difficulty of getting quality genomic DNA, various species in from stirred cultures tested, standardized method, typing method, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, Mycobacterium malmoense, Mycobacterium phlei strain NCTC-8151 Mycobacterium smegmatis strain NCTC-8159, Mycobacterium terrae strain NCTC-9259, Mycobacterium tuberculosis strain NCTC-14323.

Huntley, J. F. J.; Stabel, J. R.; Bannantine, J. P. Expression library immunization of mice identified five genomic DNA clone pools that are protective against colonization with Mycobacterium avium subsp. paratuberculosis. Abstracts of the General Meeting of the American Society for Microbiology. 2001; 101: 710. ISSN: 1060-2011. Note: 101st General Meeting of the American Society for Microbiology, Orlando, FL, USA, May 20-24, 2001.
NAL Call No.: QR1.A5
Descriptors: Johne's disease, Mycobacterium avium subsp. paratuberculosis, 78 gene pools, PCR, C57BL/6J mice (6 week old, male, 20 grams), immunized, abdominal inoculation, each clone pool via gene gun delivery, live bacteria challenge, effectiveness of vaccinations.

Inglis, Neil F.; Stevenson, Karen; Davies, Richard C.; Heaslip, Darragh G.; Sharp, J. Michael. Unique expression of a highly conserved mycobacterial gene in IS901+ Mycobacterium avium. Microbiology. June 2001; 147(6): 1557-1564. ISSN: 1350-0872.
NAL Call No.: QR1.J64
Nucleotide Sequence: AF247653 GenBank nucleotide sequence.
Descriptors: novel protein antigen, p40 gene, strain differences, nucleotide sequence analysis, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium. bovis, Mycobacterium leprae, Mycobacterium smegmatis, Mycobacterium tuberculosis, putative promoter region, livestock and bird strains.

Johnson, Y. J.; Kaneene, J. B.; Gardiner, J. C.; Lloyd, J. W.; Sprecher, D. J.; Coe, P. H. The effect of subclinical Mycobacterium paratuberculosis infection on milk production in Michigan dairy cows. Journal of Dairy Science. October 2001; 84(10): 2188-2194. ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, subclinical diagnosis, milk, protein, fat production, fecal culture, effect of parity on milk production, Michigan, United States.

Kaba, J.  Epidemiology of caprine arthritis encephalitis, paratuberculosis and caseous lymphadenitis in goats in Poland.  Buletinul Universitatii de Stiinte Agricole si Medicina Veterinara Cluj Napoca, Seria Medicina Veterinara.  2001; 55/56: 236.  ISSN:  1454-2382.
Descriptors:  goats, epidemiological surveys for diseases, caprine arthritis encephalitis virus, Lentivirus, Mycobacterium avium subsp. paratuberculosis, lymphatic diseases, Johne’s diseases, disease transmission, Poland.

Kalis, Cees H. J.; Hesselink, Jan Willem; Barkema, Herman W.; Collins, Michael T. Use of long-term vaccination with a killed vaccine to prevent fecal shedding of Mycobacterium avium subsp. paratuberculosis in dairy herds. American Journal of Veterinary Research. February 2001; 62(2): 270-274. ISSN: 0002-9645.
NAL Call No.: 41.8 Am3A
Descriptors: dairy cows, vaccination of calves with killed vaccine, level of fecal shedding after vaccination, prevention and control method, compared to culture and cull, 58 Dutch dairy herds, lack of efficacy, The Netherlands.

Katayama, Nobuya; Tanaka, Chigusa ; Fujita, Takumi; Suzuki, Takumi; Watanabe, Shigeyuki; Suzuki, Shuka. Effects of silage fermentation and ammonia treatment on activity of Mycobacterium avium subsp. paratuberculosis. Grassland Science. August 2001; 47(3): 296-299. ISSN: 0447-5933. Note: In Japanese with English and Japanese summaries.
NAL Call No.: 60.9 J27
Descriptors: silo moisture and acidity, storage and survivability, moisture, ammonia treated silages, organic acid, high pH, pouched silages, alfalfa hay, grass and forage crops, feed contamination control.

Kennedy, D. J.; Benedictus, G. Control of Mycobacterium avium subsp. paratuberculosis infection in agricultural species. Revue Scientifique et Technique Office International des Epizooties. April 2001; 20(1): 151-179. ISSN: 0253-1933. Note: In English with English, French and Spanish summaries.
NAL Call No.: SF781.R4
Descriptors: livestock, prevention and control programs, surveillance, issues and concerns of designing and implementing a program, costs of programs, epidemiology, diagnostic tools.

Kennedy, D. J.; Allworth, B. Ovine Johne's disease: Progress and challenges. Australian Veterinary Journal. July 2001; 79(7): 482-483. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: sheep, Mycobacterium avium subsp. paratuberculosis, epidemiology, prevention and control concerns.

Kim YongHwan; Al Haddawi, M.H.; Cho HoSeong; Kang SungKwi; Cho KyoungOh; Park HyungSeon; Lee BongJoo; Park NamYong.  Multiplex PCR for differential diagnosis of Mycobacterium species from bovine clinical samples.  Korean Journal of Veterinary Research.  2001; 41(4): 535-542.  ISSN:  1225-0198.  Note:  In Korean with an English summary.
Descriptors:  field cattle, multiplex PCR, detection assay, Mycobacterium bovis, Mycobacterium tuberculosis, Mycobacterium avium, Mybacterium avium subsp. paratuberculosis, blood sample, positive and negative intradermal tuberculin test, may be a rapid, sensitive, and specific tool for differential identification of mycobacterial strains, 1step assay.

Klawonn, W.; Draeger, K.; Guetler, S.; Zimmer, K.; Hess, R. G.; Baumgartner, W. Zur Eignung verschiedener kommerziell erhaeltlicher ELISA-Systeme fuer den Antikoerpernachweis bei Mycobacterium avium subsp. paratuberculosis-ausscheidenden Tieren. [Evaluation of various ELISA kits for the detection of antibodies to Mycobacterium avium subsp. paratuberculosis in cattle. ] Tieraerztliche Umschau. December 1, 2001; 56(12): 648-654. ISSN: 0049-3864. Note: In German.
NAL Call No.: 41.8 T445
Descriptors: cows, fecal secretors, Mycobacterium avium subsp. paratuberculosis, IDEXX/CSL ELISA, HerdCheck ELISA, Svanovir ELISA, ELISA from PourQuier Institute, antibody testing, test sensitivity and reliability, results compared, control programs.

Klijn, N.; Herrewegh, A. A. P. M.; de Jong, P. Heat inactivation data for Mycobacterium avium subsp. paratuberculosis: Implications for interpretation. Journal of Applied Microbiology. October 2001; 91(4): 697-704. ISSN: 1364-5072.
NAL Call No.: QR1 J687
Descriptors: factors for future research, calculated heat inactivation, modeling and inactivation curve of Mycobacterium avium subsp. paratuberculosis, cell clumping, food safety testing.

Koehler, H.; Gyra, H.; Zimmer, K.; Draeger, K. G.; Burkert, B.; Lemser, B.; Hausleithner, D.; Cussler, K.; Klawonn, W.; Hess, R. G. Immune reactions in cattle after immunization with a Mycobacterium paratuberculosis vaccine and implications for the diagnosis of M. paratuberculosis and M. bovis infections. Journal of Veterinary Medicine Series B. April 2001; 48(3): 185-195. ISSN: 0931-1793.
NAL Call No.: 41.8 Z52
Descriptors: calves, experimental immunization, live modified Mycobacterium avium subsp. paratuberculosis vaccine, shedding, tuberculin skin test, diagnostic tests, antibody enzyme linked immunosorbent assay, interferon-gamma test, polymerase chain reaction, interferon-gamma production, check for infection.

Koets, Ad P.; Rutten, Victor P. M. G.; deBoer, Masja; Bakker, Douwe; Valentin, Weigand, Peter; van Eden, Willem. Differential changes in heat shock protein-, lipoarabinomannan-, and purified protein derivative-specific immunoglobulin G1 and G2 isotype responses during bovine Mycobacterium avium subsp. paratuberculosis infection. Infection and Immunity. March 2001; 69(3): 1492-1498. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: cattle, changes from asymptomatic to clinical stage, serological responses, immune responsiveness, IgG1, IgG2, Hsp70, Hsp65.

Le Tallec, B.; Ponsart, C.; Marquant-Leguienne, B.; Guerin, B.  Risks of transmissible diseases in relation to embryo transfer.  Reproduction, Nutrition, Development.  2001; 41(5): 439-450.
NAL Call No.:  QL1.R35
Descriptors:  risks of disease transmission of Mycobacterium avium subsp. paratuberculosis, embryos, transfer of embryos process, sperm ova, preventive measures recommended.

Lee, H.; Stabel, J. R.; Kehrli, M. E. Jr. Cytokine gene expression in ileal tissues of cattle infected with Mycobacterium paratuberculosis. Veterinary Immunology and Immunopathology. September 28, 2001; 82(1-2): 73-85. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
Descriptors: cows, cattle, Mycobacterium avium subsp. paratuberculosis, immune regulation impacts, interleukin-1alpha (IL-1alpha), IL-1beta, IL-6, and interferon-gamma (IFN-gamma), comparison between infected and non-infected animals.

Leitch, E. Carol McWilliam; Duncan, Sylvia H.; Stanley, Karen N.; Stewart, Colin S. Dietary effects on the microbiological safety of food. Proceedings of the Nutrition Society. May 2001; 60(2): 247-255. ISSN: 0029-6651.
NAL Call No.: 389.9 N953
Descriptors: rumen simulating fermentors, studying survival of food borne pathogens, E. coli 0157:H7, Salmonella, Helicobacter pylori, Mycobacterium paratuberculosis, Campylobacter, Listeria.

Lin YuTing; Pan HanEn; Tsai HsiangJung.  Serological survey on the antibodies against paratuberculosis in cows and goats and bluetongue disease in goats in Taiwan.  Chung hua min kuo shou i hsueh hui tsa chih [Journal of the Chinese Society of Veterinary Science.]  2001; 27(4): 256-261.  ISSN:  0253-9179.  Note:  In Chinese with an English summary.
NAL Call No.:  SF604.C54
Descriptors:  dairy cattle testing, goats, serum ELISA kit, AGID, Mycobacterium avium subsp. paratuberculosis, bluetongue virus, antibody testing, Taiwan.

Linnabary, Robert D.  Johne's disease in cattle.  Issue Paper (Council for Agricultural Science and Technology). [2001]; no. 17, 10 p. 
URL:  http://www.cast-science.org
NAL Call No.:  S441.I87 no. 17
Descriptors:  livestock, cattle, Mycobacterium avium subsp. paratuberculosis, issue paper, diagnosis, disease control. 

Liu, X.; Feng, Z.; Harris, N.B.; Cirillo, J.D.; Bercovier, H.; Barletta, R.G. Identification of a secreted superoxide dismutase in Mycobacterium avium subsp. paratuberculosis. FEMS Microbiology Letters. Aug 21, 2001; 202(2): 233-238. ISSN: 0378-1097.
NAL Call No.: QR1.F44
Abstract: Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis), the causative agent of Johne's disease, is an important animal pathogen that has also been implicated in human disease. The major proteins expressed by M. paratuberculosis were analyzed by two-dimensional gel electrophoresis, and a superoxide dismutase (Sod) was identified from this protein profile. The M. paratuberculosis Sod has a molecular mass of 23 kDa and an isoelectric point of 6.1. Sequence analysis of the corresponding sodA gene from M. paratuberculosis indicates that this protein is a manganese-dependent enzyme. We show that the M. paratuberculosis Sod is actively secreted, suggesting that it may elicit a protective cellular immune response in the host during infection.
Descriptors: Mycobacterium avium subsp. paratuberculosis, Johne's disease, zoonoses, protein analysis, superoxide dismutase, host immune response.

Lloyd, J.B.; Whittington, R.J.; Fitzgibbon, C.; Dobson, R.  Presence of Mycobacterium avium subspecies paratuberculosis in suspensions of ovine trichostrongylid larvae produced in faecal cultures artificially contaminated with the bacterium.  Veterinary Record.  2001; 148 (9): 261-263.  ISSN: 0042-4900.
URL:  http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  sheep dung, Mycobacterium avium subsp. paratuberculosis, Haemonchus contortus, Teladorsagia circumcincta, Trichostrongylus colubriformis, nematode larvae, irradiation, viability, cell cultures, microbial contamination.

Mahavir Singh; Siddiqui, M.Z.; Goswami, P.P.  Detection of hybridomas specific for recombinant antigen of Mycobacterium paratuberculosis by ELISA.  Indian Journal of Comparative Microbiology, Immunology and Infectious Diseases.  2001; 22(2): 181-182.  ISSN:  0970-9320.  
Descriptors:  mice, Mycobacterium avium subsp. paratuberculosis, antibodies, B lymphocytes, clones, diagnosis, indirect ELISA to detect intraspecies mice hybridomas for recombinant 35 kDa antigen, immunological techniques, myeloma, recombinant proteins, assay standardization.

Manning, E. J. B.; Collins, M. T. Mycobacterium avium subsp. paratuberculosis: Pathogen, pathogenesis and diagnosis. Revue Scientifique et Technique Office International des Epizooties. April 2001; 20(1): 133-150. ISSN: 0253-1933. Note: In English with English, French, and Spanish summaries.
NAL Call No.: SF781.R4
Descriptors: domestic ruminants, primates, rabbits, stoats, foxes, free ranging and captive wildlife, prevalence in Europe, United States, herd size effects, Australia infections rates, economic effects.

Manning, E.J.B.  Mycobacterium avium subspecies paratuberculosis: a review of current knowledge.  Journal of Zoo and Wildlife Medicine.  2001; 32(3): 293-304.  ISSN:  1042-7260.  Note:  A review article.
URL:  http://www.bioone.org/perlserv/?request=get-document&doi=10.1638%2F1042-7260%282001%29032%5B0293%3AMASPAR%5D2.0.CO%3B2
NAL Call No.:  SF601.J6
Descriptors:  wild animals, animal diseases, susceptibility, characteristics of Mycobacterium avium subsp. paratuberculosis bacteria, virulence, heat tolerance, effects of ultraviolet radiation, photosensitivity, survival, pathogenesis, Johne’s disease transmission, bacterial antigens, immune responses, subclinical and clinical diagnosis, zoonotic diseases.

Marsh, I. B.; Whittington, R. J. Progress towards a rapid polymerase chain reaction diagnostic test for the identification of Mycobacterium avium subsp. paratuberculosis in faeces. Molecular and Cellular Probes. April 2001; 15(2): 105-118. ISSN: 0890-8508.
NAL Call No.: RB43.7.M63
Descriptors: sheep, pooled fecal samples, diagnostic test evaluation, simpler direct PCR technique using primers from the 5' region of IS900, Mycobacterium avium subsp. paratuberculosis, hybridization capture polymerase chain reaction (HC-PCR), level of sensitivity, flock diagnosis for Johne’s.

Martinez-Magana, P.; Camacho-Vallejo, M.E.; Villalba-Montoro, E.; Gomez-Torrico, M.S.; Alferez-Callejon, B.; Gasca-Arroyo, A.  Programa sanitario caprino en el Norte de Cordoba como modelo para eludir la erosion genetica.  [Programme for the caprine health in the North of Cordoba as a model to avoid the genetic erosion.]  Archivos de Zootecnia.  2001; 50(189/190): 269-277.  ISSN:  0004-0592.  Note:  In Spanish with an English summary.  
URL:  http://www.uco.es/organiza/servicios/publica/az/az.htm
Descriptors:  Murciana Granadina goats, implementation of an animal health program made up of 2 subprograms, mastitis control and milk purity, protection from paratuberculosis, pseudotuberculosis and tuberculosis, genetic erosion, Cordoba Province, Spain.

Mason, O.; Marsh, I. B.; Whittington, R. J. Comparison of immunomagnetic bead separation-polymerase chain reaction and faecal culture for the detection of Mycobacterium avium subsp. paratuberculosis in sheep faeces. Australian Veterinary Journal. July 2001; 79(7): 497-500. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: fecal culture, sheep, detection methods, comparison study.

Miao, Z.H.; Glatz, P.C.; English, A.; Ru, Y.J.  Managing fallow deer (Dama dama) and red deer (Cervus elaphus) for animal house research.  ANZCCART News.  2001; 14(4): Insert 1-Insert 8.  ISSN:  1039-9089.  
NAL Call No.:  SF405.5.A3
Descriptors:  farmed deer industry and production, husbandry, venison, deer velvet, housing, nutrition, behavior, rutt, transport, restraint, common diseases, ticks, lice, and helminthic parasites (Dictyocaulus viviparus, Muellerius capillaris and Fasciola hepatica), protozoal diseases, Babesia, bacterial diseases, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, salmonellosis, tuberculosis, clostridiosis, foot and mouth disease, malignant catarrhal fever, current research, Australia.

Miltner, E.; Cirillo, J.; Bermudez, L. E. Identification of Mycobacterium avium genes associated with the ability to invade intestinal epithelial cells. Abstracts of the General Meeting of the American Society for Microbiology. 2001; 101: 708. ISSN: 1060-2011. Note: 101st General Meeting of the American Society for Microbiology, Orlando, FL, USA, May 20-24, 2001.
NAL Call No.: QR1.A5
Descriptors: genes upregulated during binding and invasion of mucosal epithelial cells, L5 phage promoter, clone evaluation for increased expression, ability to invade Hep-2 epithelial cells, infection process.

Morgan, J.  Organic lamb.  Agnote NSW Agriculture.  2001; (DAI-233 (1st Edition)): 1-7.  ISSN:  1034-6848.
Descriptors:  lamb, animal breeding, animal nutrition, bacterial diseases, Clostridia, Mycobacterium avium subsp. paratuberculosis, disease control, farm management, treatment for internal and external parasites, helminthoses, helminthes, liver flukes, mite control, blowfly strike, ovine Johne’s disease, organic farming, certification as organic lamb, record keeping, reviews.

Mukhopadhyay, H.K.; Antony, P.X.; Pillai, R.M.  Prevalence of tuberculosis and Johne's disease in an organized cattle farm at Pondicherry.  Indian Journal of Animal Health.  2001; 40(2): 185-186.  ISSN:  0019-5057.
NAL Call No.:  SF1.I4
Descriptors:  41 cattle, Pondicherry cattle farm, TB and Johne’s disease testing, mammalian tuberculin and Johnin neck inoculation, skin fold thickness variations, disease incidence, Mycobacterium avium subsp. paratuberculosis, Mycobacterium tuberculosis, Pondicherry, India.

Muskens, J.; Bakker, D.; de Boer, J.; van Keulen, L. Paratuberculosis in sheep: Its possible role in the epidemiology of paratuberculosis in cattle. Veterinary Microbiology. January 26, 2001; 78(2): 101-109. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: sheep, diagnosis of flock infection, Mycobacterium avium subsp. paratuberculosis, shared sheep and cattle grazing, biochemistry, serology, and intradermal testing, necropsy results, epidemiology, disease transmission.

Mutwiri, G.K.; Kosecka, U.; Benjamin, M.; Rosendal, S.; Perdue, M.; Butler, D.G.  Mycobacterium avium subspecies paratuberculosis triggers intestinal pathophysiologic changes in beige/scid mice.  Comparative Medicine.  2001; 51(6): 538-544.  ISSN: 1532-0820.
NAL Call No.:  SF77.C65
Abstract:  We investigated whether infection of beige/scid mice with Mycobacterium avium subspecies paratuberculosis can induce intestinal pathophysiologic changes.  Six-week-old beige/scid mice were inoculated intraperitoneally with M. paratuberculosis, then were killed 32 weeks after inoculation when the small intestine was evaluated for physiologic and morphologic abnormalities.  All infected mice developed clinical disease.  The lamina propria of the intestine from infected mice was mildly infiltrated with mononuclear cells containing acid-fast bacteria, and had significantly increased villus width.  In vitro physiologic studies in Using chambers indicated that M. paratuberculosis infection caused significant abnormalities in intestinal transport parameters.  Baseline short circuit current and potential difference were abnormally high in tissues from infected, compared with control mice, indicative of increased ion secretion.  Baseline conductance was significantly decreased in infected mice, suggesting that intestinal tissue from infected mice was less permeable to ions.  The change in short circuit current following transmural electrical and glucose stimulation was significantly reduced in intestines from infected mice, suggesting that inflamed intestine had neural and/or epithelial cell damage.  We conclude that infection of beige/scid mice with M. paratuberculosis triggers significant intestinal pathophysiologic changes consistent with chronic inflammation.  These functional abnormalities may contribute to the pathogenesis of the wasting syndrome seen in bovids with paratuberculosis.  This animal model provides evidence that T cell-independent mechanisms are sufficient to cause mucosal pathophysiologic changes and inflammation in response to a specific pathogen, and may be of relevance to inflammatory bowel disease in humans.
Descriptors:  mice, laboratory mammals, animal model of disease, immunocompromised hosts, experimental infections, Mycobacterium avium paratuberculosis, small intestine, intestinal absorption, inflammation, histopathology, electrical conductance, physiopathology, weight losses.

New South Wales Agriculture.  Ovine Johne's Disease in New South Wales Quarterly Disease Surveillance Report.  2001; (July/September): 7.  NSW Agriculture.  Orange, Australia.
URL:  http://www.agric.nsw.gov.au/
Descriptors:  sheep flocks, seroprevalence, post mortem examination, fecal sampling, seroprevalence, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, disease prevalence, epidemiology, disease control programs, testing, diagnostic techniques, histopathology, New South Wales, Australia.  

Nielsen, S.S.; Houe, H.; Thamsborg, S.M.; Bitsch, V. Comparison of two enzyme-linked immunosorbent assays for serologic diagnosis of paratuberculosis (Johne's disease) in cattle using different subspecies strains of Mycobacterium avium. Journal of Veterinary Diagnostic Investigation. Mar 2001; 13(2): 164-166. ISSN:1040-6387.
NAL Call No.: SF774.J68
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, bacterial antigens, ELISA, immunodiagnosis, antibody testing accuracy.

Norstrom, M.  Geographical Information System (GIS) as a tool in surveillance and monitoring of animal diseases.  In:  Elvander, M.; Lindberg, A.; Christensen, B.  Acta Veterinaria Scandinavica, Supplementum.  2001; (supp. 94): 79-85.  ISSN:  0065-1699.  Note:  In English with a Swedish summary.
NAL Call No.:  41.8 AC87 Suppl.
Descriptors:  cattle, goats, pigs, animal diseases, epidemiology, disease control, disease prevention, geographical information systems, mapping,  monitoring, outbreaks, Johne’s disease,  paratuberculosis, simulation models, bovine respiratory syncytial virus, Mycobacterium avium subsp. paratuberculosis, Mycoplasma hyopneumoniae, Norway.

Odumeru, Joseph; Gao, Anli; Chen, Shu; Raymond, Melinda; Mutharia, Lucy. Use of the bead beater for preparation of Mycobacterium paratuberculosis template DNA in milk. Canadian Journal of Veterinary Research. October, 2001; 65(4): 201-205. ISSN: 0830-9000. Note: In English with a French summary.
NAL Call No.: SF601.C24
Descriptors: Mycobacterium avium subsp. paratuberculosis, detection in milk samples, PCR, lysing bacteria, bead beater, freeze-thaw, InstaGene Matrix, QIAamp Tissue Kit, sensitivity levels.

Olsen, Ingrid; Tryland, Morten; Wiker, Harald G.; Reitan, Liv J. AhpC, AhpD, and a secreted 14-kilodalton antigen from Mycobacterium avium subsp. paratuberculosis distinguish between paratuberculosis and bovine tuberculosis in an enzyme-linked immunosorbent assay. Clinical and Diagnostic Laboratory Immunology. July 2001; 8(4): 797-801. ISSN: 1071-412X.
Descriptors: cattle, sera, natural and experimental infections, antibody testing, ELISA, experimental TB, responses compared, AhpC and AhpD, purified antigens needed to differentiate species of Mycobacterium.

Olsen, Ingrid; Reitan, Liv J.; Wiker, Harald G. Distinct differences in repertoires of low-molecular-mass secreted antigens of Mycobacterium avium complex and Mycobacterium tuberculosis. Journal of Clinical Microbiology. December 2001; 38(12): 4453-4458. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: antigens, culture filtrate, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, Western blot, homologous gene, differential expression.

Olsen, I.; Storset, A. K. Innate IFN-gamma production in cattle in response to MPP14, a secreted protein from Mycobacterium avium subsp. paratuberculosis. Scandinavian Journal of Immunology. September 2001; 54(3): 306-313. ISSN: 0300-9475.
Descriptors: cattle, calves, experimental infection, testing infected and non-infected for interferon (IFN)-gamma production, MPP14, CD8+ cells, CD4+ cells, protein derivative, interference with diagnostic tests.

Paisley, L.G.  Economic aspects of disease monitoring with special reference to bovine paratuberculosis.  In:  Elvander, M.; Lindberg, A.; Christensen, B.  Acta Veterinaria Scandinavica, Supplementum.  2001; (Suppl. 94): 17-25.  ISSN:  0065-1699.  Note:  In English with a Swedish summary.
NAL Call No.:  41.8 AC87 Suppl.
Descriptors:  dairy cattle, 6000 dairy herds, Monte Carlo simulation models, evaluating feasibility and potential results of a national survey for Johne’s disease, Mycobacterium avium subsp. paratuberculosis, classification of true positive and false positive herds, low sensitivity of ELISA, low levels of herd prevalence, low within herd prevalence were analytical problems, national survey would not be feasible, Norway.

Paolicchi, F. A.; Vagnozzi, A; Morsella, C. G.; Verna, A. E.; Massone, A. R.; Portiansky, E. L.; Gimeno, E. J. Paratuberculosis in red deer (Cervus elaphus): An immunohistochemical study. Journal of Veterinary Medicine Series B. May 2001; 48(4): 313-320. ISSN: 0931-1793.
NAL Call No.: 41.8 Z52
Descriptors: deer, Mycobacterium avium subsp. paratuberculosis, methods comparison study, immunohistochemistry, serological results, histological results, tissue samples from intestinge, mesemteric lymph nodes, bacterial isolation, Ziehl-Neelsen stained bacteria, macrophages, Langhans type giant cells.

Parrish, Nikki M.; Houston, Todd; Jones, Paul B.; Townsend, Craig; Dick, James D. In vitro activity of a novel antimycobacterial compound, N-octanesulfonylacetamide, and its effects on lipid and mycolic acid synthesis. Antimicrobial Agents and Chemotherapy. April 2001; 45(4): 1143-1150. ISSN: 0066-4804.
NAL Call No.: RM265.A5132
Descriptors: N-octanesulfonylacetamide (OSA), possible inhibitor of fatty acid and mycolic acid biosynthesis, Mycobacterium, comparative study of species and strains, slow and rapid growing species effects compared, disruption of cell wall synthesis, incomplete septum formation, OSA inhibition in growth in both isoniazid-resistant and multidrug resistant strains of Mycobacterium tuberculosis, Mycobacterium avium, Mycobacterium bovis, Mycobacterium kansasii, Mycobacterium tuberculosis, in vitro activity, mycolic acid.

Pearce, Lindsay E.; Truong, H. Tuan; Crawford, Robert A.; Yates, Gary F.; Cavaignac, Sonia; de Lisle, Geoffrey W. Effect of turbulent-flow pasteurization on survival of Mycobacterium avium subsp. paratuberculosis added to raw milk. Applied and Environmental Microbiology. September 2001; 67(9): 3964-3969. ISSN: 0099-2240.
NAL Call No.: 448.3 Ap5
Descriptors: heat sensitivity, experimentally infected raw milk, ATCC 19698 and ATCC 43015 strains, 3 bovine isolates, contaminated fecal material, treatments of 65,66,69 and 72 degrees C, survival rates.

Petit, E.  Enquete serologique sur la paratuberculose bovine menee dans l'Yonne lors de la campagne 98-99.  [Serological study of bovine paratuberculosis in Yonne in 1998/1999.]  Epidemiologie et Sante Animale.  2001; (40): 23-39.  ISSN:  0754-2186.  Note:  In French with an English summary.  
Descriptors:  155 herds of dairy and lactating cows, cattle, Mycobacterium avium subsp. paratuberculosis, epidemiology, serum testing, sex differences, age differences, breed differences, management, heredity location, prevalence of disease, test reagents, Yonne region, France. 

Pillai, Shreekumar R.; Jayarao, Bhushan M.; Gummo, Jennifer D.; Hue, Eric C. Jr.; Tiwari, Deepanker; Stabel, Judith R.; Whitlock, Robert H. Identification and sub-typing of Mycobacterium avium subsp. paratuberculosis and Mycobacterium avium subsp. avium by randomly amplified polymorphic DNA. Veterinary Microbiology. April 2, 2001; 79(3): 275-284. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: commercial kit, identification and sub-typing, selection of a suitable primer that would permit identification and sub-typing of Mycobacterium avium subsp. paratuberculosis and Mycobacterium avium ssp. avium, primer OPE-20 (5'-AAC-GGT-GAC-C-3'), fingerprint patterns, fragments, cattle, sheep and human isolates, ATCC strains.

Plant, J.W.  Ovine Johne's disease in New South Wales-the present situation.  In:  Proceedings of the 5th International Sheep Veterinary Conference, University of Stellenbosch, South Africa, 21-25 January, 2001.  Bayer AG.  Leverkusen, Germany.  2001; unpaginated.
Descriptors:  sheep, goats, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, disease incidence, serological disease surveys, disease distribution, disease transmission, disease prevention and control programs, diagnostic techniques, cost of disease, regulations, vaccination, vaccines, New South Wales, Australia.

Rajeev Singh; Sinha, D. K.; Hari Shankar; Arora, B.M.; Krishna Lal.  A note on mortality pattern in crossbred cattle at an organised farm.  Indian Journal of Comparative Microbiology, Immunology and Infectious Diseases.  2001; 22(1): 98-99.  ISSN:  0970-9320.
Descriptors:  crossbred cows, calves, mortality data, calf sex differences, calf mortality higher in summer, calf diseases enteritis, pneumonia, malnutrition, cows malnutrition, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, bloat, Trypanosoma evansi, heat stroke, pneumonia, Allahabad, India.

Rajukumar, K.; Tripathi, B. N.; Kurade, N. P.; Parihar, N. S. An enzyme-linked immunosorbent assay using immunoaffinity-purified antigen in the diagnosis of caprine paratuberculosis and its comparison with conventional ELISAs. Veterinary Research Communications. October 2001; 25(7): 539-553. ISSN: 0165-7380.
NAL Call No.: SF601.38
Descriptors: APA ELISA, Mycobacterium avium subsp. paratuberculosis, detection of antibodies in goat sera, fecal cultures, histopathology for disease confirmation, test evaluation.

Rossiter, C. A.; Henning, W. R. Isolation of Mycobacterium paratuberculosis (M. ptb) from thin market cows at slaughter. Journal of Dairy Science. 2001; 84(Suppl. 1): 113-114. ISSN: 0022-0302. Note: Joint Meeting of the American Dairy Science Association, American Meat Science Association, American Society of Animal Science and the Poultry Science Association, Indianapolis, Indiana, USA, July 24-28, 2001.
URL: http://www.ADSA.org/jds
NAL Call No.: SF221 A4
Descriptors: cattle, disease testing, slaughter, incidence of disease, Johne’s disease, Mycobacterium avium subsp. paratuberculosis.

Rowan, Neil J.; MacGregor, Scott J.; Anderson, John G.; Cameron, Douglas; Farish, Owen. Inactivation of Mycobacterium paratuberculosis by pulsed electric fields. Applied and Environmental Microbiology. June 2001; 67(6): 2833-2836. ISSN: 0099-2240.
NAL Call No.: 448.3 Ap5
Descriptors: viability testing, Mycobacterium avium subsp. paratuberculosis cells, peptone water and sterilized cow’s milk, cellular damage.

Ryan, Paul; Bennett, Michael W.; Aarons, Simon; Lee, Gary; O' Connell, Joe; Collins, John K.; O' Sullivan, Gerald C.; Shanahan, Fergus. A search for Mycobacterium paratuberculosis by PCR in Crohn's granulomas isolated laser capture microdissection. Gastroenterology. April 2001; 120(5 Suppl. 1): A.325. ISSN: 0016-5085. Note: 102nd Annual Meeting of the American Gastroenterological Association and Digestive Disease Week, Atlanta, Georgia, USA, May 20-23, 2001.
URL: http://www.gastrojournal.org/
NAL Call No.: RC799.G37
Descriptors: diagnostic method, cattle, humans, Johne’s, Crohn’s disease, Mycobacterium avium subsp. paratuberculosis.

Sasahara, K. C.; Boor, K. Detection of viable Mycobacterium avium subsp. paratuberculosis using luciferase reporter systems. Abstracts of the General Meeting of the American Society for Microbiology. 2001; 101: 576. ISSN: 1060-2011. Note: 101st General Meeting of the American Society for Microbiology, Orlando, FL, USA, May 20-24, 2001.
NAL Call No.: QR1.A5
Descriptors: Mycobacterium avium subsp. paratuberculosis, rapid detection methods, contamination of milk, mycobacterial luciferase reporter system, pathogen survivability.

Schwartz, Brett D.; De Voss, James J. Structure and absolute configuration of mycobactin J. Tetrahedron Letters. May 21, 2001; 42(21): 3653-3655. ISSN: 0040-4039.
NAL Call No.: 385 T29
Descriptors: siderophore, Mycobacterium avium subsp. paratuberculosis, stereochemistry, methods, applications to other mycobactins.

Sechi, Leonardo A.; Manuela, Mura; Francesco, Tanda; Amelia, Lissia; Antonello, Solinas; Giovanni, Fadda; Stefania, Zanetti. Identification of Mycobacterium avium subsp. paratuberculosis in biopsy specimens from patients with Crohn's disease identified by in situ hybridization. Journal of Clinical Microbiology. December 2001; 39(12): 4514-4517. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: Crohn’s disease, cell wall deficient Mycobacterium avium subsp. paratuberculosis, paraffin-embedded tissue specimens, humans.

Secott, T.E.; Lin, T.L.; Wu, C.C. Fibronectin attachment protein homologue mediates fibronectin binding by Mycobacterium avium subsp. paratuberculosis. Infection and Immunity. Apr 2001; 69(4): 2075-2082. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Abstract: Attachment of Mycobacterium avium subsp. paratuberculosis to host tissue and penetration of mucosal surfaces are pivotal events in the pathogenesis of Johne's disease. Fibronectin (FN) binding is required for attachment and internalization of several mycobacteria by epithelial cells in vitro. The objective of this study was to further characterize the FN binding activity of M. avium subsp. paratuberculosis. Although the bacteria bound FN poorly at pH above 7, brief acid pretreatment greatly enhanced FN binding within the pH range (3 to 10) studied. A 4.6-kbp fragment from an M. avium subsp. paratuberculosis genomic library was found to contain a 1,107-bp open reading frame that shows very high nucleotide sequence identity with that of the FN attachment protein (FAP) gene of M. avium subsp. avium. Pretreatment of FN with an FN-binding peptide from M. avium subsp. avium FAP abolished FN binding, indicating that M. avium subsp. paratuberculosis binds FN in a FAP-dependent manner. Pretreatment of M. avium subsp. paratuberculosis with anti-FAP immunoglobulin G did not abrogate FN binding; blocking occurred only when anti-FAP was added together with FN. FAP was detected by immunofluorescence only in lipid-extracted M. avium subsp. paratuberculosis. Western blotting and immunoelectron microscopy revealed that FAP is located near the interior of the cell envelope of M. avium subsp. paratuberculosis. The results indicate that a FAP homologue mediates the attachment of FN to M. avium subsp. paratuberculosis. Further, given the subcellular location of FAP, it is considered that this protein operates at the terminus of a coordinated FN binding system in the cell envelope of M. avium subsp. paratuberculosis.
Descriptors: Mycobacterium avium subsp. paratuberculosis binding proteins, bacterial proteins, nucleotide sequences, genes, molecular sequence data.

Sergeant, E. S. G. Ovine Johne's disease in Australia: The first 20 years. Australian Veterinary Journal. July 2001; 79(7): 484-491. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: sheep, historical review of the disease in Australia, introduction information dates, movement of the disease, economic impact, control, diagnostic techniques, surveillance strategies, distribution and prevalence.

Singh, S.V.; Vihan, V.S.  Diagnosis of Johne's disease.  In:  Chauhan, R.S.; Singh, G.K.; Agrawal, D.K.  Advances in Immunology and Immunopathology Proceedings of a National Symposium on Immunomodulation in Health and Disease.  2001; 140-154.  
Descriptors:  goats, Mycobacterium avium subsp. paratuberculosis, clinical aspects, diagnosis, diagnostic techniques, histology, immunological techniques, PCR.

Spahr, U.; Schafroth, K. Fate of Mycobacterium avium subsp. paratuberculosis in Swiss hard and semihard cheese manufactured from raw milk. Applied and Environmental Microbiology. September 2001; 67(9): 4199-4205. ISSN: 0099-2240.
NAL Call No.: 448.3 Ap5
Descriptors: experimentally contaminated cheese, declumped cells, Swiss Emmentaler, semi-hard Swiss Tisliter, bacterial cell survival, 7H10-PANTA agar plating media, factors affecting ripening were temperature, low pH, and time of 90-120 days.

Stabel, J. R.; Whitlock, R. H. An evaluation of a modified interferon-gamma assay for the detection of paratuberculosis in dairy herds. Veterinary Immunology and Immunopathology. May 10, 2001; 79(1-2): 69-81. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
Descriptors: dairy cattle, blood sampling, Mycobacterium avium subsp. paratuberculosis, Pennsylvania, Wisconsin, infected herds, Johne’s disease, fecal culture, concanavalin A (ConA), IFN gamma, commercial ELISA antibody test, test accuracy, subclinical infection, useful for culling decisions.

Stabel, Judith R.; Harp, James A.; Pesch, Bruce. Infection with Mycobacterium avium subsp. paratuberculosis on immune cell phenotype. FASEB Journal. March 7, 2001; 15(4): A309. ISSN: 0892-6638. Note: Annual Meeting of the Federation of American Societies for Experimental Biology on Experimental Biology 2001, Orlando, Florida, USA, March 31-April 04, 2001.
NAL Call No.: QH301.F3
Descriptors: paratuberculosis, Johne's disease, ruminant bacterial disease, gammadelta-TCR subset of T cells, role in containing the infection, subclinically infected cows, brogation of gammadelta-TCR T cell response may be responsible for the shift between subclinical and clinical disease states for paratuberculosis.

Stabel, Judith; Waldren, Charles; Garry, Frank. Ionizing radiation effectively destroys Mycobacterium paratuberculosis in milk. Journal of Dairy Science. 2001; 84(Suppl. 1): 27. ISSN: 0022-0302. Note: Joint Meeting of the American Dairy Science Association, American Meat Science Association, American Society of Animal Science and the Poultry Science Association, Indianapolis, Indiana, USA, July 24-28, 2001.
URL: http://www.ADSA.org/jds
NAL Call No.: SF221 A4
Descriptors: milk, sterilization with ionizing radiation, Mycobacterium avium subsp. paratuberculosis, public health, disease control.

Stabel, J.R. On-farm batch pasteurization destroys Mycobacterium paratuberculosis in waste milk. Journal of Dairy Science. Feb 2001; 84(2): 524-527. ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Abstract: A recent dairy survey conducted in 1996 by the National Animal Health Monitoring System suggests between 20 and 40% of dairy herds in the United States have some level of Johne's disease. This figure will continue to increase unless producers implement management regimes that will help control the spread of this disease within their herds. The neonatal calf is the target for infection with Mycobacterium paratuberculosis, the causative agent of Johne's disease. Calves become infected via exposure to the bacterium through contaminated feces, bedding, colostrum, and milk. Shedding of viable M. paratuberculosis has been documented in the colostrum and milk of infected dams. This study evaluated the efficacy of on-farm pasteurization to destroy M. paratuberculosis in waste milk fed to calves to circumvent this mode of transmission. In three replicate experiments, waste milk was experimentally inoculated with M. paratuberculosis and heated at 65.5 degrees C for 30 min. No viable bacteria were recovered after 28 wk of incubation. These results suggest that batch pasteurization of waste milk contaminated with M. paratuberculosis was effective at generating a clean product to feed to young calves.
Descriptors: calves, calf feeding, disease survey, pasteurization, efficacy of on-farm pasteurization of waste milk, Mycobacterium avium subsp. paratuberculosis, bacterial count, milk quality, disease control, Johne's disease, United States.

Stabel, J. On-farm batch pasteurization destroys Mycobacterium paratuberculosis in waste milk. Journal of Dairy Science. 2001; 84(Suppl. 1): 187. ISSN: 0022-0302. Note: Joint Meeting of the American Dairy Science Association, American Meat Science Association, American Society of Animal Science and the Poultry Science Association, Indianapolis, Indiana, USA, July 24-28, 2001.
URL: http://www.ADSA.org/jds
NAL Call No.: SF221 A4
Descriptors: Johne’s disease, on the farm disease prevention and control, sanitation, dairy cattle, Mycobacterium avium subsp. paratuberculosis.

Stoltenow, Charles L.; Lardy, Greg; Schroeder, J.W. and NDSU Extension Service.  Johne's disease in beef and dairy herds.  NDSU Extension Service [publication].  [2001];  V-1209, 1 folded sheet (4 p.).  Note:  Caption title has June 2001.
NAL Call No.:  S544.3.N9C46 no. 1209
Descriptors:  paratuberculosis, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, symptoms, control strategies, beef cattle, dairy cattle, North Dakota.

Storset, A. K.; Hasvold, H. J.; Valheim, M.; Brun, Hansen H.; Berntsen, G.; Whist, S. K.; Djonne, B.; Press, C. McL.; Holstad, G.; Larsen, H. J. S. Subclinical paratuberculosis in goats following experimental infection: An immunological and microbiological study. Veterinary Immunology and Immunopathology. August 10, 2001; 80(3-4): 271-287. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
Descriptors: goats, experimental infection of kids, caprine isolate, Mycobacterium avium subsp. paratuberculosis, bacterial suspension in milk replacement, cellular responses monitored, lesions, pathology.

Strommenger, Birgit; Stevenson, Karen; Gerlach, Gerald F. Isolation and diagnostic potential of ISMav2, a novel insertion sequence-like element from Mycobacterium avium subspecies paratuberculosis. FEMS Microbiology Letters. March 1, 2001; 196(1): 31-37. ISSN: 0378-1097.
NAL Call No.: QR1.F44
Descriptors: mycobacterial IS elements, ISMav2, 50% identity to a non-composite transposon of Streptomyces coelicolor at the DNA and protein level, potential diagnostic tool.

Tessema, M. Z.; Koets, A. P.; Rutten, V. P. M. G.; Gruys, E. How does Mycobacterium avium subsp. paratuberculosis resist intracellular degradation? Veterinary Quarterly. November 2001; 23(4): 153-162. ISSN: 0165-2176.
NAL Call No.: SF601 V46
Descriptors: microbial resistance, thick, lipid-rich cell envelope, 3 level survival strategies, safe entry, intracellular trafficking of mycobacteria containing phagosomes, modulation of the immune process, implications, epidemiology, diagnosis, control.

Thomsen, B. V.; Steadham, E. M.; Gallup, J. M.; Ackermann, M. R.; Brees, D. J.; Cheville, N. F. T cell-dependent inducible nitric oxide synthase production and ultrastructural morphology in BALB/c mice infected with Mycobacterium avium subspecies paratuberculosis. Journal of Comparative Pathology. August-October 2001; 125(2-3): 137-144. ISSN: 0021-9975.
NAL Call No.: 41.8 J82
Descriptors: euthymic BALB/c mice, athymic nude BALB/c mice, intraperitoneal injection, Mycobacterium avium subsp. paratuberculosis (ATCC strain 19698), hepatic granuloma evaluation, morphometric analysis of digital images, light microscopy sections, electron microscopy, immunohistochemical methods, responses compared.

Tripathi, B.N.  Recent advances in pathogenesis and diagnosis of paratuberculosis (Johne's disease) in animals.  In: Chauhan R.S.; Singh, G.K.; Agrawal, D.K.  Advances in Immunology and Immunopathology Proceedings of a National Symposium on Immunomodulation in Health and Disease.  2001; 288-294.  
Descriptors:  animal disease, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, bacteriology, pathogenesis, diagnosis, diagnostic techniques, immunodiagnosis, paratuberculosis.

Valsson, O.; Alenius, S.; Nielsen, T.K.; Nyberg, O.; Salmela, P.  Surveillance of ruminant diseases in the Nordic countries.  In:  Elvander, M.; Lindberg, A.; Christensen, B.  [Editors]  Acta Veterinaria Scandinavica, Supplementum.  2001; (supp. 94): 27-28.  ISSN:  0065-1699.
NAL Call No.:  41.8 AC87 suppl
Descriptors:  cattle, sheep, goats, animal health, disease control programs, disease prevention, disease surveillance, bovine leucosis. bovine spongiform encephalopathy, brucellosis, paratuberculosis, salmonellosis, scrapie, tuberculosis, bovine diarrhea virus, bovine herpesvirus 1, caprine arthritis encephalitis virus, Escherichia coli, Mycobacterium avium subsp. paratuberculosis, visna maedi virus, Denmark, Finland, Norway, Sweden, Iceland.

Van Leeuwen, J.A.; Keefe, G.P.; Tremblay, R.; Power, C.; Wichtel, J.J.  Seroprevalence of infection with Mycobacterium avium subspecies paratuberculosis, bovine leukemia virus, and bovine viral diarrhea virus in Maritime Canada dairy cattle.  Canadian Veterinary Journal.  2001; 42(3): 193-198.  ISSN: 0008-5286.  Note:  In English with a French summary.
URL:  http://www.pubmedcentral.nih.gov/tocrender.fcgi?action=archive&journal=202
NAL Call No.:  41.8 R3224
Descriptors:  dairy cows, dairy herds, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, seroprevalence, bovine leukemia virus, bovine diarrhea virus, geographical variation, New Brunswick, Nova Scotia, Prince Edward Island.

Veerabadran, D. Cloning and characterization of the genes coding for antigen 85A, 85B and 85C of Mycobacterium avium subsp. paratuberculosis. Abstracts of the General Meeting of the American Society for Microbiology. 2001; 101: 740. ISSN: 1060-2011. Note: 101st General Meeting of the American Society for Microbiology, Orlando, FL, USA, May 20-24, 2001.
NAL Call No.: QR1.A5
Descriptors: Mycobacterium avium subsp. paratuberculosis, antigen 85-A, B, and C genes, homology with other species.

Vidic, Branka; Grgic, Z.; Bjelajac, B.; Trkulja, R. Ispitivanje rasprostranjenosti paratuberkuloze kod goveda i ovaca. [Investigations of spread of paratuberculosis in cattle and sheep.] Veterinarski Glasnik. 2001; 55(1-2): 9-16. ISSN: 0350-2457. Note: In Serbian with English, Serbian and Russian summaries.
NAL Call No.: 41.8 J93
Descriptors: cattle, sheep, epidemiology, serum sampling, AGID and CBR diagnostic tests, antibody titers, Mycobacterium paratuberculosis, survey, Backa.

Weber, M. F.; Verhoeff, J. Integrale dierziektebestrijding op melkveebedrijven: Visie van rundveedierenartsen op een casus. [Integrated disease control in dairy herds: A case study from the veterinarians' viewpoint.] Tijdschrift voor Diergeneeskunde. Mei 15, 2001; 126(10): 340-345. ISSN: 0040-7453. Note: In Dutch with summaries in English and Dutch.
NAL Call No.: 41.8 T431
Descriptors: control of intestinal diseases, dairy cattle, bovine virus diarrhea virus, bovine herpesvirus-1, Leptospira interrogans serovar hardjo subtype hardjobovis, Mycobacterium avium subsp. paratuberculosis, Salmonella Dublin, sequential ranking for disease control, voluntary culling infected cattle, The Netherlands.

Weiss, Douglas J.; Evanson, Oral A.; McClenahan, David J.; Abrahamsen, Mitchell S.; Walcheck, Bruce K. Regulation of expression of major histocompatibility antigens by bovine macrophages infected with Mycobacterium avium subsp. paratuberculosis or Mycobacterium avium subsp. avium. Infection and Immunity. February 2001; 69(2): 1002-1008. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: cattle, bovine macrophages, histocompatibility complex (MHC) class I and class II antigens on their surface and interaction with primed autologous lymphocytes, changes over 24 and 12 hours, differences in virulence, suppression of mycobacteria antigen presentation to T lymphocytes.

Whan, L. B.; Grant, I. R.; Ball, H. J.; Scott, R.; Rowe, M. T. Bactericidal effect of chlorine on Mycobacterium paratuberculosis in drinking water. Letters in Applied Microbiology. September 2001; 33(3): 227-231. ISSN: 0266-8254.
NAL Call No.: QR1.L47
Descriptors: transmission, contaminated drinking water, effects of standard water treatment processes, strains MAP NCTC 8578, human strain Linda, ATCC 43015, chlorine treatments, effects of level of populations and time of exposure.

Whittington, R. J.; Taragel, C. A.; Ottaway, S.; Marsh, I.; Seaman, J.; Fridriksdottir, V. Molecular epidemiological confirmation and circumstances of occurrence of sheep (S) strains of Mycobacterium avium subsp. paratuberculosis in cases of paratuberculosis in cattle in Australia and sheep and cattle in Iceland. Veterinary Microbiology. April 19, 2001; 79(4): 311-322. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: polymorphism in IS1311, sheep and cattle strains of bacteria, history of strain introductions, effects of different husbandry practices, Australia, Iceland, imported animals, survey of imported animals.

Whittington, R. J.; Sergeant, E. S. G. Progress towards understanding the spread, detection and control of Mycobacterium avium subsp. paratuberculosis in animal populations. Australian Veterinary Journal. April 2001; 79(4): 267-278. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: pathogenesis, epidemiology, information review, aspects of the disease, infection, transmission, incubation period, detection.

Whittington, R.J.; Lloyd, J.B.; Reddacliff, L.A. Recovery of Mycobacterium avium subsp. paratuberculosis from nematode larvae cultured from the faeces of sheep with Johne's disease. Veterinary Microbiology. Aug 8, 2001; 81(3): 273-279. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Abstract: A study was conducted to determine whether trichostrongylid nematode larvae become contaminated with Mycobacterium avium subsp. paratuberculosis when they develop in the faeces of sheep with Johne's disease. Nematode larvae were hatched from ova in the faecal samples of affected sheep. Larval sheaths were removed and these as well as exsheathed larvae were subjected to radiometric culture for M. paratuberculosis. The organism was recovered from washing water used to prepare the larvae, third stage larvae and larval sheaths, but not from exsheathed larvae. The recovery of M. paratuberculosis from larvae was associated with the severity of the histological lesions in affected sheep and with the results of culture of the organism from intestinal tissues and faeces. Nematode parasites of sheep might be able to act as mechanical vectors for M. paratuberculosis as the organism associates with infective third stage larvae when these develop in the faeces of sheep with Johne's disease.
Descriptors: sheep, Johne's disease, Mycobacterium avium subsp. paratuberculosis, nematode larvae, intestinal tissue and feces, Trichostrongylidae, contamination, ova, histology, disease vectors, infectivity.

Worthington, R.W.; Bigalke, R.D.  A review of the infectious diseases of African wild ruminants.  Onderstepoort Journal of Veterinary Research.  2001; 68(4): 291-323.  ISSN:  0030-2465.
NAL Call No.:  41.8 ON1
Descriptors:  wild ruminants, many infectious diseases, epidemiology, clinical aspects, disease transmission, many bacterial, viral, and parasitic diseases reviewed including Mycobacterium avium subsp. paratuberculosis and Mycobacterium bovis.

Zhang XiYue; Gao YunHang; He ZhaoYang.  Comparison study of several agar diffusion antigen of bovine paratuberculosis.  Chi lin nung yeh ta hsüeh hsüeh pao. [Journal of Jilin Agricultural University.]  2001; 23(1): 88-90.  ISSN:  1000-5684.  Note:  In Chinese with an English summary.
NAL Call No.:  S19.C55
Descriptors: Mycobacterium avium subsp. paratuberculosis, antigen prepared from cytoplasm, cell wall, Sephadex G200 and through Mycobacterium phlei absorption methods, diagnostic methods.


Return to Contents

2000

Allworth, M.B.; Kennedy, D.J. Progress in national control and assurance programs for ovine Johne's disease in Australia. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 415-422. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Since the detection of ovine Johne's disease in Australia in 1980, 578 flocks have been diagnosed as infected, with 442 of these still infected. The disease was initially believed to be confined to the central tablelands area of NSW, but has subsequently been shown to be more widely distributed. Sheep strains of M. paratuberculosis are known to infect sheep and goats in south-eastern Australia. Although sheep strains have recently been identified in some cattle in Australia, epidemiological evidence to date supports the distinction between ovine Johne's disease, caused by sheep strains in sheep and goats, and bovine Johne's disease, caused by cattle strains in cattle, goats and alpaca, as a basis for control and eradication strategies. Four national initiatives to control and better understand OJD are outlined. The Australian Johne's Disease Market Assurance Program for sheep was launched in May 1997. By December 1998, 548 flocks had achieved an assessed negative status. Three flocks assigned a flock status have subsequently been found to be infected. National standards for State control of Johne's disease through zoning, movement controls and procedures in infected and suspect flocks have also been developed. In addition, a $40.1 m National Ovine Johne's Disease Control and Evaluation Program was agreed to in August 1998, and is currently being implemented. It is jointly funded by National and State industries, and Commonwealth and State governments. Its objectives are to deliver, through research and surveillance, a solid basis for a future decision on the most appropriate course for dealing with OJD and to maintain control of OJD nationally.
Descriptors: sheep, Mycobacterium avium subsp. paratuberculosis, Johne's disease control, detection, flock health, disease strains, geographical distribution, epidemiology, goats, cattle, disease prevalence, surveillance, Australia.

Bakker, D.; Willemsen, P. T. J.; van Zijderveld, F. G. Paratuberculosis recognized as a problem at last: A review. Veterinary Quarterly. October 2000; 22(4): 200-204. ISSN: 0165-2176.
NAL Call No.: SF601 V46
Descriptors: current opinions, Johne's disease, Mycobacterium avium subsp. paratuberculosis, incidence of disease, cattle and sheep, role in etiology of Crohn's, issue of diagnostic tools, current status, control programs.

Bannantine, John P.; Stabel, Judith R. HspX is present within Mycobacterium paratuberculosis-infected macrophages and is recognized by sera from some infected cattle. Veterinary Microbiology. October 20, 2000; 76(4): 343-358. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: cattle, rabbit antisera against recombinant protein of HspX fused to the Escherichia coli maltose binding protein (MBP/HspX), infected murine and bovine macrophages, sera testing, Mycobacterium avium subsp. paratuberculosis.

Bannantine, J. P.; Stabel, J. R. Identification of two M. paratuberculosis gene products differentially recognized by sera from rabbits immunized with live mycobacteria but not sera raised against heat-killed mycobacteria. Abstracts of the General Meeting of the American Society for Microbiology. 2000; 100: 648. ISSN: 1060-2011. Note: 100th General Meeting of the American Society for Microbiology, Los Angeles, California, USA, May 21-25, 2000.
NAL Call No.: QR1.A5
Descriptors: bacterial molecular genetics, gene products, heat killed and live bacteria, rabbits, Corynebacterium glutamicum protein, Mycobacterium avium subsp. paratuberculosis, genomic expression library of bacterial induced proteins, paratuberculosis antigens, polyketide synthase.

Beard, P.M.; Rhind, S.M.; Sinclair, M.C.; Wildblood, L.A.; Stevenson, K.; Mckendrick, I.J.; Sharp, J.M.; Jones, D.G. Modulation of gammadelta T cells and CD1 in Mycobacterium avium subsp. paratuberculosis infection. Veterinary Immunology and Immunopathology. Dec 29, 2000; 77(3/4): 311-319. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
Abstract: M.a. paratuberculosis is the causal agent of paratuberculosis (Johne's disease). Recent work has suggested that gammadelta T cells may play an important role in the early immunological response to mycobacterial diseases, and that CD1 may act as a non-classical MHC molecule in antigen presentation to these gammadelta T cells. Experimental infection of neonatal lambs with M.a. paratuberculosis was used to investigate the changes in gammadelta T cells and CD1 molecules in the gut associated lymphoid tissue 4 weeks after inoculation. Immunohistochemistry was used to label the gammadelta lymphocytes and CD1 molecules. An increase in the number of gammadelta T cells was noted in both the jejunal and ileal Peyer's patches in the gut of infected lambs, but no statistically significant change was found in the mesenteric lymph nodes. There were no obvious changes in the CD1 molecules in any tissue. This work suggests that gammadelta T cells may play a role in the initial immunological events of paratuberculosis infection.
Descriptors: Mycobacterium avium subsp. paratuberculosis, gammadelta T lymphocytes, CD1 molecules, lambs, experimental infections, jejunum, ileum, Peyer patches, lymph nodes.

Beard, P. M.; Henderson, D.; Daniels, M.; Pirie, A.; Buxton, D.; Greig, A.; Hutchings, M. R.; McKendrick, I.; Rhind, S.; Stevenson, K.; Sharp, J. M. Wildlife reservoirs of paratuberculosis. Research in Veterinary Science. June 2000; 68(Suppl. A): 2. ISSN: 0034-5288. Note: 54th Annual Conference of the Association of Veterinary Teachers and Research Workers on Current Topics in Veterinary Science, Scarborough, England, April 17-19, 2000.
NAL Call No.: 41.8 R312
Descriptors: Mycobacterium avium subsp. paratuberculosis, pathogen vectors, ruminants, Johne’s disease.

Benedictus, G.; Verhoeff, J.; Schukken, Y.H.; Hesselink, J.W. Dutch paratuberculosis programme history, principles and development. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 399-413. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Organised disease control started in the Netherlands in the 18th century with governmental attempts to eradicate cattle plague. At the beginning of the 20th century, the dairy industry and cattle breeding organisations initiated a programme to control infectious diseases by means of a complex system of rewards and penalties. This was also the reason for establishing the Animal Health Service in Friesland in 1919. The history of programmes to control paratuberculosis in sheep, goats, and cattle in various countries is described. The vaccination of young animals seems to be an effective measure in the prevention of clinical paratuberculosis, although changes in management and hygiene practices are also important. A control programme for infectious cattle diseases has a number of phases (a lifecycle) and different components. Two components are essential for success, namely: open and regular communication with farmers, veterinary practitioners, and other people involved and a good registration and identification system for cattle, herds, and veterinary practitioners. The Dutch paratuberculosis programme has 10 herd status levels: 5-10 for non-suspect herds and 1-4 for infected herds or herds of unknown status. The higher the status, the greater the chance that a herd is free of paratuberculosis. An outline is given of the Dutch paratuberculosis programme including its objectives, basis principles for eradication, communication plan, legal action, logistic considerations, and complementary research programme.
Descriptors: dairy cattle, Mycobacterium avium subsp. paratuberculosis, history, disease control, government policy, vaccination, disease prevention, hygiene, animal husbandry, life cycle, infections, The Netherlands.

Bergeron, N.; Pare, J.; Fecteau, G. Le diagnostic de la paratuberculose chez les bovins. [Diagnosis of bovine paratuberculosis.] Medecin Veterinaire du Quebec. 2000; 30(4): 215-219. ISSN: 0225-9591. Note: In French with English and French summaries.
NAL Call No.: SF602.M8
Descriptors: Johne’s, brief review of the disease in cattle, diagnostic methods, Mycobacterium avium subsp. paratuberculosis.

Boelaert, F.; Walravens, K.; Biront, P.; Vermeersch, J.P.; Berkvens, D.; Godfroid, J. Prevalence of paratuberculosis (Johne's disease) in the Belgian cattle population. Veterinary Microbiology. Dec 20, 2000: 77(3/4): 269-281. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: The national bovine paratuberculosis (PTB) seroprevalence (apparent prevalence) in the Belgian cattle population was determined by a serological survey that was conducted from December 1997 to March 1998. In a random sample of herds (N = 556, 9.5%), all adult cattle of 24 months of age or older (N = 13,317, 0.4%) were tested for the presence of antibodies using a commercially available absorbed ELISA test kit. The PTB median within-herd seroprevalence (proportion of detected animals within the seropositive herds) and the PTB individual-animal seroprevalence (proportion of detected animals) were, respectively, 2.9% (quartiles = 1.6-5.6) and 0.87% (95% confidence interval (CI) = 0.71-1.03). The PTB herd seroprevalence (proportion of detected herds) was 18% (95% CI = 14-21). Assuming a test sensitivity and specificity of 45 and 99% [Sweeney et al., 1995. Journal of Veterinary Diagnostic Investigation, 7(4): 488; Sockett et al., 1992. Journal of Clinical Microbiology, 30(5): 1134], respectively, the median true within-herd prevalence and the true individual-animal were estimated to be 7 and 2%, respectively. The true herd prevalence of Mycobacterium paratuberculosis infection was first estimated according to currently accepted methodology. This calculation revealed that the specificity of the used test has a dramatic effect on the estimation; assuming a test sensitivity of 45% and a true within-herd prevalence of 7%, the true herd prevalence estimation decreased from 36 to 0.8% if the test specificity decreased from 99.9 to 99%, respectively. This sensitivity analysis showed that the practical limits of the accuracy of the used screening test jeopardize the estimation of the true herd prevalence within reasonable confidence limits, because the within-herd PTB true prevalence was low. For this reason we augmented the herd specificity for herds with larger adult herd size (>5). This was done by increasing the cut-off number of positive cattle required (greater than or equal to 2) to classify a herd truly positive and including herds with one positive test result if there was historical evidence of PTB (previous diagnosis and/or clinical signs). This approach resulted in an estimated true herd prevalence of M. paratuberculosis infection of 6%. The true herd prevalence for dairy, mixed and beef herds was, respectively, 10, 11 and 3%.
Descriptors: cattle, paratuberculosis, disease prevalence, Mycobacterium avium subsp. paratuberculosis, seroprevalence, serological surveys, herd health status, estimation, screening, livestock numbers, statistical analysis, Belgium.

Brumbaugh, G. W.; Edwards, J. F.; Roussel, A. J. Jr.; Thomson, T. D. Effect of monensin sodium on histological lesions of naturally occurring bovine paratuberculosis. Journal of Comparative Pathology. July 2000; 123(1): 22-28. ISSN: 0021-9975.
NAL Call No.: 41.8 J82
Descriptors: cattle, efficacy of drug treatment, drug delivery in feed, pre- and post-lesion severity, 147.5 mg/kg, and each treated cow received 450 mg of monensin daily for 120 days, post mortem examination, positive effects on ileum, liver, rectal mucosa, no effect seen on mesenteric lymph node.

Buergelt, C.D.; Ginn, P.E. The histopathologic diagnosis of subclinical Johne's disease in North American Bison (Bison bison). Veterinary Microbiology. Dec 20, 2000; 77(3/4): 325-331. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: The morphologic changes of subclinical Johne's disease in North American Bison (Bison bison) are characterized by microgranulomas composed of epithelioid macrophages and individual multinucleate giant cells of Langhans'-type occasionally containing individual cytoplasmic acid-fast bacilli compatible with Mycobacterium avium paratuberculosis. The microgranulomas are best visualized in the mesenteric lymph nodes of infected subclinical animals. Macrophages that can be confused with infection-associated epithelioid macrophages in the mesenteric lymph nodes are pigment-carrying cells from the intestinal tract. Mesenteric lymph node biopsy may be a useful diagnostic tool for detection of mild subclinical infection in individual ruminants from herds of unknown infection status. The biopsy may also be useful for Johne's disease surveillance during test-and-cull programs.
Descriptors: Bison bison, Mycobacterium avium subsp. paratuberculosis, histopathology, diagnosis, cytoplasm, giant cells, macrophages, lymph nodes, clinical aspects, biopsy, diagnostic techniques, test and cull programs, North America.

Bull, Tim J.; Hermon, Taylor John; Pavlik, Ivo; El Zaatari, Fouad; Tizard, Mark. Characterization of IS900 loci in Mycobacterium avium subsp. paratuberculosis and development of multiplex PCR typing. Microbiology. September 2000; 146(9): 2185-2197. ISSN: 1350-0872.
NAL Call No.: QR1.J64
Descriptors: genomic DNA flanking IS900 insertions characterized, homologues identified, Mycobacterium tuberculosis and Mycobacterium avium subsp. paratuberculosis genomes, sigma factor (sigJ) at locus 3, a nitrate reductase (nirA) at locus 4, a transcription regulator (tetR) and polyketide synthase at locus 6, and a 6-O-methylguanine methyltransferase at locus 9, DesA1 protein, isolates comparison, possible technique for identification.
Nucleotide Sequence Information: AJ011838 GenBank nucleotide sequence, AJ250015 GenBank nucleotide sequence, AJ250016 GenBank nucleotide sequence, AJ250017 GenBank nucleotide sequence, AJ250018 GenBank nucleotide sequence, AJ250019 GenBank nucleotide sequence, AJ250020 GenBank nucleotide sequence, AJ250021 GenBank-, nucleotide sequence, AJ250022 GenBank nucleotide sequence, AJ250023 GenBank nucleotide sequence, AJ251434 GenBank nucleotide sequence, AJ251435 GenBank nucleotide sequence, AJ251436 GenBank nucleotide sequence, AJ251437 GenBank nucleotide sequence.

Bull, T.J.; Sheridan, J.M.; Martin, H.; Sumar, N.; Tizard, M.; Hermon-Taylor, J. Further studies on the GS element a novel mycobacterial insertion sequence (IS1612), inserted into an acetylase gene (mpa) in Mycobacterium avium subsp. silvaticum but not in Mycobacterium avium subsp. paratuberculosis. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 453-463. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: We have recently described the GS element, found in Mycobacterium avium subsp. paratuberculosis (MAP), Mycobacterium avium subsp. silvaticum (MAS) and some isolates of Mycobacterium avium subsp. avium serotype 2 (MAAs2), which contains a set of genes of low GC% content, putatively associated with the biosynthesis, modification and transference of fucose to cell wall glycopeptidolipids. Here we describe a further gene of low GC% content (mpa), within the GS element in MAP. mpa is a putative acetyltransferase with homology to genes directly responsible for host specificity and virulence in Salmonella typhimurium and Shigella flexneri. Unlike other GS genes, strong homologues of mpa have not been found in related species, including Mycobacterium tuberculosis (MTB). In MAP, mpa encodes an ORF of 445aa, however, in MAS and MAAs2 mpa contains a single inserted copy of a novel insertion sequence. This element (IS1612) has two sets of inverted repeats at each terminus and encodes two ORFs with good homologies to transposase and helper proteins of IS21 (E. coli) and IS1415 (R. erythropolis). Sequence comparisons between mpa in MAP and MAS indicate the target site for IS1612 is duplicated on insertion to give a direct repeat at each end of the element. Immediately, downstream of the mpa gene in both MAP and MAS are a group of three genes with good homology to the daunorubicin resistance cluster. This cluster has a high GC% content which suggests a 'border' for the GS element. A short motif present at the beginning of this cluster matches with an inverted repeat of this motif at the beginning of the first gene in the GS element. This encapsulates the whole of this group of low GC% genes in MAP and further suggests its cassette-like nature. Homologues of the GS element in MTB show a marked similarity of organisation, suggesting a parallel role for these genes in both pathogens.
Descriptors: Mycobacterium avium subsp. paratuberculosis serotype 2, Mycobacterium avium subsp. silvaticum, nucleotide sequences, genes, transposable elements, serotypes, cell wall components, fucose, host range, virulence, molecular sequence data.

Cann, Paul Adrian; Bramble, Michael Graham. An open pilot study of antimicrobial agents in the management of resistant Crohn's Disease. Gastroenterology. April 2000; 118(4, Suppl. 2, Pt. 2): AGA A1335. ISSN: 0016-5085. Note: 101st Annual Meeting of the American Gastroenterological Association and the Digestive Disease Week, San Diego, California, USA, May 21-24, 2000.
NAL Call No.: RC799.G37
Descriptors: Mycobacterium avium subsp. paratuberculosis, humans, antibiotic drug treatment, clarithromycin, clofazamine, rifabutin, Crohn’s disease.

Cavaignac, Sonia M.; White, Stefan J.; de Lisle, Geoffrey W.; Collins, Desmond M. Construction and screening of Mycobacterium paratuberculosis insertional mutant libraries. Archives of Microbiology. March 2000; 173(3): 229-231. ISSN: 0302-8933.
NAL Call No.: 442.8 AR26
Descriptors: Johne's disease, virulence mechanisms, libraries of random mutants produced in two Mycobacterium paratuberculosis strains, conditionally replicating shuttle phasmid phAE94 with transposon Tn5367, 2000 mutants screened, auxotrophy, carbon source preference, altered cell wall, interrupted genes.

Cerf, O.; Griffiths, M. W.; Grant, I. Mycobacterium paratuberculosis heat resistance and reply. Letters in Applied Microbiology. April 2000; 30(4): 341-344. ISSN: 0266-8254.
NAL Call No.: QR1.L47
Descriptors: letter regarding previously published information, heat resistance of pathogen, bacterial characteristics, Mycobacterium avium subsp. paratuberculosis.

Coetsier, Christophe; Vannuffel, Pascal; Blondeel, Nathalie; Denef, Jean Francois; Cocito, Carlo; Gala, Jean Luc. Duplex PCR for differential identification of Mycobacterium bovis, M. avium, and Mycobacterium avium subsp. paratuberculosis in formalin-fixed paraffin-embedded tissues from cattle. Journal of Clinical Microbiology. August 2000; 38(8): 3048-3054. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: DNA based assay, cattle tissues, assessment of molecular assay, conventional bacteriological and histological test, Ziehl-Neelsen staining, p34 and f57 sequence amplification for differential diagnosis of tuberculosis, duplex paratuberculosis, or infections caused by other members of the Mycobacterium avium complex.

Corpa, J. M.; Garrido, J.; Marin, J. F. Garcia.; Perez, V. Classification of lesions observed in natural cases of paratuberculosis in goats. Journal of Comparative Pathology. May 2000; 122(4): 255-265. ISSN: 0021-9975.
NAL Call No.: 41.8 J82
Descriptors: 68 goats, clinical or sub-clinical Mycobacterium avium subsp. paratuberculosis, post mortem pathological examination, intestinal lymphoid tissue, granulomata in the ileocaecal Peyer's patches or related lamina propria, diffuse multibacillary lesions, granulomatous enteritis of different intestinal sites, macroscopical changes in the normal gut morphology, changes in lymphocyes and macrophages.

Corpa, J.M.; Perez, V.; Sanchez, M.A.; Garcia-Marin, J.F.  Control of paratuberculosis (Johne's disease) in goats by vaccination of adult animals.  Veterinary Record.  2000; 146(7): 195-196.  ISSN: 0042-4900.
URL:  http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  goats, age groups, vaccination, disease control, paratuberculosis, Mycobacterium avium subsp. paratuberculosis.

Corpa, J.M.; Perez, V.; Garcia-Marin, J.F. Differences in the immune responses in lambs and kids vaccinated against paratuberculosis, according to the age of vaccination. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 475-485. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: In order to evaluate and compare the peripheral immune responses induced by the vaccination against paratuberculosis in relation with the age of immunization, two groups of lambs and goat kids were vaccinated at 15 days and 5 months old, respectively. A heat-killed commercial vaccine was inoculated subcutaneously and humoral and cellular immune responses were measured by an ELISA and IFN-gamma assay, respectively, at 0, 30, 90, 180, 270 and 360 dpv in the lambs and 0, 30, 90 and 180 dpv in the caprine. IFN-gamma values did not show statistically significant differences between both groups, but when compared to the unvaccinated controls, this cytokine response tend to disappear earlier in animals vaccinated at 15 days old. The antibody response was always higher and more persistent in animals vaccinated at 5 months. The possibility of the incomplete degree of maturation of the immune system in 15 days old animals as the cause of the differences in the immune response to vaccination is suggested.
Descriptors: lambs, goat kids, Mycobacterium avium subsp. paratuberculosis, vaccination, age differences, species differences, evaluation, vaccines, interferon, ELISA, cytokines, antibodies.

Cousins, D. V.; Williams, S. N.; Hope, A.; Eamens, G. J. DNA fingerprinting of Australian isolates of Mycobacterium avium subsp. paratuberculosis using IS900 RFLP. Australian Veterinary Journal. March 2000; 78(3): 184-190. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: cattle, sheep, alpacas, a rhinoceros, evaluate additional restriction enzymes, IS900 RFLP, examine the genetic diversity, 71 Australian isolates, epidemiology, Johne's disease, restrictions enzymes, Bst EII, Pvu II and Pst I, Bam Hl, Alu I, Xho I and Dra I, detection of polymorphisms, cattle and sheep strains distribution, Australia.

Cousins, D. V.; Whittington, R.; Marsh, I.; Masters, A.; Evans, R. J.; Kluver, P. Mycobacteria distinct from Mycobacterium avium subsp. paratuberculosis isolated from the faeces of ruminants possess IS900-like sequences detectable by IS900 polymerase chain reaction: Implications for diagnosis. Molecular and Cellular Probes. Dec. 2000; 13(6): 431-442. ISSN: 0890-8508.
NAL Call No.: RB43.7.M63
Descriptors: feces, diagnosis of Johne’s disease, IS900 PCR, 16 S rRNA, recommend the adoption of restriction endonuclease analysis of IS900 PCR product false positives.

Daniels, M. J.; Hutchings, M. R.; Henderson, D. Quantifying rabbit faecal contamination on livestock grazing pasture and the input of M. a. paratuberculosis. Research in Veterinary Science. June 2000; 68(Suppl. A): 2. ISSN: 0034-5288. Note: 54th Annual Conference of the Association of Veterinary Teachers and Research Workers on Current Topics in Veterinary Science, Scarborough, England, April 17-19, 2000.
NAL Call No.: 41.8 R312
Descriptors: fecal contamination, pastures, Mycobacterium avium subsp. paratuberculosis, rabbit pellets, Oryctolagus cuniculus, possible disease, vector, Scotland.

Dimech, W. Automation of an absorbed enzyme immunoassay for the detection of Mycobacterium paratuberculosis antibodies for an eradication program. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 351-355. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: As part of an ongoing Johne's disease eradication program by the state of Victoria, Australia, the Victorian Veterinary Pathology Services (VVPS) has been involved in testing over 150000 cattle samples per year for the presence of Johne's-specific antibodies. The Parachek kit (CSL, Victoria, Australia) has been used throughout the project. This method was automated using a Rosys 3300 and a Plato 7 (Dade/Behring Diagnostics) to pipette samples and the Behring ELISA Processor 3 (Dade/Behring Diagnostics) to wash EIA plates, add reagents, reads absorbances and perform data reduction of the results. Automation saved about 15 h of labour per day, allowing one staff member to analyse up to 2000 samples per 8 h shift compared to 800 samples using a manual protocol. Problems that were encountered include pipetting issues, the reading of the Paracheck endpoint, and excessive packaging of the kit. Maintenance, calibration and control of the analysers were an integral part of the process. VVPS, working in conjunction with CSL, suggested modification to the Parachek kit to make automation of the product more convenient. The approach resulted in a change in reagent volume and a reduction in packaging that reduced the cost of the test by 25%.
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, enzyme immunoassay, antibody testing, disease control, automation, labor, evaluation, calibration, maintenance, Victoria, Australia.

Dinsmore, R. Page. Updates on Johne's Disease. Large Animal Practice. March-April 2000; 21(2): 20, 24-25. ISSN: 1092-7603.
NAL Call No.: SF601 B6
Descriptors: Mycobacterium avium subsp. paratuberculosis, pathogenicity, etiology, paratuberculosis, cattle disease, Crohn’s disease in humans, status of diagnosis and control, disease prevalence, milkborne diseases, dairy cows, beef cattle.

Eamens, G.J.; Whittington, R.J.; Marsh, I.B.; Turner, M.J.; Saunders, V.; Kemsley, P.D.; Rayward, D. Comparative sensitivity of various faecal culture methods and ELISA in dairy cattle herds with endemic Johne's disease. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 357-367. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: In three New South Wales dairy cattle herds with endemic Johne's disease, prevalence rates by faecal culture were determined to be 12, 18 and 22%, respectively. Whole herd faecal culture was shown to detect markedly more infected cattle than whole herd testing by the EMAI absorbed ELISA, particularly in the two herds with greatest prevalence. In the three study herds, five methods for whole herd faecal culture were compared in each. These included two methods based on primary culture on Herrold's egg yolk medium with mycobactin J (HEYM): (1) conventional decontamination with sedimentation and primary culture on HEYM; (2) Whitlock decontamination and culture on HEYM. The remaining three methods were based on radiometric (BACTEC) culture: (3) decontamination and filtration to BACTEC medium; (4) modified Whitlock decontamination to BACTEC medium and (5) Whitlock decontamination to BACTEC medium. For BACTEC cultures, two methods were compared as confirmatory tests for Mycobacterium paratuberculosis: mycobactin dependence on conventional subculture to HEYM and IS900 PCR analysis of radiometric media. Among 179 cattle tested simultaneously by all five culture methods, 38 cattle were confirmed to be shedding M. paratuberculosis. In identifying shedder cattle, method 5 was the most sensitive, followed by methods 2, 4, 1, and 3 was the least sensitive. The number of BACTEC cultures confirmed by mycobactin dependence or PCR was similar.
Descriptors: dairy cattle herds, endemic Johne's disease, paratuberculosis, fecal cell cultures, ELISA, diagnostic techniques, evaluation, disease prevalence, infections organism shedding, detection methods, New South Wales, Mycobacterium avium subsp. paratuberculosis, Australia

Ellingson, J. L. E.; Stabel, J. R.; Bishai, W. R.; Frothingham, R.; Miller, J. M. Evaluation of the accuracy and reproducibility of a practical PCR panel assay for rapid detection and differentiation of Mycobacterium avium subspecies. Molecular and Cellular Probes. June 2000; 14(3): 153-161. ISSN: 0890-8508.
NAL Call No.: RB43.7.M63
Descriptors: possible diagnostic tool, specific oligonucleotides primers, 16 S rRNA (MAs) sequence, insertion elements IS901 (MAs avium), IS 1245 Mycobacterium avium complex (MAC), IS900 (MAs paratuberculosis), and the hspX (MAs paratuberculosis) gene sequences were synthesized and used in preassembled PCR reaction mixtures, easy to use method.

Eppleston, J.; Simpson, G.; O'Neill, S.; Thornberry, K.; Lugton, I.; Taylor, P.; Hall, D.G. Reported levels of sheep mortalities in flocks infected with ovine Johne's disease in New South Wales. Asian-Australasian Journal of Animal Science. July 2000; 13(suppl.): 247. ISSN: 1011-2367. Note: In the supplement: Animal Production for a Consuming World, vol. C edited by G.M. Stone. Proceedings of the 9th Congress of the Asian-Australasian Association of Animal Production Societies and 23rd Biennial Conference of the Australian Society of Animal Production held July 3-7, 2000, Sydney, Australia.
NAL Call No.: SF55.A78A7
Descriptors: sheep disease, Johne's disease, mortality statistics, Mycobacterium avium subsp. paratuberculosis, Australia.

Feola, R. P.; Czuprynski, C. J. Binding of bovine growth hormone to Mycobacterium avium ss paratuberculosis. Comparative Immunology Microbiology and Infectious Diseases. July 2000; 23(3): 153-162. ISSN: 0147-9571. Note: In English with English and French summaries.
NAL Call No.: QR180.C62
Descriptors: cultured bacterial cultures, addition of bGH (5 mug/ml) had inhibitory effect on growth of Mycobacterium avium subsp. paratuberculosisin Middlebrook 7H9 broth, first report of a mammalian hormone binding to MAP.

Ferroglio, E.; Nebbia, P.; Robino, P.; Rossi, L.; Rosati, S. Mycobacterium paratuberculosis infection in two free-ranging Alpine ibex. Revue Scientifique et Technique Office International des Epizooties. December, 2000; 19 (3): 859-862. ISSN: 0253-1933 Note: In English with English, French, and Spanish summaries.
NAL Call No.: SF781.R4
Descriptors: Alpine ibex (Capra ibex), free ranging, disease incidence, PCR for insertion sequence IS900, post mortem examination, tested positive to Zielh-Nielsen stain.

Fridriksdottir, V.; Gunnarsson, E.; Sigurdarson, S.; Gudmundsdottir, K.B. Paratuberculosis in Iceland: epidemiology and control measures, past and present. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 263-267. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Paratuberculosis as well as the slow virus infections maedi/visna and jaagsiekte came to Iceland in 1933 when 20 sheep of the Karakul breed were imported from Halle, Germany. At least five of these sheep were subclinical carriers of paratuberculosis. Within 16 years paratuberculosis together with the other Karakul diseases (maedi/visna and jaagsiekte) almost ruined sheep farming, the main agricultural industry in Iceland. The first clinical case of paratuberculosis in sheep was confirmed in 1938, and in cattle in 1944. The first cattle cases of paratuberculosis appeared on farms where the disease had been prevalent in sheep for years. The virulence in cattle appeared to be considerably lower than in sheep. Extensive measures were used to control the spread of paratuberculosis in sheep. Hundreds of kilometres of fences were put up and used together with natural geographic borders to restrict the movement of sheep from infected areas. Serological and other immunological tests were also used to detect and dispose of infected individuals. These measures proved inadequate and the disease could not be eradicated. Culling and restocking of uninfected sheep in endemic areas eradicated maedi/visna and jaagsiekte but not paratuberculosis. Experiments showed that vaccination against paratuberculosis could reduce mortality in sheep by 94%. Vaccination of sheep in endemic areas has been compulsory in Iceland since 1966 and as a result losses have been reduced considerably. Today, serology is used to detect and control infection in cattle herds. Furthermore, serology is used to control vaccination of sheep and screen for infection in non-endemic areas. The complement fixation (CF) test for paratuberculosis has been used until now, but recently we have started comparing the CF test with the CSL absorbed ELISA test.
Descriptors: sheep, cattle, Mycobacterium avium subsp. paratuberculosis, disease control, epidemiology, history of introduction, diagnosis, virulence, disease transmission, fences, culling, vaccination, mortality, screening, economic impact, complement fixation tests, Iceland.

Garrido, J.M.; Cortabarria, N.; Oguiza, J.A.; Aduriz, G.; Juste, R.A. Use of a PCR method on fecal samples for diagnosis of sheep paratuberculosis. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 379-386. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: The high sensitivity of PCR compared to the difficulties of fecal culture in sheep prompted the development of PCR protocols for detection of Mycobacterium avium subsp. paratuberculosis DNA in sheep feces. Although the PCR itself is well developed, and does not pose large technical problems, concentrating the bacteria from samples that may contain low numbers of bacilli using practical methods is still the main difficulty for the use of this technique. In this study, we describe an extraction protocol for the concentration and purification of M. avium subsp. paratuberculosis DNA from fecal samples and we compare it with other methods. The diagnostic performance of the freeze-boiling method was evaluated using a reference method [Veterinary Record, 134 (1994) 95] on fecal samples from a group of selected sheep from different flocks of known individual serological, pathological, and cultural paratuberculosis status. Using, as a reference, a combination of results in those conventional methods, the freeze-boiling PCR protocol showed a sensitivity of 94.1%, and a specificity of 92.3%.
Descriptors: sheep, Mycobacterium avium subsp. paratuberculosis, polymerase chain reaction, fecal culture, DNA, concentration and purification diagnostic technique, comparison study, reference data from known animals, sample processing.

Gasteiner, J.; Awad-Masalmeh, M.; Baumgartner, W. Mycobacterium avium subsp. paratuberculosis infection in cattle in Austria, diagnosis with culture, PCR and ELISA. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 339-349. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Serum samples from healthy, infected (n = 11) and diseased (n = 2) cattle as well as positive (n = 17) and negative (n = 41) reference sera were tested for antibodies to Mycobacterium avium subsp. paratuberculosis with two ELISA-methods (A-ELISA, Allied Monitors, Fayette, USA; H-ELISA, Institute of Microbiology and Animal Diseases, Veterinary University Hannover). Fecal samples of these animals were examined by PCR and culture. Also field serum samples found to be positive (n = 664) or inconclusive (n = 1589) by A-ELISA during a survey done on 11028 cattle of 2757 farms at different districts in Austria were retested with H-ELISA (Gasteiner et al., 1999). In both ELISA-methods total agreement between antibody detection and shedding of M. avium subsp. paratuberculosis (PCR, culture) in cases of diseased animals during the testing period was found. In subclinically infected animals H-ELISA showed a better correlation with the results of PCR and fecal culture. Reference serum samples of culturally negative cattle were negative in 98% by H-ELISA and in 82% by A-ELISA, and those of positive animals were positive in 59% by H-ELISA and in 82% by A-ELISA. The 664 A-ELISA positive field serum samples were positive in 20.5%, inconclusive in 32.5% and negative in 47% by H-ELISA. A-ELISA inconclusive sera gave positive reactions by H-ELISA in 5.2%, negative in 74.8% and inconclusive results in 20%. The highest prevalence of antibodies (7.9% by A- and 2.2% by H-ELISA) against M. avium subsp. paratuberculosis were found in cattle at the age of six and seven years. Seropositive animals were found at all tested ages. The A-ELISA gave two to three times more positive reactors than the H-ELISA. Also both, tests showed the highest prevalence of reagents among Holstein Friesian (6.2% by A-ELISA, 2.5% by H-ELISA) followed by other cattle breeds. Seropositive cattle were observed in all districts of Austria in 3.3-7.1% and in 0.5-1.8% of herds according to A- and H-ELISA, respectively.
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, diagnostic techniques, ELISA, cell cultures, polymerase chain reaction, disease diagnosis evaluation, blood serum, antibodies, infectious organism shedding, asymptomatic infections, cattle breed differences, disease prevalence, Austria.

Giese, S.B.; Ahrens, P. Detection of Mycobacterium avium subsp. paratuberculosis in milk from clinically affected cows by PCR and culture. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 291-297. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Milk and faeces samples from cows with clinical symptoms of paratuberculosis were examined for the presence of Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis) by culture and PCR. M. paratuberculosis was cultivated in variable numbers from faeces or intestinal mucosa in eight of 11 animals. In milk from five cows (all faeces culture positive), we cultivated a few colonies of M. paratuberculosis (<100 CFU per ml). Milk samples from two cows were PCR positive (both animals were faeces culture positive, and one cow was milk culture positive). One cow was culture negative on intestinal mucosa, but culture positive in milk, and two cows were negative in culture and PCR from both faeces and milk. In conclusion, the presence of M. paratuberculosis could be detected in raw milk by PCR, but cultivation of milk was more sensitive.
Descriptors: cows, polymerase chain reaction, detection, milk, cell culture, feces, diagnostic techniques, symptoms, clinical aspects, intestinal mucosa, evaluation, Mycobacterium avium subsp. paratuberculosis.

Godfroid, J.; Boelaert, F.; Heier, A.; Clavareau, C.; Wellemans, V.; Desmecht, M.; Roels, S.; Walravens, K. First evidence of Johne's disease in farmed red deer (Cervus elaphus) in Belgium. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 283-290. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: In a deer farm, chronic diarrhoea was seen in a 4-year-old hind. This animal died in poor condition on the farm and Johne's disease was suspected. Ziehl-Neelsen staining of the faeces of this hind were positive for the presence of clumps of small acid-fast bacilli, but faecal cultures remained negative. Direct and indirect tests were performed on 24 hinds and stags (yearlings, 2- and 4-year-old animals). The indirect tests performed were serology (Mycobacterium paratuberculosis antibody ELISA, HerdChek, Idexx), comparative cervical skin test (CCT) and lymphoproliferation test (LT) using Mycobacterium bovis purified protein derivative (PPD) and Mycobacterium avium PPD as antigens. Three positive serological results, three positive CCT and eight positive LT were observed in hinds and stags older than 2 years. No positive serological results were observed in the yearling group, whereas some sensitisation was observed in the CCT as well as in the LT for the same group of animals. The degree of concordance between these indirect tests was poor. The three seropositive animals were slaughtered and subjected to post-mortem examination. Histopathology was performed on mesenteric lymph nodes and on the terminal ileum. Visual changes in some mesenteric lymph nodes were observed, no gross lesion was seen in the intestine. Although Ziehl-Neelsen staining yielded no positive results, a catarrhal focal necrotic enteritis associated with a granulomatous lymphadenitis compatible with Johne's disease was evidenced. The mycobacterial cultures on organ samples from slaughtered animals were positive after 2 months for M. avium subspecies paratuberculosis and negative for M. bovis and M. avium. This is the first description of Johne's disease in a deer farm in Belgium.
Descriptors: Cervus elaphus, farmed red deer, paratuberculosis, incidence, diarrhea, mortality, diagnosis, feces, diagnostic techniques, Mycobacterium bovis, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium, antigens, symptoms, histopathology, lymph nodes, intestines, necrosis, Belgium.

Goswami, T. K.; Joardar, S. N.; Ram, G. C. Antigenic analysis of M. paratuberculosis strain TEPS by SDS-PAGE and two-dimensional immunoelectrophoresis. Indian Journal of Animal Sciences. August 2000; 70(8): 789-791. ISSN: 0367-8318.
NAL Call No.: 41.8 IN22
Descriptors: 40 polypeptide fractions, SDS-PAGE, Coommassie brillian blue staining, Schiff staining, Mycobacterium avium subsp. paratuberculosis.

Goswami, Tapas Kumar; Joardar, Siddhartha Narayan; Ram, Gulab Chandra; Banerjee, Rabin; Singh, Dhirendra Kumar. Association of Mycobacterium paratuberculosis in Crohn's disease and Johne's disease: A possible zoonotic threat. Current Science. October 25, 2000; 79(8): 1076-1081. ISSN: 0011-3891.
NAL Call No.: 475 SCI23
Descriptors: review, possible association between Johne’s and Crohn’s, isolation studies, experimental disease production, histopathological and immunological evidences, DNA sequence analysis, possible food borne disease, Mycobacterium avium subsp. paratuberculosis.

Goswami, T. K.; Swamy, N.; Suchitra, S.; Joardar, S. N.; Ram, G. C. Electrophoretic behaviour of Mycobacterium paratuberculosis soluble protein antigens in rocket immuno-electrophoresis. Indian Veterinary Medical Journal. December, 2000; 24(4): 285-287. ISSN: 0250-5266.
Descriptors: immuno-electrophoretic behaviour, native antigens, Mycobacterium avium subsp. paratuberculosis (strain TEPS), hyperimmune goat sera, rocket immuno-electrophoretic technique, 8 native precipitin peaks, qualitative and quantitative test, detection of antigenic proteins.

Goswami, T. K.; Joardar, S. N.; Ram, G. C. In-vitro and in-vivo detection of cross-reacting antigens of M. paratuberculosis and M. bovis. Journal of Applied Animal Research. June 2000; 17(2): 285-290. ISSN: 0971-2119. Note: In English with English and Sanskrit summaries.
NAL Call No.: SF55. I4J68
Descriptors: Mycobacterium avium subsp. paratuberculosis, delayed type of hypersensitivity, ELISA, crossed immunoelectrophoretic (CIE) technique.

Grant, I.R.; Pope, C.M.; O'Riordan, L.M.; Ball, H.J.; Rowe, M.T. Improved detection of Mycobacterium avium subsp. paratuberculosis in milk by immunomagnetic PCR. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 69-378. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: The potential use of a novel immunomagnetic PCR (IMS-PCR) technique as a rapid method to screen milk samples for the presence of Mycobacterium avium subsp. paratuberculosis (M. ptb) was assessed. Immunomagnetic separation (IMS) for M. ptb, developed at Queen's University, Belfast, was applied to milk samples prior to IS900 PCR in order to selectively concentrate any M. ptb cells present and, at the same time, separate the cells from constituents of milk likely to inhibit subsequent PCR. This increased the sensitivity of IS900 PCR. IMS-PCR sensitivity could be further increased by initial centrifugation (2500 g for 20 min) of larger volumes of milk (10 and 50 ml), and resuspension of the sediment into a 1 ml volume appropriate for IMS treatment. Following IMS, template DNA for IS900 PCR was obtained by heating the bead-cell suspension in a thermal cycler at 100 degrees C for 15 min. It was estimated that the IMS-PCR assay could detect approximately 10(3) CFU of M. ptb per 50 ml of milk (equivalent to 20 CFU/ml), whereas the minimum detection limit of direct IS900 PCR was estimated at 10(5) CFU of M. ptb per 50 ml (equivalent to 2000 CFU/ml). A blind trial was carried out in which a total of 40 spiked (10(6) CFU M. ptb) and unspiked, raw and laboratory-pasteurised milk samples were independently tested by IMS-PCR and conventional IS900 PCR. IMS-PCR correctly identified 97.5% of milk samples (sensitivity 100%, specificity 95%), including spiked milk samples before and after laboratory-pasteurisation. One false positive result was obtained which may have resulted from carryover between samples during the IMS procedure. Conventional IS900 PCR correctly identified only 72.5% of the same 40 milk samples (sensitivity 23%, specificity 100%). IMS-PCR was also shown to be capable of detecting natural M. ptb infection in raw sheep's milk, and raw and commercially pasteurised cows' milk.
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, detection in milk, immunomagnetic polymerase chain reaction assay, diagnostic techniques, evaluation, screening method, inhibition, raw sheep milk, pasteurized cow's milk.

Greig, A. Johne's disease in sheep and goats. In Practice. Mar 2000; 22(3): 146-151. ISSN: 0263841X.
NAL Call No.: SF601. I4
Descriptors: sheep, goats, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, epidemiology, pathogenesis, chronic course, histopathology, differential diagnosis, species differences, disease control.

Gwozdz, J. M.; Thompson, K. G.; Murray, A.; Reichel, M. P.; Manktelow, B. W.; West, D. M. Comparison of three serological tests and an interferon-gamma assay for the diagnosis of paratuberculosis in experimentally infected sheep. Australian Veterinary Journal. November 2000; 78(11): 779-783. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: 14 sheep, experimental infection, Mycobacterium avium subsp. paratuberculosis, comparison study, complement fixation test, an agar gel immunodiffusion test, an enzyme-linked immunosorbent assay, whole blood interferon-gamma assay for paratuberculosis.

Gwozdz, J. M.; Thompson, K. G.; Murray, A.; West, D. M.; Manktelow, B. W. Use of the polymerase chain reaction assay for the detection of Mycobacterium avium subspecies paratuberculosis in blood and liver biopsies from experimentally infected sheep. Australian Veterinary Journal. September 2000; 78(9): 622-624. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: sheep diagnostic evaluation, Mycobacterium avium subsp. paratuberculosis, PCR assay, 14 animals, experimental infection, sampled over 53 weeks, not a useful and reliable method.

Gwozdz, J. M.; Thompson, K. G.; Manktelow, B. W.; Murray, A.; West, D. M. Vaccination against paratuberculosis of lambs already infected experimentally with Mycobacterium avium subspecies paratuberculosis. Australian Veterinary Journal. August 2000; 78(8): 560-566. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: sheep, protective value, live-attenuated vaccine effects, sheep, exposed, Mycobacterium avium subsp. paratuberculosis, investigation, progression, systemic immune response, experimental infection, 28-1 month old lambs, vaccine effectiveness, IFN-gamma in blood, antibody concentration of sera, sequential monitoring, IS900-baced PCR, ileum, ileocaecal lymph nodes, histological examination.

Hope, A. F.; Kluver, P. F.; Jones, S. L.; Condron, R. J. Sensitivity and specificity of two serological tests for the detection of ovine paratuberculosis. Australian Veterinary Journal. December 2000; 78(12): 850-856. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: 1257 sheep, serum samples, testing sensitivity and specificity, absorbed ELISA and an AGID test, detection of clinical and subclinical paratuberculosis, Mycobacterium avium subsp. paratuberculosis, disease detection tests considered useful, test differences.

Hulten, K.; El Zimaity, H. M.; Collins, M. T.; Graham, D. Y.; El Zaatari, F. A. K. Cell wall deficient forms of M. avium subsp. paratuberculosis found in tissues from animals with Johne's disease by in situ hybridization. Abstracts of the General Meeting of the American Society for Microbiology. 2000; 100: 656. ISSN: 1060-2011. Note: 100th General Meeting of the American Society for Microbiology, Los Angeles, California, USA, May 21-25, 2000.
NAL Call No.: QR1.A5
Descriptors: cattle, digoxigenin stain, Johne’s disease, bacterial forms isolation.

Hulten, K.; Karttunen, T. J.; El Zimaity, H. M. T.; Naser, S. A.; Collins, M. T.; Graham, D. Y.; El Zaatari, F. A. K. Identification of cell wall deficient forms of Mycobacterium avium subsp. paratuberculosis in paraffin embedded tissues from animals with Johne's disease by in situ hybridization. Journal of Microbiological Methods. October 2000; 42(2): 185-195. ISSN: 0167-7012.
NAL Call No.: QR65.J68
Descriptors: subclinical stage, Johne’s disease, possible zoonotic disease, sarcoidosis, Crohn’s, spiked beef cubes, formalin fixed and paraffin embedded, IS900 Mycobacterium avium subsp. paratuberculosis specific probe labeled with digoxigenin, distinguish between the acid-fast and CWD forms of Mycobacterium paratuberculosis, localized in tissue sections.

Hulten, K.; Karttunen, T.J.; El Zimaity, H.M.T.; Naser, S.A.; Almashhrawi, A.; Graham, D.Y.; El Zaatari, F.A.K. In situ hybridization method for studies of cell wall deficient M. paratuberculosis in tissue samples. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 513-518. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Cell wall deficient forms of mycobacteria may be important in the pathogenesis of Crohn's disease and sarcoidosis. However, no method has been available to localize this type of organisms in tissue sections. We developed an in situ hybridization method for the demonstration of Mycobacterium paratuberculosis spheroplasts (cell wall deficient forms) in paraffin embedded tissue sections. M. paratuberculosis spheroplasts were prepared by treatment with glycine and lysozyme. Pieces of beef were injected with the prepared spheroplasts. The samples were fixed in buffered formalin and paraffin embedded. A M. paratuberculosis-specific probe derived from the IS900 gene was used. Specificity was controlled by using an irrelevant probe and by hybridizing sections with spheroplasts from other bacteria. Beef samples injected with M. paratuberculosis spheroplasts were the only samples that hybridized with the probe. Beef samples containing acid-fast or spheroplast forms of M. smegmatis and M. tuberculosis as well as the acid-fast forms of M. paratuberculosis did not hybridize with the probe. Unrelated bacterial controls, i.e. Helicobacter pylori and Escherichia coli were also negative in the assay. In situ hybridization with the IS900 probe provides a specific way to localize M. paratuberculosis spheroplasts in tissue sections and may be useful for studies of the connection between M. paratuberculosis and Crohn's disease and sarcoidosis. The assay may also be valuable for studies on Johne's diseased animals.
Descriptors: Mycobacterium avium subsp. paratuberculosis, cell walls deficient forms, spheroplasts, pathogenesis, DNA hybridization, tissues, genes, identification, beef, Helicobacter pylori, Escherichia coli, diagnostic techniques, Crohn's disease, paratuberculosis, sarcoidosis, assay, Johne's disease.

Ikonomopoulos, John A.; Gorgoulis, Vassilis G.; Kastrinakis, Nikos G.; Zacharatos, Panayotis V.; Kokotas, Stavros N.; Evangelou, Kostas; Kotsinas, Athanassios G.; Tsakris, Athanassios G.; Manolis, Evangelos N.; Kittas, Christos N. Sensitive differential detection of genetically related mycobacterial pathogens in archival material. American Journal of Clinical Pathology. December 2000; 114(6): 940-950. ISSN: 0002-9173.
NAL Call No.: 448.8 Am34
Descriptors: humans, PCR assay, immunogenic protein MPB64 gene, outward-primed PCR (OPPCR), IS6110 element, amplification of IS1110 and 16S ribosomal RNA sequences, dot blotting assay, formalin-fixed paraffin-embedded samples from patients with tuberculosis, sarcoidosis, or Crohn’s disease, Mycobacterium avium, Mycobacterium intracellulare, Mycobacterium paratuberculosis.

Jadhav, K.M.; Dave, M.R.  Haematological and biochemical changes in Johnes disease in sheep.  Intas Polivet.  2000; 1(2): 193-194.  ISSN:  0972-1738.
Descriptors:  sheep, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, calcium, erythrocyte count, packed cell volume, hemoglobin levels, hematology, biochemicals, magnesium, Mg, phosphates salts, potassium, P, sodium, Na.

Jakobsen, M. B.; Alban, L.; Nielsen, S. S. A cross-sectional study of paratuberculosis in 1155 Danish dairy cows. Preventive Veterinary Medicine. July 3, 2000; 46(1): 15-27. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: milk samples, Mycobacterium avium subsp. paratuberculosis, 1155 cows, 22 dairy farms, risk factors, ELISA, multiple logistic regression analysis, Jersey vs. large breeds, high parity vs. low parity, the first month after calving vs. other months of lactation, large herd size vs. small herd size, Denmark.

Johnson, Ifearulundu Y. J.; Kaneene, J. B.; Sprecher, D. J.; Gardiner, J. C.; Lloyd, J. W. The effect of subclinical Mycobacterium paratuberculosis infection on days open in Michigan, USA, dairy cows. Preventive Veterinary Medicine. August 10, 2000; 46(3): 171-181. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: Mycobacterium avium subsp. paratuberculosis, prospective cohort study design, dairy cattle, usefulness of ELISA and fecal culture as diagnostic tools, reproduction records, 18 month monitoring period, increase in days open, suggested impact of negative energy balance in subclinical infected cows, Michigan.

Jubb, T.; Galvin, J. Herd testing to control bovine Johne's disease. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 423-428. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: In 1996, the cattle industries and government in the Australian state of Victoria established a Johne's disease (JD) test and control program under which participating farmers are provided with an annual ELISA test of their adult herd and advice on disease control that is tailored to their farm. The program is delivered through private veterinarians under contract with the government. There are over 600 herds enrolled in the program and about one third of these have had three or more whole herd tests. This paper provides a review of the program to date. It describes changes in ELISA reactor rates and numbers of clinical cases, and provides evidence for progress in the program.
Descriptors: cattle herds, Mycobacterium avium subsp. paratuberculosis disease control, Australian government policy, diagnostic text, ELISA, veterinarians role, disease incidence, surveillance, program review, Victoria, Australia.

Juste, R.A.; Garrido, J.M.; Aduriz, G.  Un siglo de progreso y controversia sobre la paratuberculosis. I. La situacion actual del conocimiento sobre la infeccion.  [A century of progress and controversy of paratuberculosis. I. The current situation of knowledge of the infection.]  Medicina Veterinaria.  2000; 17(5): 88-101.  ISSN:  0212-8292.  Note:  In Spanish with an English summary.  
Descriptors:  Mycobacterium avium subsp. paratuberculosis, Johne's disease is a well known disease entity since the end of the 19th century, review of etiology and pathogenesis of the disease.

Kennedy, D.J.; Allworth, M.B. Progress in national control and assurance programs for bovine Johne's disease in Australia. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 443-451. ISSN: 03789-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Cattle strains of Mycobacterium paratuberculosis are known to infect cattle, goats and alpaca in southeastern Australia, where there are also significant numbers of farmed deer. Although sheep strains have recently been identified in some cattle in Australia, epidemiological evidence to date supports the distinction (between bovine Johne's disease (JD), caused by cattle strains in cattle, goats and alpaca, and ovine JD, caused by sheep strains in sheep and goats) for the purposes of control and assurance programs. The National Johne's Disease Control Program is coordinated by the Australian Animal Health Council, working with the livestock industries and with the Commonwealth, state and territory governments. The council also brokers industry and government funding for the program. The National Johne's Disease Market Assurance Program for Cattle was launched in 1996 as the first of a suite of voluntary national market assurance programs (MAPs) to assess and certify herds as negative for JD. By December 1998, over 550 herds had achieved an assessed negative status. A MAP was also launched for alpaca in 1998 and a program for goats should be finalised in early 1999. National standards for state control of JD through zoning, movement controls and procedures in infected and suspect herds have also been developed. The paper covers factors affecting development and implementation, uptake of and improvements to national control and assurance programs for bovine JD in Australia.
Descriptors: Johne's disease, cattle, paratuberculosis, disease control, government policy, Mycobacterium avium subsp. paratuberculosis, goats, alpacas, deer, sheep, epidemiology, certification, disease incidence, Australia.

Koets, A. P.; Adugna, G.; Janss, L. L. G.; van Weering, H. J.; Kalis, C. H. J.; Wentink, G. H.; Rutten, V. P. M. G.; Schukken, Y. H. Genetic variation of susceptibility to Mycobacterium avium subsp. paratuberculosis infection in dairy cattle. Journal of Dairy Science. November 2000; 83(11): 2702-2708. ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Descriptors: Dutch dairy cattle, 3020 cows, infection status at slaughter, standard polygenic statistical probit model was used to estimate heritabilities, vaccination trial data, variable susceptibilities, genetic selection as a control measure.

Koets, A.P.; Rutten, V.P.M.G.; Bakker, D.; van der. Hage, M.H.; van Eden, W. Lewis rats are not susceptible to oral infection with Mycobacterium avium subsp. paratuberculosis. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 487-495. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Pathogenesis studies of Mycobacterium avium subsp. paratuberculosis infection in ruminants are hampered by the long incubation time of the disease. A laboratory animal model with a shorter incubation time would facilitate research in this field. Although small rodents are usually considered to be resistant to M.a. paratuberculosis infection, several susceptible murine strains have been found. To our knowledge, there are no detailed reports with regard to susceptibility in rats. The Lewis rat is a valuable model for inflammatory bowel disease studies as well as autoimmune diseases involving mycobacteria as inducing agents. In this study Lewis rats were used to investigate their potential as a small laboratory animal model for paratuberculosis. In total 28 female Lewis rats were orally inoculated with M.a. paratuberculosis. The rats were first inoculated at 3 weeks of age, and 12 more inoculations followed in increasing intervals during the 3 months to follow. Eight control rats received a sham inoculation. Over 9 months, two rats from each group were sacrificed at regular intervals and immunological and histopathological examinations were performed on the gastrointestinal tract, the liver and the spleen. None of the rats developed lesions which were indicative of mycobacterial infection as determined by histology with HE and Ziehl-Neelsen staining. The bacteria could not be recultured from samples taken from the gut, the liver or the spleen. The immunological tests however, showed that bacteria had entered via the intestinal tract. From this study it appears that Lewis rats are resistant to oral inoculation with M.a. paratuberculosis, and not suitable as a model to study the immunopathogenesis of paratuberculosis as it occurs in ruminants.
Descriptors: rats, Mycobacterium avium subsp. paratuberculosis, oral administration, infection, susceptibility, pathogenesis, animal models, experimental infections, histopathology, digestive tract, liver, spleen, postmortem examinations, lesions.

Kramsky, J.A.; Miller, D.S.; Hope, A.; Collins, M.T. Modification of a bovine ELISA to detect camelid antibodies to Mycobacterium paratuberculosis. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 333-337. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Mycobacterium avium subsp. paratuberculosis infection, or Johne's disease, reportedly has a low prevalence in South American camelid populations. Recently, however, single cases in the United States as well as an outbreak of the disease in Australian alpacas (Lama pacos) have been described. To provide a rapid and cost-effective method of diagnosing Johne's disease in this species, the bovine Parachek Johne's Absorbed EIA (CSL, Vic., Australia) was modified to create a camelid-specific serum antibody assay. An anti-llama IgG conjugated to horseradish peroxidase replaced the anti-bovine immunoglobulin. Checkerboard titration of principal reagents was performed using serum from nine tissue and/or fecal culture-positive camelids. Optimal dilutions of key components were determined in order to provide clear discrimination between positive and negative controls. Completion of a kinetic assay determined the optical density at which the enzyme-substrate reaction should be stopped. A herd of 100 camelids with no history of disease or exposure to M. a. paratuberculosis, a subset of which were tissue and/or fecal culture-negative, was tested to establish a cut-off value. Sample results were expressed as a percentage of the results for control sera by transforming optical density values to ELISA values (EV%). A preliminary EV% cut-off of 20 was established. Using this prototype assay, culture-positive animals showed significantly different antibody responses from culture-negative animals. These results indicate that this camelid-specific ELISA, once refined, may be a useful tool for screening camelid herds for M. a. paratuberculosis infection.
Descriptors: alpacas, llamas, Mycobacterium avium subsp. paratuberculosis, detection methods, ELISA, diagnosis disease outbreaks, IgG, herds, assays.

Lawlor, H. A.; Mutharia, L. M. Characterization of the thioredoxin system of Mycobacterium paratuberculosis. Abstracts of the General Meeting of the American Society for Microbiology. 2000; 100: 649. ISSN: 1060-2011. Note: 100th General Meeting of the American Society for Microbiology, Los Angeles, California, USA, May 21-25, 2000.
NAL Call No.: QR1.A5
Descriptors: pET expression system, Mycobacterium intracellulare, Mycobacterium avium subsp. paratuberculosis, thioredoxin system; Mycobacterium tuberculosis, genome, gentamycin, recombinant his tagged proteins, thioredoxin system characterization, antibodies, reductase, redox-cycling system, thioredoxin reductase gene.

Lund, B. M.; Donnelly, C. W.; Rampling, A. Heat resistance of Mycobacterium paratuberculosis. Letters in Applied Microbiology. August 2000; 31(2): 184-185. ISSN: 0266-8254.
NAL Call No.: QR1.L47
Descriptors: bacterial characteristics, temperature tolerance, viability testing, Crohn’s disease, Johne's disease, Mycobacterium avium subsp. paratuberculosis.

Marsh, I.; Whittington, R.; Millar, D. Quality control and optimized procedure of hybridization capture-PCR for the identification of Mycobacterium avium subsp. paratuberculosis in faeces. Molecular and Cellular Probes. August 2000; 14(4): 219-232. ISSN: 0890-8508.
NAL Call No.: RB43.7.M63
Descriptors: fecal samples, cattle, Johne’s disease, sheep, capture and washing of magnetic beads, low cost method, diagnostic method, pooled samples.

Michel, A.L.; Bastianello, S.S. Paratuberculosis in sheep: an emerging disease in South Africa. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 299-307. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: During a serological survey for ovine paratuberculosis a total of 145934 ovine serum samples from 2019 farms throughout South Africa were tested by means of the AGID assay. Fifty-two infected farms were identified in the Western Cape and Eastern Cape provinces. Links between infected farms in the two provinces were established. Examination of the distribution of infected farms in the Western Cape indicated a positive correlation between acid soils and occurrence of infection. In an attempt to increase the sensitivity and facilitate screening of large numbers of sera two commercial ELISA systems were evaluated for their potential use in a future monitoring program. Sera from histologically positive sheep and known negative sheep flocks were used. The highest sensitivity (50.9%) was found if both ELISA systems were run concurrently and the results of both systems combined.
Descriptors: sheep, Mycobacterium avium subsp. paratuberculosis, serological surveys, bioassays, farms, geographical distribution, acid soils, screening for disease, ELISA, monitoring, South Africa.

Miller, D.S.; Collins, M.T.; Smith, B.B.; Anderson, P.R.; Kramsky, J.; Wilder, G.; Hope, A.  Specificity of four serologic assays for Mycobacterium avium ss paratuberculosis in llamas and alpacas: a single herd study.  Journal of Veterinary Diagnostic Investigation.  2000; 12 (4): 345-353.  ISSN: 1040-6387.
NAL Call No.:  SF774.J68
Descriptors:  llamas, alpacas, Mycobacterium avium subsp. paratuberculosis, serology, ELISA, immunodiffusion tests, antibody testing, diagnostic value, accuracy.

Momotani, E.; Miyama, M.; To, T. L.; Yoshihara, K.; Gotoh, H. Adhesion molecules and chemokines in granulomas by Mycobacterium avium subsp. paratuberculosis in TNF alpha deficient mice. Immunology Letters. September 2000; 73(2-3): 194. ISSN: 0165-2478. Note: 24th European Immunology Meeting of the European Federation of Immunological Societies (EFIS), Poznan, Poland, September 23-26, 2000.
NAL Call No.: QR180. I53
Descriptors: C57BL/6 mouse model, tumor necrosis factor alpha deficiency, wild type, Mycobacterium avium subsp. paratuberculosis, fibronectin, RANTES, epithelioid granuloma cell border expression, intercellular adhesion molecule 1, macrophage chemoattractant protein 1, macrophage chemoattractant protein 3, granuloma expression.

Muskens, J.; Barkema, H.W.; Russchen, E.; van Maanen, K.; Schukken, Y.H.; Bakker, D. Prevalence and regional distribution of paratuberculosis in dairy herds in the Netherlands. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 253-261. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: In the Netherlands a survey was conducted to estimate the prevalence of paratuberculosis in dairy herds. In total 15822 cows of at least 3 years of age, belonging to 378 herds were tested using an absorbed ELISA. Of these herds, 55% (n = 207) had one or more serologically positive cows. Of the positive non-vaccinated herds, most had one (n = 98) or two (n = 49) positive cows. The percentage positive cows per herd was 2.5 +/- 3.2%. The true prevalences on cow and herd levels, based on a test sensitivity that ranged from 0.3 to 0.4 and a specificity that ranged from 0.985 and 0.995, were estimated at 2.7-6.9% and 31-71%. Seven herds had been vaccinated against paratuberculosis and these herds had a significantly higher percentage of serologically positive cows (23%) than the non-vaccinated herds (2.5%). In conclusion, a small percentage of the dairy cows and a high percentage of the dairy herds in the Netherlands is serologically positive. The percentages true infected cows and herds are difficult to estimate precisely due to uncertainties in test sensitivity and specificity.
Descriptors: dairy cattle herds, Mycobacterium avium subsp. paratuberculosis, disease prevalence, geographical distribution, surveys, ELISA, vaccination, seroprevalence.

Naser, S.A.; Hulten, K.; Shafran, I.; Graham, D.Y.; El Zaatari, F.A.K. Specific seroreactivity of Crohn's disease patients against p35 and p36 antigens of M. avium subsp. paratuberculosis. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 497-504. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Crohn's disease (CD) is a chronic inflammatory bowel disease that is similar to Johne's disease in ruminants. Recent data have strengthened the association of Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis) with CD. To provide more evidence of an etiological association, antibody reactivities from CD patients were tested by immunoblotting against recombinant antigens that were identified previously from our M. paratuberculosis genomic library. Two clones (designated pMptb#40 (3.2-kb insert) and #48 (1.4-kb insert) expressing a 35K (p35)- and 36K (p36)-antigens showed specific reactivities with serum samples from CD patients. Serum samples from 75% of 53 CD patients, 14% of 35 normal individuals and 10% of 10 ulcerative colitis patients reacted to p35 antigen. Reactivities were also observed with serum samples from 89% of 89 CD patients, 14% of 50 normal controls and 15% of 29 ulcerative colitis patients reacted with p36 antigen. When the reactivity results from p35 and p36 were combined, the background from the controls was eliminated, i.e. only the CD patients reacted to both p35 and p36. The positive predictive value was 98% with specificity of 98% and the negative predictive value was 76% with sensitivity of 74% (39 positive out of 53). A statistical significance (p < 0.0001) was observed when the results from CD serum samples reacting with either or both antigens were compared to the controls. The reactivity of anti-M. paratuberculosis (specifically against p35 and p36 antigens) antibodies in a significant proportion of CD patients would suggest a causal role for the organism in CD.
Descriptors: humans, Crohn's disease Mycobacterium avium, immune response, antigens, infections, etiology, immunoblotting, recombinant antigens, Mycobacterium paratuberculosis, blood serum.

Nebbia, P.; Robino, P.; Ferroglio, E.; Rossi, L.; Meneguz, G.; Rosati, S. Paratuberculosis in red deer (Cervus elaphus hippelaphus) in the western Alps. Veterinary Research Communications. November 2000; 24(7): 435-443. ISSN: 0165-7380.
NAL Call No.: SF601.38
Descriptors: 19 red deer, Cottain Alps, DNA amplification on mesenteric lymph nodes, Mycobacterium avium subsp. paratuberculosis, Johne’s disease, detected, strain similar to bovine strains, in ability of serological tests for monitoring, serum antibodies by the AGID and ELISA tests.

Nielsen, S. S.; Thamsborg, S. M.; Houe, H.; Bitsch, V. Bulk-tank milk ELISA antibodies for estimating the prevalence of paratuberculosis in Danish dairy herds. Preventive Veterinary Medicine. March 29, 2000; 44(1-2): 1-7. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: Johne’s disease prevalence, Mycobacterium avium subsp. paratuberculosis, regional differences, ELISA to test antibodies in bulk milk testing, 6 milk collection centers, 900 herds examined, Denmark.

O'Doherty, A.; O' Grady, D.; Smith, T.; O' Farrell, K. J.; Egan, J. A survey of Johne's disease in imported animals in the Republic of Ireland. Irish Journal of Agricultural and Food Research. December 2000; 39(3): 486. ISSN: 0791-6833. Note: 6th Annual Agricultural Research Forum, March 14-15, 2000.
NAL Call No.: S539.5.I74
Descriptors: infection rates, surveillance, cattle, Mycobacterium avium subsp. paratuberculosis, disease incidence, imported cattle.

Oikawa, Shin; Katoh, Norio; Watanabe, Atsushi; Nishi, Hideki; Kurosawa, Takashi; Satoh, Hiroshi. Serum apolipoprotein A-I evaluated as a possible marker in cows with Johne's disease. Journal of Rakuno Gakuen University Natural Science. October 2000; 25(1): 37-42. Note: In Japanese with English summary.
Descriptors: Mycobacterium avium subsp. paratuberculosis, cattle, serum levels of apolipoprotein A-I as a disease indicator, protein levels, cholesterol serum concentration, phospholipids levels, albumin serum concentrations, symptomatic and asymptomatic cattle, reliable marker in evaluating the pathogenesis, intestinal dysfunction, Johne's disease.

Olsen, Ingrid; Reitan, Liv J.; Holstad, Gudmund; Wiker, Harald G. Alkyl hydroperoxide reductases C and D are major antigens constitutively expressed by Mycobacterium avium subsp. paratuberculosis. Infection and Immunity. Feb. 2000; 68(2): 801-808. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: alkyl hydroperoxide reductase C and D antigens, gamma-interferon, polyclonal and polyvalent antiserum, Mycobacterium avium subsp. avium, species differentiation.

Paisley, Larry G.; Tharaldsen, Jorun; Jarp, Jorun. A simulated surveillance program for bovine paratuberculosis in dairy herds in Norway. Preventive Veterinary Medicine. April 28, 2000; 44(3-4): 141-151. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: Monte Carlo simulation models, prevalence of Mycobacterium avium subsp. paratuberculosis, feasibility and potential results of a proposed national survey, low probability of detection, study not recommended, epidemiology.

Parrish, N. M.; Townsend, C. A.; Dick, J. D. N-octanesulphonylacetamide (OSA), an inhibitor of mycolic acid synthesis, inhibits the growth of Mycobacterium paratuberculosis and is potentiated by the addition of short chain alcohols. Abstracts of the General Meeting of the American Society for Microbiology. 2000; 100: 655. ISSN: 1060-2011. Note: 100th General Meeting of the American Society for Microbiology, Los Angeles, California, USA, May 21-25, 2000.
NAL Call No.: QR1.A5
Descriptors: bacterial infection, humans, antibacterial drug effects, butanol, ciproflozacin, ethanol, isoprppanol, mycobactin J, streptomycin.

Pavlik, I.; Bartl, J.; Dvorska, L.; Svastova, P.; Du Maine, R.; Machackova, M.; Ayle, W.Y.; Horvathova, A. Epidemiology of paratuberculosis in wild ruminants studied by restriction fragment length polymorphism in the Czech Republic during the period 1995-1998. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 231-251. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: In two studies carried out during the period 1995-1998, paratuberculosis was diagnosed in domestic and wild ruminants in the Czech Republic. The isolated Mycobacterium avium subspecies paratuberculosis strains were analysed by standardised restriction fragment length polymorphism (RFLP) [Pavlik, I., Horvathova, A., Dvorska, L., Bartl, J., Svastova, P., du Maine, R., Rychlik, I., 1999. Journal of Microbiological Methods 38, 155-167]. In December 1992, 19 late pregnant Charolais heifers were imported to the Czech Republic from Hungary (original import from France to Hungary). One 11-month-old heifer roamed in the wild in a range of approximately 15-20 km for 7 months from November 1993 to May 1994. Upon capture, the animal showed clinical signs of paratuberculosis (emaciation and diarrhoea). Seven other animals from the same herd were infected with the identical RFLP type B-C1 of M. paratuberculosis. During the period 1995-1996, samples were taken and examined from the small intestine and corresponding lymph nodes of 84 wild ruminants: 19 red deers (Cervus elaphus) and 65 roe-deers (Capreolus capreolus). These wild ruminants originated from 44 different locations within the same district from as the infected escaped heifer. Five M. paratuberculosis strains were isolated: one strain of RFLP type B-C1 from a stag and three strains of RFLP type B-C1 and one strain of RFLP type B-C9 from roe-deer. The three wild ruminants (one stag and two roe-deer) infected with the same RFLP type B-C1 were detected in the same area as the heifer, suggesting that this was the likely infection source. However, the infection source of the roe-deer infected with strain of RFLP type B-C9 was obviously different, and the stags that escaped from the farm were purchased from an area infected with this RFLP type. In the second study carried out during 1997-1998 in the whole Czech Republic (divided into 76 districts), 718 wild ruminants were examined from 90% of the districts. M. paratuberculosis was isolated from 25 (3.5%) animals from the wild, from farms and from game parks: 7.1% of 132 red deers, 1.5% of 336 roe-deers, 3.9% of 178 fallow deers (Dama dama), and 4.2% of 48 moufflons (Ovis musimon). This study discovered three RFLP types (B-C1, D-C12 and M-C16). A surprising finding was that of M. paratuberculosis (RFLP type B-C1) infection in roe-deer and a fallow deer in their natural habitat. The infection source was determined to have originated from two imported Holstein and Limousine cattle herds infected with the same strain. In the case of a mother and daughter roe-deer infected with RFLP type M-C16 and a fallow deer infected with RFLP type D-C12, all roaming in their natural habitat, the infection source was not discovered. The highest incidence of clinically ill wild ruminants was found in farmed red deer, and no relationship was found between the RFLP type or ruminant species and clinical status of animal.
Descriptors: heifers, Cervus elaphus, red deer, Mycobacterium avium subsp. paratuberculosis, epidemiology, restriction fragment length polymorphism, diagnosis, Mycobacterium avium, disease symptoms, diarrhea, disease transmission, herds, lymph nodes, small intestine, fallow deer, mouflon, habitats, Czech Republic.

Pavlik, I.; Matlova, L.; Bartl, J.; Svastova, P.; Dvorska, L.; Whitlock, R. Parallel faecal and organ Mycobacterium avium subsp. paratuberculosis culture of different productivity types of cattle. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 309-342. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Faecal (at least 3 months before slaughtering) and organ examinations were carried out in 611 animals (497 dairy, 69 dual-purpose and 44 beef cattle) originating from eight paratuberculosis infected cattle herds. The diagnosis in cattle was established by routine intestinal culture (ileum and the adjacent lymph nodes) after slaughter. In selected 132 animals, post-mortem intensive culture was performed on tissue samples collected from the gastrointestinal tract (duodenum, jejunum, ileum, ileocecal valve, caecum, rectum) and the corresponding lymph nodes, submandibular, retropharyngeal, tracheobronchial, liver and supramammary lymph nodes, kidney, liver and spleen. In 251 (41.1%) of all 611 animals, Mycobacterium avium subspecies paratuberculosis could be isolated from the faeces; in 164 (65.7%) out of 251 shedding animals the infection was detected in the ileum and adjacent lymph nodes. The detection of M. paratuberculosis by routine intestinal culture of faecal culture positive animals varied from 46.0% in animals shedding 1 CFU (colony forming unit), to 94.7% in massive shedders. On the contrary, M. paratuberculosis was detected by routine intestinal culture in 92 (25.5%) of the 360 faecal culture negative animals. Shedding animals had significantly higher (P < 0.01) number of organisms in their organs than non-shedding animals. During the intensive tissue cultivation from selected 132 animals, 72 (54.5%) of them were positive. For the negative animals, no significant difference was found between the detection rate in organs examined after slaughter with routine and intensive method. However, in the subgroup of tissue culture positive animals a highly significant difference (P < 0.01) was found by intensive examination (83.0%) compared with the routine examination (60.4%). Out of 72 tissue culture positive animals 73.6% of them harboured M. paratuberculosis in the gastrointestinal tract, 16.7% in the gastrointestinal tract and the parenchymatous organs, tracheobronchial and mandibular lymph nodes. The rest of the 9.7% of the infection was detected in the lymph nodes of head and lungs. Our study concerning the distribution of M. paratuberculosis by intensive examinations revealed a minimum effect of breed and production type on localisation of the agent. Thus, the results suggest that in case of an active infection, M. paratuberculosis can be localised in different organs of animals irrespective of their breed or production type.
Descriptors: dairy and beef cattle, dual purpose cattle, Mycobacterium avium subsp. paratuberculosis, feces and various organs examinations, organ distribution, pre-slaughter diagnosis, post slaughter, intestines, fecal culture, lymph nodes, postmortem examinations, digestive tract, kidneys, liver, spleen, shedding, in vitro culture.

Pym, Alexander S.; Brosch, Roland. Tools for the population genomics of the tubercle bacilli. Genome Research. December 2000; 10(12): 1837-1839. ISSN: 1088-9051.
Descriptors: molecular genetics, methods and techniques, genomics, Mycobacterium avium, Mycobacterium bovis, Mycobacterium leprae, Mycobacterium microti, Mycobacterium paratuberculosis, Mycobacterium tuberculosis, Mycobacterium ulcerans, Mycobacteriaceae, DNA, amplification, sequencing.

Rastogi, Nalin; Goh, Khye Seng; Berchel, Mylene; Bryskier, Andre. In vitro activities of the ketolides telithromycin (HMR 3647) and HMR 3004 compared to those of clarithromycin against slowly growing mycobacteria at pHs 6.8 and 7.4. Antimicrobial Agents and Chemotherapy. October 2000; 44(10): 2848-2852. ISSN: 0066-4804.
NAL Call No.: RM265.A5132
Descriptors: 34 strains tested, Mycobacterium bovis BCG, Mycobacterium ulcerans, Mycobacterium avium, Mycobacterium paratuberculosis, Mycobacterium africanum, Mycobacterium bovis, Mycobacterium simiae, semisynthetic ketolides, in vitro testing, anti-bacterial agents.

Reviriego, Francisco J.; Moreno, Miguel A.; Dominguez, Lucas. Soil type as a putative risk factor of ovine and caprine paratuberculosis seropositivity in Spain. Preventive Veterinary Medicine. Jan. 5, 2000; 43(1): 43-51. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: bacterial pathogen distribution, cross-sectional study, questionnaire date, 61 herds, goats, sheep, serum testing, agar-gel immunodiffusion, effects of soil types and herd size, Spain.

Rowe, M. T.; Grant, I. R.; Dundee, L.; Ball, H. J. Heat resistance of Mycobacterium avium subsp. paratuberculosis in milk. Irish Journal of Agricultural and Food Research. June 2000; 39(2): 203-208. ISSN: 0791-6833.
NAL Call No.: S539.5.I74
Descriptors: milk, Johne’s disease, Crohn’s disease, heat resistance investigated, (1) combined acid fast/viability stain to visualise viable Mycobacterium avium subsp. paratuberculosis in milk at different stages during pasteurisation; (2) comparison of thermal resistance of clumped and declumped Mycobacterium avium subsp. paratuberculosis cells, (3) assessing the lethality of a range of time/temperature heat treatments, effect of clumping.

Sanderson, Michael W.; Dargatz, David A.; Garry, Franklyn B. Biosecurity practices of beef cow-calf producers. Journal of the American Veterinary Medical Association. July 15, 2000; 217(2): 185-189. ISSN: 0003-1488.
NAL Call No.: 41.8 Am3
Descriptors: biosecurity practices, beef cattle, 2 phase study, cross-sectional survey, 2,713 cow/calf operations (phase 1), 1,190 cow/calf operations (phase 2), interview study, management practices, level of risky management practices, vaccines given, quarantine time, proportion of imported animals quarantined, testing for various diseases in imported animals, need for development of rational and cost effective biosafety plans.

Sanna, E.; Woodall, C. J.; Watt, N. J.; Clarke, C. J.; Pittau, M.; Leoni, A.; Nieddu, A. M. In situ-PCR for the detection of Mycobacterium paratuberculosis DNA in paraffin-embedded tissues. European Journal of Histochemistry. 2000; 44(2): 179-184. ISSN: 1121-760X.
Descriptors: sheep gut tissues, classical lesions of paratuberculosis, Mycobacterium avium subsp. paratuberculosis, negative control samples, 413 bp fragment of the IS900 sequence was amplified in-situ, hybridised to an internal PCR synthesised digoxygenin labelled probe, diagnostic and path of genesis potential.

Selby, W.Pathogenesis and therapeutic aspects of Crohn's disease. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 505-511. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Crohn's disease is a chronic, relapsing inflammatory condition affecting any part of the human gastrointestinal tract. It is characterized by transmural inflammation with deep ulceration, thickening of the bowel wall and fistula formation. The hallmark is the non-caseating granuloma. Clinical presentation depends upon the site of the inflammation. Pain and diarrhoea are frequent. Extraintestinal manifestations develop in up to 25% of patients and perianal disease is also frequent. The aetiology of Crohn's disease remains unknown. On the host side, genetic factors are important and the immune system is central to the development of the inflammation. Several environmental factors also play a role, in particular smoking. The presence of intestinal luminal contents appears to be essential for the development of Crohn's disease. A number of specific infectious causes have also been proposed, most recently measles virus and M. avium subsp. paratuberculosis. The latter has been considered because of the similarity between BJD and Crohn's disease, although there are also important differences. Evidence suggesting that this agent plays a role includes isolation of the organism from some patients, clustering, and identification by PCR of M.a. paratuberculosis DNA in tissue. However, many other workers have been unable to reproduce these findings. Treatment of Crohn's disease is generally with 5-aminosalicylic acid (5-ASA) compounds, corticosteroids, immunosuppressive agents and antibiotics. The majority of patients with active disease will respond to one or a combination of the therapies. Recently, broad-spectrum antibiotics have been shown to be as effective as oral corticosteroids. The challenge in Crohn's disease remains the prevention of relapse once remission has been achieved. Oral 5-ASA preparations can be beneficial, particularly after surgery. Immunosuppression, particularly with azathioprine or 6-mercaptopurine, is helpful in patients with resistant inflammation. Antibiotics may delay the time to relapse when used for active disease. The use of antimycobacterial therapy directed against M.a. paratuberculosis shows promising results but needs further evaluation. Up to 80% of patients with Crohn's disease will require surgery at some stage in the course of their illness. The challenge remains to try and prevent resection of inflamed intestine and to improve the quality of life of those affected by this disorder.
Descriptors: humans, Crohn's disease, pathogenesis, treatment, digestive tract inflammation, clinical aspects, etiology, hosts, Mycobacterium avium, measles virus, paratuberculosis, polymerase chain reaction, aminosalicylic acid, corticoids, immunosuppressive agents, antibiotics.

Sheridan, Joe M.; Bull, Tim; Sumar, Nazira; Cheng, Jun; Stellakis, Michael; Hermon, Taylor John. Prediction of the structure, function and cellular location of proteins encoded by the GS element, a 'pathogenicity island' in MAP Mycobacterium avium subsp. paratuberculosis. Biochemical Society Transactions. 2000; 28(3): A76. ISSN: 0300-5127. Note: 671st Meeting of the Biochemical Society, England, UK, April 11-13, 2000.
NAL Call No.: QD415.A1B58
Descriptors: bacterial genetics, proteins, cellular locations, functions, vaccines.

Sheridan, Joe M.; Bull, Tim; Sumar, Nazira; Cheng, Jun; Stellakis, Michael; Ford, Jon; Hermon, Taylor John. Prediction of the structure, function and cellular location of proteins encoded by the GS element, a 'pathogenicity island' in Mycobacterium avium subsp. paratuberculosis (MAP). Biochemical Society Transactions. October 2000; 28(5): A234. ISSN: 0300-5127. Note: 18th International Congress of Biochemistry and Molecular Biology, Birmingham, UK, July 16-20, 2000.
NAL Call No.: QD415.A1B58
Descriptors: protein genetics, GS encoded protein, systhesis, immune process, infection, bacterial pathogen.

Singh, N.; Singh, S.V.; Vihan, V.S.; Sood, S.B.  Management practices and Johne's disease incidence in goat herds.  Indian Journal of Animal Sciences.  2000; 70(3): 263-264.  ISSN:  0367-8318.
NAL Call No.:  41.8 IN22
Descriptors:  village goats, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, Barbary breed more susceptible, Jamunapari breed more resistant, prevalence factors, age differences, sex differences, size of herd, culling weak and unthrifty animals as a control measure, Uttar Pradesh, India. 

Singh, S. V.; Singh, P. P.; Singh, N.; Gupta, V. K. Characterization of lipid pattern of Mycobacterium paratuberculosis isolates from goats and sheep. Indian Journal of Animal Sciences. September 2000; 70(9): 899-903. ISSN: 0367-8318.
NAL Call No.: 41.8 IN22
Descriptors: sheep, goats, Mycobacterium avium subsp. paratuberculosis, strain comparison study, patterns, alpha and ketomycolates, methoxy mycolate.

Singh, S.V.; Singh, N.  Mycobacterium paratuberculosis in goats and its diagnosis in India in the new millennium.  Intas Polivet.  2000; 1(2): 190-192.  ISSN:  0972-1738.
Descriptors:  goats, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, characterization, DNA sequences, strain identification, diagnosis, diagnostic techniques, India.

Sockett, D.C. Johne's disease diagnosis and control. Advances in Dairy Technology. 2000; 12: 73-84. ISSN: 1184-0684. Note: Paper presented at the 18th Annual Western Canadian Dairy Seminar held March 7-10, 2000, Red Deer, Alberta.
URL: http://www.afns.ualberta.ca/
NAL Call No.: SF223.W478
Descriptors: dairy cows, Mycobacterium avium subsp. paratuberculosis, Johnes' disease, diagnosis and control.

Stabel, J. R.; Lee, Haa Yung; Kehrli, M. E. Jr. Cytokine secretion and expression in cows infected with Mycobacterium paratuberculosis. FASEB Journal. April 20, 2000; 14(6): A1111. ISSN: 0892-6638. Note: Joint Annual Meeting of the American Association of Immunologists and the Clinical Immunology Society, Seattle, Washington, USA, May 12-16, 2000.
NAL Call No.: QH301.F3
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, IL-1 [interleukin-1], IL-2 [interleukin-2], concanavalin A, cytokine expression and secretion, interferon gamma, tumor necrosis factor.

Stabel, Judith R. Cytokine secretion by peripheral blood mononuclear cells from cows infected with Mycobacterium paratuberculosis. American Journal of Veterinary Research. July 2000; 61(7): 754-760. ISSN: 0002-9645.
NAL Call No.: 41.8 Am3A
Descriptors: cattle, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, cytokine levels, comparison between healthy, subclinical infected and clinically infected cattle, interleukin (IL) IL-1, IL-2, IL-6, tumor necrosis factor (TNF), interferon-gamma (IFN-gamma), post in vitro stimulation of cells with concanavalin A (ConA), lipopolysaccharide (LPS), or a whole cell sonicate of M paratuberculosis (MpS), proliferative responses of PBMC post ConA, phytohemagglutinin, pokeweed mitogen (PWM), or MpS, activated T cells may delay the progression of paratuberculosis.

Stabel, J.R. Johne's disease and milk: do consumers need to worry. Journal of Dairy Science. July 2000; 83(7): 1659-1663. ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Abstract: Mycobacterium paratuberculosis, an acid-fast bacillus that causes enteritis in ruminants, has been suggested as an etiological agent of Crohn's disease in humans. The mode of transmission is unclear; however, some evidence suggests that humans may become infected via contaminated milk. Currently, it is not known whether commercial pasteurization effectively kills M. paratuberculosis in contaminated raw milk. Using a laboratory-scale pasteurizer unit designed to simulate the high-temperature, short-time method (72 degrees C, 15 sec) currently used by commercial dairies, we previously demonstrated that treatment of raw milk inoculated with 10(4) to 10(6) cfu of M. paratuberculosis/ml reduced numbers to an undetectable level. However, M. paratuberculosis is an intracellular pathogen that resides within the macrophages of the host and evades destruction. We subsequently performed further experiments examining heat treatment of milk inoculated with mammary gland macrophages containing ingested M. paratuberculosis. Heat treatment of these samples under high-temperature, short-time conditions demonstrated that the macrophage does not protect the organism because we were unable to recover any viable M. paratuberculosis from the samples. Conversely, other researchers have demonstrated that a residual population of M. paratuberculosis may survive heat treatment of milk. In addition, a recent news report stated that viable M. paratuberculosis organisms have been cultured from retail-ready milk in Ireland. A summary of past and current studies concerning this issue along with a discussion of methodologies used to recover M. paratuberculosis from experimentally inoculated milk will be presented in this paper.
Descriptors: Mycobacterium avium subsp. paratuberculosis, dairy cows, paratuberculosis, contaminated milk, bacterial count, pasteurization processing temperature and duration, milkborne diseases, Crohn's disease, culture media and techniques, disease control, food safety concerns.

Stabel, J.R. Transitions in immune responses to Mycobacterium paratuberculosis. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 465-473. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: The host immune response to infection with Mycobacterium paratuberculosis is paradoxical, with strong cell-mediated immune responses during the early, subclinical stages of infection and strong humoral responses during the late clinical stages of the disease. Cell-mediated immune responses modulated by various T cell subsets are essential to provide protective immunity and prevent progression of the disease. Secretion of cytokines by T cell populations serves to activate macrophages to kill ingested M. paratuberculosis as well as activate other T cell subsets to contain the infection. This paper reviews the current knowledge of T cell immune responses in M. paratuberculosis infection based upon clinical studies and research using mouse models.
Descriptors: Mycobacterium avium subsp. paratuberculosis, host immune response, latent infections, disease course, clinical aspects, T lymphocytes, cytokines, secretion, macrophages, Johne's disease.

Step, D. L.; Streeter, Robert N.; Kirkpatrick, John G. Johne's disease update. Bovine Practitioner. January 2000; 34(1): 6-12. ISSN: 0524-1685.
NAL Call No.: SF779.5.A1B6
Descriptors: cattle, description of the disease, availability of diagnostic tests, control, eradication, reduction of exposure, pathogenesis.

Storset, A. K.; Berntsen, G.; Larsen, H. J. S. Kinetics of IL-2 receptor expression on lymphocyte subsets from goats infected with Mycobacterium avium subsp. paratuberculosis after specific in vitro stimulation. Veterinary Immunology and Immunopathology. November 23, 2000; 77(1-2): 43-54. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
Descriptors: goats, quantification of surface IL-2R expression on activated lymphocytes, flow cytometry, cellular immunity, stimulation with purified protein derivate from Mycobacterium avium subsp. paratuberculosis, gammadelta T cells, CD4+ cells, CD8+ T cells, immune responses.

Stringfellow, D. A.; Givens, M. D. Infectious agents in bovine embryo production: Hazards and solutions. Theriogenology. January 1, 2000; 53(1): 85-94. ISSN: 0093-691X. Note: Proceedings of the Annual Conference of the International Embryo Transfer Society, Maastricht, The Netherlands, January 09-11, 2000.
NAL Call No.: QP251.A1T5
Descriptors: infectious organisms, Haemophilus somnus, Mycobacterium avium subsp. paratuberculosis, Mycoplasma bovigenitalium, Mycoplasma bovis, Ureaplasma diversum, bovine embryos, bovine herpesvirus 1 and 4, rinderpest virus.

Sung, Nackmoon; Collins, Michael T. Effect of three factors in cheese production (pH, salt, and heat) on Mycobacterium avium subsp. paratuberculosis viability. Applied and Environmental Microbiology. April 2000; 66(4): 1334-1339. ISSN: 0099-2240.
NAL Call No.: 448.3 Ap5
Descriptors: kinetics of bacterial pathogen inactivation, 60 day cheese curing process, ATCC strain 19698, Dominic, low pH and NaCl are two factors contributing to the inactivation, the radiometric culture method, heat treatment of raw milk, 60 day curing period will inactivate about 103 cells/ml.

Thorne, S. H.; Norman, E.; McFadden, J. Approaches to genetic manipulation of Mycobacterium paratuberculosis. Abstracts of the General Meeting of the American Society for Microbiology. 2000; 100: 96. ISSN: 1060-2011 Note: 100th General Meeting of the American Society for Microbiology, Los Angeles, California, USA, May 21-25, 2000.
NAL Call No.: QR1.A5
Descriptors: molecular genetics, biotechnology, Mycobacterium avium subsp. paratuberculosis.

Vasavada, P.C.  Mycobacterium paratuberculosis: a potential milkborne pathogen of concern.  Food Testing & Analysis.  2000; 6(2): 20-22.  ISSN: 1084-5984.
NAL Call No.:  TX541.F665
Descriptors:  cattle diseases, Johne’s disease, milkborne diseases, food safety, food contamination, microbial contamination, Crohn's disease, enteritis, disease transmission, pasteurization.

Victoria. Environment and Natural Resources Committee.  Inquiry into the Control of Ovine Johne's Disease in Victoria: Report.  Other title: Control of Ovine Johne's Disease in Victoria Inquiry Report.  The Committee.  Melburne, Vic. [2000]; vi, 348 p., ill., maps.  ISBN: 0731155149.
NAL Call No.:  SF809.P375 I57 2000
Descriptors:  paratuberculosis, prevention, treatment, sheep diseases, Mycobacterium avium subsp. paratuberculosis, Victoria, Australia.

Vitale, F.; Reale, S.; Oliveri, F.; Caracappa, S.  Mutagenesi sito specifica per la generazione di un frammento deleto di IS900 mediante "SOEing-PCR".  [SOEing-PCR, application to generate a delete IS900 fragment.]  Selezione Veterinaria.  2000; (Supp): 1347-1353.  ISSN:  0037-1521.  Note:  In Italian with an English summary.  
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, bovine fecal samples, amplification of 413 bp ifragment inner to IS900 insertion element, PCR techniques, enzyme inhibitors.

Wards, Barry J.; Collins, Desmond M. Slow-growing mycobacteria. Eynard, Natalie; Teissie, Justin [Editors]. Springer Lab Manuals. Electroformation of Bacteria. Springer-Verlag. 2000; 168-174. ISBN: 354066680X.
Descriptors: bacterial pathogen, infection; methods, techniques, molecular genetics, Mycobacterium avium, Mycobacterium bovis, Mycobacterium paratuberculosis, Mycobacterium tuberculosis, microbiology of the listed species.

Weber, A.; Shaefer, Schmidt R.; Fuchs, D.; Weigl, U. Occurrence of Mycobacterium paratuberculosis in faecal samples of cattle in Bavaria. Tieraerztliche Umschau. Feb. 1, 2000; 55(2): 97-99. ISSN: 0049-3864. Note: In German with English and German summaries.
NAL Call No.: 41.8 T445
Descriptors: fecal samples, 1116 cattle, Mycobacterium avium subsp. paratuberculosis, incidence of disease in Austria.

Webster, S.R. The financial consequences of ovine Johne's disease for New South Wales sheep producers. Asian-Australasian Journal of Animal Science. July 2000; 13(Suppl.): 465-468. ISSN: 1011-2367. Note: In the supplement: Animal Production for a Consuming World, vol. C edited by G.M. Stone. Proceedings of the 9th Congress of the Asian-Australasian Association of Animal Production Societies and 23rd Biennial Conference of the Australian Society of Animal Production held July 3-7, 2000, Sydney, Australia.
NAL Call No.: SF55.A78A7
Descriptors: paratuberculosis, Mycobacterium avium subsp. paratuberculosis, sheep disease, economic impact, Johne's disease, Australia.

Wells, S.J. Biosecurity on dairy operations: hazards and risks. Journal of Dairy Science. Oct 2000; 83(10); 2380-2386. ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Descriptors: dairy herds, biosafety, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, risk assessment, disease transmission, disease control, maternal transmission, calves, hygiene, cattle manure, waste disposal, bovine diarrhea virus, disease prevalence, Johne's disease, hazard analysis and critical control point, human heath risks.

Wells, Scott J.; Wagner, Bruce A. Herd-level risk factors for infection with Mycobacterium paratuberculosis in US dairies and association between familiarity of the herd manager with the disease or prior diagnosis of the disease in that herd and use of preventive measures. Journal of the American Veterinary Medical Association. May 1, 2000; 216(9): 1450-1457. ISSN: 0003-1488.
NAL Call No.: 41.8 Am3
Descriptors: herd infection status, Mycobacterium avium subsp. paratuberculosis, management practices, knowledge of herd manager, Johne’s disease, population bases cross-sectional study, 1,004 US dairy operations, questionnaires, blood samples, antibody status, commercial ELISA for testing, multivariable logistic regression analyses, factors associated with infection, some recommendations.

Wentink, G. H.; Frankena, K.; Bosch, J. C.; Vandehoek, J. E. D.; van den Berg, Th. Prevention of disease transmission by semen in cattle. Livestock Production Science. Feb. 2000; 62(3): 207-220. ISSN: 0301-6226.
NAL Call No.: SF1.L5
Descriptors: semen production, bulls, disease surveillance, EU Directive 88/407 prescribes monitoring of bulls in AI stations, screening for many diseases including Mycobacterium avium subsp. paratuberculosis, Johne’s disease, programs.

Whist, S. K.; Storset, A. K.; Larsen, H. J. S. The use of interleukin-2 receptor expression as a marker of cell-mediated immunity in goats experimentally infected with Mycobacterium avium ssp. paratuberculosis. Veterinary Immunology and Immunopathology. March 15, 2000; 73(3-4): 207-218. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
Descriptors: whole blood, method and technique refinement, cell-mediated immune response to paratuberculosis, experimentally infected animals, quantification of interleukin-2 receptor (IL-2R) expression, activated lymphocytes, in vitro stimulation with Mycobacterium avium subsp. paratuberculosis derived purified protein derivative (PPDp).

Whitlock, R.H.; Wells, S.J.; Sweeney, R.W.; Van Tiem, J. ELISA and fecal culture for paratuberculosis (Johne's disease): sensitivity and specificity of each method. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 387-398. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: The sensitivity and specificity of the ELISA and fecal culture tests for paratuberculosis in dairy cattle are examined. ELISA and fecal culture data from seven dairy herds where both fecal cultures and ELISA testing was done concurrently are included. A cohort of 954 cattle including 697 parturient adults, cultured every 6 months from 10 herds followed over 4 years served as the basis to determine fecal culture sensitivity. The fecal culture technique utilized a 2 g sample with centrifugation and double incubation. Of the 954 cattle cohort of all ages (calf to adult) that were fecal sampled on the first herd visit, 79 were culture positive. An additional 131 animals were detected as culture positive over the next seven tests at 6-month intervals. The sensitivity of fecal culture to detect infected cattle on the first sampling was 38%. Of the 697 parturient cattle cohort, 67 were positive on the first fecal culture, while an additional 91 adult cattle were culture positive over the next seven tests, resulting in a sensitivity of 42% on the first culture of the total animals identified as culture positive. Animals culled from the herds prior to being detected as infected and animals always fecal culture negative with culture positive tissues at slaughter are not included in the calculations. Both groups of infected cattle will lower the apparent sensitivity of fecal culture. Infected dairy herds tested concurrently with both fecal culture and ELISA usually resulted in more than twofold positive animals by culture compared to ELISA. The classification of infected cattle by the extent of shedding of Mycobacterium paratuberculosis in the feces helps define the relative proportion of cattle in each group and therefore the likelihood of detection by the ELISA test. ELISA has a higher sensitivity in animals with a heavier bacterial load, i.e. high shedders (75%) compared to low shedders (15%). Repeated testing of infected herds identifies a higher proportion of low shedders which are more likely to be ELISA negative. Thus, the sensitivity of the ELISA test decreases with repeated herd testing over time, since heavy shedders will be culled first from the herds.
Descriptors: dairy cattle, ELISA, paratuberculosis, diagnosis, evaluation, feces, cell cultures, age, disease prevalence, diagnostic techniques, shedding of Mycobacterium, detection, Mycobacterium avium subsp. paratuberculosis.

Whittington, R. J.; Hope, A. F.; Marshall, D. J.; Taragel, C. A.; Marsh, I. Molecular epidemiology of Mycobacterium avium subsp. paratuberculosis: IS900 restriction fragment length polymorphism and IS1311 polymorphism analyses of isolates from animals and a human in Australia. Journal of Clinical Microbiology. September 2000; 38(9): 3240-3248. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: strain distribution and prevalence, 328 isolates, sheep, dairy and beef cattle, goats, alpacas, rhinoceros, humans, Johne’s disease, restriction fragment length polymorphism (RFLP) analysis, genomic DNA, BstEII, 12 IS900 types found, sheep and cattle specific strains, tracing strain dispersion, Australia.

Whittington, R. J.; Reddacliff, L. A.; Marsh, I.; McAllister, S.; Saunders, V. Temporal patterns and quantification of excretion of Mycobacterium avium subsp. paratuberculosis in sheep with Johne's disease. Australian Veterinary Journal. Jan. 2000; 78(1): 34-37. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: Merino sheep, excretion frequency, Johne’s disease, fecal culture for 7 sheep, pen and lab experiments, excretion patterns, possible impact on environmental contamination, multibacillary and paucibacillary cases.

Whittington, R. J.; Fell,S.; Walker, D.; McAllister, S.; Marsh, I.; Sergeant, E.; Taragel, C. A.; Marshall, D. J.; Links, I. J. Use of pooled fecal culture for sensitive and economic detection of Mycobacterium avium subsp. paratuberculosis infection in flocks of sheep. Journal of Clinical Microbiology. July 2000; 38(7): 2550-2556. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: sheep, culturing pooled fecal samples, test sensitivity, multibacillary paratuberculosis, with paucibacillary paratuberculosis, compared to serologic and histopathic examinations, 335 farms, test costs, flock testing.

Wildblood, L. A.; Sinclair, M. C.; Stevenson, K.; Jones, D. G. Effects of in vitro infection with mycobacteria on oxidative metabolism of macrophages. Immunology. December 2000; 101 (Suppl. 1): 125. ISSN: 0019-2805. Note: Annual Congress of the British Society for Immunology, Harrogate, UK, December 05-08, 2000.
NAL Call No.: 448.3 Im6 Suppl.
Descriptors: Mycobacterium avium subsp. paratuberculosis, pathogen, Mycobacterium smegmatis, effects on superoxide.

Wraight, M.D.; McNeil, J.; Beggs, D.S.; Greenall, R.K.; Humphris, T.B.; Irwin, R.J.; Jagoe, S.P.; Jemmeson, A.; Morgan, W.F.; Brightling, P.; Anderson, G.A.; Mansell, P.D. Compliance of Victorian dairy farmers with current calf rearing recommendations for control of Johne's disease. Veterinary Microbiology. Dec 20, 2000; 77(3/4): 429-442. ISSN: 0378-1135. Note: In the special issue: Paratuberculosis (Johne's Disease) edited by R. Chiodini. Paper presented at a colloquium held February 14-18, 1999, Melbourne, Australia.
NAL Call No.: SF601.V44
Abstract: Questionnaires were posted to 800 randomly selected registered Victorian dairy farmers in 1996. Five hundred and thirty-four responses were received and analysed. Johne's disease (JD) had been diagnosed on the farm of 13.2% of respondents in the last 5 years. JD was rated second only to neonatal diarrhoea in importance as a disease of calves, even though other diseases occurred more frequently. However, there was a low level of compliance with JD control recommendations by the respondents. There was no significant difference in the number of JD control recommendations adopted by farmers between the three major Victorian regions. There was a significant difference in compliance between farms having had a diagnosed case of JD and those that had not. Although there is awareness among dairy farmers of the importance of JD, there appears to be a poor implementation of measures by farmers to prevent the spread of the disease. Current JD control recommendations and the method of information transfer to Victorian dairy farms should be reassessed to ensure that dairy heifers are reared with minimal risk of transmission of JD.
Descriptors: dairy cattle, calves, Johne's disease, Mycobacterium avium subsp. paratuberculosis, dairy farms, farmers' attitudes, animal rearing techniques, disease control measures, diagnosis, neonatal diarrhea, geographical variation, incidence, diffusion of information, Victoria, Australia.


Return to Contents

1999

Balci, A. Tulay; Wilbey, R. Andrew. Determination of acid phosphatase activity in heat treated milks by the Fluorophos Test System. International Journal of Dairy Technology. May 1999; 52(2): 56-58. ISSN: 1364-727X.
NAL Call No.: SF221.I58
Descriptors: Fluorophos Test System(R), measurement of acid phosphatase, fruit juices and milk, enhance the destruction of Mycobacterium avium subsp. paratuberculosis.

Bannantine, John P.; Stabel, Judith R. Identification of Mycobacterium paratuberculosis antigens present within infected macrophages. Molecular Biology of the Cell. Nov. 1999; 10 (Suppl. ): 181a. ISSN: 1059-1524. Note: 39th Annual Meeting of the American Society for Cell Biology, Washington, D.C., USA, December 11-15, 1999.
NAL Call No.: QH604.C452
Descriptors: white cells, macrophages, isolation and identification of intracellar bacteria, Johne’s diseases.

Burrells, C.; Clarke, C.J.; Colston, A.; Kay, J.M.; Porter, J.; Little, D.; Sharp, J.M. Interferon-gamma and interleukin-2 release by lymphocytes derived from the blood, mesenteric lymph nodes and intestines of normal sheep and those affected with paratuberculosis (Johne's disease). Veterinary Immunology and Immunopathology. May 1999; 68(2/4): 139-148. ISSN: 0165-2427.
URL:  http://www.sciencedirect.com/science?_ob=JournalURL&_cdi=5189&_auth=y&_acct=C000052423&_version=1&_urlVersion=0&_userid=4250348&md5=f5f60e05fe0e447c7311059c14754776
NAL Call No.: SF757.2.V38
Descriptors: sheep, paratuberculosis, interferon, interleukin-2, lymphocytes, lymph nodes, intestines, cytokines, Mycobacterium paratuberculosis, lesions, major histocompatibility complex, cd4+ lymphocytes, Mycobacterium avium subsp. paratuberculosis.

Cobb, Alison J.; Frothingham, Richard. The GroES antigens of Mycobacterium avium and Mycobacterium paratuberculosis. Veterinary Microbiology. June 1, 1999; 67(1): 31-35. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: similarities and differences between species, possible vaccine agent, Mycobacterium avium subsp. paratuberculosis.

Crabb, J.H.; Sweeney, R.W.; Cressman, H.; McAdams, S.; Whitlock, R.H.  New rapid diagnostic test for Johne's disease in cattle.  Proceedings of the Annual Conference of the American Association of Bovine Practitioners Conference.  1999; (32): 247-249.  Note:  Meeting held Sept. 23-26, 1999, Nashville, Tennessee.
NAL Call No.:  SF961.A5
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis, diagnostic techniques.

Dei, R.; Tortoli, E.; Bartoloni, A.; Simonetti, M. T.; Lillini, E. HPLC does not differentiate Mycobacterium paratuberculosis from Mycobacterium avium. Veterinary Microbiology. March 12, 1999; 65(3): 209-213. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: testing of isolates, potential detection method, no significant differences.

Dotta, U.; Guglielmino, R.; Cagnasso, A.; D' Angelo, A.; Prato, S.; Bosso, M. Effects of subclinical bovine paratuberculosis on in-vitro polymorphonuclear neutrophil migration. Journal of Comparative Pathology. Nov. 1999; 121(4): 399-403. ISSN: 0021-9975.
NAL Call No.: 41.8 J82
Descriptors: white blood cells, neutrophils, subclinical infection, blood picture, Mycobacterium avium subsp. paratuberculosis.

Driemeier, David; Farias, Cruz Claudio Estevao; Pereira, Gomes Marcos Jose; Corbellini, Luis Gustavo; Loretti, Alexandre Paulino; Colodel, Edson Moleta. Clinical and pathological aspects of bovine paratuberculosis in Rio Grande do Sul, southern Brazil. Pesquisa Veterinaria Brasileira. July-Dec. 1999; 19(3-4): 109-115. ISSN: 0100-736X. Note: In Portuguese with English and Portuguese summaries.
NAL Call No.: SF756.37.B7 P5
Descriptors: dairy herd, clinical signs, cattle, necropsy findings described, Mycobacterium avium subsp. paratuberculosis cultured in Herrold's medium enriched with mycobactin, many tissues cultured.

El Zaatari, Fouad A. K.; Naser, Saleh A.; Hulten, Kristina; Burch, Paula; Graham, David Y. Characterization of Mycobacterium paratuberculosis p36 antigen and its seroreactivities in Crohn's disease. Current Microbiology. Aug. 1999; 39(2): 115-119. ISSN: 0343-8651.
NAL Call No.: QR1.C78
Descriptors: possible zoonotic relationships between Johne’s and Crohn’s, immunoblotting technique, reactivity of human sera from patients with Crohn’s indicates Mycobacteria may be involved.

Ellingson, Jay L. E.; Stabel, Judith R. Species-specific genetic identification of Mycobacterium paratuberculosis. Official Gazette of the United States Patent and Trademark Office Patents. [e-file] Nov. 16, 1999; 1228(3): No pagination. ISSN: 0098-113.
NAL Call No.: T223.A21
Abstract: An M. paratuberculosis gene referred to as hspX provides a useful target region for the construction of suitable probes and primers that are species-specific for distinguishing M. paratuberculosis from related mycobacteria in a test sample. M. paratuberculosis is the causative agent of Johne's disease and has been isolated from human patients with Crohn's disease.
Descriptors: hspX gene, possible species specific probes and primers, strain differentiation, Johne’s disease agent, Crohn’s disease, Mycobacterium avium subsp. paratuberculosis.

Elrod, C.C.  Mycobacterium paratuberculosis: worse than the Y2K bug.  Proceedings Cornell Nutrition Conference for Feed Manufacturers.  1999; (61): 128-132.  ISSN: 0885-7687.
NAL Call No.:  389.79 C81
Descriptors:  Mycobacterium avium subsp. paratuberculosis, mycobacterial diseases, disease course, disease transmission, disease control, herd health status, zoonoses, cattle, Johne’s disease. 

Englund, Stina; Ballagi, Pordany, Andras; Bolske, Goran; Johansson, Karl Erik. Single PCR and nested PCR with a mimic molecule for detection of Mycobacterium avium subsp. paratuberculosis. Diagnostic Microbiology and Infectious Disease. March 1999; 33(3): 163-171. ISSN: 0732-8893.
Descriptors: detection method, nested PCR based on IS900 plus an internal control molecule, to confirm growth, bovine tissues, primary bacterial cultures, considered a useful screening tool.

Feola, R. P.; Collins, M. T.; Czuprynski, C. J. Hormonal modulation of phagocytosis and intracellular growth of Mycobacterium avium ss. paratuberculosis in bovine peripheral blood monocytes. Microbial Pathogenesis. Jan. 1999; 26(1): 1-11. ISSN: 0882-4010.
NAL Call No.: QR175.M53
Descriptors: growth hormone, prolactin, vitamin D3, luteinizing hormone, oxytocin, hormone effects on phagocytosis and intracellular survival, bovine peripheral blood monocytes, intracellular bacillary growth, Mycobacterium avium subsp. paratuberculosis.

Freeman, Roger; Magee, John; Barratt, Anne; Wheeler, Janice; Steward, Michael; Lee, Maureen; Piggott, Nigel; Grobusch, Martin P. Rapid immunochromatographic assay for diagnosis of tuberculosis: Antibodies detected may not be specific. Journal of Clinical Microbiology. June 1999; 37(6): 2111-2112. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: Mycobacterium africanum, Mycobacterium avium, Mycobacterium bovis, Mycobacterium chelonei, Mycobacterium fortuitum, Mycobacterium kansasii, Mycobacterium leprae, Mycobacterium marinum, Mycobacterium microti, Mycobacterium paratuberculosis, Mycobacterium smegmatis, Mycobacterium tuberculosis, Mycobacterium vaccae, Mycobacterium avium subsp. paratuberculosis, 38 kilodalton antigen.

Garry, F.  Producers need to know facts about Johne's disease.  Feedstuffs.  1999; 71(19): 12-15.  ISSN: 0014-9624.
NAL Call No.:  286.81 F322
Descriptors:  dairy cattle, Mycobacterium avium subsp. paratuberculosis, disease control, disease prevention.

Gasteiner, J.; Wenzl, H.; Fuchs, K.; Jark, U.; Baumgartner, W. Serological cross-sectional study of paratuberculosis in cattle in Austria. Journal of Veterinary Medicine Series B. Sept. 1999; 46(7): 457-466. ISSN: 0931-1793.
NAL Call No.: 41.8 Z52
Descriptors: 11,028 cattle, 2757 farms, prevalence of serum antibodies, Mycobacterium avium subsp. paratuberculosis, epidemiological study, ELISA (Allied Monitors), 6 year old Holstein Frisian cattle, various regional differences, Austria.

Gilot, Philippe; Coetsier, C. Specificity of the 34-kilodalton immunodominant protein of Mycobacterium avium subsp. paratuberculosis (and reply). Clinical and Diagnostic Laboratory Immunology. Jan. 1999; 6(1): 146-148. ISSN: 1071-412X.
Descriptors: bacterial protein, specificity, Mycobacterium avium subsp. paratuberculosis.

Grant, I. R.; Ball, H. J.; Rowe, M. T. Effect of higher pasteurization temperatures, and longer holding times at 72 degree C, on the inactivation of Mycobacterium paratuberculosis in milk. Letters in Applied Microbiology. June 1999; 28(6): 461-465. ISSN: 0266-8254.
NAL Call No.: QR1.L47
Descriptors: raw milk, inoculated with 3 strains of Mycobacterium avium subsp. paratuberculosis, NCTC 8578, B2 and DVL 943 various heat treatments, survivability.

Greig, Alastair; Stevenson, Karen; Henderson, Dennis; Perez, Valentin; Hughes, Valerie; Pavlik, Ivo; Hines, Murray E. II; McKendrick, Iain; Sharp, J. Michael. Epidemiological study of paratuberculosis in wild rabbits in Scotland. Journal of Clinical Microbiology. June 1999; 37(6): 1746-1751. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: prevalence, 22 farms, rabbits as vectors, cattle and rabbit disease interactions, molecular genetic typing looking for strain differences, interspecies transmission, epidemiology, wildlife a reservoirs and vectors.

Gyimesi, Zoltan S.; Stalis, Ilse H.; Miller, Janice M.; Thoen, Charles O. Detection of Mycobacterium avium subspecies avium in formalin-fixed, paraffin-embedded tissues of captive exotic birds using polymerase chain reaction. Journal of Zoo and Wildlife Medicine. Sept. 1999; 30(3): 348-353. ISSN: 1042-7260.
NAL Call No.: SF601 J6
Descriptors: methods, techniques, Mycobacterium avium subsp. paratuberculosis, avian tuberculosis, diagnostic study, formalin fixed, paraffin embedded archival avian tissues, testing by polymerase chain reaction (PCR), reliability, diagnostic value of test.

Hajtos, Istvan; Glavits, Robert; Malik, Galal. Paratuberculosis in Northern Hungarian sheep flocks. Magyar Allatorvosok Lapja. July 1999; 121(7): 383-390. ISSN: 0025-004X. Note: In Hungarian with English and Hungarian summaries.
NAL Call No.: 41.8 V644
Descriptors: Hungarian Merino sheep, 5 flocks, occurrence of Johne’s disease, clinical and on the spot examinations, clinical signs, histology findings, ileum, mesenterial lymph nodes, smear samples of ileal mucosa, Mycobacterium avium subsp. paratuberculosis, etiology, pathology.

Harris, N. Beth; Feng, Zhengyu; Liu, Xiaofei; Cirillo, Suat L. G.; Cirillo, Jeffrey D.; Barletta, Raul G. Development of a transposon mutagenesis system for Mycobacterium avium subsp. paratuberculosis. FEMS Microbiology Letters. June 1, 1999; 175(1): 21-26. ISSN: 0378-1097.
NAL Call No.: QR1.F44
Abstract:  Mycobacterium avium subspecies paratuberculosis, a slow-growing Mycobacterium, is the causative agent of Johne's disease. Although M. paratuberculosis is difficult to manipulate genetically, our laboratory has recently demonstrated the ability to introduce DNA into these bacteria by transformation and phage infection. In the current study we develop the first transposon mutagenesis system for M. paratuberculosis using the conditionally replicating mycobacteriophage phAE94 to introduce the mycobacterial transposon Tn5367. Southern blotting and sequence analysis demonstrated that the transposon insertion sites are distributed relatively randomly throughout the M. paratuberculosis genome. We constructed a comprehensive bank of 5620 insertion mutants using this transposon. The transposition frequency obtained using this delivery system was 1.0 x 10(-6) transposition events per recipient cell. Auxotrophic mutants were observed in this library at a frequency of 0.3%.
Descriptors: methods to introduce DNA into bacteria, transformation and phage infection, first transposon mutagenesis system, conditionally replicating mycobacteriophage phAE94, insertion sites, 5620 insertion mutants.

Harris, N. B.; Liu, X.; Cirillo, J. D.; Barletta, R. G. Transposon mutagenesis of Mycobacterium paratuberculosis. Abstracts of the General Meeting of the American Society for Microbiology. 1999; 99: 650. ISSN: 1060-2011. Note: 99th General Meeting of the American Society for Microbiology, Chicago, Illinois, USA, May 30-June 3, 1999.
NAL Call No.: QR1.A5
Descriptors: Mycobacterium avium subsp. paratuberculosis, Tn5367 transposon, bacteriophage mediated delivery, aph gene mutation.

Hermon, Taylor J.; Cheng, J.; Bull, T. Mycobacterium avium subsp. paratuberculosis in milk: An animal and human pathogen. Journal of Microbiological Methods. Nov. 1999; 38(3): 217. ISSN: 0167-7012. Note: European Meeting on Molecular Diagnostics, Scheveningen, The Hague, Netherlands, October 13-16, 1999.
NAL Call No.: QR65.J68
Descriptors: milk, dairy products, zoonotic disease, food contaminant, description of biology, issues and concerns.

Higgins, R. Infections of uncertain zoonotic origin. Medecin Veterinaire du Quebec. 1999; 29(1): 29-35. ISSN: 0225-9591. Note: In French.
NAL Call No.: SF602.M8
Descriptors: dogs, humans, pigs, various diseases including, Mycobacterium paratuberculosis.

Hubbard, James; Surawicz, Christina M. Etiological role of Mycobacterium in Crohn's disease: An assessment of the literature. Digestive Diseases. 1999; 17(1): 6-13. ISSN: 0257-2753.
Descriptors: Mycobacterium chelonae, Mycobacterium paratuberculosis, etiological role, pathogens, humans, possible zoonotic disease.

Johnson, Ifearulundu Yvette; Kaneene, John B. Distribution and environmental risk factors for paratuberculosis in dairy cattle herds in Michigan. American Journal of Veterinary Research. May 1999; 60(5): 589-596. ISSN: 0002-9645.
NAL Call No.: 41.8 Am3A
Descriptors: 3,886 dairy cattle tested, herds, soil risk factors, epidemiology of infection, pH, iron content, lime addition, pastures, exercise lots, questionnaire on management practices, productivity levels, Michigan.

Johnson, Ifearulundu Yvette; Kaneene, John B.; Lloyd, James W. Herd-level economic analysis of the impact of paratuberculosis on dairy herds. Journal of the American Veterinary Medical Association. March 15, 1999; 214(6): 822-825. ISSN: 0003-1488.
NAL Call No.: 41.8 Am3
Descriptors: herd level analysis, economic losses, dairy cattle, herds, Mycobacterium avium subsp. paratuberculosis, cross-sectional study design, sample population, a multistage stratified random sample of 121 dairy herds, questionnaires were filled out regarding management practices, herd productivity, labor use, expenditures, blood sampling, Michigan.

Marsh, I.; Whittington R.; Cousins, D. PCR-restriction endonuclease analysis for identification and strain typing of Mycobacterium avium subsp. paratuberculosis and Mycobacterium avium subsp. avium based on polymorphisms in IS1311. Molecular and Cellular Probes. April 1999; 13(2): 115-126. ISSN: 0890-8508.
NAL Call No.: RB43.7.M63
Descriptors: cattle, sheep, DNA, Mycobacterium avium, IS1311 gene, IS900 gene, Mycobacterium avium avium, Mycobacterium avium subsp. paratuberculosis, possible diagnostic agent, restriction endonuclease analysis products interpretation.

McDonald, W. L.; Ridge, S. E.; Hope, A. F.; Condron, R. J. Evaluation of diagnostic tests for Johne's disease in young cattle. Australian Veterinary Journal. Feb. 1999; 77(2): 113-119. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: development of immune responses, calves, oral dosing for experimental infection, Mycobacterium avium subsp. paratuberculosis, natural infection, evaluation of potential diagnostic tests, testing fecal shedding, Johne’s disease, difficulties in diagnosis.

Moreira, Ana Rita; Paolicchi, Fernando; Morsella, Claudia; Zumarraga, Martin; Cataldi, Angel; Fabiana, Bigi; Alicia, Alito; Piet, Overduin; van Soolingen, Dick; Maria, Isabel Romano. Distribution of IS900 restriction fragment length polymorphism types among animal Mycobacterium avium subsp. paratuberculosis isolates from Argentina and Europe. Veterinary Microbiology. Dec. 1999; 70(3-4): 251-259. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: cattle and deer isolates, 61 isolates, 4 different patterns, BstII digests of genomic DNA, patterns described, Argentina.

Murray, Alan; Gheorghiu, Marin; Gicquel, Brigitte. Promoter of M. paratuberculosis and its use for the expression of immunogenic sequences. Official Gazette of the United States Patent and Trademark Office Patents. [e-file] Oct. 19, 1999; 1227(3): No pagination. ISSN: 0098-1133.
NAL Call No.: T223.A21
Abstract: The invention relates to a nucleotide sequence which is present at a position adjacent to the 5' end of the reverse sequence complementary to the open reading frame coding for a potential transposase contained in the insertion element IS900 in Mycobacterium paratuberculosis. The nucleotide sequence has promoter functions and contains important signals for the regulation of transcription and translation. The invention also relates to methods for cloning and expressing heterologous proteins using such regulatory sequences, to vectors and transformed host cells containing these sequences, and to immunogenic compositions prepared by expression of nucleotide sequences placed under control of these regulatory sequences.
Descriptors: bacterial genetics, Mycobacterium avium subsp. paratuberculosis, promoter functions, regulation of transcription and translation.

Naser, S.; Fenster, W.; Romero, C.; Schwartz, D.; Campbell, D.; Piromalli, C.; Shafran, I. In vitro evaluation of anti-tuberculosis drugs against Mycobacterium avium ss. paratuberculosis for treatment of Crohn's disease. Gastroenterology. April 1999; 116(4 Pt. 2): A783. ISSN: 0016-5085. Note: Digestive Disease Week and the 100th Annual Meeting of the American Gastroenterological Association, Orlando, Florida, USA, May 16-19, 1999.
NAL Call No.: RC799.G37
Descriptors: Mycobacterium avium subsp. paratuberculosis, susceptibility to antibiotics, clarithromycin, ethambutol, isoniazid, kanamycin, pyrazinamide, rifampicin, streptomycin.

Naser, Saleh; Shafran, Ira; El Zaatari, Fouad. Mycobacterium avium subsp. paratuberculosis in Crohn's disease is serologically positive. Clinical and Diagnostic Laboratory Immunology. March 1999; 6(2): 282. ISSN: 1071-412X.
Descriptors: human, Mycobacterium avium subsp. paratuberculosis, Mycobacterium bovis, detection.

Ott, Stephen L.; Wells, Scott J.; Wagner, Bruce A. Herd-level economic losses associated with Johne's disease on US dairy operations. Preventive Veterinary Medicine. June 11, 1999; 40(3-4): 179-192. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: USDA National Animal Health Monitoring System's (NAHMS), dairy cattle study, economic losses, Mycobacterium avium subsp. paratuberculosis, high prevalence herds, milk reductions, culling cows, losses of $200-250 million annually.

Pavlik, Ivo; Horvathova, Alica; Dvorska, Lenka; Bartl, Jiri; Svastova, Petra; du Maine, Robin; Rychlik, Ivan. Standardisation of restriction fragment length polymorphism analysis for Mycobacterium avium subspecies paratuberculosis. Journal of Microbiological Methods. Oct. 1999; 38(1-2): 155-167. ISSN: 0167-7012.
NAL Call No.: QR65.J68
Descriptors: DNA, 1008 strains, digestion with PstI and BstII, hybridized with standard IS900 probe, DNA fingerprints, GelCompar, 13 fragment length polymorphisms.

Puyang, Xiaoling; Lee, Karen; Pawlichuk, Corey; Kunimoto, Dennis Y. IS1626, a new IS900-related Mycobacterium avium insertion sequence. Microbiology. Nov. 1999; 145(11): 3163-3168. ISSN: 1350-0872.
NAL Call No.: QR1.J64
Nucleotide Sequence: AF071067 GenBank, amino acid nucleotide sequence.
Descriptors: bacterial identifying genetics, high-stringency hybridization with the pMB22/S12 probe from IS900 of Mycobacterium avium subsp. paratuberculosis, 3 clones.

Reichel, Michael P.; Kittelberger, Reinhold; Penrose, Mary E.; Meynell, Robyn M.; Cousins, Debby; Ellis, Trevor; Mutharia, Lucy M.; Sugden, Edward A.; Johns, Andrea H.; de Lisle, Geoffrey W. Comparison of serological tests and faecal culture for the detection of Mycobacterium avium subsp. paratuberculosis infection in cattle and analysis of the antigens involved. Veterinary Microbiology. April 1, 1999; 66(2): 135-150. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: cattle, 341 sera samples,106 fecal samples, assay evaluation, ELISA, complement fixation test, detection assay, comparison study.

Sinclair, M. C.; Wildblood, L. A.; Stevenson, K.; Jones, D. G. Cytokine mRNA production in ovine alveolar macrophages infected with mycobacteria. Immunology. Dec. 1999; 98 (Suppl. 1): 52. ISSN: 0019-2805. Note: Joint Congress of the British Society for Immunology and the British Society for Allergy & Clinical Immunology, Harrogate, England, UK, November 30-December 03, 1999.
NAL Call No.: 448.3 Im6 Suppl.
Descriptors: infection with Mycobacterium avium subsp. paratuberculosis, cytokines.

Sinclair, M. C.; Wildblood, L. A.; Stevenson, K.; Beard, P.; Sharp, J. M.; Hopkins, J.; Jones, D. G. The initial T-cell and cytokine profile of lambs experimentally infected with mycobacteria. Immunology. Dec. 1999; 98(Suppl. 1): 52. ISSN: 0019-2805. Note: Joint Congress of the British Society for Immunology and the British Society for Allergy & Clinical Immunology, Harrogate, England, UK, November 30-December 03, 1999.
NAL Call No.: 448.3 Im6 Suppl.
Descriptors: sheep, lambs, Mycobacterium infection, cytokines, white cell profiles, experimental infection.

Suenaga, Kensuke; Yokoyama, Yuichi; Nishimori, Isao; Sano, Shuichi; Morita, Masanori; Okazaki, Kazuichi; Onishi, Saburo. Serum antibodies to Mycobacterium paratuberculosis in patients with Crohn's disease. Digestive Diseases and Sciences. June 1999; 44(6): 1202-1207. ISSN: 0163-2116.
NAL Call No.: 448.8 Am324
Descriptors: immunology, humans with Crohn’s disease, serum antibodies, IgG, IgA, IgM, ELISA assay on sera, unique response to immune response to Mycobacterium avium subsp. paratuberculosis in patients with Crohn’s.

United States.  Animal and Plant Health Inspection Service. Veterinary Services. Centers for Epidemiology and Animal Health.  National Animal Health Monitoring System (U.S.).  What Do I Need to Know About Johne's Disease in Beef Cattle.  APHIS Veterinary Services Info Sheet.  [1999]; 1 folded sheet (4 p.), ill.  Note:  Caption title.  "Centers for Epidemiology and Animal Health, USDA:APHIS:VS, attn. NAHMS" p. [4]. "August 1999."  "N309.899" p. [4].
URL:  http://www.aphis.usda.gov/vs/ceah/cnahs/nahms/beefcowcalf/Beef97/bf97john.pdf
NAL Call No.:  aSF967.P33 W43 1999
Descriptors:  overview of the disease, symptoms, control factors, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, United States.

Valentin, Weigand Peter; Goethe, Ralph. Pathogenesis of Mycobacterium avium subsp. paratuberculosis infections in ruminants: Still more questions than answers. Microbes and Infection. Nov. 1999; 1(13): 1121-1127. ISSN: 1286-4579. Note: A review.
NAL Call No.: QR180 M53
Descriptors: Johne’s disease, pathogenesis, chronic enteritis of ruminants, biology of infection and host interaction are unknown.

Waters, W. R.; Stabel, J. R.; Sacco, R. E.; Harp, J. A.; Pesch, B. A.; Wannemuehler, M. J. Antigen-specific B-cell unresponsiveness induced by chronic Mycobacterium avium subsp. paratuberculosis infection of cattle. Infection and Immunity. April 1999; 67(4): 1593-1598. ISSN: 0019-9567
NAL Call No.: QR1.I57
Abstract:  Mycobacterium avium subsp. paratuberculosis infection of cattle results in a chronic granulomatous enteritis. Clinical disease (i.e. cachexia, diarrhea and high fecal bacterial counts) is preceded by a lengthy subclinical stage of disease. The immunologic mechanisms associated with the progression of infected cattle from subclinical to clinical disease are unclear. In this study, a cell proliferation assay was used in combination with flow cytometry to compare peripheral blood lymphocyte responses of cattle with subclinical paratuberculosis to responses of cattle with clinical paratuberculosis. B cells from cattle with subclinical disease proliferated vigorously upon stimulation with M. avium subsp. paratuberculosis antigen, with up to 12.4% of the total B cells responding. However, B cells from cattle with clinical disease did not proliferate upon antigen stimulation despite good proliferation in response to concanavalin A stimulation. In addition, these animals had high percentages of peripheral blood B cells. B cells from noninfected animals did not proliferate upon M. avium subsp. paratuberculosis antigen stimulation. Thus, it appears that B-cell proliferation is a sensitive indicator of subclinical Johne's disease. Furthermore, the immunologic mechanisms responsible for the antigen-specific unresponsiveness of peripheral blood B cells may be significant in the eventual progression from subclinical to clinical Johne's disease in cattle.
Descriptors: cattle, Johne’s disease, description of progression of disease from subclinical to clinical states, immunology associated with progression, cell proliferation assay, flow cytometry, peripheral blood lymphocyte responses, B cells, antigen stimulation.

Whittington, R. J.; Reddacliff, L.; Marsh, I.; Saunders, V. Detection of Mycobacterium avium subsp. paratuberculosis in formalin-fixed paraffin-embedded intestinal tissue by IS900 polymerase chain reaction. Australian Veterinary Journal. June 1999; 77(6): 392-397. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: evaluation, comparison study, DNA extraction methods, formalin-fixed, paraffin-embedded tissues, detection of Mycobacterium avium subsp. paratuberculosis by IS900 PCR, disease confirmation, ruminants, experimental laboratory study, three DNA extraction methods used.

Whittington, R. J.; Marsh, I.; McAllister, S.; Turner, M. J.; Marshall, D. J.; Fraser, C. A. Evaluation of modified BACTEC 12B radiometric medium and solid media for culture of Mycobacterium avium subsp. paratuberculosis from sheep. Journal of Clinical Microbiology. April 1999; 37(4): 1077-1083. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: diagnosis, evaluate the culture of Mycobacterium avium subsp. paratuberculosis, sheep, modified BACTEC 12B radiometric medium, sensitivity of culture, histopathology, evaluate a range of solid media.

Williams, Stephanie L.; Harris, N. Beth; Barletta, Raul G. Development of a firefly luciferase-based assay for determining antimicrobial susceptibility of Mycobacterium avium subsp. paratuberculosis. Journal of Clinical Microbiology. Feb. 1999; 37(2): 304-309. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: evaluation of antimicrobial agents, Mycobacterium avium subsp. paratuberculosis, firefly luciferase-based assay, determining drug susceptibilities, amikacin, clarithromycin, ethambutol, isoniazid, kanamycin, rifabutin, D-cycloserine, suggested drug therapy combinations.

Zhao, Ben Yang; Czuprynski, Charles J.; Collins, Michael T. Intracellular fate of Mycobacterium avium subsp. paratuberculosis in monocytes from normal and infected, interferon-responsive cows as determined by a radiometric method. Canadian Journal of Veterinary Research. Jan. 1999; 63(1): 56-61. ISSN: 0830-9000. Note: In English with English and French summaries.
NAL Call No.: SF601.C24
Descriptors: comparison study, bovine monocytes, normal and infected cows, strong Th1-like cellular immune response to ingest and inhibit the intracellular growth, radiometric (BACTEC) culture, standard plate counting, microscopic counting of acid-fast stained monocyte monolayers.

Zimmer, K.; Drager, K.G.; Klawonn, W.; Hess, R.G. Contribution to the diagnosis of Johne's disease in cattle. Comparative studies on the validity of Ziehl-Neelsen staining, faecal culture and a commercially available DNA-probe test in detecting Mycobacterium paratuberculosis in faeces from cattle. Journal of Veterinary Medicine. Mar 1999; 46(2): 137-140. ISSN: 0931-1793.
NAL Call No.: 41.8 Z52
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, feces, diagnosis, paratuberculosis, experimental infection, diagnostic techniques, asymptomatic infections.

Zimpernik, I.; Awad, Masalmeh M.; Baumgartner, W. M. avium subspecies paratuberculosis strains isolated from ruminants in Austria. Tieraerztliche Umschau. June 1, 1999; 54(6): 335-338. ISSN: 0049-3864. Note: In German with English and German summaries.
NAL Call No.: 41.8 T445
Descriptors: pathogen survey, intestinal contents, intestines, lymph nodes, cattle, sheep, ruminants, 10 base oligonucleotides, 5 different DNA fingerprints, Mycobacterium avium subsp. paratuberculosis, Austria.


Return to Contents

1998

Bartley, C. B.; Sweeney, M. T.; Plaunt, M. R. Growth and detection of Mycobacteria paratuberculosis in the ESP Culture System II. Abstracts of the General Meeting of the American Society for Microbiology. 1998; 98: 507. ISSN: 1060-2011. Note: 98th General Meeting of the American Society for Microbiology, Atlanta, Georgia, USA, May 17-21, 1998.
NAL Call No.: QR1.A5
Descriptors: bacterial culture, methodologies, Mycobacterium avium subsp. paratuberculosis.

Begara, Mcgorum I.; Wildblood, L. A.; Clarke, C. J.; Connor, K. M.; Stevenson, K.; McInnes, C. J.; Sharp, J. M.; Jones, D. G. Early immunopathological events in experimental ovine paratuberculosis. Veterinary Immunology and Immunopathology. May 29, 1998; 63(3): 265-287. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
Descriptors: sheep, experimental oral infection, less than 2 week old lambs, neonatal, cervine isolate, Mycobacterium avium subsp. paratuberculosis, investigation of bacteriological, histopathological and immunological changes up to 8 weeks of age, focal granuloma in Jejunal and ileal Peyer’s patches, CD8+ and CD2+ lymphocyte numbers.

Bewley, J. Controlling Johne's disease in dairy cattle. Journal of Dairy Science. 1998; 81(Suppl. 1): 380. ISSN: 0022-0302. Note: Joint Meeting of the American Dairy Science Association and the American Society of Animal Science, Denver, Colorado, USA, July 28-31, 1998.
NAL Call No.: SF221 A4
Descriptors: dairy cattle, Mycobacterium avium subsp. paratuberculosis, disease prevention and control, management and husbandry systems.

Billard, Patrick; Dubow, Michael S. Bioluminescence-based assays for detection and characterization of bacteria and chemicals in clinical laboratories. Clinical Biochemistry. Feb. 1998; 31(1): 1-14. ISSN: 0009-9120.
NAL Call No.: RB40.C6
Descriptors: application of bioluminescence, usefulness of bacterial (lux) and eucaryotic (luc) luciferase genes, examples of value as "reporters" of many endpoints, various enteric pathogenic organisms, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, Mycobacterium tuberculosis.

Brooks, A. Quality of UK milk to be studied. British Medical Journal BMJ. Aug. 22, 1998; 317(7157): 491. ISSN: 0959-8138.
Descriptors: possible link between Mycobacterium avium subsp. paratuberculosis and Crohn's disease, study on microbial content of milk, United Kingdom.

Bull, T. J.; Tizard, M.; Martin, H.; Millar, D.; Doran, T.; Hermon, Taylor J. The GS element in Mycobacterium avium ss. paratuberculosis: A mycobacterial pathogenicity island. Abstracts of the General Meeting of the American Society for Microbiology. 1998; 98: 509. ISSN: 1060-2011. Note: 98th General Meeting of the American Society for Microbiology, Atlanta, Georgia, USA, May 17-21, 1998.
NAL Call No.: QR1.A5
Descriptors: virulence associated gene, GS element, pathogenic bacteria, Mycobacterium avium subsp. paratuberculosis, Johne's disease.

Burrells, C.; Clarke, C.J.; Colston, A.; Kay, J.M.; Porter, J.; Little, D.; Sharp, J.M. A study of immunological responses of sheep clinically-affected with paratuberculosis (Johne's disease). The relationship of blood, mesenteric lymph node and intestinal lymphocyte responses to gross and microscopic pathology. Veterinary and Immunology and Immunopathology. Dec 11, 1998; 66(3/4): 343-358. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
Descriptors: sheep, paratuberculosis, immune response, blood, lymph nodes, intestines, lymphocytes, pathology, infections, Mycobacterium paratuberculosis, bacterial proteins, feces, polymerase chain reaction, identification, Mycobacterium avium subsp. paratuberculosis, Mycobacterium avium subsp. silvaticum, Johne's disease.

Carbonell, P.  Histopathological diagnosis of Johne's disease.  Australian Veterinary Journal. 1998; 76(7) 499.  ISSN: 0005-0423.
URL:  http://www.ava.com.au/avjpast.php?journalid=9&plink=avj03.htm
NAL Call No.:  41.8 AU72
Descriptors:  cattle, sheep, Mycobacterium avium subsp. paratuberculosis, paratuberculosis, histopathology, diagnostic techniques.

Cetinkaya, B.; Erdogan, H.M.; Morgan, K.L.  Prevalence, incidence and geographical distribution of Johne's disease in cattle in England and the Welsh borders.  Veterinary Record.  1998; 43(10): 265-269.  ISSN: 0042-4900.
URL:  http://veterinaryrecord.bvapublications.com/
NAL Call No.:  41.8 V641
Descriptors:  dairy cattle, dairy herds, Mycobacterium avium subsp. paratuberculosis, disease prevalence, incidence, geographical distribution, farm surveys, livestock numbers, vaccination, England, Wales.

Choy, E.; Whittington, R. J.; Marsh, I.; Marshall, J.; Campbell, M. T. A method for purification and characterisation of Mycobacterium avium subsp. paratuberculosis from the intestinal mucosa of sheep with Johne's disease. Veterinary Microbiology. Nov. 1998; 64(1): 51-60. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: methodology, purification, Mycobacterium avium subsp. paratuberculosis, sheep intestinal mucosa, multibacillary Johne's disease, restriction fragment length polymorphism (RFLP) analysis, epidemiology.

Coetsier, Christophe; Havaux, Xavier; Mattelard, Francois; Sadatte, Sanaa; Cormont, Francoise; Buergelt, Klaus; Limbourg, Bernard; Latinne, Dominique; Bazin, Herve; Denef, Jean Francois; Cocito, Carlo. Detection of Mycobacterium avium subsp. paratuberculosis in infected tissues by new species-specific immunohistological procedures. Clinical and Diagnostic Laboratory Immunology. July 1998; 5(4): 446-451. ISSN: 1071-412X.
Descriptors: preparation of polyclonal and monoclonal antibodies, a 362 recombinant polypeptide with B cell epitopes, immunoglobins for histopathological diagnosis, Johne's disease, more sensitive than Ziehl-Neelsen staining.

Collins, M.T.; Manning, E.J.B.  Eradication of Johne's disease from a heavily infected herd in 12 months.  Proceedings of the Annual Conference of the American Association of Bovine Practioners Conference.  1998; (31): 241-244.  Note:  Meeting held Sept. 24-26, 1998, Spokane, Washington.
NAL Call No.:  SF961.A5
Descriptors:  cattle, Mycobacterium avium subsp. paratuberculosis infected herd, disease control, disease eradication.

Ellingson, J. L. E.; Stabel, J. R.; Bishai, W. R.; Frothingham, R.; Miller, J. M. Evaluation of the repeatability and accuracy of a polymerase chain reaction method for identification of strains of the Mycobacterium avium complex. Abstracts of the General Meeting of the American Society for Microbiology. 1998; 98: 360. ISSN: 1060-2011. Note: 98th General Meeting of the American Society for Microbiology, Atlanta, Georgia, USA, May 17-21, 1998.
NAL Call No.: QR1.A5
Descriptors: cattle, humans, pigeons, primates, Mycobacterium avium, Mycobacterium intracellulare, Mycobacterium avium subsp. paratuberculosis, diagnosis.

Ellingson, Jay L. E.; Bolin, Carole A.; Stabel, Judith R. Identification of a gene unique to Mycobacterium avium subspecies paratuberculosis and application to diagnosis of paratuberculosis. Molecular and Cellular Probes. June 1998; 12(3): 133-142. ISSN: 0890-8508.
NAL Call No.: RB43.7.M63
Descriptors: etiology, hspX gene cloned and sequenced, species apecific oligonucleotide synthesized, 5’terminus of mycobacterial recA gene, ovine, bovine and human isolates, Mycobacterium avium subsp. paratuberculosis, Mycobacterium paratuberculosis, Mycobacterium avium subsp. silvaticum, Mycobacterium intracellulare, dioligonucleotide hybridization (dOH) analysis, possible assay method.

Ellis, T. M.; Norris, R. T.; Martin, P. A. J.; Casey, R. H.; Hawkins, C. D. Evidence for freedom from Johne's disease in cattle and goats in Western Australia. Australian Veterinary Journal. Sept. 1998; 76(9): 630-633. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: epidemiology, cattle, goats, Mycobacterium avium subsp. paratuberculosis, Australia.

Ellis, T. M.; Carson, B. A.; Kalkhoven, M. J.; Martin, P. A. J. Specificity of two absorbed ELISAs for surveys of Mycobacterium paratuberculosis in cattle. Australian Veterinary Journal. July 1998; 76(7): 497-499. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: methods, techniques, cattle, ELISA assay, survey of disease levels, Mycobacterium avium subsp. paratuberculosis.

Garry, F.B.; Wells, S.  Reconsidering Johne's disease in dairy cows.  Proceedings of the North American Veterinary Conference.  1998; 12: 910-911.  Note:  Meeting held on January 10-14, 1998, Orlando, Florida.
NAL Call No.:  SF605.N672
Descriptors:  dairy cattle, paratuberculosis, Mycobacterium avium subsp. paratuberculosis.

Garry, F.  Ten myths about Johne's disease.  Compendium on Continuing Education for the Practicing Veterinarian.  1998; 20(11): 1275-1282.  ISSN: 0193-1903.
NAL Call No.:  SF601.C66
Descriptors:  cattle, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, disease prevalence, disease transmission, disease course, disease control, economic impact.

Grant, Irene R. Does Mycobacterium paratuberculosis survive current pasteurization conditions? Applied and Environmental Microbiology. July 1998; 64(7): 2760-2761. ISSN: 0099-2240.
NAL Call No.: 448.3 Ap5
Descriptors: milk processing, milk products, current pasteurization conditions, bacterial survival, Mycobacterium avium subsp. paratuberculosis.

Grant, Irene R.; Ball, H. J.; Rowe, M. T. Effect of high-temperature, short-time (HTST) pasteurization on milk containing low numbers of Mycobacterium paratuberculosis. Letters in Applied Microbiology. Feb. 1998; 26(2): 166-170. ISSN: 0266-8254.
NAL Call No.: QR1.L47
Descriptors: pasteurization treatment of milk, 72 degreesC for 15s. raw milk spiked with Mycobacterium avium subsp. paratuberculosis at various levels, cultured, BACTEC Middlebrook 12B radiometric medium, Herrold's egg yolk medium containing mycobactin J, IS900-based PCR, detection of acid-fast survivors, effect of bacterial differing concentrations.

Grant, Irene R.; Ball, Hywel J.; Rowe, Michael T. Isolation of Mycobacterium paratuberculosis from milk by immunomagnetic separation. Applied and Environmental Microbiology. Sept. 1998; 64(9): 3153-3158. ISSN: 0099-2240.
NAL Call No.: 448.3 Ap5
Descriptors: milk, detection techniques, Mycobacterium avium subsp. paratuberculosis, immunomagnetic separation technique, possible rapid detection method.

Gupta, V. K.; Singh, N.; Shankar, H. ELISA for detection of Mycobacterium paratuberculosis antibodies in goats. Indian Journal of Animal Sciences. May 1998; 68(5): 462-463. ISSN: 0367-8318.
NAL Call No.: 41.8 IN22
Descriptors: goats, Mycobacterium avium subsp. paratuberculosis, diagnosis, antibody testing method, ELISA.

Harboe, Morten; Wiker, Harald G.; Ulvund, Gunni; Lund, Pedersen Bent; Andersen, Ase Bengard; Hewinson, R. Glyn; Nagai, Sadamu. MPB70 and MPB83 as indicators of protein localization in mycobacterial cells. Infection and Immunity. Jan. 1998; 66(1): 289-296. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: marker proteins, culture media, Mycobacterium bovis BCG, Sauton medium, lysates, and sodium dodecyl sulfatepolyacrylamide gel electrophoresis (SDS-PAGE), ELISA and Western blotting, MPB64 and proteins of the antigen 85 complex, 3 heat shock proteins, DNAK, GroEL, GroES, 2 peaks described.

Higgs, A. R. B.; Hawkins, C. D. Ovine Johne's disease: The risk associated with sheep imported into Western Australia. Australian Veterinary Journal. Aug. 1998; 76(8): 546-550. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: risk assessment, sheep, importation concerns and screening, Mycobacterium avium subsp. paratuberculosis, stochastic simulation model, surveillance tests, source flocks, serological tests on consigned sheep pre and post transport, Western Australia.

Homuth, Matthias; Valentin, Wiegand, Peter; Rohde, M.; Gerlach, Gerald F. Identification and characterization of a novel extracellular ferric reductase from Mycobacterium paratuberculosis. Infection and Immunity. Feb. 1998; 66(2): 710-716. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: Mycobacterium avium subsp. paratuberculosis, reductase enzyme isolation, mobilizes iron from ferric ammonium citrate, ferritin, and transferrin by reduction of the metal, some properties of the enzyme mentioned, amino acids, bacterial physiology.

Hulten, K.; Karttunen, T. J.; Naser, S. A.; El Zimaity, H. M. T.; Graham, D. Y.; El Zaatari, F. A. K. In situ hybridization technique for the detection of mycobacterial spheroplasts in paraffin embedded tissue sections. Abstracts of the General Meeting of the American Society for Microbiology. 1998; 98: 360. ISSN: 1060-2011. Note: 98th General Meeting of the American Society for Microbiology, Atlanta, Georgia, USA, May 17-21, 1998.
NAL Call No.: QR1.A5
Descriptors: diagnosis and detection methods, cattle, tissue assay, cell wall deficient pathogen, Mycobacterium avium subsp. paratuberculosis.

International Embryo Transfer Society. Conclusions of the Research Subcommittee of the International Embryo Transfer Society (IETS) Import/Export Committee. Revue Scientifique et Technique Office International des Epizooties. Dec. 1998; 17(3): 839. ISSN: 0253-1933.
NAL Call No.: SF781.R4
Descriptors: issues of disease transfer, embryos, list of pathogens, cattle, goats, sheep, swine.

Keswani, J.; Frank, J. F. Thermal inactivation of Mycobacterium paratuberculosis in milk. Journal of Food Protection. Aug. 1998; 61(8): 974-978. ISSN: 0362-028X.
NAL Call No.: 44.8 J824
Descriptors: milk, treatment, ultra-high temperature milk treatment, Mycobacterium avium subsp. paratuberculosis, 3 strains, submerged glass capillary tube method, clumped and declumped suspensions.

Mainar, Jaime Raul C.; Vazquez, Boland Jose A. Factors associated with seroprevalence to Mycobacterium paratuberculosis in small-ruminant farms in the Madrid region (Spain). Preventive Veterinary Medicine. March 27, 1998; 34(4): 317-327. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: sheep, goats, 60 flocks, farm factors and management affecting infection levels, Mycobacterium avium subsp. paratuberculosis, questionnaires, seroprevalence with agar-gel immunodiffusion assay, herd size, foreign breeds and crosses, replacement rate, membership in a professional livestock organization.

Manning, Elizabeth J. B.; Steinberg, Howard; Rossow, Kurt; Ruth, George R.; Collins, Michael T. Epizootic of paratuberculosis in farmed elk. Journal of the American Veterinary Medical Association. Nov. 1, 1998; 213(9): 1320-1322. ISSN: 0003-1488.
NAL Call No.: 41.8 Am3
Descriptors: elk, description of the John’s type disease, Mycobacterium avium subsp. paratuberculosis, diagnostic techniques, production management and disease control suggestions.

May, B.; Fetrow, J.; Kapur, V.; Tune, K. The use of TaqMan as a technique to detect Mycobacterium paratuberculosis. Abstracts of the General Meeting of the American Society for Microbiology. 1998; 98: 181. ISSN: 1060-2011. Note: 98th General Meeting of the American Society for Microbiology, Atlanta, Georgia, USA, May 17-21, 1998.
NAL Call No.: QR1.A5
Descriptors: diagnosis and detection methods, Mycobacterium avium subsp. paratuberculosis.

McGraw, L.C.  Gene-based test for Johne's disease.  Agricultural Research.  1998; 46(10): 18-19.
NAL Call No.:  1.98 AG84.  ISSN: 0002-161X.
Descriptors:  dairy cattle, Mycobacterium avium subsp. paratuberculosis, bacterial diseases, diagnostic techniques.

Naser, Saleh A.; Gillespie, Robert F.; Naser, Najih A.; El Zaatari, Foaud A. K. Effect of IS900 gene of Mycobacterium paratuberculosis on Mycobacterium smegmatis. Current Microbiology. Dec. 1998; 37(6): 373-379. ISSN: 0343-8651.
NAL Call No.: QR1.C78
Descriptors: IS900 gene and/or its encoding products, involvement in mycobactin dependency, possible explanation for the slow growth rate, Mycobacterium avium subsp. paratuberculosis.

Rahn, K.; Shin, S.; Wilson, J.; Johnson, R. P.; Alves, D.; McNab, B.; Lachowski, W.; Odumeru, J.; Spika, J. Milk as a potential source of human exposure to Mycobacterium paratuberculosis. Abstracts of the General Meeting of the American Society for Microbiology. 1998; 98: 504. ISSN: 1060-2011. Note: 98th General Meeting of the American Society for Microbiology, Atlanta, Georgia, USA, May 17-21, 1998.
NAL Call No.: QR1.A5
Descriptors: milk, human health risks, zoonotic potential of Mycobacterium avium subsp. paratuberculosis.

Silbaq, Fauzi S.; Cho, Sang Nae; Cole, Stewart T.; Brennan, Patrick J. Characterization of a 34-kilodalton protein of Mycobacterium leprae that is isologous to the immunodominant 34-kilodalton antigen of Mycobacterium paratuberculosis. Infection and Immunity. Nov. 1998; 66(11): 5576-5579. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: gene homology, proteins, description of some characteristics, Mycobacterium avium subsp. paratuberculosis.

Stabel, J. R.; Goff, J. P.; Ackermann, Mark R. Dietary calcium modulates Mycobacterium paratuberculosis infection in beige mice. Veterinary Immunology and Immunopathology. Dec. 11, 1998; 66(3-4): 377-390. ISSN: 0165-2427.
NAL Call No.: SF757.2.V38
Descriptors: mouse model, laboratory experiment, differing levels of dietary calcium and effects on infection persistence, Mycobacterium avium subsp. paratuberculosis, 0.02% Ca, 0.15% Ca, 0.45% Ca, 1.0% Ca.

Stabel, J. R. Johne's disease: A hidden threat. Journal of Dairy Science. Jan. 1998; 81(1): 283-288. ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Abstract:  Paratuberculosis, which is also known as Johne's disease, is a chronic, progressive enteric disease of ruminants caused by infection with Mycobacterium paratuberculosis. Cattle become infected with M. paratuberculosis as calves but often do not develop clinical signs until 2 to 5 yr of age. The clinical disease is characterized by chronic or intermittent diarrhea, emaciation, and death. Although animals with clinical disease are often culled from the herd, animals with subclinical paratuberculosis may cause economic losses because of reduced milk production and poor reproductive performance. Although the economic impact of paratuberculosis on the national cattle industry has not been determined, it is estimated to exceed $1.5 billion/yr. The diagnosis of subclinical paratuberculosis is difficult. Bacteriologic culture is the most definitive method of diagnosis, but culture is time consuming and labor intensive. Serological assays are not very useful because animals do not develop an antibody response until the clinical stages of disease. Development of assays to measure cell-mediated immunity is critical to accurate detection of paratuberculosis in subclinically infected animals. Although not considered a zoonotic agent, M. paratuberculosis has been identified in intestinal biopsy tissue from patients with Crohn's disease, an inflammatory enteritis in humans. Currently, the potential human health risk is being addressed by research evaluating pasteurization of dairy products in the US.
Descriptors: cattle, discussion of the signs and symptoms of the disease, difficulties of diagnosis, possible zoonotic agent in Crohn’s disease, assay concerns, food born illness, dairy products.

Stabel, J. R.; Steadham, E. Survival of intracellular Mycobacterium paratuberculosis after pasteurization of raw milk. Journal of Dairy Science. 1998; 81(Suppl. 1): 42. ISSN: 0022-0302. Note: Joint Meeting of the American Dairy Science Association and the American Society of Animal Science, Denver, Colorado, USA, July 28-31, 1998.
NAL Call No.: SF221 A4
Descriptors: cattle, milk, intracellular survival, Mycobacterium avium subsp. paratuberculosis.

Stabel, J. R. Temporal Mycobacterium paratuberculosis infection in T-cell receptor deficient mice. FASEB Journal. March 17, 1998; 12(4): A569. ISSN: 0892-6638. Note: Annual Meeting of the Professional Research Scientists on Experimental Biology 98, Part 1, San Francisco, California, USA, April 18-22, 1998.
NAL Call No.: QH301.F3
Descriptors: molecular genetic, C57BL/6 mouse model, T cell receptor deficient host, Mycobacterium avium subsp. paratuberculosis, strains 19698 and Ben, infection, pathogenesis.

Sung, Nackmoon; Collins, Michael T. Thermal tolerance of Mycobacterium paratuberculosis. Applied and Environmental Microbiology. March 1998; 64(3): 999-1005. ISSN: 0099-2240.
NAL Call No.: 448.3 Ap5
Descriptors: heat tolerance; human and bovine strains Dominic, Ben, BO45, ATCC 19698, in vitro, 4 temperatures: 62, 65, 68, and 71degree C, thermal death curves, clumped and singe cells, cell concentrations of clinical Mycobacterium avium subsp. paratuberculosis strains in milk were 228.8, 47.8, and 21.8 s, respectively, Z value (the temperature required for the decimal reduction time to traverse 1 log cycle).

Sweeney, Raymond W.; Jones, Douglas E.; Habecker, Perry; Scott, Phillip. Interferon-gamma and interleukin 4 gene expression in cows infected with Mycobacterium paratuberculosis. American Journal of Veterinary Research. July 1998; 59(7): 842-847. ISSN: 0002-9645.
NAL Call No.: 41.8 Am3A
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, clinical progression factors, cytokine gene expression in affected tissues, Holstein cows, post slaughter sampling of ileum, cecal lympth nodes, reverse transcriptase-competitive polymerase chain reaction assay for mRNA expression of interferon-gamma (IFN-gamma) and interleukin 4.

Tizard, Mark; Bull, Tim; Millar, Douglas; Doran, Tim; Martin, Helene; Sumar, Nazira; Ford, Jon; Hermon, Taylor John. A low G+C content genetic island in Mycobacterium avium subsp. paratuberculosis, and M. avium subsp. silvaticum with homologous genes in Mycobacterium tuberculosis. Microbiology. Dec. 1998; 144(12): 3413-3423. ISSN: 1350-0872.
NAL Call No.: QR1.J64
Descriptors: gene specificity, detection, differential analysis, enteric pathogens, characterization.

Vannuffel, P.; Coetsier, C.; Bouyer, M.; Philippe, M.; Gala, J. L. P34 and F57 based-multiplex PCR assay for discrimination between tuberculous and nontuberculous mycobacteria. Abstracts of the Interscience Conference on Antimicrobial Agents and Chemotherapy. 1998; 38: 158. Note: 38th Interscience Conference on Antimicrobial Agents and Chemotherapy, San Diego, California, USA, September 24-27, 1998.
Descriptors: assay technique, humans, Mycobacterium avium, Mycobacterium bovis , Mycobacterium avium subsp. paratuberculosis, Mycobacterium tuberculosis, F57 and P34 analysis antigenic proteins.

Wells, S.J.; Ott, S.L.; Hillberg-Seitzinger, A.  Key health issues for dairy cattle--new and old.  Journal of Dairy Science.  1998; 81(11): 3029-3035.  ISSN: 0022-0302.
URL:  http://jds.fass.org/contents-by-date.0.shtml
NAL Call No.:  44.8 J822
Abstract:  The objective of this paper is to use available information to evaluate the relative importance of various health issues affecting dairy cattle. In addition to traditional ranking using evaluation methods based on impacts to animal productivity, this paper considers zoonotic risks, international trade implications, and animal welfare concerns. Traditional production costs rank mastitis, reproductive problems, and lameness as the top dairy cattle diseases. When the other areas of importance are included, the top-ranked diseases change to include salmonella, Johne's disease, bovine viral diarrhea-associated disease, and mastitis. Researchers in the dairy industry may want to reevaluate their criteria for setting research priorities to include zoonotic risks, international trade implications, and animal welfare concerns.
Descriptors:  dairy cows, animal health, milk production, bovine mastitis, animal welfare, production costs, bovine diarrhea virus, paratuberculosis, zoonoses, cryptosporidiosis, foodborne diseases, international trade, decision making, research projects, dairy research, research priorities.

Whittington, R.; Marsh, I.; Choy, E.; Cousins, D. Polymorphisms in IS1311, an insertion sequence common to Mycobacterium avium and Mycobacterium avium subsp. paratuberculosis, , can be used to distinguish between and within these species. Molecular and Cellular Probes. Dec. 1998; 12(6): 349-358 ISSN: 0890-8508.
NAL Call No.: RB43.7.M63
Descriptors: IS1311 insertion sequence, use as a probe, sheep, cattle strains, species evolution.

Whittington, R. J.; Marsh, I; Turner, M. J.; McAllister, S.; Choy, E.; Eamens, G. J.; Marshall, D. J.; Ottaway, S. Rapid detection of Mycobacterium paratuberculosis in clinical samples from ruminants and in spiked environmental samples by modified BACTEC 12B radiometric culture and direct confirmation by IS900 PCR. Journal of Clinical Microbiology. March 1998; 36(3): 701-707. ISSN: 0095-1137.
NAL Call No.: QR46.J6
Descriptors: cattle, sheep, goats, radiometric culture medium BACTEC 12B with PANTA PLUS, mycobactin J, and egg yolk, detection of Mycobacterium avium subsp. paratuberculosis, feces, mesenteric lymph nodes, intestinal walls, cattle, sheep, goats, IS900 PCR in the primary cultures, methodology, spiked soil and pasture samples, sensitivity, Herrold's egg yolk medium, PCR.

Williams, Stephanie Louise.  Analysis of Mycobacterium avium subspecies paratuberculosis Susceptibility to Antimicrobial Agents.  1998; 54 leaves, ill.  Note:  Thesis (M.S.).  University of Nebraska, Lincoln, 1998.
Descriptors:  Mycobacterium avium subsp. paratuberculosis, bacterial diseases, susceptibility to antibiotics, animal pathogen.


Return to Contents

1997

Alzuherri, H. M.; Little, D.; Clarke, C. J. Altered intestinal macrophage phenotype in ovine paratuberculosis. Research in Veterinary Science. Sept.-Oct., 1997; 63(2): 139-143. ISSN: 0034-5288.
NAL Call No.: 41.8 R312
Descriptors: Scottish back-faced ewes, sheep, Johne’s disease, immunohistological studies, intestinal macrophages, diseased sheep expressed MHC class II, LFA-1 and CR4 antigens weakly, comparison with normal tissues, reverse transcriptase-polymerase chain reaction analysis, MHC class II MRNA, intestinal whole tissue samples, no significant difference between control and diseased groups, Mycobacterium avium subsp. paratuberculosis.

Bannantine, John P.; Barletta, Raul G.; Thoen, Charles O.; Andrews, Robert E. Jr. Identification of Mycobacterium paratuberculosis gene expression signals. Microbiology. 1997; 143(3): 921-928. ISSN: 1350-0872.
NAL Call No.: QR1.J64
Descriptors: DNA library constructed in the transcriptional translational fusion vector pYUB76, eight clones were sequenced and characterized further, Mycobacterium avium subsp. paratuberculosis.

Bassey, Effiong O. E.; Collins, Michael T. Study of T-lymphocyte subsets to healthy and Mycobacterium avium subsp. paratuberculosis-infected cattle. Infection and Immunity. 1997; 65(11): 4869-4872. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: cattle, Johne’s disease, host immune defenses, T lymphocyte contribution to defense, lymphoproliferation and gamma interferon (IFN-gamma) production was measured in response to phytohemagglutinin (PHA) and an Mycobacterium avium antigen preparation (A-PPD), correlation between proliferation and IFN-gamma production in response to A-PPD but not to PHA.

Begara, Mcgorum Isabel M.; Wildblood, Louise A.; Jones, Douglas G. Early immune events following experimental infection of lambs with Mycobacterium avium subspecies paratuberculosis. Biochemical Society Transactions. 1997; 25(2): 279S. ISSN: 0300-5127. Note: 660th Meeting of the Biochemical Society, Joint Congress with the British Society for Immunology, Harrogate, England, UK, December 10-13, 1996.
NAL Call No.: QD415.A1B58
Descriptors: sheep, lambs, progression of the disease in the immune system, experimental infection study, Mycobacterium avium subsp. paratuberculosis.

Clarke, C. J. Paratuberculosis and molecular biology. Veterinary Journal. 1997; 153(3): 245-247. ISSN: 1090-0233.
NAL Call No.: SF601 V484
Descriptors: biochemistry, molecular, genetics, immunity, pathology, Mycobacterium avium subsp. paratuberculosis.

Collins, Michael T. Mycobacterium paratuberculosis: A potential food-borne pathogen? Journal of Dairy Science. Dec., 1997; 80 (12): 3445-3448. ISSN: 0022-0302
NAL Call No.: 44.8 J822
Abstract:  Mycobacterium paratuberculosis commonly infects dairy cattle, leading to Johne's disease, which is also known as paratuberculosis. The infection is chronic, progressive, and incurable. As the infection progresses, excretion of M. paratuberculosis in feces and milk occurs, and the bacterium spreads through the blood to multiple internal organs. Consequently, raw products originating from cattle may harbor M. paratuberculosis. Thermal treatments, such as pasteurization, are commonly relied on to kill food-borne bacterial pathogens that can infect humans. The small number of studies conducted to determine the thermal resistance of M. paratuberculosis suggest that it is less susceptible to destruction by heat killing than are milkborne zoonotic bacterial pathogens such as Listeria spp. or Mycobacterium bovis. Published reports concerning the thermal resistance of M. paratuberculosis in milk are reviewed herein, and key issues concerning the efficacy of pasteurization for elimination of M. paratuberculosis from milk are summarized.
Descriptors: Johne’s disease, raw bovine based products, human health risks, review of literature on thermal resistance of bacteria, Mycobacterium avium subsp. paratuberculosis.

Cook, W. E.; Cornish, T. E.; Shideler, S.; Lasley, B.; Collins, M. T. Radiometric culture of Mycobacterium avium paratuberculosis from the feces of tule elk. Journal of Wildlife Diseases. 1997; 33(3): 635-637. ISSN: 0090-3558.
NAL Call No.: 41.9 W64B
Descriptors: tule elk, Cervus elaphus nannodes, Point Reyes National Seashore, California, detection/incidence of Mycobacterium avium subsp. paratuberculosis, fecal samples, cultured on modified BACTEC 12B radiometric medium, positive results in 2 groups of elk, non-invasive technique for wildlife Mycobacterium monitoring.

Davies, H. L. Ovine Johne's disease. Australian Veterinary Journal. Nov., 1997; 75(11): 799. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: sheep, Mycobacterium avium subsp. paratuberculosis, human health risks, food contaminant, Australia.

De Lisle, G. W. Can Johne's disease be eradicated from sheep in Australia? Australian Veterinary Journal. 1997; 75(5): 336. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: sheep disease, Johne’s, Mycobacterium avium subsp. paratuberculosis, control and eradication.

Doran, Tim; Tizard, Mark; Millar, Douglas; Ford, Jon; Sumar, Nazira; Loughlin, Mark; Hermon, Taylor John. IS900 targets translation initiation signals in Mycobacterium avium subsp. paratuberculosis to facilitate expression of its hed gene. Microbiology. 1997; 143(2): 547-552. ISSN: 1350-0872.
NAL Call No.: QR1.J64
Descriptors: microbial genetics, IS900 insertion sites, unique targeting process.

Durham, P. J. K.; Paine, G. D. Serological survey for antibodies to infectious agents in beef cattle in northern South Australia. Australian Veterinary Journal. 1997; 75(2): 139-140. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: cattle, disease incidence, survey, blood sera, pathogens, Chlamydia, Coxiella burnetii, Mycobacterium avium subsp. paratuberculosis, Australia.

El Zaatari, Fouad A. K.; Naser, Saleh A.; Graham, David Y. Characterization of a specific Mycobacterium paratuberculosis recombinant clone expressing 35,000-molecular-weight antigen and reactivity with sera from animals with clinical and subclinical Johne's disease. Journal of Clinical Microbiology. 1997; 35(7): 1794-1799. ISSN: 0095-1137.
URL:  http://www.pubmedcentral.gov/tocrender.fcgi?iid=7098
NAL Call No.: QR46.J6
Descriptors: cattle, sheep, goats, recombinant clone expressing a 35,000 molecular weight Mycobacterium avium subsp. paratuberculosis antigen (p35 antigen), constructed expression library of Mycobacterium paratuberculosis in Escherichia coli, immunoblotting, possible diagnostic method for serodiagnosis of all ages of animals.

Ellingson, J. L. E.; Bolin, C. A.; Stabel, J. R. Identification of a new genetic element unique to Mycobacterium paratuberculosis and application to diagnosis of paratuberculosis. Abstracts of the General Meeting of the American Society for Microbiology. 1997; 97(0): 550. ISSN: 1060-2011. Note: 97th General Meeting of the American Society for Microbiology, Miami Beach, Florida, USA, May 4-8, 1997.
NAL Call No.: QR1.A5
Descriptors: genetics, specificity, cattle strain, possible diagnostic test, Mycobacterium avium, Mycobacterium intracellulare, Mycobacterium avium subsp. paratuberculosis.

Feizabadi, M. M.; Robertson, I. D.; Hope, A.; Cousins, D. V.; Hampson, D. J. Differentiation of Australian isolates of Mycobacterium paratuberculosis using pulsed-field gel electrophoresis. Australian Veterinary Journal. Dec., 1997; 75(12): 887-889. ISSN: 0005-0423.
NAL Call No.: 41.8 Au72
Descriptors: strain variations of Mycobacterium avium subsp. paratuberculosis, pulsed field gel electrophoresis, typing technique, 35 Australian isolates and 1 United Kingdom reference strain, banding patterns from endonuclease digested material, 2 groupings, strain transmission studies, Australia.

Feizabadi, Mohammad M.; Robertson, Ian D.; Cousins, Debby V.; Dawson, David J.; Hampson, David J. Use of multilocus enzyme electrophoresis to examine genetic relationships amongst isolates of Mycobacterium intracellulare and related species. Microbiology. 1997; 143(4): 1461-1469. ISSN: 1350-0872.
NAL Call No.: QR1.J64
Descriptors: diversity and distribution of Mycobacterium spp., Australia, genetic relationships at 17 enzyme loci amongst a collection of reference strains and isolates, initially identified Mycobacterium. intracellulare ,'X' mycobacteria, Mycobacterium scrofulaceum, Mycobacterium avium, Mycobacterium avium subsp. paratuberculosis, difficulties in differentiation.

Felix, J. L.; Huang, L.; Walsh, A. F.; Safranek, B. W.; Naser, N. A.; Naser, S. A. PCR detection of the IS900 gene is Mycobacterium avium strains isolated from HIV patients. Abstracts of the General Meeting of the American Society for Microbiology. 1997; 97(0): 553. ISSN: 1060-2011. Note: 97th General Meeting of the American Society for Microbiology, Miami Beach, Florida, USA, May 4-8, 1997.
NAL Call No.: QR1.A5
Descriptors: PCR, genetics, IS900 gene detection methods, humans.

Francois, B.; Krishnamoorthy, R.; Elion, J. Comparative study of Mycobacterium paratuberculosis strains isolated from Crohn's disease and Johne's disease using restriction fragment length polymorphism and arbitrarily primed polymerase chain reaction. Epidemiology and Infection. 1997; 118(3): 227-233. ISSN: 0950-2688.
NAL Call No.: RA651.A1E74
Descriptors: pathogenicity mechanisms study, Crohn’s disease, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, human, sheep and cattle strains, DNA, RFLP, IS900, arbitrarily primed polymerase chain reaction (AP-PCR).

Garry, Franklyn.  Johne's disease: what do I need to know?.  USDA, APHIS, VS, CEAH, [1997?]
URL:  http://www.aphis.usda.gov/vs/ceah/cahm/Beef_Cow-Calf/bf97john.htm
NAL Call No.:  aSF967.P33J66 1997
Descriptors:  paratuberculosis, economic aspects of the disease, control, Mycobacterium avium subsp. paratuberculosis, United States.

Gormley, Eamonn; Sandall, Laurie; Hong, Cai; Lawton, David; Murray, Alan. Identification and differentiation of mycobacteria using the P-AN promoter sequence from Mycobacterium paratuberculosis as a DNA probe. FEMS Microbiology Letters. 1997; 147(1): 63-68. ISSN: 0378-1097.
NAL Call No.: QR1.F44
Descriptors: 165 bp DNA fragment containing the P-AN promoter from Mycobacterium avium subsp. paratuberculosis, probe in Southern blots, detection of related sequences in other species of mycobacteria.

Gupta, V. K.; Singh, Nem; Singh, S. V.; Shankar, Hari. Adoption of M. paratuberculosis (isolated from goat and sheep) into liquid medium from solid medium. Indian Veterinary Medical Journal. 1997; 21(1): 14-17. ISSN: 0250-5266.
Descriptors: goat and sheep isolates, Mycobacterium avium subsp. paratuberculosis, Herrold's egg yolk medium with mycobactin J, modified Watson & Raid liquid medium, aeration requirement, 2 pH levels, limited success in liquid medium.

Gwozdz, J. M.; Reichel, M. P.; Murray, A.; Manktelow, W.; West, D. M.; Thompson, K. G. Detection of Mycobacterium avium subsp. paratuberculosis in ovine tissues and blood by the polymerase chain reaction. Veterinary Microbiology. 1997; 57(2-3): 233-244. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: 12 ewes sheep, polymerase chain reaction (PCR) test, DNA extractions, blood, liver, ileocecal lymph node, ileum, assay comparison study, serological tests: complement fixation test (CFT), gel diffusion test (AGID), two enzyme-linked immunosorbent assays (ELISA).

Higgs, T.  Sheep Johne's disease--keeping it out of WA.  Journal of Agriculture. 1997; 38 (3): 77-80.  ISSN:  0021-8618.
NAL Call No.:  23 W52J
Descriptors:  sheep, Mycobacterium avium subsp. paratuberculosis, disease prevention, Western Australia.

Holsinger, V. H.; Rajkowski, K. T.; Stabel, J. R. Milk pasteurisation and safety: A brief history and update. Revue Scientifique et Technique Office International des Epizooties. Aug., 1997; 16(2): 441-451. ISSN: 0253-1933. Note: In English with English, French, and Spanish summaries.
NAL Call No.: SF781.R4
Descriptors: food safety, milk processing, efficiency of current pasteurization methods in regard to pathogens, Mycobacterium avium subsp. paratuberculosis, Listeria monocytogenes, Escherichia coli O257:H7, Bacillus cereus endospores.

Huang, L.; Naser, N. A.; Naser, S. A. Cloning of a Mycobacterium paratuberculosis 32K-encoding gene: A possible fibronectin attachment protein-encoding gene. Abstracts of the General Meeting of the American Society for Microbiology. 1997; 97(0): 561. ISSN: 1060-2011. Note: 97th General Meeting of the American Society for Microbiology, Miami Beach, Florida, USA, May 4-8, 1997.
NAL Call No.: QR1.A5
Descriptors: genetics, cloning of specific genes, fibronectin, proteins, Mycobacterium avium subsp. paratuberculosis.

Hveem, Eli. Importation of cattle: An evaluation of the risk of the importation and spread of paratuberculosis infections. Norsk Veterinaertidsskrift. 1997; 109(11): 669-671. ISSN: 0332-5741. Note: In Norwegian.
Descriptors: epidemiology, cattle, disease introduction risks, Mycobacterium avium subsp. paratuberculosis.

Hwang, Eui Kyung; Jean, Young Hwa; Son, Hyun Joo; Moon, Oun Kyong; Kim, Jae Hoon; Bae, You Chan; Park, Jung Won; Choi, Sang Ho; Yoon, Sang Bo. A case report of Johne's disease in a Korean native cow. RDA Journal of Veterinary Science. Dec., 1997; 39(2): 33-41. ISSN: 1226-5675. Note: In Korean with Korean and English summaries.
NAL Call No.: SF604 R33
Descriptors: Korean native cow, case study, Mycobacterium avium subsp. paratuberculosis, necropsy, classical clinical signs, gross and histopathologic lesions, results of the acid-fast tissue staining, immunohistochemical staining and electron microscopy.

Jark, Uwe; Ringena, Ibeling; Franz, Beate; Gerlach, Gerald F.; Beyerbach, Martin; Franz, Burkart. Development of an ELISA technique for serodiagnosis of bovine paratuberculosis. Veterinary Microbiology. 1997; 57(2-3): 189-198. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: Mycobacterium avium subsp. paratuberculosis isolate, large-scale culture, efficient preparation of a lipoarabinomannan containing antigen was developed and standardized, ileocaecal lymphnodes cultured to isolate viable Mycobacterium paratuberculosis ELISA.

Johnson, Ifearulundu Yvette J.; Kaneene, John B. Relationship between soil types and Mycobacterium paratuberculosis. Journal of the American Veterinary Medical Association. 1997; 210(12): 1735-1740. ISSN: 0003-1488.
NAL Call No.: 41.8 Am3
Descriptors: cattle, soils, Mycobacterium avium subsp. paratuberculosis relationship.

Klausen, J.; Perez, V.; Giese, S. B.; Garcia, Marin J. F.; Ahrens, P. Immunological detection of sheep experimentally infected with strains of Mycobacterium avium subspecies containing insertion sequence IS901/IS902 and a 40 kDa protein. Veterinary Microbiology. 1997; 57(2-3): 181-187. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: monoclonal antibody, 40 kDa protein, Mycobacterium avium strains (IS901/IS902 positive), developed a blocking ELISA, experimentally infected sheep sera, diagnostic value, indirect ELISA, AGID and blocking ELISA compared.

Mason, O.; Rowe, M. T.; Ball, H. J. Is Mycobacterium paratuberculosis a possible agent in Crohn's disease? Implications for the dairy industry. Milchwissenschaft. 1997; 52(6): 311-316. ISSN: 0026-3788. Note: In English with summaries in English and German.
NAL Call No.: 44.8 M5933
Descriptors: dairy products, milk, ice cream, cheese, human health risks, Mycobacterium avium subsp. paratuberculosis contamined milk, possible zoonotic agent, potential impacts on dairy industry, recommendations for future research.

McDowell, R. M.; McElvaine, M. D. Long-term sequelae to foodborne disease. Revue Scientifique et Technique Office International des Epizooties. Aug., 1997; 16(2): 337-341. ISSN: 0253-1933. Note: In English with English, French, and Spanish summaries.
NAL Call No.: SF781.R4
Descriptors: possible relationship between Mycobacterium avium subsp. paratuberculosis and Crohn’s disease, descriptions of syndromes, epidemiology, economic information, reduction in food borne diseases.

Morgan, K.L.; Cetinkaya, B.; Egan, K. Johne's and Crohn's: Inflammatory bowel diseases with a similar aetiology? In Society for Veterinary Epidemiology and Preventive Medicine. Edited by Goodall, E.A.; Thrusfield, M.V. The Society, England, UK, 1997; p. 47-56. ISBN: 0948073292. Note: From a meeting held in Chester, England, UK, April 9-11, 1997.
Descriptors: intestinal diseases, humans, cattle, sheep, Mycobacterium avium subsp. paratuberculosis, possible cause of Crohn’s disease.

Mulder, M. A.; Zappe, H.; Steyn, L. M. Characterization of the Mycobacterium tuberculosis katG promoter and regulation of expression. Abstracts of the General Meeting of the American Society for Microbiology. 1997; 97(0): 566. ISSN: 1060-2011. Note: 97th General Meeting of the American Society for Microbiology, Miami Beach, Florida, USA, May 4-8, 1997.
NAL Call No.: QR1.A5
Descriptors: genetics, promoter, physiology, bacterial genetics, Escherichia coli, Mycobacterium avium subsp. paratuberculosis, Mycobacterium smegmatis, Mycobacterium tuberculosis.

Mutharia, L. M.; Moreno, W.; Raymond, M. Analysis of culture filtrate and cell wall-associated antigens of Mycobacterium paratuberculosis with monoclonal antibodies. Infection and Immunity. 1997; 65(2): 387-394. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: specific antigens, release of antigens and distribubion of specific epitopes in Mycobacterium species, immunoblot analysis, monoclonial antibodies, Mab B6A.

Obasanjo, Iyabo O.; Grohn, Yrjo T.; Mohammed, Hussni O. Firm factors associated with the presence of Mycobacterium paratuberculosis infection in dairy herds on the New York State Paratuberculosis Control Program. Preventive Veterinary Medicine. Oct., 1997; 32(3-4): 243-251. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: extensive questionnaire, data from 33 herds, New York State Paratuberculosis Control Program, farm factors Mycobacterium avium subsp. paratuberculosis infection in dairy herds, 31 continuous and 67 categorical risk factors, univariable logistic regression, 10 factors: the type of farm operation (commercial/registered or both), earlier diagnosis of the disease before entering the control program; number of clinical cases in the previous year, clinical cases farm or purchased animals, typical signs in clinical cases, fecal exposure of calves 0-6 weeks of age, contact with adult animal feces due to shared cleaning equipment, spreading feces on fields that contaminated forage, treatment and handling of those suspected of having Johne’s, frequency of barn cleaning, New York State.

Ollis, G.W.  Johne's disease: a cloud on the horizon.  Advances in Dairy Technology.  1997; 9: 151-162.  ISSN:  1184-0684.
URL:  http://www.wcds.afns.ualberta.ca/
NAL Call No.:  SF223.W478
Descriptors:  Mycobacterium avium subsp. paratuberculosis, possible economic impact of the disease, control concerns.

Onet, George E. Current paratuberculosis diagnosis in cattle. Large Animal Practice. July-Aug., 1997; 18(4): 18-22. ISSN: 1092-7603.
NAL Call No.: SF601 B6
Descriptors: diagnosis, methods, cattle, mycobacteria, issues, concerns regarding testing methods.

Pell, Alice N. Manure and microbes: Public and animal health problem? Journal of Dairy Science. Oct., 1997; 80(10): 2673-2681. ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Descriptors: microbial contamination in the environment, waste management, human health risks, control and remediation, pathogen contaminants, Cryptosporidium parvum, Giardia spp., Listeria monocytogenes, Escherichia coli O157:H7, Salmonella spp., and Mycobacterium avium subsp. paratuberculosis, enteric viruses, clinical symptoms, control methods, recommendations for control.

Perez, V.; Tellechea, J.; Badiola, J. J.; Gutierrez, M.; Garcia, Martin J. F. Relation between serologic response and pathologic findings in sheep with naturally acquired paratuberculosis. American Journal of Veterinary Research. 1997; 58(8): 799-803. ISSN: 0002-9645.
NAL Call No.: 41.8 Am3A
Descriptors: 134 adult sheep, culled for illness, tested blood, sera testing, correlations between lesions and serologic response, sheep, natural infection, intestinal lesions, Mycobacterium avium subsp. paratuberculosis, efficacy of agar gel immunodiffusion (AGID) and ELISA as diagnostic tests.

Rainsford, K. D. Emerging research in gastrointestinal diseases. In: Cell Injury and Protection in the Gastrointestinal Tract: From Basic Sciences to Clinical Perspectives 1996 edited by Mozsik, G.; Nagy, L.; Par, A.; Rainsford, K. D. Kluwer Academic Publishers, AZ Dordrecht, Netherlands; Kluwer Academic Publishers, MA 1997; p. 1-7. ISBN: 0792387201. Note: Fourth International Symposium, Pecs, Hungary, October 8-11, 1995.
Descriptors: Helicobacter pylori, Mycobacterium avium subsp. paratuberculosis, research.

Reichelderfer, M.; Cherney, T. M.; Chicks, D. S.; Harms, B. A.; Manning, E. B.; Collins, M. T. Seroprevalence of Mycobacterium paratuberculosis (Mptb) antibodies in inflammatory bowel disease (IBD) patients and two populations at risk of exposure to this pathogen. Gastroenterology. 1997; 112(4 Suppl.): A1069. ISSN: 0016-5085. Note: Digestive Disease Week and the 97th Annual Meeting of the American Gastroenterological Association, Washington, D.C., USA, May 11-14, 1997.
NAL Call No.: RC799.G37
Descriptors: possible zoonotic bacteria, pathology, Mycobacterium avium subsp. paratuberculosis.

Rowe, Michael T.; Fearon, Anna M.; Johnston, Donald E.; Early, John. Dairy research in the Food Science Division, Belfast. International Journal of Dairy Technology. May, 1997; 50(2): 61-63. ISSN: 1364-727X.
NAL Call No.: SF221.I58
Descriptors: dairy related, heat resistance of Mycobacterium avium subsp. paratuberculosis, Escherichia coli, raw milk, shelf life of pasteurized milk, high pressure processing of dairy products, Ireland.

Sacco, T.; Gennero, M.S. Indagine sierologica in allevamenti problema sul territorio regionale per la paratubercolosi.  [Johne's disease serological investigation on suspected infected herds in Piedmont.]  Veterinaria Italiana.  1997; 33(26): 16-18.  ISSN:  0505-401X.  Note:  In Italian with an English summary.
Descriptors:  Piedmont cattle, infected herds, Johne’s disease, Mycobacterium avium subsp. paratuberculosis, Mycobacterium phlei, paratuberculosis, serological survey, Piedmont, Italy.

Scheibl, Peter; Gerlach, Gerald F. Differentiation of Mycobacterium paratuberculosis isolates by rDNA-spacer analysis and random amplified polymorphic DNA patterns. Veterinary Microbiology. 1997; 57(2-3): 151-158. ISSN: 0378-1135.
NAL Call No.: SF601.V44
Descriptors: strain identification, methods, molecular techniques, 16 isolates, nucleotide sequence analysis of rDNA-spacer, random amplified polymorphic DNA (RAPD) analysis using decamer primers with GC contents of 60 to 70%, evaluation of assay, potential use as a method to differentiate strains.

Secott, T. E.; Ohme, A. M.; Barton, K. S.; Rommel, F. A. Comparison of Mycobacterium paratuberculosis detection methods: Standard culture vs. accelerated culture. Abstracts of the General Meeting of the American Society for Microbiology. 1997; 97(0): 550-551. ISSN: 1060-2011. Note: 97th General Meeting of the American Society for Microbiology, Miami Beach, Florida, USA, May 4-8, 1997.
NAL Call No.: QR1.A5
Descriptors: detection methods comparison, cattle strains, Mycobacterium avium subsp. paratuberculosis.

Stabel, J. R.; Steadham, E. M.; Bolin, C. A. Heat inactivation of Mycobacterium paratuberculosis in raw milk: Are current pasteurization conditions effective? Applied and Environmental Microbiology. Dec., 1997; 63(12): 4975-4977. ISSN: 0099-2240.
NAL Call No.: 448.3 Ap5
Descriptors: current commercial pasteurization methods, Mycobacterium avium subsp. paratuberculosis contaminated raw milk, in vitro experiments, pasteurization regimes, viability, 65, 72, 74, or 76 degree C, 0 to 30 min, 72 degrees, was effective.

Stabel, J. R.; Steadham, E.; Bolin, C. A. Heat inactivation of Mycobacterium paratuberculosis in raw milk by the holder test-tube method and laboratory-scale pasteurizer method. Abstracts of the General Meeting of the American Society for Microbiology. 1997; 97(0): 183. ISSN: 1060-2011. Note: 97th General Meeting of the American Society for Microbiology, Miami Beach, Florida, USA, May 4-8, 1997.
NAL Call No.: QR1.A5
Descriptors: raw milk, in vitro study, heat tolerance, survival after various pasteurization treatments, Mycobacterium avium subsp. paratuberculosis.

Stabel, J. R. Johne's disease: A hidden threat. Journal of Animal Science. 1997; 75(Suppl. 1): 48. ISSN: 0021-8812. Note: 89th Annual Meeting of the American Society of Animal Science, Midwestern Section.
NAL Call No.: 49 J82
Descriptors: cattle, Mycobacterium avium subsp. paratuberculosis, Johne's disease, economic impact, animal health protection and safety, possible zoonotic disease.

Staerk, K. D. C.; Frei, Staeheli C.; Frei, P. P.; Pfeiffer, D. U.; Danuser, J.; Audige, L.; Nicolet, J.; Strasser, M.; Gottstein, B.; Kihm, U. Incidence and costs of health problems in Swiss dairy cattle and their calves (1993-1994). Schweizer Archiv fuer Tierheilkunde. 1997; 139(8): 343-353. ISSN: 0036-7281. Note: In German with German, English, French, and Italian summaries.
NAL Call No.: 41.8 SCH9
Descriptors: dairy cattle, 13 dairy herds, blood and feces collected, pathogenicity, pathogens identified included Leptospira hardjo, Coxiella burnetii, Mycobacterium avium subsp. paratuberculosis.

Steele, Marina L.; McNab, W. Bruce; Poppe, Case; Griffiths, Mansel W.; Chen, Shu; Degrandis, Stephanie A.; Fruhner, Lynne C.; Larkin, Carolyn A.; Lynch, John A.; Odumeru, Joseph A. Survey of Ontario bulk tank raw milk for food-borne pathogens. Journal of Food Protection. Nov., 1997; 60(11): 1341-1346. ISSN: 0362-028X.
NAL Call No.: 44.8 J824
Descriptors: proportion, raw milk, Listeria monocytogenes, Salmonella spp., Campylobacter spp., and/or verotoxigenic Escherichia coli (VTEC), 1,720 pick ups, food borne pathogens, Ontario, Canada.

Stevenson, K.; Sharp, J. M. The contribution of molecular biology to Mycobacterium avium subspecies paratuberculosis research. Veterinary Journal. 1997; 153(3): 269-286. ISSN: 1090-0233.
NAL Call No.: SF601 V484
Descriptors: discussion of research into molecular aspects of the bacteria.

Stitt, D. T.; Sturm, K. M. Preliminary growth requirements of Mycobacterium paratuberculosis in the BBL MGIT mycobacteria growth indicator tube. Abstracts of the General Meeting of the American Society for Microbiology. 1997; 97(0): 570. ISSN: 1060-2011. Note: 97th General Meeting of the American Society for Microbiology, Miami Beach, Florida, USA, May 4-8, 1997.
NAL Call No.: QR1.A5
Descriptors: methodologies, physiology, growth factors, Mycobacterium avium subsp. paratuberculosis.

Sung, N.; Collins, M. T. Heat resistance of Mycobacterium paratuberculosis. Abstracts of the General Meeting of the American Society for Microbiology. 1997; 97(0): 443. ISSN: 1060-2011. Note: 97th General Meeting of the American Society for Microbiology, Miami Beach, Florida, USA, May 4-8, 1997.
NAL Call No.: QR1.A5
Descriptors: bacterial characteristics, heat tolerance, Mycobacterium avium subsp. paratuberculosis.

Thorne, J. G.; Hardin, L. E. Estimated prevalence of paratuberculosis in Missouri, USA cattle. Preventive Veterinary Medicine. 1997; 31(1-2): 51-57. ISSN: 0167-5877.
NAL Call No.: SF601.P7
Descriptors: disease incidence, cattle, 89 herds, seroprevalance of Mycobacterium avium subsp. paratuberculosis absorbed ELISA for detection of antibodies.

United States. Animal and Plant Health Inspection Service. Veterinary Services National Animal Health Monitoring System (U.S.).  Johne's Disease on U.S. Dairy Operations.  U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service, Veterinary Services,  Fort Collins, Colorado  [1997]; 52 p. : ill., maps. 
NAL Call No.:   aSF967.P33J64 1997
Descriptors:  dairy cattle, dairy farms, status of the disease, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, United States.

Valente, C.; Cuteri, V.; Giandomenico, R. Quondam; Gialletti, L.; Franciosini, M. P. Use of an experimental chicks model for paratuberculosis enteritis (Johne's disease). Veterinary Research. 1997; 28(3): 239-246. ISSN: 0928-4249. Note: In English with summaries in English and French.
NAL Call No.: SF602 A5
Descriptors: animal disease model, conventional chicks immunodepressed by a Cyclophosphamide injection and concurrent inoculation of Infectious Bursal Disease Virus (IBDV), experimental infection, Mycobacterium avium subsp. paratuberculosis, 4 month study, shedding of bacteria, intestinal lesions, aggregation of macrophages with monocytes and lymphocytes, no diarrhea, possible useful model to study the disease.

Zhao, Benyang; Collins, Michael T.; Czuprynski, Charles J. Effects of gamma interferon and nitric oxide on the interaction of Mycobacterium avium subsp. paratuberculosis with bovine monocytes. Infection and Immunity. 1997; 65(5): 1761-1766. ISSN: 0019-9567.
NAL Call No.: QR1.I57
Descriptors: cattle, while blood cells, recombinant bovine gamma interferon (rIFN-gamma), NO, interaction of Mycobacterium avium subsp. paratuberculosis.


Return to Contents

1996

Begara, Mcgorum I.; Wildblood, L.; Jones, D. G. Early immune events following experimental infection of lambs with Mycobacterium avium subspecies paratuberculosis. Immunology. 1996; 89(Suppl. 1): 65. ISSN: 0019-2805. Note: Joint Congress of the British Society for Immunology and the Biochemical Society, Harrogate, England, UK, December 10-13, 1996.
NAL Call No.: 448.3 Im6 Suppl.
Descriptors: lamb, sheep, immunity.

Clarke, C. J.; Colston, A.; Little, D.; Kay, J.; Alzuherri, H. M.; Sharp, J. M.; Burrells, C. The immune response in paratuberculosis infection of small ruminants. Veterinary Immunology and Immunopathology. 1996; 54(1-4): 321. ISSN: 0165-2427. Note: Fourth International Veterinary Immunology Symposium, Davis, California, USA, July 1995.
NAL Call No.: SF757.2.V38
Descriptors: goat, sheep, immune system responses, Mycobacterium avium subsp. paratuberculosis.

Grgic, Z.; Vidic, Branka; Lazic, S.; Stojanov, I. Paratuberculosis (Johne's disease). Veterinarski Glasnik. 1996; 50(7-8): 481-490. ISSN: 0350-2457. Note: In Serbo-Croatian with English and Russian summaries.
NAL Call No.: 41.8 J93
Descriptors: disease description, Mycobacterium avium subsp. paratuberculosis, distribution, diagnostic methods mentioned, prevention and control measures.

Gupta, V. K.; Singh, Nem; Singh, S. V.; Shankar, Hari. Faecal microscopic examination: A tool for diagnosis of Johne's disease in small ruminants. Indian Veterinary Medical Journal. 1996; 20(3): 213-214. ISSN: 0250-5266.
Descriptors: goats, fecal examination, diagnostic methods, Mycobacterium avium subsp. paratuberculosis.

Johnson, L.R.W.  Johne's disease.  Proceedings of the North American Veterinary Conference.  1996; 10: 671.  Note:  Meeting held Jan. 13-17, 1996, Orlando, Florida.
NAL Call No.:  SF605.N672
Descriptors:  Camelidae, Mycobacterium avium subsp. paratuberculosis, paratuberculosis.

Meylan, Mireille; Rings, D. Michael; Shulaw, William P.; Kowalski, Joseph J.; Bech, Nielsen Steen; Hoffsis, Glen F. Survival of Mycobacterium paratuberculosis and preservation of immunoglobulin G in bovine colostrum under experimental conditions simulating pasteurization. American Journal of Veterinary Research. 1996; 57(11): 1580-1585. ISSN: 0002-9645.
NAL Call No.: 41.8 Am3A
Descriptors: survival of bacteria Mycobacterium avium subsp. paratuberculosis in pasteurized colostrum, effect on IgG concentration in colostrum, pasteurization temperatures (63 C) for 30 minutes and approximately 20 to 23 C cultured in Herrold's egg yolk medium with and without mycobactin J did not kill all bacteria.

Neutra, Marian R.; Kraehenbuhl, Jean Pierre. Antigen uptake by M cells for effective mucosal vaccines. In Mucosal Vaccines. Edited by Kiyono, H.; Ogra, P. L.; McGhee, J. R. Academic Press, Inc., California, US; Academic Press Ltd., England, UK. 1996; p. 41-55. ISBN: 0124105807.
NAL Call No.: QR185.9 M83M86 1996
Descriptors: various enteric pathogens, Mycobacterium avium subsp. paratuberculosis, Salmonella spp., Shigella spp., Vibrio cholerae, Yersinia spp.

Olcott, B.M.  Johne's disease.  Proceedings of the North American Veterinary Conference.  1996; 10: 636-638.  Note:  Meeting held Jan. 13-17, 1996, Orlando, Florida.
NAL Call No.: SF605.N672
Descriptors:  cattle, paratuberculosis, Mycobacterium avium subsp. paratuberculosis, diagnosis, clinical aspects, disease control.

Rossiter, C.A.  Approach for designing appropriate Johne's disease control programs on the farm.  Proceedings. Annual Conference of the American Association of Bovine Practioners Conference.  1996; (29th): 33-45.  Note:  Meeting held on Sept. 12-14, 1996, San Diego, California.
Descriptors:  livestock, on the farm suggestions, disease prevention and control, Mycobacterium avium subsp. paratuberculosis.  

Shome, Rajeswari; Shome, B. R.; Krishnappa, G.; Raghavan, R. Diagnosis of bovine paratuberculosis by crossed immunoelectrofocusing. Indian Veterinary Journal. 1996; 73(9): 911-913. ISSN: 0019-6479.
NAL Call No.: 41.8 IN2
Descriptors: sonicated antigens, Mycobacterium avium subsp. paratuberculosis, Mycobacterium. phlei and Corynebacterium renale, electrophoresed against bovine antiparatuberculosis serum in CrIEF with reference to their antigenicity, antigenic sharing and specific diagnosis.

Wards, Barry J. Evaluation of defined media suitable for isolation of auxotrophic mutants of mycobacteria. Journal of Basic Microbiology. 1996; 36(5): 355-362. ISSN: 0233-111X.
NAL Call No.: QR1 Z4
Descriptors: 5 liquids evaluated, solid support matrices added to liquids, Tween 80 inhibitory effect, agar inhibited, Middlebrook 7H9.


Return to Contents

USDA and USDA Sponsored Research




PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 JUN 2005 TERM: 31 May 2008 FY: 2005
INVESTIGATOR: Habtemariam, T.; Yehualaeshet, T.
PERFORMING INSTITUTION: Microbiology, Tuskegee University, Tuskegee, Alabama 36088
SUBJECT: Comparison and validation of IS900 and putative sequence (Mptb52.16) as a diagnostic tool for Mycobacterium avium subsp. paratuberculosis.
NON-TECHNICAL SUMMARY: Prolonged incubation period of Mycobacterium avium subsp. paratuberculosis and individual variability in subclinical and clinical disease expression makes the diagnosis of the disease challenging.  The goal of this study is to develop a more rapid and sensitive DNA-based (conventional or real-time PCR-based diagnostic test) to detect M. avium subsp. paratuberculosis in milk.  The specificity and susceptibility of real-time PCR based on IS900 and putative sequence as target will be compared.
OBJECTIVES: General: Paratuberculosis (Johne's disease) is a chronic granulomatous enteric disease of mainly ruminants caused by Mycobacterium avium subsp. paratuberculosis.  A prolonged incubation period and great individual variability in subclinical and clinical disease expression are characteristic of paratuberculosis.  Excretion of the organism may occur for prolonged periods (1 to 2.5 years) before the onset of clinical disease (1,2).  Thus, early diagnosis of infected animals is important to avoid spreading of the disease, because control is dependent on detection and culling of infected animals as early as possible.  Until recently, only a few M. paratuberculosis-specific genes and antigens/epitopes have been identified, of which IS900 has been mainly documented followed by some putative sequences (3).  Several PCR assays based on IS900 have been developed for the detection of M. avium subsp. paratuberculosis (4,5).  PCR has been used to improve the identification of microorganisms, especially where traditional microbiological detection methods have serious limitations. The goal of this study is to develop a more rapid and sensitive DNA-based (conventional or real-time PCR-based diagnostic test) to detect M. avium subsp. paratuberculosis in milk.  We will compare the specificity and susceptibility of real-time PCR based on IS900 and putative sequence as target.  Specific objectives: Objective 1: To optimize the conventional PCR and real-time PCR-based diagnostic test of M. avium subsp. paratuberculosis based on IS900- insertion segment and putative sequence, Mptb52.16.  Cost analysis, including material and labor, indicated an approximately 50% higher cost per test for bacteriological culture than for the conventional and real-time PCR tests.  The real-time PCR (RT-PCR) method is relatively simple and robust, and results can be achieved within 24 h.  The additional advantage of DNA-based assays is the detection of non-culturable organisms where it is critical to detect all sources of infection.  Objective 2: Determine the diagnostic limit of DNA-based diagnostic methods in spiked milk.  Milk and fecal samples are the most common specimens for paratuberculosis diagnosis.  Milk is considered to be a difficult specimen for the detection of organisms by PCR, due to the presence of large amounts of fat and calcium ions.  Detectable quantities of M. avium subsp. paratuberculosis have previously been reported in the milk of both clinically infected and subclinically infected cattle with Johne's disease.  Therefore, we selected to spike the milk as the first line of sample to determine the specificity and limitation of RT-PCR as a diagnostic tool.  Objective 3: Compare and validate the real-time PCR using IS900- insertion and putative sequence (Mptb52.16).  The main goal of this objective is to examine whether any of the fragments have better diagnostic potential to diagnose M. avium subsp. paratuberculosis.  Purified DNA will be analyzed by conventional and real-time PCR targeting IS900 and putative sequence to detect M. avium subsp. paratuberculosis in milk.
APPROACH: The DNA-based RT- PCR will target IS900 segment and putative sequence.  The details of the sequence (AF503873, Mptb52.16), for the primers and probe synthesis will be accessed from the GenBank.  Bacterial strains, which will be used in this investigation, are: Strain *Source or reference Origin M. avium, 15769 ATCC chicken M. paratuberculosis, 19698 ATCC (type strain) bovine M. paratuberculosis 43015 ATCC human M. scrofulaceum 19275 ATCC M. vaccae 15483 ATCC cow's milk *Sources of bacterial strains are from ATCC, American Type Culture Collection (Rockville, MD, USA); The strains of M. avium, scrofulaceum and M. vaccae will be used as a negative control.  Bacterial suspension preparation and bacterial growth: After repeated treatment of cells in the Branson ultrasonic cleaner to disintegrate of clumps an approximate measure of cell number will be determined by using the optical density at 550 nm or hematocytometer.  Extraction of mycobacterial DNA from culture and spiked milk:  Due to the complex, difficult matrix involved, several strategies will be considered for the DNA extraction.  To overcome this problem, organisms will be concentrated to a pellet by centrifugation and resuspended in prewarmed in PBS.  DNA will be isolated from growing cultures and purified by using freeze thawing, enzymatic degradation, lysis, phenol-chloroform treatment, and isopropanol precipitation.  Samples of milk (10 ml) will be spiked with 10 to 106 M. avium subsp. paratuberculosis organisms, and the organisms will be concentrated by centrifugation and resuspended in 2 ml of PBS.  Real-time PCR assay.  RT-PCR will be conducted in a Smartcycler.  To evaluate the usefulness of the technique we will perform a parallel study of culture detection and Ziehl-Neelsen stain of M. avium subsp. paratuberculosis.  Quantitation: The unknown targets will be evaluated by using DNA samples containing various amounts of known template (range, 101 to 106 copies).  Personnel and Institutional capacity: The experience of the first PI in molecular diagnosis of Mycobacterium bovis, as a PhD research work, will be potential to solve the unformatted difficulties.  Tuskegee University, College of veterinary medicine, Nursing and Allied Health, has all the instrumentations (Culture facilities, conventional PCR, RT-PCR machines) to accomplish the proposed experiment.  Pitfalls and Alternative Approaches: One possible difficulty may be getting the DNA, which is suitable for the PCR technique.  To overcome this problem, the use of different DNA extraction protocol including immunocapture will be as an alternate solution.  Expected Result and Future Direction Our hypothesis is that, there is possibility of improving the diagnosis of Johne's disease in context of time, cost and accuracy.  The proposal will compare and select the efficient target and protocol for the diagnosis of M. avium subsp. paratuberculosis from milk samples.  Time Table: Year 1: Optimize the protocol, PCR, RT-PCR, Year 2: Milk spike and validation of the procedure Year 3: Further laboratory work, prepare manuscript and design for further grant application
PROJECT CONTACT:
     Name: Yehualaeshet, T.  Phone: 334-727-8107.  Fax: 334-724-4277
     Email: teyehual@tuskegee.edu
     URL: http://compepid.tuskegee.edu/

 

PROJ TYPE: USDA INHOUSE PROJ STATUS: TERMINATED
START: 01 DEC 1998 TERM: 12 JUN 2002 FY: 2002
INVESTIGATOR: Stanker L H; Ravva S V; Duffy B K
PERFORMING INSTITUTION: Western Regional Research Center. Albany, California 94710
SUBJECT:  Treatment of animal manure to prevent pathogen transmission.
OBJECTIVES:  1) Develop methods to identify Salmonella, Campylobacter, and other bacterial and parasitic pathogens, as they are found in animal waste, and define their survival characteristics; 2) Develop methods to handle and treat animal manure during production in order to preclude transmission of these pathogens to land and/or crops for human food.
APPROACH: A combination of microbiological and biochemical approaches will be employed to characterize the biology of pathogens in animal waste.  Pathogens in manure will be studied by confocal and scanning electron microscopy to determine whether biofilms are present.  New methods for detection and identification of pathogens will be developed. Pathogen reporter strains will be produced.  The survival of pathogens in manure will be studied by microbiology and molecular biology approaches.  New compounds and/or treatment methods for minimizing pathogens will be developed and tested.  This research should be conducted in collaboration with the U.S. Salinity Laboratory in Riverside.  FY99 Prgm Inc.($540,000) for treatment of animal manure to prevent pathogen transmission.  Previously was 5325-42000-023-00D (05/01).
PROGRESS: 1998/12 TO 2002/06.  1. What major problem or issue is being resolved and how are you resolving it?  The increasing number of outbreaks of human disease as a result of microbial contamination of meat, poultry, fruits and vegetables is a major concern to all US citizens.  Manure, irrigation water, and bioaerosols are recognized as potential sources of this contamination.  Basic and applied research to help understand the biology of food-borne pathogens in manure and the environments influenced by manure are required to facilitate development of new strategies for minimizing pathogens in manure, water and air.  We are developing methods for tracking pathogens, identifying mechanisms crucial to pathogen survival in manure, and developing new strategies for minimizing pathogens in manure.  2. How serious is the problem?  Why does it matter?  More than eighty million tons of manure are produced each year in the United States.  Due to the confinement of many food-producing animals, the manure is concentrated in relatively small areas and is difficult to control.  Improperly managed manure can harm the environment and become a serious food safety and public health issue.  Food-borne pathogen outbreaks are very serious.  They are considered by most consumers, food processors, food safety researchers and regulatory agencies to be the most important food safety problem today.  It is estimated that there are 10 million to 100 million cases of food-borne illnesses each year.  In addition, there is concern that the virulence of some pathogens may be increasing (e.g. hemolytic uremic syndrome, Guillain-Barre syndrome, reactive arthritis).  Research that helps to minimize the number and virulence of pathogens in food is important for maintaining confidence in the food supply. 3. How does it relate to the national Program(s) and National Program Component(s) to which it has been assigned?  The project addresses pathogen research components of National Programs 108 on 1) Food Safety and 2) Manure and Byproduct Utilization.  Our program is addressing many of the goals of the National Programs including "the survival, transport and ultimate fate of pathogens from manure and other byproducts" and "the effects of manure management on harmful organisms".  4. What was your most significant accomplishment this past year? A. Single Most Significant Accomplishment during FY 2001 year: The survival of human pathogenic E.coli O157:H7 marked with rifampin resistance is being monitored in aerated and non-aerated manure lagoon water from a California dairy farm with active manure management practices that include separation of manure solids followed by aeration in lagoons.  Laboratory scale manure water microcosms aerated with miniaturized circulating aerators provided by our MOU partners were used to monitor the survival and proliferation of pathogens.  The populations of E.coli O157:H7 declined rapidly from 105 cells/mL to undetectable levels.  Strain variations were noted.  However, a strain of O157:H7 isolated from a dairy survived longer than the isolates from the culture collection.  These studies on pathogen survival in manure lagoons are critical in designing management strategies and are of much interest to dairymen and the manufacturer of circulating aerators.  B. Other Significant Accomplishments, if any: Detection of Mycobacterium avium paratuberculosis MAP: Real-time quantitative PCR methods to detect MAP the causal agent of Johne's disease at low numbers was developed.  Oligonucleotide primers and probes encoding the amplification of 50 to 65 base pair fragments of the DNA insertion sequence, IS900, unique for MAP were designed and optimized. Methods were developed to detect the presence of amplicons in both isolated DNA and whole cells of MAP.  We anticipate the detection of MAP in environmental samples in less than half-a-day instead of the 2-6 month period by the traditional culture methods.  Pathogen transfer to feed crops: Research examining factors that influence transfer of E. coli O157:H7 and Salmonella enterica Thompson to different cultivars typically grown for use as animal feed that are irrigated and/or fertilized with manure, and if contaminated waste application may be a means of increasing pathogen numbers on crops.  Significant differences in pathogen growth on the roots of the different cultivars was observed, but there was little transfer of pathogens to leaves.  The significance of this work are 1) cultivars may be selected to reduce the potential risk of pathogen re-growth on dairies, 2) evidence of some degree of host specificity for pathogens generally considered to be opportunistic invaders of agroecosystems is provided, and 3) the need to consider host genotype when interpreting work on pathogen: plant interactions is necessary.  C. Significant Accomplishments/Activities that Support Special Target Populations: 5. Describe your major accomplishments over the life of the project, including their predicted or actual impact?  Our group has developed a number of research directions related to understanding the biology of pathogens in food and environments crucial to food production.  These include production of reagents for detection of pathogens, pathogen reporter strains for studies of gene regulation, assays for measuring and tracking pathogens in food, identification of non-toxic anti-microbials, methods for fast and sensitive identification of pathogens, and the role of biofilms in pathogen survival.  It is anticipated that innovative methods for detecting pathogens in manure and other environments will be developed, and new methods for minimizing pathogens in the environment will be produced.  6. What do you expect to accomplish, year by year, over the next 3 years?  Year 1: Develop methods for separation and detection of bacterial pathogens in complex environments related to manure, water and compost.  Year 2: Determine the survival and proliferation of multiple human pathogens in manure and crop environments.  Develop methods for recovering and sampling pathogens in aerosols and fog.  Screen for novel anti- pathogen compounds suitable for use in manure management.  Year 3: Determine the life cycle of human pathogens transported from manure to soils and fruit and vegetable crops.  Determine the survival of pathogens in aerosols and resultant deposition of pathogens on plants.  Develop a prototype strategy for minimizing pathogens in manure and crops treated with manure and compost.  7. What technologies have been transferred and to whom?  When is the technology likely to become available to the end user (industry, farmer other scientist)?  What are the constraints, if known, to the adoption durability of the technology?  7.The project is new and we anticipate developing transferable technologies in the near future.  8. List your most important publications and presentations, and articles written about your work (NOTE: this does not replace your review publications which are listed below)
1. Ravva, S.V. Presentation to the Environmental Committee of the Almond Board of California on "Environmental factors affecting human pathogen survival and proliferation in manure and almond orchards." 11/16/01. Modesto, CA.
2. Duffy, B.K., Ravva, S.V. Discussed the "Efficacy of manure solids separation in nutrient conservation" to the members of Diamond D, Mellos and Dias Dairies and Structures Plus (a manure solid separation company). Kingsburg, CA.
3. Ravva, S.V. Presentation to the members of the Citrus Board of California on "Foodborne human pathogens in dairy environments." 11/16/01. Modesto, CA.
4. The work on manure solids separation and nutrients in manure has been quoted in "Hoards Dairyman."
5. Duffy, B., Sarreal, C., Stevenson, R., Ravva, S., Stanker, L. Regrowth of pathogenic bacteria in compost teas and risk of transmission to strawberry plants. Proceedings of 2002 International Symposium: Composting and Compost Utilization. 2002. Columbus, OH.
PUBLICATIONS: 1998/12 TO 2002/061.
1. Ravva, S.V., Duffy, B.K., Stanker, L.H., Mandrell, R.E. Foodborne pathogens in dairy environments. 30th United States-Japan Cooperative Program in Natural Resources (UJNR) Protein Resources Panel Meeting. October 15-19, 2001 in Tsukuba, Ibaraki, Japan. p. 64-71.
2. Stanker, L.H., Sheffield, C., Beier, R.C., Andreotti, P., Venkateswaran, K., McBride, M.T., Ravva, S.V., Duffy, B.K., Mandrell, R.E. Bacterial detection using sensitive immunological methods. 30th United States-Japan Cooperative Program in Natural Resources (UJNR) Protein Resources Panel Meeting, October 15-19, 2001 Tsukuba, Ibaraki, Japan. p. 33-40.

 

PROJ TYPE: USDA INHOUSE PROJ STATUS: NEW
START: 13 JUN 2002 TERM: 31 MAY 2006 FY: 2005
INVESTIGATOR: Mcgarvey J A; Ravva S V; Hernlem B J
PERFORMING INSTITUTION: Western Regional Research Center, Albany, California 94710
SUBJECT:  Control of pathogens in manure and transfer to plant environments.
OBJECTIVES: 1. To identify factors influencing survival and re-growth of human pathogenic bacteria in a dairy system, including transfer of pathogens from manure and manure by-products to crops.  2.  To identify bacterial populations in the manure environment.  3. To apply this information for designing pathogen control strategies that will be both effective and dairy-friendly.
APPROACH: Our overall approach will be to examine pathogenic and non-pathogenic bacteria presence, and their re-growth and transfer to agricultural crops during commercial dairy operations, test these hypotheses in laboratory/greenhouse studies using pathogens with bioluminescent and or antibiotic resistant markers and then evaluate laboratory based pathogen control technologies in field trials at commercial dairies.  Rapid, sensitive pathogen detection methodologies that are currently available will be adopted for evaluating the life cycle of pathogen transmission on a typical California dairy.  Methods for environmental detection of MAP and for pathogens in bio-aerosols and fog will be developed during these investigations.  Electroflotation: Design and evaluate bench-scale prototypes and apply to dairy lagoon fluids and process samples to define contaminant removal in relation to substrate composition selection of electrode, electrolytes (chloride, nitrate, nitrite, sulfate, etc.).
FORMERLY:5325-32000-002-00D; 5325-42000-023-00D. 5325-42000-028-00D combined into this project(4/04).
PROGRESS: 2003/10 TO 2004/09  1. What major problem or issue is being resolved and how are you resolving it (summarize project aims and objectives)?  How serious is the problem?  What does it matter?  Americans suffer from 76 million cases of food poisoning each year, causing 5,000 deaths, and costing $7 billion in lost productivity.  Most food poisoning is caused by bacteria such as those present at high levels in manure.  These include strains of E. coli, Salmonella, and Campylobacter.  Livestock also suffers from transfer of bacterial pathogens, including Mycobacterium avium paratuberculosis, responsible for Johne's Disease in cattle.  Farm animals and their manure are often present at high density near croplands.  Microbes from manure may be transferred to crops by aerosol, especially in dust-, wind- and fog-prone areas.  In addition, manure is often used as fertilizer on crops for animal feed and fodder, as well as crops intended for human consumption.  This can allow direct contact between manure and food/feed, as well as causing widespread contamination of soil.  Over 80 million tons of animal manure are produced each year in the US.  Proper management of this resource is important to minimize infection of farm animals, contamination of farm facilities and equipment, and transfer to food and feed.  Treatments such as composting of solids can significantly reduce levels of potentially harmful bacteria in manure.  But handling may also create aerosols.  Ideal methods for manure treatment may be relatively expensive and unwieldy, especially for small- to medium- scale commodity farm economics, so a practical approach is necessary.  We are comparing effectiveness and cost of various methods for handling and treatment of manure, specifically to reduce transfer of pathogens from manure to crops.  This research falls under National Program 108, Food Safety.  Specifically this research addresses the following goals in the National Program Action Plan: 1.1.1 Sampling, isolation, identification and quantification of pathogens in animal fluids and tissues, manure; and the environment, including feed, water, and wild animals.  1.2.1 Ecology and assessment of risk factors of pathogens in food producing animals, including those carrying antibiotic resistance, outside of the host animal.  1.6.1 Determine how food safety is affected by manure handling and utilization.  2. List the milestones (indicators of progress) from your Project Plan.  Year 1 (FY02) Isolation of microbes from manure. Characterization of pathogens in manure.  Assays for pathogenic E. coli in manure.  Year 2 (FY03) Laboratory models of manure lagoons.  Assays for M. a. paratuberculosis in manure.  Year 3 (FY04) Culture methods for M. a. paratuberculosis  Factors influencing pathogen regrowth on plants.  Year 4 (FY05) Aeration treatment of manure lagoons.  Electroflotation treatment of manure lagoons.  Sampling microbes from aerosol and fog.  3. Milestones: The following milestones were scheduled for FY04 and were fully met: Culture methods for M. a. paratuberculosis.  Factors influencing pathogen regrowth on plants.  The following two milestones are planned for FY05: Aeration treatment of manure lagoons.  A few commercial-scale lagoons have already been studied for population dynamics of E. coli, Salmonella, and Campylobacter with various rates of aeration.  We will study M. a. paratuberculosis in this setting, and also identify microorganisms that reduce odor.  Electroflotation treatment of manure lagoons.  This technology is being added from a food processing water project.  We will determine whether electroflotation is a practical treatment for lowering pathogen levels of M a. paratuberculosis, E. coli O157:H7 and Salmonella pathogens in manure lagoons.  This project will undergo OSQR with new Project Objectives beginning FY06.  Year 5 (FY06) Role of bacteriophage in pathogen survival in manure lagoons.  We will determine whether bacteriophage activity affects survival and proliferation of E. coli.  Sampling microbes from aerosol and fog.  New efficient high-throughput air sampling devices will be used for capture of M. a. paratuberculosis, E. coli O157:H7 and Salmonella microbes.  Special cultures and assays will study the prevalence of pathogens in air at various distances from sites of intensive manure production and handling.  Year 6 (FY07) Determine whether aerosol transported M. a. paratuberculosis, E. coli O157:H7 and Salmonella survive and proliferate in crop environments, especially the rhizosphere.  Examine seasonal variations of pathogens in manure lagoons and crop rhizosphere.  Evaluate a prototype electroflotation device on a dairy farm.  Monitor surrogates (and pathogens, if any) and nutrient levels.  Evaluate solar powered devices to reduce operating costs.  4.  What were the most significant accomplishments this past year?  Determining biological factors for pathogen survival and proliferation in manure lagoons is critical in developing intervention strategies for on- site pathogen control.  Scientists in the FCR, WRRC, Albany, CA. introduced E. coli O157:H7 into samples of manure lagoon water from Prins Dairy (Oakdale, CA) and monitored survival of the introduced pathogen as well as native protozoa.  We found that protozoan populations proliferated, while pathogens declined to undetectable levels during eight days of incubation.  Thus, encouraging the growth of protozoans may lead to improvement in pathogen control in manure.  B. Other significant accomplishment(s), if any. FCR Scientists studying manure lagoons noticed that those with circulators have a distinct pink coloration and noticeably less odor compared to static lagoons.  They took samples back to the lab and characterized the organisms responsible for the color.  Although previously undescribed, these novel bacteria (Thiocapsa and Achromatium spp.) appear related to species known to consume volatile organic compounds (VOC).  We are now investigating these organisms, their metabolism, and their potential role in reduction of odor and VOC.  C. Significant activities that support special target populations.  While making field observations and gathering samples for analysis, we have frequent conversations with dairy farmers and vendors of farm equipment, answering their questions about technology and feasibility.  We often participate in more formal presentations, such as the following: McGarvey J (2004) "Analysis of dairy waste water, a molecular approach", Presented to Natural Aeration Inc., Innovative Approaches to Nutrient Cycling Field Day in Modesto, CA. McGarvey J (2004) "Bacterial community structure of dairy waste water", Presented to The Ohio State University.  D. Progress Report opportunity to submit additional programmatic information to your Area Office and NPS (optional for all in-house ("D") projects and the projects listed in Appendix A; mandatory for all other subordinate projects).  Growing industry, public, and scientific interest in M. a. paratuberculosis is steering our efforts toward this difficult-to-culture pathogen, especially in dairy agriculture.  5.  Describe the major accomplishments over the life of the project, including their predicted or actual impact.  Field studies and inoculation experiments in laboratory models suggest dairy manure lagoons are not conducive for growth of E. coli O157:H7 and Salmonella enterica pathogens.  S. enterica declined faster from aerated manure water, while E. coli O157:H7 populations declined similarly from both aerated and non-aerated waters.  This indicates that regrowth of these organisms may be the major factor in pathogen transfer.  Action Plan components 1.2.1.1, 1.6.1.1, and 1.6.1.2.  Pathogens grow rapidly during the traditional methods of making compost teas supplemented with molasses.  Essential oils and natural products inhibit pathogen re-growth in compost teas.  Action Plan component 1.6.1.4.  Developed new immunochemical and molecular methods for sensitive detection of M a. paratuberculosis.  This technology should also prove useful for concentration of M. a. paratuberculosis in dilute environmental samples, making detection and quantitation faster and cheaper.  Action Plan component 1.1.1.2.  6. What science and/or technologies have been transferred and to whom?  When is the science and/or technology likely to become available to the end- user (industry, farmer, other scientists)?  What are the constraints, if known, to the adoption and durability of the technology products?  While we are working with several vendors of manure treatment (solids separation and aeration) equipment, we have not transferred any new science/technology.  We are evaluating and refining existing commercialized technologies for their effects on pathogen populations.  Farmers naturally focus on optimization of production of their commodity, rather than on manure.  Furthermore, manure management practices that provide ideal levels of pathogen reduction are relatively expensive and impractical.  We are studying implementations that vary in size and complexity, in order to be able to provide cost-benefit information to stakeholders.  These results will be published and presented in FY05. 7.  List your most important publications in the popular press and presentations to organizations and articles written about your work. Stanker LH, Silva CJ, Onisko BC, McGarvey JA, and Ravva SV 2003 New challenges in food safety: Prions and risk factors associated with prion disease and animal manure as a pathogen, Annual meeting of the United States-Japan Cooperative Program in Natural Resources Panel on Toxic Microorganisms.
PUBLICATIONS: 2003/10 TO 2004/091.
1. Duffy, B., Sarreal, C., Stevenson, R., Ravva, S., Stanker. L. Regrowth of pathogenic bacteria in compost teas and risk of transmission to strawberry plants. F.C. Michel, Jr., R.F. Rynk and H.A.J. Hoitink,editors. The JG Press, Inc., Emmaus, PA. Proceedings of 2002 International Symposium: Composting and Compost Utilization, 2002. p. 1142-1149. Available from http://www.composting.2002.org
2. Stanker, L.H., Ravva, S.V. Survival of E.coli O157:H7 in aerated dairy manure lagoons. In Proceedings of the 31st United States-Japan Cooperative Program in Natural Resources (UJNR) Protein Resources Panel Meeting. December 1-7, 2002. Monterey, CA.
3. Mcgarvey, J.A., Bermudez, L.E. 2004. Differential gene expression in mononuclear phagocytes infected with pathogenic and non-pathogenic mycobacteria. [No Journal name given] 136(6):490-500.

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT PROJ STATUS: NEW
START: 07 MAR 2005 TERM: 31 DEC 2006 FY: 2005
INVESTIGATOR: Mcgarvey J A; Mitloehner F; Zhang R
PERFORMING INSTITUTION:  University of California. Davis, California 95616
SUBJECT:  Characterization of dairy waste management strategies with regard to pathogens and air quality.
OBJECTIVES: The goal of this project is to compare dairy waste treatment methodologies, especially varying levels of aerobic and anaerobic treatment, as well as wastewater lagoon circulation, aeration and covering for the reduction of pathogens and volatile compound emission.  These studies will provide greater understanding of how pathogens persist or are destroyed under various conditions and simultaneously elucidate the type of volatile organic compounds that are emitted during treatment.  The studies will involve lab scale aerobic and anaerobic digesters, as well as on site dairy waste lagoon experiments conducted at an operating dairy, and thus real world conditions.  The results of these studies will have impact on the way diary waste is treated for both human health and environmental considerations.
APPROACH: Dairy waste treatment methodologies are of concern because of human illnesses caused by pathogens within manure and because of volatile organic gas emissions which cause poor air quality in and around dairy operations.  Pathogens such as E. coli O157:H7. Salmonella spp., Campylobacter spp. etc. have caused outbreaks associated with improper diary waste treatment.  In addition, improper treatment of diary waste can emit volatile chemicals into the atmosphere, including volatile fatty acids (VFAs), volatile organic compounds (VOCs), and ammonia.  Furthermore, improper application of diary waste to crop fields can result in the accumulation of sodium chloride, phosphate, nitrate and nitrite.  These chemicals not only impact crop production, but also leach into ground water making it unsuitable for human or animal consumption.  To better understand how dairy waste can be treated to eliminate pathogens, and decrease air emissions and unwanted groundwater leaching, we will initiate bench scale aerobic and anaerobic digester experiments.  We will feed raw diary waste (manure and urine) into aerobic and anaerobic reactors under different parameters such as temperature, amount of dissolved oxygen, redox potential, retention time, etc. and analyze the starting material and effluent for microbial content.  We will also collect gasses emitted from the waste treatment systems and analyze their chemical composition using GC/MS.  We will conduct experiments with manure that has been spiked with known amounts of pathogenic bacteria including Salmonella, E. coli O157:H7, Mycobacterium avium subsp. paratuberculosis, etc. to determine the effect these methodologies have on pathogen growth and survival.  Lastly we will conduct experiments on a working 800-cow dairy farm.  This farm is uniquely suited for experiments on waste treatment methodologies because it has two waste lagoons that receive waste from the same source, but are run independently of each other, thus providing an experimental treatment lagoon and a control lagoon.  We will treat one lagoon under conditions found to be ideal for the reduction of pathogen and volatile organic compound emission, and chemical changes as they evolve.  This work will not only provide proof of principal in lab experiments but will show how these concepts correlate to real world conditions on a working dairy. Documents SCA with UC-Davis.

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 OCT 2001 TERM: 30 SEP 2006 FY: 2005
INVESTIGATOR: Cullor, J. S.
PERFORMING INSTITUTION: Population Health & Reproduction, University of California (Vet-Med) Davis, California 95616.
SUBJECT:  The use of micro-colony PCR for detection of Mycobacterium paratuberculosis from bovine manure.
NON-TECHNICAL SUMMARY: Detection of M. paratuberculosis in young cattle continues to be difficult using current tests.  In an effort to improve the sensitivity and specificity of PCR for Johne's disease screen assays, we plan to investigate a micro-colony PCR detection method.
OBJECTIVES: Our objective is to assess and optimize the PCR confirmation of M. paratuberculosis microcolonies.  The primary hypothesis to be tested is that PCR analysis can be performed on micocolonies of M. paratuberculosis appearing between 7-14 days after spirally plated on Middlebrook agar plates.  The use of PCR on micro-colonies will circumvent the problems of sensitivity and PCR inhibition when this technique is used directly on broth cultures, manure or tissues.
APPROACH: Bovine manure from clinically normal cows will first be spiked with up to 1x10(8) CFU/g of M. paratuberculosis and decontaminated via the standard protocol used by the California Animal Health Food Safety Laboratory (CAHFS, Davis CA).  After the decontamination step, the samples will be spirally plated onto Middlebrooks 7H10 agar plates for micro-colony morphology detection.  The spiral plates will be incubated at 37 degrees centigrade and examined weekly for M. paratuberculosis growth.  The resulting micro-colonies will be "picked" from the spiral plates and the DNA extracted from them.  PCR amplification using an automated LightCycler and M. paratuberculosis specific primers will then be performed with results of a typical 30cycle reaction obtainable within 30 minutes.  Primer concentration, MgCl concentration, annealing temperatures and cycle numbers will all be assessed and adjusted for maximum sensitivity and specificity. PROGRESS: 2005/01 TO 2005/12  The primary objective of this project is to determine the limit of detection of a wash culture plate assay coupled with real time PCR on bovine manure spiked with viable cells of Mycobacterium paratuberculosis (MAP) (the Johne's agent).  To date varying concentrations of a laboratory MAP broth culture have been spiked into bovine manure and then concentrated using a modified version of the conventional culture NADC method (Stabel, 1997).  The spiked samples have been spirally plated onto agar plates.  After a plate incubation time of 3 days the surface of the plates have been washed and concentrated into a pellet by centrifugation.  The DNA from the resulting pellet has been extracted and subjected to real time MAP PCR.  Thus far, the limit of detection of this assay is ~10 CFU/g after only 3 days incubation, which compares very favorable to conventional culture assays that may take many months to detect about 100 CFU/g. IMPACT: 2005/01 TO 2005/12.  The preliminary results may indicate that screening culture plates via PCR can substantially increase both the sensitivity of the detection as well as the turn around time for results compared to conventional culture.  This may help facilitate whole herd testing which is important in efforts to control the spread of the disease on the farm.
PUBLICATIONS: 2005/01 TO 2005/12
No publications reported this period.
PROJECT CONTACT:
     Name: Cullor, J. S.  Phone: 559-688-1731.  Fax: 559-686-4231

     Email
: mailto:jscullor@ucdavis.edu

     
URL: http://www.vmtrc.ucdavis.edu/dfsl/dfsl.html

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 98-35204-6535 PROPOSAL NO: 9802523
START: 01 DEC 1998 TERM: 30 NOV 2002 FY: 2003 GRANT YR: 1998
GRANT AMT: $149,906
INVESTIGATOR: Gardner, I. A.
PERFORMING INSTITUTION:  Medicine and Epidemiology.  University of California (Vet-Med).  Davis, California 95616
SUBJECT:  Test dependence affects diagnosis and surveillance of animal disease.
OBJECTIVES: 1. To determine the effects of conditional dependence of test sensitivity when combinations of tests are used for individual and herd diagnosis.  2. To estimate sensitivity and specificity of two or more tests in combination when there are more than two populations and no Gold standard.
APPROACH: To achieve Objective #1, we will use existing data on tests for bovine paratuberculosis, swine brucellosis, swine toxoplasmosis and beta-lactan residues in low milk.  As a model for other diseases, we will determine the optimal combination of tests to determine an individual's and herd's paratuberculosis status, incorporating decision and cost-benefit analyses, where ever appropriate.  For Objective #2, we will evaluate data sets that include results for multiple tests for paratuberculosis and other animal diseases and use the estimation-maximization algorithm and Gibbs sampler to perform calculations.
PROGRESS: 1998/12 TO 2002/11.  We have implemented a Bayesian method for estimation of sensitivity and specificity when there are 2 correlated (dependent) tests and 2 populations with different prevalences and the true disease status is unknown (i.e. there is no gold standard).  All uncertainty in the accuracy of tests and disease prevalence is modeled through the use of probability distributions.  Our previous work identified that a positive correlation between test results lead to an overestimation of the accuracy of both tests using traditional statistical methods that assume that the tests are conditionally independent (uncorrelated).  Correlation typically occurs when the 2 tests measure similar biologic processes e.g. serum antibody responses.  The model has been applied to the evaluation of 2 serologic tests for toxoplasmosis in pigs and we have shown that the model yields unbiased estimates of test sensitivity and specificity.  We have developed a web-based interface using an HTML form for implementation of methods to estimate test sensitivity and specificity in the absence of a gold-standard.  The programs can incorporate data obtained from several populations, results of multiple tests and can account for data from a reference population in which the true status (infected or not infected) or each individual is known exactly.  Two estimation methods are used and both assume test independence conditional on the infection status of individuals and constant test accuracy in each population.  The program is available at www.epi.ucdavis.edu/diagnostictests/
IMPACT: 1998/12 TO 2002/11  The development of a web-based program will allow for more widespread implementation of these methods by scientists involved in the assessment of accuracy of animal diagnostic tests.
PUBLICATIONS: 1998/12 TO 2002/11
1. Gardner IA, Stryhn H, Lind P, Collins MT. Conditional dependence affects the diagnosis and surveillance of animal diseases. Prev Vet Med 2000; 45: 107-122.
2. Hanson TE, Johnson WO, Gardner IA. Log-linear and logistic modeling of dependence among diagnostic tests. Prev Vet Med 2000; 45: 123-137.
3. Enoe C, Georgiadis MP, Johnson WO. Estimation of the sensitivity and specificity of diagnostic tests and disease prevalence when the true disease state is unknown.  Prev Vet Med 2000; 45: 61-81.
4. Pouillot R, Gerbier G, Gardner IA. "TAGS", a program for the evaluation of test accuracy in the absence of a gold standard. Prev Vet Med 2002; 53(1-2):67-81.
5. Hanson TE, Johnson WO, Gardner IA. Hierarchical models for the estimation of disease prevalence and the sensitivity and specificity of dependent tests in the absence of a gold standard. J Agric Biol Environ Stat 2002 (in press).
6. Georgiadis MP, Johnson WO, Singh R, Gardner IA. Correlation-adjusted estimation of sensitivity and specificity of two diagnostic tests. Appl Stat 2002 (in press).

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 2001-35204-10874 PROPOSAL NO: 2001-02494
START: 15 OCT 2001 TERM: 31 OCT 2003 FY: 2005 GRANT YR: 2002
GRANT AMT: $205,000
INVESTIGATOR: Gardner, I. A.; Salman, M.; Johnson, W. O.
PERFORMING INSTITUTION:  Medicine & Epidemology. University of California (Vet-Med).  Davis, California 95616
SUBJECT:  Certification of disease freedom in animal populations: use of Bayesian methods.
NON-TECHNICAL SUMMARY: Trade in animals and animal products is in part dependent on the validity of assurances that exporting herds and countries provide about the infection status of their animals.  Our objective is to develop Bayesian models that can be used to make improved inferences about freedom from infection for a single herd or multiple herds in a country/region.  We will use beta distributions to model uncertainty and variability in test sensitivity and specificity, and prevalence.  For the single-herd model, we will use bovine paratuberculosis as our example because of current interest in the Voluntary Johne's Disease Herd Status Program (VJDHSP) and the difficulties inherent in differentiating low prevalence from non-infected herds.  For the multiple-herd model, we will use survey data on porcine reproductive and respiratory syndrome, infectious bovine rhinotracheitis and bluetongue to validate our model.  There are often extensive surveillance data that can complement negative survey findings, but there are no standardized methods for incorporating these data into assessment of freedom from infection.  Our final objective is to develop Bayesian methods for incorporation of non-survey data and adjustment for time-dependent changes in the quality of survey and surveillance data.  We will use data on bovine spongiform encephalopathy, brucellosis and tuberculosis for these assessments.  The methods developed will be adaptable to most infectious livestock diseases, including those of interest to commodity groups such as the VJDHSP and to those that are federally regulated such as brucellosis.
OBJECTIVES: To develop Bayesian methods for: (1) Certification of the status of a single herd with respect to prevalence and freedom from infection (incorporating the prior probability of infection and uncertainly and variability in test sensitivity and specificity).  (2) Certification of status of a group of herds with respect to within-herd prevalence, proportion of infected herds and freedom from infection (incorporating the prior probability of infection, uncertainty and variability in test sensitivity and specificity, and the possible clustering of positive test results at the herd level).  (3) Incorporation of non-survey data and adjustment for time-dependent changes in the quality of survey and surveillance data.
APPROACH: We will use beta distributions to model uncertainty and variability in test sensitivity and specificity, and prevalence.  Gibbs sampling will be used to combine prior distributions and herd-level test results into a posterior prevalence distribution.  For the single-herd model, we will use bovine paratuberculosis as our example because of current interest in the Voluntary Johne's Disease Herd Status Program (VJDHSP) and the difficulties inherent in differentiating low prevalence from non-infected herds.  For the multiple-herd model, we will use survey data on porcine reproductive and respiratory syndrome, infectious bovine rhinotracheitis and bluetongue to validate our model.  PROGRESS: 2001/10 TO 2003/10.  Trade in animals and animal products is in part dependent on the validity of assurances that exporting herds and countries provide about the infection status of their animals.  We developed Bayesian hierarchical models for determining infection status and infection prevalence given testing of all or a sample of animals from a single herd with an imperfect test.  Expert prior information about herd infection status, diagnostic test accuracy are incorporated into the model.  Posterior versus prior probabilities are presented as a curve, summarizing the probability of infection over a range of possible prior probability values.  The model has been applied to serologic data for paratuberculosis in dairy herds.  For the multiple herd setting, we created a model that allows for 3 levels of inference: probability that a country (region) is free of infection, the proportion of infected herds in an infected country, and the within-herd prevalence.  The model uses test results from animals sampled in a two-stage cluster sample of herds.  The model was validated with simulated data and applied to surveys of Newcastle disease and porcine reproductive and respiratory syndrome virus infection.  A Bayesian sample size calculator was constructed to incorporate prior test results and other information to provide guidance as to appropriate numbers for herd testing programs.  Because of the complexity of calculations, we wrote a software program (BDFree) that is available at www.epi.ucdavis.edu/diagnostictests/.  We have written code in WinBUGS for Bayesian inference about animal and herd prevalence of infectious diseases for a variety of different sampling and testing scenarios.  In addition, we investigated methods of estimation of the intracluster correlation coefficient (ICC) for infectious animal diseases.  We demonstrated that the ICC based on apparent infection status for individuals is less than or equal to the ICC based on true infection status.  We developed a Bayesian model for estimating the ICC that incorporates imperfect test accuracy and applied the model to a NAHMS seroprevalence survey of ovine progressive pneumonia.  Two analytical models were constructed to determine the likelihood of freedom from an infectious disease using existing surveillance data, rather than use of survey data, as in the prior scenarios.  The two models were explored using Danish data from the surveillance program for infectious bovine rhinotracheitis.  The relationship between within-herd prevalence and animal-level prevalence was investigated to derive a reliable estimate of a herd prevalence of a given disease.  The distribution impact of the within-herd prevalence as determined by animal-level prevalence and the intracluster correlation coefficient on herd-level sensitivity and specificity was modeled.  A sample size formula, dependent on herd-level sensitivity and specificity, was proposed for estimating herd-level prevalence in a two-stage sampling design. The use of a distribution for within-herd prevalence resulted in a conservative estimate of herd-level test characteristics.
IMPACT: 2001/10 TO 2003/10.  An international workshop was organized by the team and held in Copenhagen, Denmark in March 2003.  The aim of this workshop was to address issues and terms related to international rules and regulations for declaring a country free from a disease.  Terms and definitions were agreed on by the participants.  Current methods and techniques used by our research team were recognized as the most advanced available and as valid approaches for declaring a country free from a disease.  An international training course was offered in November 2003 in association with the 10th ISVEE meeting in Chile.  One goal of the workshop was to legitimatize the techniques that were developed and evaluated by our research team and make these techniques available to participants from many countries.  Dr. Zepeda participated in the OIE working group to draft a comprehensive chapter for surveillance methods to be used by OIE members.  A major component of this chapter is devoted to surveillance methods to declare a country free from a disease.  Techniques that are being currently researched by our team were included in the draft of this chapter.  Our team will incorporate the outcome from the assessment of these techniques in the final draft of this chapter.  The utility of Bayesian methods was promoted in a leading article in a major veterinary journal.  We are working with the National Pork Board to make our approach available relative to herd certification for toxoplasmosis, to those interested in the Voluntary Johne’s Disease Herd Status Program relative to herd certification for paratuberculosis.
PUBLICATIONS: 2001/10 TO 2003/101.
1. Suess EA, Gardner IA, Johnson WO. Hierarchical Bayesian model for prevalence inferences and determination of a countrys status for an animal pathogen. Prev Vet Med 2002; 55:155-171
2. Gardner IA.The utility of Bayes theorem and Bayesian inference in veterinary clinical practice and research. Aust Vet J 2002; 80:758-761
3. Hanson TE, Johnson WO, Gardner IA. Determining the infection status of a herd. J Agric Biol Environ Stat  2003; 8:469-485
4. Doherr MG, Audige Salman MD, Gardner IA. Use of animal monitoring and surveillance systems when the frequency of health-related events is near zero. Animal Disease Surveillance and Survey Systems: Methods and Applications. M.D. Salman, ed. Iowa State Press 2003, pp135-147
5. Salman MD. Improvement of survey and sampling methods to document freedom from diseases in Danish cattle population on both national and herd levels. Technical report (project 5), 2003, available at http://www.dfvf.dk/Default.asp?ID=9726
6. Johnson WO, Su CL, Gardner IA, Christensen R. Sample size calculations for surveys to substantiate freedom of populations from infectious agents. Biometrics 2004;60:165-171
7. Branscum AJ, Gardner IA, Johnson WO. Bayesian modeling of animal- and herd-level prevalences. Prev Vet Med 2004; 66:101-112
8. Chriel M, Salman M.D., Wagner B. Improvement of surveillance and sampling methods to document freedom from infectious bovine rhinotracheitis in the Danish cattle population. Prev Vet Med 2004 (submitted)
9. Branscum AJ, Gardner IA, Wagner BA, McInturff PS, Salman MD.  Effect of diagnostic testing error on intracluster correlation coefficient estimation. Prev Vet Med 2004 (submitted)
10. Branscum AJ, Johnson WO, Gardner IA. Bayesian approach to sample size calculations for studies designed to estimate sensitivity and specificity. Prev Vet Med 2004 (submitted)
PROJECT CONTACT:
     Name: Gardner, I. A.  Phone: 530-752-6992  Fax: 530-752-0414  
     Email
: iagardner@ucdavis.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 15 APR 2005 TERM: 14 APR 2009 FY: 2005
INVESTIGATOR: Gardner, I. A.; Adaska, J. M.; Whitlock, R. H.
PERFORMING INSTITUTION:  Medicine & Epidemology.  University of California (Vet-Med).  Davis California   
SUBJECT:  Environmental sampling to assess the bio-burden of California dairies.
NON-TECHNICAL SUMMARY: There are many deficiencies in existing knowledge about the transmission and detection of Map in cattle herds, including how to most effectively use currently-available tests for diagnosis of Map infection.  This project will assess persistence of the Map on dairy farms and methods for quantification of bioburden.
OBJECTIVES: 1. To quantify and evaluate the role of the environmental bio-burden of Mycobacterium avium subsp. paratuberculosis (Map) in the transmission of Johne's disease on dairy farms.  2. To evaluate optimal testing strategies for detection of Map in dairy herds.
APPROACH: Objective 1, numbers of Map bacteria in multiple environmental locations in dairy herds will be quantified using Herrold's egg yolk medium and the Trek ESP II system.  Cultures which yield values that are very high shedders will be quantified further by serial dilution to estimate the most probable numbers of bacteria in the samples.  Objective 2, a stochastic simulation model will be modified to evaluate various testing (including use of environmental samples) and sampling methods for detection of Map in dairy herds.
PROGRESS: 2005/01 TO 2005/12.  The specific objectives of the study are to 1) quantify concentrations of Map, as measured by culture on Herrolds egg yolk medium (HEYM) and in liquid culture (Trek ESP II), in environmental samples including recycled lagoon water used for flushing cow alleyways, 2) collect environmental Map data biannually with the goal of correlating changes in current values with changes in cohort specific Map risk when females born in the herd at the time of sampling are in the second or later lactation, and 3) quantify the Map colony counts on HEYM tubes where results are recorded as too numerous to count (TNTC), equivalent to approximately more than 70 colonies per tube.  We started our investigation in a dairy with about 2700 lactating cows (aggregated in 12 strings), 300 dry cows and about 150 pregnant heifers.  Currently, fecal culture prevalence and ELISA seroprevalence of cows (n=976) at dry-off are 9.4% and 4.6%, respectively.  Testing of fecal slurry samples in February 2005 collected from alleyways using a standardized protocol showed that 100% (12/12) were positive on HEYM, including 25% (3/12) alleyways had at least one HEYM tube that had Map colonies that were TNTC.  Repeat testing of the herd in October 2005 using the Trek ESP II system yielded similar findings.  In November 2005, we investigated logistical aspects of detection of TNTC cows in this herd.  All environmental samples were positive by quantitative real-time (qrt) PCR and one sample was positive using the qualitative PCR available through the Minnesota Diagnostic Laboratory.  We are currently doing follow-up testing of 3 strings identified as having different likelihoods (high, moderate and low, respectively) of having cows that are shed Map.  Group-level serum ELISA results correlated well with qrtPCR data.  Samples from 17 ELISA positive cows within these strings were submitted for HEYM culture and qrtPCR testing in December 2005.  
IMPACT: 2005/01 TO 2005/12.  Cows shedding large numbers of Map pose a tremendous risk for transmitting the organism to other cattle on the farm, and they may also contribute to passive (pass through) fecal shedding of Map by uninfected cows, and thus false-positive fecal culture results.  That some fecal culture results (low and moderate shedders) might be false positives is a major paradigm shift for management of bovine paratuberculosis and also has implications for evaluation of serologic tests for Map because most investigators use fecal culture as the gold standard.
PUBLICATIONS: 2005/01 TO 2005/12.
Berghaus RD, Farver TB, Anderson RJ, Jaravata CC, Gardner IA.  Environmental sampling for detection of Mycobacterium avium ssp. paratuberculosis on 23 large California dairies. J Dairy Sci 2006; 89: 963-970.
PROJECT CONTACT:     
     Name
: Gardner, I. A.  Phone: 530-752-6992.  Fax: 530-752-0414
     Email
: iagardner@ucdavis.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: EXTENDED
CONTRACT/GRANT/AGREEMENT NO: 2003-35204-13374 PROPOSAL NO: 2003-02398
START: 01 AUG 2003 TERM: 31 JUL 2006 FY: 2005 GRANT YR: 2003
GRANT AMT: $157,000
INVESTIGATOR: Gardner, I. A.; Johnson, W. O.
PERFORMING INSTITUTION:  Medicine & Epidemology.  University of California (Vet-Med)  Davis, California 95616
SUBJECT:  Novel methods for improved classification of herd disease status with applications to bovine paratuberculosis.
NON-TECHNICAL SUMMARY: Correct classification of herd status for animal pathogens is an integral component of disease control programs, risk-factor studies, health certification programs, and risk analyses related to animal movements.  Our long-term research goal is to develop new methods to assess test accuracy for animal diseases, to improve classification of herd disease status and apply these methods to herd testing for bovine paratuberculosis.  First, we will develop methods that use quantitative test results in the overall assessment of herd-level sensitivity and specificity.  To achieve this objective we will use ELISA values for paratuberculosis infected and non-infected cattle and develop a generalized linear model that includes animal and herd-level risk factors.  Second, we will develop Bayesian methods for estimating the herd-level sensitivity and specificity of testing systems for animal diseases when there are two conditionally independent or dependent tests.  We expect that Bayesian methods will be superior to traditional frequentist methods for assessing the accuracy of herd-level tests when there is no "gold standard" and where tests are conditionally dependent.  We will use paired ELISA and fecal culture results from three paratuberculosis studies.  We will assess cut-off dependent and independent approaches for herd classification.  Methods developed in the proposed research will be applicable to many infectious animal diseases where quantitative test results are available and where herd-level interpretation of test results in the basis of classification of disease risk.
OBJECTIVES: Develop and apply methods that account for the quantitative nature of test results in the overall assessment of herd-level sensitivity and specificity.  Develop and apply Bayesian methods for estimating the herd-level sensitivity and herd-level specificity of testing systems for animal diseases when there is one test or two conditionally independent or dependent tests. APPROACH: For objective 1, we will develop a general linear mixed model that discriminates the quantitative test scores from infected and non-infected animals.  The model will allow for the possibility of animal-level risk factor (covariate) information such as age, lactation number, an indicator of purchased versus raised etc., and for herd-level information such as average age, type of ownership etc.  In addition, we will extend this univariate model to a multivariate model that allows for several diagnostic tests.  The model will be applied to ELISA and culture data for bovine paratuberculosis.  Once this initial study is completed using "gold standard" information, we will extend the problem to the situation where the true status of individual animals is unknown.  This will be achieved with use of a "mixture" model that is based on weighted average of the densities of test results corresponding to infected and non-infected animals.  For objective 2, we will develop and compare cutoff-based and cutoff-independent methods of assessing herd-level sensitivity and specificity.  The latter method allocates a herd as positive if the posterior probability that the herd is infected, given all observed data, is larger than a specified value e.g. 95%.  The methods will be applied to one test in a single population, two tests in one population, and two tests in two or more populations.  We will also allow for the possibility of sequential and simultaneous use of multiple tests.  Our Bayesian approach will involve Gibbs sampling, a Markov chain Monte Carlo simulation technique, that allows for incorporation of existing information about test sensitivity and specificity, and disease prevalence.
PROGRESS: 2005/01 TO 2005/12.  Our long-term goal is to develop new methods to assess test accuracy for animal diseases, to improve classification of herd disease status and apply these methods to herd testing for bovine paratuberculosis.  As part of our first objective, we developed and applied Bayesian methods for estimating the herd-level sensitivity and herd-level specificity of testing systems for animal diseases when there is one test or two conditionally independent or dependent tests.  We considered 4 different sampling schemes: a single test case and three sequential test cases.  The corresponding herd-level characteristics were calculated and compared with different sample sizes, sampling schemes, animal-level sensitivity, specificity, and cut-off values.  Models were developed to incorporate animal or herd-level risk factors and models with small herd size are also considered.  We compared posterior estimates of animal and herd-level characteristics for these four sampling schemes with simulated data.  Two examples, one for bovine paratuberculosis and a second for Salmonella in pig herds, were used to demonstrate application of the methods in field studies (Su et al., 2006).  As part of our second objective, we developed a Bayesian approach to sample size calculations for cross-sectional studies designed to estimate sensitivity and specificity of one or more diagnostic tests.  Sample size calculations can be made for common study designs such as one test in one population, two conditionally independent or dependent tests in at least 2 populations, and three tests at least 2 populations.  We determined a sample size combination that yields high predictive probability, with respect to the future study data, of accurate and precise estimates of sensitivity and specificity.  We also consider hypothesis testing for demonstrating the superiority or equivalence of one diagnostic test relative to another.  The predictive probability can also be computed when the sample size combination is fixed in advance, thereby providing a power-like measure for the future study.  The method is straightforward to implement using the S-Plus/R library emBedBUGS together with WinBUGS (Branscum et al., 2006).
IMPACT: 2005/01 TO 2005/12.  Correct classification of herd status for animal pathogens is an integral component of disease control programs, risk-factor studies, health certification programs, and risk analyses related to animal movements.  This classification is primarily dependent on the interpretation of diagnostic tests results at the herd-level.  Our approach is based on Bayesian methods which allow incorporation of prior information and knowledge about test performance into the current study.  Our research findings allow users greater flexibility in study planning and data analysis than are sometimes available with traditional statistical approaches.  Wherever possible, we have written code in the shareware program WinBUGS so that it can be used widely.  Code for these problems is available to users on our website, www.epi.ucdavis.edu/diagnostictests/
PUBLICATIONS: 2005/01 TO 2005/12
1. Branscum AJ, Johnson WO, Gardner IA. Sample size calculations for studies designed to evaluate diagnostic test accuracy. J Agric Biol Environ Stat 2006 (in press).
2. Choi YK, Johnson WO, Collins MT, Gardner IA. Bayesian inferences of receiver operating characteristic curves in the absence of a gold standard. J Agric Biol Environ Stat 2006 (in press)
3. Su, CL, Gardner IA, Johnson WO. Bayesian estimation of aggregate test accuracy based on different sampling schemes. J Agric Biol Environ Stat 2006 (tentatively accepted)
PROJECT CONTACT:     
     Name: Gardner, I. A.  Phone: 530-752-1363.  Fax: 530-752-0414
     
Email: iagardner@ucdavis.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: TERMINATED
START: 01 OCT 2000 TERM: 30 SEP 2004 FY: 2003
INVESTIGATOR: Gardner, I. A.
PERFORMING INSTITUTION: Medicine & Epidemology.  University of California (Vet-Med)  Davis, California 95616
SUBJECT:  Quantitative methods to certify freedom of animals from pathogens.
NON-TECHNICAL SUMMARY: If countries and regions are able to "certify" freedom from important animal pathogens, trade opportunities may increase and product export costs may decrease.  To develop a Bayesian statistical approach (using Gibbs sampling) to quantification of disease freedom.  The output from the model will be probability distributions that can be used to make inferences about the proportion of diseased herds, within-herd prevalence, and the probability that a country is free of disease.  The research will be involve collaboration with others in the US, Australia and Switzerland.
OBJECTIVES: 1. Develop a Bayesian approach to certify disease freedom of a country/region that incorporates uncertainty in probability estimates.  2. Compare frequentist and Bayesian approaches to certify disease freedom using common data sets and to compare sample size requirements for surveys with both approaches.
APPROACH: 1. The Bayesian approach will be implemented with the Gibbs sampler, an interactive Markov-chain Monte Carlo method.  The mathematical calculations will incorporate the prior probability that a country is free of disease, the uncertainty in sensitivity and specificity estimates and the possible clustering of positive test results at a herd level.  The output will be a probabilistic estimate of disease freedom.  2. Frequentist and Bayesian estimates will be compared with common published data sets on porcine reproductive and respiratory syndrome and Newcastle Disease.  The effect of selected prior distributions for the Bayesian approach will be evaluated.  Sample sites used in frequentist calculations for surveys will be compared with estimates that we will derive using Bayesian approaches.
PROGRESS: 2000/10 TO 2004/09  Quantitative methods to certify freedom from animal pathogens (no change from what was submitted last year (see below): Quantitative approaches are needed to allow scientifically-valid inferences about freedom of animals from important pathogens that affect animal trade locally, regionally and internationally.  Freedom in the context of these inferences includes a herd prevalence of a pathogen less than a threshold value (e.g. <0.2% of infected herds). In a related project, we have developed Bayesian models to make probabilistic inferences for multiple herds and for single herds.  The single herd model has both a binomial sampling version (relevant to a small sample of the herd e.g. 10% of animals) and a hypergeometric version (relevant to testing of the entire herd.  In the model, expert prior information about the infection status of the herd, diagnostic test accuracy (sensitivity and specificity) and within-herd prevalence are used, when such data are available.  Post-test probabilities versus pre-test probabilities of infection are presented in the novel form of a curve, summarizing the probability of infection over a range of possible prior probability values.  The primary objective of this study is to collect field data to validate the suitability of the Bayesian models under field conditions.  The model is currently being evaluated using serologic and fecal culture data for Mycobacterium paratuberculosis infection in 29 herds in the Central Valley of California.  ELISA testing of 60 adult cows in each of the selected herds has been completed.  Results were interpreted as per standard procedures at the California Animal Health and Food Safety Laboratory: <0.2 = negative, 0.2 to 0.35 = suspicious, and >0.35 = positive.  For the 29 herds, the median number of positive or suspicious animals out of the 60 cows tested was 3 (range, 0 to 15).  Five herds had no positive cows in 60 tested.  We have completed follow-up ELISA testing of all adult cows in 2 of the herds with 0/60 positive on the initial screening and found 15/332 (4.5%) and 16/1144 (1.4%) ELISA-positive/suspicious samples.  Fecal samples are currently being cultured from the 31 reactors to try and unequivocally establish whether these 2 herds are infected.
IMPACT: 2000/10 TO 2004/09.  Our initial findings indicated that screening of 60 lactation-2 or older cows with ELISA in large California dairy herds (median size, 700 cows) provides a reasonable balance between cost of testing and failing to detect low prevalences of M. paratuberculosis infection.
PUBLICATIONS: 2000/10 TO 2004/09.
1. Gardner IA., T. E. Carpenter, and M.T. Collins. 2002. Risk of introduction of Mycobacterium paratuberculosis into dairy herds: effects of prevalence and test sensitivity. Presented at the 7th International Conference on Paratuberculosis, Bilboa, Spain. June, 2002.
2. Gardner I.A., T. E. Hanson, and W.O. Johnson. 2002. Bayesian inference about infection status of cattle herds with Mycobacterium paratuberculosis. Presented at the 7th International Conference on Paratuberculosis, Bilboa, Spain. June, 2002.
PROJECT CONTACT:
     Name: Gardner, I. A.  Phone: 530-752-6992.  Fax: 530-752-0414 
     Email: iagardner@ucdavis.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 APR 2005 TERM: 31 MAY 2007 FY: 2005
INVESTIGATOR: Cullor, J. S.
PERFORMING INSTITUTION:  Population Health and Reproduction.  University of California (Vet-Med)  Davis, California 95616
SUBJECTApplications of high sample throughput PCR diagnostics for animal health, food safety and food security.
NON-TECHNICAL SUMMARY: In order to insure animal health, food safety and security, and supply needed scientific information to develop better management practices and support and enforce regulatory decisions, there is a need for a broad based detection system to rapidly detect potential vectors of animal and foodborne diseases on the dairy farm environment.  This project seeks to develop a rapid and high sample throughput detection system that can be applied to a wide variety of on-farm sample types including milk, cattle feed and water for the control of infectious agents.
OBJECTIVES: The overall goal of this project is to further develop, optimize and characterize the sensitivity, specificity and ease of performance of an automated DNA extraction method coupled with PCR technology on a variety of on-farm sample types, for the identification of infectious agents, or potential vectors of infectious diseases.  These sample types include 1.) mastitic milk, for the direct and rapid detection of various bacterial pathogens including Mycoplama bovis and streptococcus species 2.) cattle feed, for the detection of prohibited ingredients including ruminant DNA to prevent the spread of Mad Cow disease and 3.) agricultural water for the presence of potential waterborne pathogens including E. coli 0157 and Salmonella which can be shed by asymptomatic cattle.
APPROACH: 1.) To evaluate a automated DNA extraction protocol to be used on milk, cattle feed and agriculture water for its ability to abrogate the effects of inhibitory agents and rapidly process numerous samples.  2.) To further develop PCR primers and florescent probes to detect and identify various waterborne infectious agents including E. coli 0157 and Salmonella.  3.) To optimize and characterize each DNA extraction /PCR assay for sample throughput, lower limit of detection, sensitivity, specificity and ease of performance using laboratory spiked samples.
PROGRESS: 2005/01 TO 2005/12.  An automated DNA extraction system based on magnetic bead technology has been purchased, set-up, and its use, including training, offered to other research units within the School of Veterinary Medicine.  The system is capable of extracting up to 32 samples within one hour with minimal hands-on labor required.  The system has also been evaluated in a side by side comparison of a manual DNA extraction method using milk spiked with viable Mycobacterium paratuberculosis cells (MAP).  In brief bulk tank milk samples were spiked with different MAP cell/ml concentrations.  The samples were centrifuged and the DNA from the resulting pellet was extracted by both a manual DNA method, and the automated method.  The resulting DNA was then assayed with a real time MAP PCR assay with the results recorded as either positive or negative for each spiked sample in order to compare the lower limits of detection for each method.  The automated DNA extraction method was able to return essentially the same results as the best used manual DNA extraction method on the samples studied.  These results suggest that the automated DNA extraction system is as capable as the best manual method available in efficiently extracting mycobacterial DNA from milk.
IMPACT: 2005/01 TO 2005/12.  The automated DNA extraction system thus far studied may be utilized for high sample throughput milk quality applications allowing for very sensitive bacterial detection in a labor saving manner.
PUBLICATIONS: 2005/01 TO 2005/12.
No publications reported this period
PROJECT CONTACT:
     Name: Cullor, J. S.  Phone: 559-688-1731.  Fax: 559-686-4231    
     
Email: jscullor@ucdavis.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 APR 2005 TERM: 31 MAY 2010 FY: 2005
INVESTIGATOR: Gardner, I. A.; Adaska, J. M.; Whitlock, R. H.
PERFORMING INSTITUTION:  Medicine and Epidemiology.  University of California (Vet-Med)  Davis, California 95616
SUBJECT:  Ecology and detection of Mycobacterium avium subsp. paratuberculosis in dairy herds.  
NON-TECHNICAL SUMMARY: There are many deficiencies in existing knowledge about the transmission and detection of Map in cattle herds, including how to most effectively use currently-available tests for diagnosis of Map infection.  This project will assess persistence of the Map on dairy farms and methods for quantification of bioburden.
OBJECTIVES: 1. To quantify and evaluate the role of the environmental bio-burden of Mycobacterium avium subsp. paratuberculosis (Map) in the transmission of Johne's disease on dairy farms.  2. To evaluate optimal testing strategies for detection of Map in dairy herds.
APPROACH: For objective 1, numbers of Map bacteria in multiple environmental locations in dairy herds will be quantified using Herrold's egg yolk medium and the Trek ESP II system.  Cultures which yield values that are very high shedders will be quantified further by serial dilution to estimate the most probable numbers of bacteria in the samples.  For objective 2, a stochastic simulation model will be modified to evaluate various testing (including use of environmental samples) and sampling methods for detection of Map in dairy herds.
PROGRESS: 2005/01 TO 2005/12  The objectives of the study were to evaluate the effectiveness of various testing methods for detection of Map-infected herds at the initial step of herd classification, and 2) to determine the most cost-effective testing strategies for detection of Map-infected herds for various herd demographic factors.  A stochastic simulation model was used to compare the cost-effectiveness of 7 currently-available testing methods for detection of Map-infection in California dairies.  Testing methods were culture of environmental samples (ENV), culture of fecal pools containing 10 individual fecal samples per pool (PFC), culture of individual fecal samples (IFC), a qualitative fecal PCR assay, 2 commercial ELISA assays: ELISA A (IDEXX Laboratories, Inc., Westbrook, ME) and ELISA B (ParaCheck; CSL/Biocor, Omaha, NE), and a combination of an ELISA assay with follow-up fecal culture of seropositive cows (EIFC).  Based on field data relevant to California herd demographics and Map prevalence, 4 herd profiles of 700 cows and 2500 cows with within-herd prevalences of 5% and 30% were simulated.  The 7 different testing methods were applied to detect Map-infected cows in the simulated herds.  In the 700-cow herd with 5% within-herd prevalence, for the same number of samples tested, the testing method that yielded the highest herd sensitivity was ENV followed by PFC, PCR, ELISA A, IFC, ELISA B, and EIFC, respectively.  To achieve > 95% herd sensitivity, 2, 10, 55, 60, 90, 100 samples per herd were required for ENV, PFC, PCR, ELISA A, IFC, and ELISA B, respectively.  Testing of 30 samples using EIFC yielded only 13% herd sensitivity, and required > 180 samples to achieve 95% herd sensitivity.  In the 700-cow herd with 30% within-herd prevalence, ENV and PFC also yielded the highest herd sensitivity.  However, of the methods applied to individual cows, IFC yielded a higher herd sensitivity than PCR followed by ELISA A, ELISA B, and EIFC, respectively.  Testing of 30 samples using EIFC method yielded 82% herd sensitivity, but only 1 sample of ENV provided 100% herd sensitivity in this population.  The effect of herd size on the herd sensitivity was minimal.  The 7 testing methods were compared in terms of their monetary cost per unit of effectiveness (herd sensitivity).  ENV was overall the most cost-effective testing method in the herd with 5% within-herd prevalence followed by PFC, ELISA A, ELISA B, PCR, IFC, and EIFC, respectively.  The ratio of cost per unit of herd sensitivity for the PFC, ELISA A, ELISA B, PCR, and IFC were approximately 2, 4, 7, 16, and 20 times higher than that of ENV for 95% herd sensitivity level.  In high prevalence herd (30%), although ENV and PFC remained the 2 most cost-effective testing methods, ELISA A and ELISA B were indistinguishable, and IFC was more cost-effective than either EIFC or PCR.
IMPACT: 2005/01 TO 2005/12.  Environmental sampling (ENV) was the most cost-effective testing method for detection of Map-infected California dairy herds of unknown Map status.  As few 2 ENV samples of ENV yielded > 95% herd sensitivity when the within-herd prevalence was 5%.  The herd sensitivity for ENV did not decrease substantially when herd size was large.  The CSL ELISA was the preferable testing method when individual infected cows needed to be identified because of its high specificity and low cost.
PUBLICATIONS: 2005/01 TO 2005/12
No publications reported this period
PROJECT CONTACT:
     Name: Gardner, I. A.  Phone: 530-752-6992.  Fax: 530-752-0414
     Email: iagardner@ucdavis.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 27 SEP 2002 TERM: 26 SEP 2003
INVESTIGATOR: Gardner, I. A.
PERFORMING INSTITUTION:  Medicine and Epidemiology.  University of California (Vet-Med)  Davis, California 95616
SUBJECT:  Field evaluation of fecal pool cultures for detection of Mycobacterium paratuberculosis in large dairy herds.
NON-TECHNICAL SUMMARY: Johne's Disease is a chronic infectious and wasting bacterial disease of ruminants caused by Mycobacterium avium subspecies paratuberculosis (MAP) and occurs worldwide.  This project will apply new epidemiologic approaches to test evaluation and prevalence estimation for Mycobacterium paratuberculosis in dairy herds using field data.
OBJECTIVES: Pooled fecal culture for Mycobacterium paratuberculosis has potential application to national Johne's disease control programs in 3 ways: 1 - It can be used to define M. paratauberculosis herd status (infected or non-infected) as an alternative to ELISA testing and/or individual fecal culture.  2 - It can be applied as an initial screening tool to identify groups of cows warranting further testing by other methods, e.g. individual fecal culture.  3 - Individual-animal prevalence can be estimated from pooled test results provided that multiple pools are collected per herd.  An additional benefit of this project is that it will provide culture-based estimates of the proportion of M. paratuberculosis infected dairy herds and within-herd prevalence in typical well-managed large California dairies.  Such data have not been available to date.  Estimates of prevalence in California have been based on ELISA data collected as part of the NAHMS program and as part of other disease surveys.
APPROACH: 1. Determine the sensitivity of pooled fecal culture by 2 methods (TREK and traditional HEY culture) relative to individual fecal culture.  2. Estimate the prevalence of infected herds and within-herd prevalence in California by 2 methods - a) Based on pooled fecal culture results, b) Based on individual animal results (ELISA and fecal culture).  3. Determine the sensitivity and specificity of pooled fecal culture and ELISA tests using latent-class analysis.
PROGRESS: 2002/09 TO 2003/09  We evaluated the sensitivity of pooled fecal culture for detection of Mycobacterium avium subsp. paratuberculosis (Map) in large dairy herds and assessed the utility of the method for estimation of Map prevalence.  We used a cross-sectional study design that involved random sampling of 60 cows in each of 29 California dairy herds.  The herds ranged from 285 to 2233 cows and had no or minimal previous testing for Map. Blood and fecal samples were collected from each cow.  Sera were tested using a commercial ELISA test kit.  Fecal samples were individually cultured and used for making fecal pools.  Each fecal pool consisted of 10 randomly-selected individual fecal samples from cows in the same herd for a total of 6 pooled samples per herd. Herrolds egg yolk agar (HEY) and Trek-ESP para-JEM system II (ESP) were used for culture of individual and pooled fecal samples.  Sensitivity of pooled fecal culture was estimated using individual fecal culture results for samples within a pool as the definitive test (gold standard) and specificity of pooled fecal culture was considered perfect.  McNemars test was used to compare sensitivities of Map detection between HEY and ESP culture methods.  Bayesian methods were used to estimate animal-level prevalence and herd sensitivity of pooled fecal culture.  Differences between overall animal-level prevalence based on pooled data and individual test results were compared.  Sensitivity of pooled fecal culture across all herds was estimated to be 0.71 (27 positive pools / 38 pools that were Map positive) which was consistent with a prior experimental study by Wells and Whitlock.  Sensitivity increased as the number of culture-positive samples in a pool increased.  Pooled fecal culture detected 30% of rare (mean, 0.25 to 4 CFU/tube), 67% of low to moderate (mean, >4 to 70 CFU/tube), and 100% of high (mean, >70 CFU/tube) shedders.  Detection by the ESP method was not significantly different from HEY (P-value = 0.145) and the mean days-to-detection of ESP was 24 compared with 12-16 weeks by HEY.  ELISA, individual fecal culture and pooled fecal culture results for the 29 herds are shown in Table 1.  Animal-level prevalence (based on fecal culture alone) was estimated to be 4% with a 95% probability interval of 2 to 6% based on pooled fecal culture results.  Herd-level sensitivity ranged from 90% to 100% and was dependent on prevalence in the population and the sensitivity of pooled fecal culture.  When animal-level prevalence was estimated with a combination of ELISA and fecal culture, prevalence estimates were about 2-fold higher (Table 2).  The Bayesian approach allowed for updated estimation of the performance of the ELISA, individual fecal culture and pooled fecal culture based on expert opinion and data from the current study (Table 2).
IMPACT: 2002/09 TO 2003/09.  Use of fecal pools from 10 cows was a cost-effective tool for herd screening and might provide a good estimate of the percentage of Map-infected cows in low prevalence herds.
PUBLICATIONS: 2002/09 TO 2003/09
Saraya Tavornpanich, Ian A. Gardner, Randall J. Anderson, Sang Shin, Robert H. Whitlock, Terry Fyock, John M. Adaska, Richard L. Walker, Sharon K. Hietala. 2004. Evaluation of pooled fecal culture for detection of Mycobacterium avium
subsp. paratuberculosis in large dairy herds. American Journal of Veterinary Research 2004 (in press)
PROJECT CONTACT:
     Name: Gardner, I. A.  Phone: 530-752-1363.  Fax: 530-752-0414
     Email: iagardner@ucdavis.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JAN 2003 TERM: 31 DEC 2004
INVESTIGATOR: Adaska, J. M.
PERFORMING INSTITUTION: CA Animal Health and Food Safety Laboratory System (CAHFS).  University of California (Vet-Med).  Davis, California 95616
SUBJECT:  Prevalence of Mycobacterium avium subspecies paratuberculosis in waste milk delivered to five California calf ranches.
NON-TECHNICAL SUMMARY: Johne's disease is a chronic intestinal disease of cattle that has received much attention lately due to attempts to construct a voluntary national control program.  This project examines the possibility that waste milk fed to calves on calf ranches contains Mycobacterium avium subspecies paratuberculosis (MAP) and poses a significant threat for the amplification of Johne's disease in California dairies.
OBJECTIVES: A large percentage of dairy calves in California are raised on calf ranches and the majority of those ranches feed waste milk.  This waste milk is a potential source of Mycobacterium avium subspecies paratuberculosis (MAP) and therefore may be a significant risk for the amplification of Johne's disease in the California dairy herd.
APPROACH: Evaluation of the prevalence of MAP in the waste milk as it enters the calf ranch and as it is fed will determine the level of risk of MAP.
PROGRESS: 2003/01 TO 2004/12  The main objective of the project was to determine whether or not the causal organism of Johne’s disease, Mycobacterium avium ssp. paratuberculosis (MAP), was present and viable in pre- and post-pasteurized samples of hospital milk being fed to calves on calf ranches.  We initially enrolled five calf ranches but one dropped out after the initial sampling period leaving data from four for analysis.  Three of the calf ranches each collected milk from approximately forty dairies while the fourth collected milk from 15 dairies.  All four ranches reported that they heated milk to approximately 165degreesF and had holding time of 2-3 minutes.  We were able to identify MAP by PCR in about 5% of pre-pasteurization samples and from the same percentage of post-pasteurization samples.  There was no agreement between which samples were positive pre-pasteurization and which were positive post-pasteurization.  It needs to be kept in mind that PCR identifies the presence of DNA and can be positive even in samples where no viable or infectious organisms are present.  By culture we have been able to identify viable organisms in 2.5% of the total samples with an equal number found in pre-pasteurization samples and post-pasteurization samples.  The results of this study indicate that hospital milk collected from several dairies and fed to calves on calf ranches is a potential source of infection of calves with the causal organism of Johne’s disease.  We were able to isolate MAP from post-pasteurization samples indicating that the pasteurization methods currently in use on the calf ranches in this study (165 degrees F for 2-3 minutes) may not be adequate to kill MAP in hospital milk.  Because the pasteurization equipment was not evaluated or monitored during the course of the study however it is possible that technical problems with the equipment resulting in contamination of post-pasteurization samples or inadequate temperature or time of pasteurization may have resulted in inadequate killing of MAP.  The significance and benefit to the dairy industry from this work is that a major question, whether dilution, by combining hospital milk from several dairies, would result in MAP being undetectable and presumably an insignificant source of infection in milk fed to calf ranch calves.  Further, the study answered the question of whether or not on-farm pasteurization eliminates 100% of the viable organisms in those same milk samples.  3. Conclusions: Mycobacterium avium ssp paratuberculosis was detected by PCR from approximately 5% of hospital milk fed to calves on four California calf ranches both before and after on-farm pasteurization.  In addition, viable MAP was cultured from about 2.5% of the same milk samples.  The professional calf raisers and the dairies that contract with them need to consider these findings when feeding calves and consider raising pasteurization temperatures and time or using commercial milk replacer rather than hospital milk to feed the calves.
IMPACT: 2003/01 TO 2004/12  The results of this study indicate that the causal organism of Johne’s disease, Mycobacterium avium ssp paratuberculosis, is present in a small percentage of waste milk delivered to large calf ranches and indicate that the organism is capable of surviving the pasteurization efforts used on those same calf ranches.  These results suggest that calf ranch operators need to consider improved pasteurization methods or feeding only milk replacer to calves in order to minimize the potential transmission of Johne’s disease in the calves they raise.
PUBLICATIONS: 2003/01 TO 2004/12
No publications reported this period
PROJECT CONTACT:  
     Name: Adaska, J. M.  Phone: 559-688-7543.  Fax: 559-686-4231
     Email: jmadaska@ucdavis.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JAN 2002 TERM: 31 DEC 2002 FY: 2003
INVESTIGATOR: Cullor, J. S.; Smith, W.; Kirk, J.
PERFORMING INSTITUTION:  Population Health & Reproduction.  University of California (Vet-Med).  Davis, California 95616
SUBJECT:  A modified culturing procedure using spiral plating and microscopic screening for early detection of M. paratuberculosis from bovine manure.
NON-TECHNICAL SUMMARY: The detection of M. paratuberculosis (Johne's disease) in young cattle continues to be difficult using current tests.  There is a lack of good screening assays that are fast, inexpensive and sensitive enough to regularly and frequently screen cattle.  This project seeks to improve Johne's disease screening assays by modifying the conventional media culturing method in ways to shorten the time required for results, while maintaining low costs, ease of performance and the sensitivity/specificity which is characteristic of conventional culturing methods.
OBJECTIVES: Conventional media culturing for M. paratuberculosis involves decontaminating the sample with various agents and antibiotics followed by subculturing onto solid agar slants which are incubated for many weeks to months before visible colonies appear.  This project examines the hypothesis that the culturing step can be modified by the substitution of spiral plating on Middlebrook agar and the addition of micro-colonial morphology screening to obtain primary culture results more rapidly.
APPROACH: The first objective is to assess the ability of the spiral plating micro-colony morphology screening method (SP/MCM) to return results more rapidly than the conventional culture method using 'spiked' manure samples.  Once this is confirmed the second objective is to assess the SP/MCM method on actual field samples from herds with high incidence of Johne's disease.
PROGRESS: 2002/01 TO 2002/12.  Previous results funded by other grants, suggested that a modification in the way that manure samples were plated and screened could provide a more rapid detection of Mycobacterium paratuberculosis, however these results were obtained from manure samples containing very high numbers of the organism.  In order to compare the modified culture technique to conventional culture methods, additional studies were necessary to optimize the sensitivity (lower limit of detection) of the assay.  Because M. paratuberculosis has an extremely prolonged growth rate, clinical samples are first "decontaminated" with agents that will suppress the growth of other faster growing bacteria.  However these agents can also suppress the growth of mycobacteria to varying degrees.  Several methods to decontaminate the samples prior to plating are being investigated and optimized so that the very low numbers of mycobacteria that may be present in the naturally infected animal can be detected.  Results to date suggest that a commonly used decontamination agent, HPC (hexadecylpyridinium chloride) continues to suppress the growth of mycobacteria after being plated and during incubation, thus hindering the detection of very low numbers in the sample.
IMPACT: 2002/01 TO 2002/12.  Johne's is a contagious bacterial disease of ruminants that has significant animal health, economic, and potential human health consequences.  This grant provides additional funding to investigate and optimize the sensitivity of a more rapid culture method for the detection of the M. paratuberculosis from bovine manure.
PUBLICATIONS: 2002/01 TO 2002/12
No publications reported this period
PROJECT CONTACT:
     Name: Cullor, J. S.  Phone: 559-688-1732.  Fax: 559-688-4231
     
Email: jscullor@ucdavis.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JAN 2002 TERM: 31 DEC 2002 FY: 2003
INVESTIGATOR: Gardner, I. A.; Johnson, W.
PERFORMING INSTITUTION: Medicine & Epidemology.  University of California (Vet-Med).  Davis, California 95616
SUBJECT:  Certification of California cattle herds as free of Johne's disease using Bayesian methods.
NON-TECHNICAL SUMMARY: Johne's Disease (JD) is a chronic infectious bacterial disease caused by Mycobacterium paratuberculosis.  Infections spreads between herds primarily by trade in animals and it is estimated that at least 22f herds are infected.  There is an industry need for science based research on Johne's Disease.  This study will contribute to tests that can be used by industry to set standards for the trade of cattle.
OBJECTIVES: This project will examine whether Bayesian methods can be successfully applied to analysis of Johne's Disease herd-test results thereby better accounting for uncertainty in test performance, prevalence estimates and the herd-specific pretest (prior) probability of JD.  
APPROACH: This will be accomplished by developing and expanding an existing Bayesian model for certification of Johne's disease.  This will include addressing multiple stages of disease, hypergenometric sampling and use of multiple tests.
PROGRESS: 2002/01 TO 2002/12.  We have developed a Bayesian computer model to allow improved inferences about the infection status of dairy herds with Mycobacterium paratuberaculosis, the causative agent of Johne's disease, based on herd testing.  The model links laboratory test results from a sample of cows or the entire cow herd with test accuracy data and prior information from the herd to provide updated inferences about the probability that the herd is infected and within-herd prevalence.  In the model, uncertainty in all model inputs is modeled as a probability.  The model currently is being validated with serum enzyme-linked immunosorbent assay (ELISA) and fecal culture data from 29 Central Valley dairies.  These field data indicated that more than most herds have Mycobacterium paratuberculosis infection although within-herd prevalences are typically low.  The model should be useful in the Voluntary Johne's Disease Herd Status Program and for other certification programs that are used nationally and internationally, and for decision making by dairymen with regard to Johne's disease control.  In addition, findings from the study indicate that a sample size of sixty lactation-2 or older cows with ELISA appears to provide a reasonable balance between cost of testing and failing to detect low prevalences of M. paratuberculosis infection.
IMPACT: 2002/01 TO 2002/12.  The Bayesian model will allow for improved inferences about whether herds are infected or not with M. paratuberculosis and if infected, about the within-herd prevalence.
PUBLICATIONS: 2002/01 TO 2002/12
No publications reported this period
PROJECT CONTACT:
     Name: Gardner, I. A.  Phone: 530-752-6992.  Fax: 530-752-0414 
     Email: iagardner@ucdavis.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JAN 2003 TERM: 30 DEC 2004 FY: 2004
INVESTIGATOR: Gardner, I. A.
PERFORMING INSTITUTION:  Medicine & Epidemology.  University of California (Vet-Med)  Davis, California 95616
SUBJECT:  Certification of California cattle herds as free of Johne's disease using Bayesian methods.
NON-TECHNICAL SUMMARY: The availability of rapid, low cost and accurate diagnostic tests and testing strategies is critically important to dairy producers, herd veterinarians and regulatory authorities involved in the detection and control of bovine paratuberculosis.  Existing tests are considered to have only low to moderate sensitivity in subclinically infected animals, but high to very high specificity.  This project investigates alternative approaches to develop more cost-effective ways to obtain information of similar diagnostic utility.
OBJECTIVES: This project will examine whether Bayesian methods can be successfully applied to analysis of Johne's Disease herd-test results, thereby better accounting for uncertainty in test performance, prevalence estimates and the herd-specific present probability of JD.
APPROACH: 1. Determine the sensitivity of pooled fecal culture relative to individual fecal culture.  2. Estimate the prevalence of infected dairy herds and within-herd prevalence based on pooled fecal culture results and individual animal results.
PROGRESS: 2003/01 TO 2004/12  The objectives of the study were to 1) estimate the sensitivity of pooled fecal culture(10 randomly-selected samples per pool) for detection of Mycobacterium avium subsp. paratuberculosis (Map) in large dairy herds and 2)assess the utility of the method for estimation of Map prevalence.  A cross-sectional study design that involved random sampling of 60 cows in each of 29 California dairy herds was used.  The herds ranged from 285 to 2233 cows and had no or minimal previous testing for Map.  Testing of serum was done with the IDEXX ELISA and fecal samples (individual and pooled) were tested by Herrolds egg yolk agar (HEY) and Trek-ESP para-JEM system II (ESP).  Bayesian methods were used to estimate animal-level prevalence and herd sensitivity of pooled fecal culture.  Differences between overall animal-level prevalence based on pooled data and individual test results were compared.  Sensitivity of pooled fecal culture across all herds was estimated to be 0.71 (27 positive pools of 38 pools that were Map positive).  Sensitivity increased as the number of culture-positive samples in a pool increased.  Pooled fecal culture detected 30% of rare (mean, 0.25 to 4 CFU/tube), 67% of low to moderate (mean, >4 to 70 CFU/tube), and 100% of high (mean, >70 CFU/tube) shedders.  Detection by the ESP method was not significantly different from HEY and the mean days-to-detection of ESP was 24 compared with 12-16 weeks by HEY.  Animal-level prevalence (based on fecal culture alone) was estimated to be 4% with a 95% probability interval of 2 to 6% based on pooled fecal culture results.  Herd-level sensitivity ranged from 90% to 100% and was dependent on prevalence in the population and the sensitivity of pooled fecal culture.  When animal-level prevalence was estimated with a combination of ELISA and fecal culture, prevalence estimates were about 2-fold higher, indicating that ELISA is detecting some truly infected animals not detected by culture.
IMPACT: 2003/01 TO 2004/12  Use of fecal pools from 10 cows was a cost-effective tool for herd screening and might provide a good estimate of the percentage of Map-infected cows in low prevalence herds with minimal amounts of previous testing.  Other low cost detection methods such as environmental sampling are currently being evaluated by our group in collaboration with the University of Minnesota and the Centers for Epidemiology and Animal Health.  The Bayesian approach allowed for updated estimation of the performance of the ELISA, individual fecal culture and pooled fecal culture based on expert opinion and data from the current study.  The present study further demonstrated the utility of Bayesian methods for evaluation of test accuracy and estimation of paratuberculosis prevalence.
PUBLICATIONS: 2003/01 TO 2004/12
1. Tavornpanich, S., I.A. Gardner, R.J. Anderson, S. Shin, R.H. Whitlock, T.Fyock, J.M. Adaska, R.L. Walker, and S.K. Hietala.  Evaluation of microbial culture of pooled fecal samples for detection of Mycobacterium avium subsp. paratuberculosis in large dairy herds. American Journal of Veterinary Research 2004; 65:1061-1070.
2. Crossley, B.M., F.J. Zagmutt-Vergara, T.L. Fyock. R.H. Whitlock, and I.A. Gardner.  Fecal shedding of Mycobacterium avium subsp. paratuberculosis by dairy cows.  Veterinary Microbiology 2005 (in press).
PROJECT CONTACT:
     Name: Gardner, I. A.  Phone: 530-752-6992.  Fax: 530-752-0414 
     Email: iagardner@ucdavis.edu

 

PROJ TYPE: STATE PROJ STATUS: EXTENDED
START: 01 JAN 1994 TERM: 30 JUN 2006 FY: 2005
INVESTIGATOR: Cullor, J. S.
PERFORMING INSTITUTION:  Population Health and Reproduction.  University of California (Vet-Med).  Davis, California 95616
SUBJECT:  Dairy Food Safety Laboratory.
OBJECTIVES: The Dairy Food Safety Laboratory's mandate is to provide consistent, rapid response of applied research on herd health and food safety questions as they arise.  The Laboratory has effectively served as the focus of collaborative efforts between UC faculty (Veterinary Medicine, Veterinary Extension, Animal Science), state and federal regulatory agencies, the National Mastitis Council, National Milk Producer's Federation, Cal Poly SLO, dairy producers, processing plants/cooperatives, farm advisors, and private industry.  The DFSL is gaining a high profile in private and public arenas as a genuinely outstanding effort and has received glowing compliments from a USDA site review panel in 1995.  
APPROACH: Areas of applied and basic research which the Laboratory will pursue during this funding period include: A. Expand the Dairy Food Safety Laboratory Home Page on the internet. B. Continue development of the J6 vaccine and perform vaccine safety trials on commercial products.  C. Continue discussions with FDA Center for Veterinary Medicine, NCIMS and National Mastitis Council on establishing the proper scientific protocols for validation of drug residue test kits for individual animal application, tanker truck, and bulk tank evaluation.  D. Training of students in mastitis diagnosis, residue testing procedures, and implementation of chemical and microbial residue avoidance programs.  E. Continue the laboratory service of studying mastitis outbreaks, identification of mastitis pathogens (i.e. Mycoplasma, Staphylococcus, Streptococcus, E. coli, etc.) and investigating the causes for adverse vaccine reactions in cows and calves that result in deaths or decreases in milk production.  F. Resume evaluation of current tests available for residues in milk and meat.  Primary efforts will be directed at evaluating the residue tests for the cull cow (serum, urine, blood, etc.).  Additional efforts will address milk residues at the level of the sick cow, cull cow, the bulk tank and the processing plant.
PROGRESS: 2005/01 TO 2005/12.  Objective: Rapid, High Throughput Diagnostics: Johne's Disease.  The goal of this project is to specifically address the need for better diagnostic testing using rapid PCR techniques for the detection and identification of the Johne's agent MAP or M. paratuberculosis.  The systems developed in this project are for processing very diverse samples such as milk, cattle manure and water.  In a direct comparison with culturing for MAP using the TREK culture system, PCR was able to detect MAP in more samples suggesting that this assay is potentially more sensitive than TREK culture and ELISA methods.  Objective : Non-antibiotic Mastitis Therapy The overall aim of this project is to study chelating agents as a new tool to combat the treatment of bacterial pathogens causing mastitis.  In vitro work we have done has shown significant antimicrobial activities against important bovine mastitis bacterial pathogens.  We have now made treated cows with EDTA.  Cows with mammary gland infections were given EDTA alone and in combination with antibiotics.  During the 28 day observation period, cows treated with EDTA in combination with antibiotics showed a decreases somatic cell count and less shedding of bacteria as compared to cows treated with antibiotics alone.  The ultimate outcome of these activities is to prolong the lifespan of approved drugs by promoting prudent and judicious use of antimicrobial drugs.  Objective : Nutrient Management- Environmental Health Various animal and human pathogens can be spread throughout a dairy herd by contaminated manure.  Previously we have demonstrated effective killing of important pathogens with Radio Frequency (RF) technology, Ohmic heating, and Pulsed Laser technologies.  Last year we initiated some investigations with a biodegradable chemical (EDDS) an active ingredient in some detergents.  The antimicrobial effects of this agent against pathogenic agents have been studied on different bacteria known to cause bovine mastitis.  A range of doses, times, and temperatures have been studied to quantitate reductions of pathogen populations in treated and control samples.  In general this agent is more affective against gram negative bacteria then the gram positive types.  Further results on the anti-microbial effectiveness of this agent against other bacteria including Salmonella are pending.  Objective : Johne's Pasteurization.  We have analyzed the basic problem with pasteurization of the Johne’s agent MAP (Mycobacterium paratuberculosis) and have come up with a proposal that takes into account discrepancies in the literature.  The guidelines as established in the Pasteurized Milk Ordinance do not specify that pasteurization should occur in the heaters.  The guidelines are very specific in stating that milk must be pasteurized in the holding tube after it has left the heat exchangers.  We will submit the grant to DMI, the Dairy Marketing Institute for funding that will focus on the holding tube and not the heat exchanger.
IMPACT: 2005/01 TO 2005/12.  The DFSL accomplishes its mission by performing rapid response, applied research on dairy herd health and on-farm food safety issues of concern to the public.  This program sustains and enhances the marketability of milk and dairy beef to the consumer in California and the United States.  The information gathered from these investigations will lead to technology transfer to the producer and will provide answers to challenging questions facing the industry today and in the immediate future.  Completing these objectives will enhance on-farm food safety and can be applied throughout the state
PUBLICATIONS: 2005/01 TO 2005/12
1. Kirk,JH, Glenn, KS, Cullor, JS. Environmental mastitis pathogens isolated from bulk tank milk collected on California dairies: prevalence and antibiotic susceptibility. Bovine Practitioner. 2005; 39(1): 37-42.
2. JH Kirk, B McCowan, ER Atwill, KS Glenn, GE Higginbotham, CA Collar, A Castillo, BA Reed, N G Peterson and JS Cullor. Association of minimum inhibitory concentration cluster patterns with dairy management practices for environmental bacteria isolated from bulk tank milk. J. Dairy Sci. 2005, 88:3710-3720.
3. Wu, JY, Delwiche MJ, Cullor, JS, Smith Wl. Deoxyribonucleic acid sensor for the detection of somatic cells in bovine milk. Biosystems Engineering. 2005; 90(2): 143-151
4. Cullor, JS. Applied biosecurity for dairy farms. Medecin Veterinaire du Quebec. 2004; 34(1/2): 32-33.
5. Payne MA, Wetzlich SE, Robb EJ, Brown SA, Gardner IA, Cullor JS, Craigmill AL. Comparison of the use of regulatory assays and high erformance liquid chromatography for detection of residues of ceftiofur sodium metabolites in tissue specimens of culled dairy cattle. Am J Vet Res. 2004 Dec;65(12):1730-3.
6. Deluyker HA, Rossitto P, Van Oye SN, Cullor JS. Efficacy of an Escherichia coli J-5 mutant strain bacterin in the protection of calves from endotoxin disease caused by subcutaneous challenge with endotoxins from Escherichia coli. Vaccine. 2004 Dec 16;23(5):709-17.
7. M. C. Lagunas-Solar, J. S. Cullor, N. X. Zeng, T. D. Truong, T. K. Essert, W. L. Smith and C. Pina. Disinfection of dairy and animal farm wastewater with radiofrequency power. In Press, Journal of Dairy Science 2006.

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 28 JAN 2003 TERM: 27 JAN 2005
INVESTIGATOR: Cullor, J. S.
PERFORMING INSTITUTION:  Population Health and Reproduction.  University of California (Vet-Med)  Davis, California 95616
SUBJECT:  Diagnostic testing and management schemes for the control of the Johne's agent in milk.
NON-TECHNICAL SUMMARY:  Johne's disease is a chronic infectious and wasting bacterial disease of ruminants caused by Mycobacterium avium subspecies paratuberculosis (MAP) and occurs worldwide.  The PI has undertaken preliminary work to develop a rapid and sensitive Johne's non-invasive diagnostic and a management program for eradication of Johne's disease.  This project will take the next step to incorporate the diagnostic into Dairy-BTM (Dairy Breakthrough Management - a HACCP program) and develop an interactive software program.
OBJECTIVES:  The specific aim of this project is to further develop, refine and test an improved Johne's diagnostic test on both manure and milk and then integrate the test into an existing Johne's management program that is then reduced to farm-ready interactive software.  This project is supported by the UC Star Biotechnology Program, RZ Syntopical Technologies and California Dairy Research Foundation.
APPROACH: The two fold approach is: Can spiral plating technology be used to generate a rapid sensitive and specific Johne's disease assay and 2) Can the Johne's spiral plate assay be incorporated into a management program, reduced to software, that is effective in preventing Johne's infection in non-impacted herds and eliminating Johne's disease in impacted herds?
PROGRESS: 2003/01 TO 2005/01.  A rapid culture method for the detection of Mycobacterium avium subsp. paratuberculosis (MAP) in raw milk has been developed.  The method incorporated a zwitterionic detergent that concentrates MAP bacteria (CB18) and spiral plating with microscopic colony screening.  Raw bulk tank milk from a paratuberculosis negative herd was spiked with different concentrations of MAP (10(6) to 10cfu/ml) and processed using this novel method as well as the conventional method (HEYM).  Time and limit of detection was recorded and compared between the two assays.  Both essays were repeated independently eight times.  On average, the presence of MAP in spiked milk samples could be detected between 14 and 45 days (mean=23) using the CB18/spiral plater method and between 21 and 63 days (mean=30.9) using the HEYM culture method (the time to detection between the two methods was statistically different at p<0.001).  Samples containing higher concentrations of spiked MAP were detected earlier than the samples containing lower concentrations in both methods and the limit of detection did not differ statistically.  A real time PCR assay using CB18 was also developed and evaluated.  Bulk tank milk was spiked with 10(4) to 1cfu of MAP per ml. Different DNA extraction methods, milk volumes (5 versus 12.5ml) and PCR probes were tested and compared.  The best assay method was able to detect 100% of the samples spiked with 100cfu/ml (9 out of 9), 55% of the samples spiked with 10cfu/ml (5 out of 9) and 20% of the samples spiked to 1cfu/ml (1 out of 5).  Both the real time PCR and milk culture methods using CB18 are currently being tested on samples from dairy farms.  The DFSL is collaborating with other UC Davis investigators who have been providing pre and post pasteurized waste milk from calf ranches in the Central Valley, as well as bulk tank milk samples from dairies.
IMPACT: 2003/01 TO 2005/01.  Johne's is a contagious bacterial disease of ruminants that has significant animal health, economic, and potential human health consequences.  The results thus far are providing the preliminary data for designing field testing experiments to determine sensitivity and specificity of the assay so that positive and negative predicted value versus disease prevalence can be determined.  This data will eventually be used in the development of on-farm management protocols to control the spread of Johne's disease.
PUBLICATIONS: 2003/01 TO 2005/01
No publications reported this period
PROJECT CONTACT:
     Name: Cullor, J. S.  Phone: 559-688-1731.  Fax: 559-688-4231
     Email
: jscullor@ucdavis.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 MAR 1999 TERM: 30 JUN 2004 FY: 2004
INVESTIGATOR: Sommers, L. E.; Auld, G. W.; Burns, P. D.; Byrne, P. F.; Garry, F. B.; Kelly, E. F.
PERFORMING INSTITUTION:  Administration.  Colorado State University.  Fort Collins, Colorado 80523
SUBJECT:  Interdisciplinary research in animal, plant and environmental science.
NON-TECHNICAL SUMMARY: Interdisciplinary teams are needed to solve complex problems in agricultural production systems.  This project examines Johne's disease, use of GIS for precision agriculture, reproduction in beef cows, and stress tolerance in wheat.
OBJECTIVES: Research will be conducted by interdisciplinary teams of scientists in the following areas: 1) investigate the development of new foodlinks between local producers and organizations serving food; 2) evaluate regulation of prostaglandin synthesis and efficacy of feeding fish meal in ruminants; 3) identify physiological mechanisms and selection criteria for stress tolerance in wheat; 4) investigate the epidemiology, molecular genetics, and immunology of Johne's disease; and 5) develop techniques for improved use of spatial statistics and remote sensing in precision farming. APPROACH: Laboratory and field experiments will be conducted by 5 teams of researchers to accomplish the stated objectives.
PROGRESS: 1999/03 TO 2004/06.  I. Creating local food links - This sub-project was designed to promote local, sustainable food links; develop an educational model to promote these food links; and test an interpersonal approach to encourage new links between local food producers and organizational buyers.  Over 250 phone interviews were conducted with food buyers and producers to identify barriers and motivators associated with direct marketing of local foods.  An educational video and pamphlets were produced. Meetings were organized between farmers and food buyers.  II. Regulation of Prostaglandin Synthesis in Domestic Farm Animals - The sub-project improved understanding of how oxytocin regulates endometrial secretions of prostaglandin and investigated whether feeding fish meal to beef cows during the first 21 days of breeding season increased conception rates.  Experiments conducted showed that fishmeal supplementation increased fertility by 15% in postpartum first-calf beef cows.  It was hypothesized that the omega-3 fatty acids found in fishmeal become incorporated in uterine endometrium and attenuate PGF2a synthesis during maternal recognition of pregnancy and result in enhanced fertility.  Several experiments to determine the molecular and cellular mechanisms that regulate uterine PGF2a synthesis were conducted.  III. Improved heat and drought tolerance of Colorado wheat - This sub-project analyzed long-term weather data for eastern Colorado to estimate the frequency and severity of heat and drought stress in relation to wheat developmental stage.  Twelve common Colorado wheat cultivars were compared under irrigated and dryland conditions for 2 years and were evaluated for biochemical/physiological characters associated with stress tolerance.  Genes were located for Russian Wheat aphid resistance and for yield components under stressed and nonstressed conditions in a recombinant inbred line population.  IV. Interdisciplinary program in Johne's disease research - The objectives were to study the epidemiology, molecular genetics, and immunology of paratuberculosis.  Seroprevalence studies of Johne's disease were conducted repeatedly on more than 10,000 cows at 16 dairies, and data were compared with other features of the herds.  DNA was sequenced and genetic probes were developed.  A survey was administered to Crohn’s's disease patients and to control groups to examine the potential relationship between the agent of Johne's disease and the occurrence of Crohn’s's disease in humans.  V. Building soil landscape models for soil inventories and precision farming - This subproject developed and refined the program of spatial statistics, functions and GIS techniques used towards extracting detailed geographic information from the landscape; developed protocols for the utilization of remote sensing data and progressive soil surveys; and assessed and evaluated satellite data for each set of protocols.  Landsat TM imagery was utilized to construct a base map for Costilla county and individual maps of Landsat spectral bands.  Vegetation and 3-D terrain maps were developed.  Maps, software, and other materials were customized to meet the needs of field scientists.
IMPACT: 1999/03 TO 2004/06.  Creating local food links - The research suggests that there are opportunities for direct links between producers and restaurant buyers, but success will likely require co-ops of farmers. Regulation of Prostaglandin Synthesis in Domestic Farm Animals - Results of this project indicate that extracellular signal regulatory kinase (ERK) plays a critical role in regulation of uterine PGF2a synthesis.  Improved heat and drought tolerance of Colorado wheat - It was found that a chromosome arm translocation from rye contributes to heat tolerance in wheat. It was found that April rainfall is the most important weather variable for predicting wheat yield in Colorado.
PUBLICATIONS: 1999/03 TO 2004/06
No publications reported this period
PROJECT CONTACT:
     Name: Sommers, L. E.  Phone: 970-491-5371.  Fax: 970-491-7396

     Email: lsommers@lamar.colostate.edu

    

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: EXTENDED
CONTRACT/GRANT/AGREEMENT NO: 2003-35204-13685 PROPOSAL NO: 2003-02501
START: 15 SEP 2003 TERM: 14 SEP 2006 FY: 2005 GRANT YR: 2003 GRANT AMT: $200,000
INVESTIGATOR: Belisle, J. T.; Orme, I. M.
PERFORMING INSTITUTION:  Microbiology.  Colorado State University.  Fort Collins, Colorado 80523
SUBJECT:  Proteomic definition of T cell antigens of Johne's disease.
NON-TECHNICAL SUMMARY: Johne's disease has a major economic impact on the cattle and dairy industry.  The inability to control this disease is due to the lack of an effective early diagnosis or effective vaccine.  This project will use modern biochemical and immunological approaches to identify the immunodomnant T cell antigens produced by the bacterial agent that causes Johne's disease, Mycobacterium paratuberculosis.  These antigens will represent potential vaccine and early diagnostic targets.
OBJECTIVES: The objective of this project are to identify the immunodominant T cell antigens associated with the early stages of M. paratuberculosis infections in cattle.  The specific sub-objectives are: 1) Use proteomic methodologies to identify the immunodominant T cell antigens of M. paratuberculosis.  2) Amplify, clone, and express the genes encoding the proteins identified via the proteomic identification of T cell antigens.  3) Use the recombinant products to confirm that the proteins identified through our proteomic approach truly elicit an antigen specific T cell response in M. paratuberculosis infected cattle.
APPROACH: The identification of T cell antigens will be acheived by 2D-liquid phase electrophoresis (LPE) separation of M. paratuberculosis subcellular fractions, followed by testing of the 2D-LPE fractions aginst whole blood of cattle uninfected and infected with M. paratuberculosis.  The read out for immune T cell activation will be IFN-gamma production.  The proteins of the fractions that stimulate the most dominant IFN-gamma response will be identified by electrospray mass spectrometry.  The genes encoding the proteins defined as immunodominant in the above assays will be cloned into an E. coli or M. smegmatis expression vector and the recombinant proteins produced as His-tagged fusion products.  These recombinant proteins will subsequently be used to confirm T cell antigenicity using the whole blood IFN-gamma assay.
PROGRESS: 2003/01 TO 2003/12.  Funding for this project started in Sept. 2003.  A Research Associate (50% effort) was hired and started work on January 5, 2004.  Since the start of this project we have continued to generate large scale cultures of M. avium subsp. paratuberculosis strains 517 and K-10.  The generation of a large number of protein fractions for T cell assays will begin in March 2004.  Additionally, the calves for experimental infections are expected to be purchased in April of 2004.  In addition to these ongoing activities we have acquired the latest version of the M. paratuberculosis genome sequence from Dr. Bannentine (USDA, NADL) and have performed or own in silico comparative analysis of this genome against that of M. avium subsp. avium to identify paratuberculosis specific gene fragments.  This was done using a program called PipMaker developed by PennState University Center for Comparative Genomics and Bioinformatics.  This program determines nucleotide alignments for sequences based on the assumption that the sequences are related and share blocks of high conservation.  The smallest M. paratuberculosis specific section identified was 300 bp in length and the longest 16 Kbp.  Based on our current results it appears that approximately 2% of the M. paratuberculosis genome sequence is specific to this organism in comparison to M. avium.  Further we have also performed subtractive hybridization of the M. paratuberculosis genome sequence against that of M. avium.  This has led to the identification of 13 genomic regions containing 111 putative open reading frames that are specific for M. paratuberculosis.  This genomic evaluation was not part of our original proposal.  However, with the availability of these two genomes and the tools to evaluate them, it seemed prudent for us to carry out these analyses so that M. paratuberculosis specific proteins can be identified.  These proteins will be obtained as recombinant products and used along with the native proteins of M. paratuberculosis in our evaluation of the T cell immune response.  Although we are excited about the comparative genomics data, we are also viewing these results with caution since the quality of the M. paratuberculosis genome sequence is unknown.  It was expected that the fully annotated genome of M. paratuberculosis would have been released to the general scientific community by now.  However, for reasons unknown to us this has not occurred.  In addition to the proposed evaluation of T cell responses in experimentally infected calves we have also expanded this program to include evaluations of the humoral response of naturally infected cattle.  This type of analysis is being included since some of the most dominant T cell antigens of M. tuberculosis that are now being developed as vaccines and diagnostics were originally identified through their reactivity with the human humoral response.
IMPACT: 2003/01 TO 2003/12.  Paratuberculosis continues to be a major problem to the dairy industry.  The identification of M. paratuberculosis specific antigens will greatly aid in the development of robust diagnostics.  Further, such antigens will allow a more critical evaluation of the immune response without interference from immunity to closely related mycobacteria. The studies underway will also benefit the understanding of the general physiology of M. paratuberculosis.
PUBLICATIONS: 2003/01 TO 2003/12
2003 None
PROJECT CONTACT:
     Name: Belisle, J. T.  Phone: 970-491-6549.  Fax: 970-491-1815
     E
mail: jbelisle@colostate.edu
     

 

PROJ TYPE: SPECIAL GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 2003-34405-13795 PROPOSAL NO: 2003-06088
START: 15 AUG 2003 TERM: 14 AUG 2004 FY: 2004 GRANT YR: 2003 GRANT AMT: $696,539
INVESTIGATOR: Salman, M.
PERFORMING INSTITUTION:  Environmental Health Research.  Colorado State University.  Fort Collins, Colorado 80523
SUBJECT:  Enhancement of the program for economically important infectious animal diseases.
NON-TECHNICAL SUMMARY: A multidisciplinary research center is needed to study animal diseases of economic importance.  Integration of studies covering broad spectrum of disciplines is needed to prevent duplication of existing efforts and programs.  A comprehensive study approach is expected to lead to improved disease surveillance, risk assessment, management, and control/prevention strategies.  Furthermore, these studies will lead to the generation of fundamental knowledge concerning disease transmission, diagnosis, pathogenesis, and virulence of economically important animal diseases.
OBJECTIVES: A multidisciplinary research center at CSU will be established to study animal diseases of economic importance.  The Center will work collaboratively with universities, and state and federal agencies in order to produce results covering a broad spectrum of disciplines without duplication of existing efforts and programs.  Expected results are: 1)The development of improved surveillance, risk assessment, management, and control/prevention strategies; 2)Generation of fundamental knowledge concerning transmission, diagnosis, pathogenesis, and virulence of economically important infectious animal diseases.
APPROACH:  The Center will include three major sections which will be simultaneously integrated into the research approach: biology of infectious diseases, epidemiology of animal diseases, and risk analysis/assessment.  An advisory group will be composed of scientists from all involved disciplines, commodity representatives, state departments of agriculture, and consumer advocates.
PROGRESS: 2003/08 TO 2004/08.  TSEs 6 commercial screening assays were evaluated for deer/elk. A project was initiated which could result in diagnostic tests and prevention methods for prionic infections.  Personnel were trained on the western blot test for the presence of CNS tissue in food products.  PEIIAD hosted a conference TSE in Animal Populations: Facts & Fiction to address research and policy issues.  Participation in international organizations in risk assessment and classification of countries for BSE status: Dr. Salman was re-appointed to the scientific working group of the GBR. West Nile Virus (WNV) Epidemiology:  A survey with the goal of determining the long-term outcome of WNV-affected horses was initiated.  A study has been initiated to compare antibody titers of WNV in vaccinated horses to those recovering from natural infection.  APHI personnel also investigated the possibility of development of an ELISA test for detection of IgG to WNV.  Vesicular Stomatitis (VS) Participation in the field validation of the newly developed real-time PCR for VSV detection Test development: A one-step single tube multiplex reverse-transcriptase PCR test for detection of the VSV in biological samples and insects was developed and validated. Molecular epidemiology: Molecular fingerprinting is being used in conjunction with GIS analysis to understand the spread of the VSV. Serological data: The team has demonstrated serological evidence of VSV during non-outbreak years.  Equine Infectious Diseases Equine clostridiosis Toxoid development: Development of a toxoid against equine clostridiosis for use in broodmares prior to foaling has been investigated.  Test development and validation: A test to identify clostridial beta 1 and beta 2 toxins in clinical samples was developed and is now being validated. Treatment:  The use of metranidazone and the subsequent development of resistance were investigated.  Mycobacterial work M bovis and M tuberculosis Serological testing PCR development and testing Non-domestic species Molecular epidemiology M avium ssp paratuberculosis (Johne’s disease)  Diagnostic strategies PCR development and testing Assessment of the presence of M avium ssp paratb in selected lymph nodes & other tissues Food Safety and Risk Analysis E. coli O157 testing Fecal sampling protocols Analytical methods Modeling prevalence in clusters Modeling low prevalence Modeling test dependence Modeling transmission Global Vet Epidemiology Researchers have continued to collaborate with several animal health researchers and regulators in the design & implementation of projects related to surveillance and risk analysis.  Other Topics Researchers have secured funding to gather corresponding antimicrobial resistance data from intensive livestock raising units in South America to compare to data from the USA New RB51 brucellosis vaccine are being developed and tested for use in bison and wild ungulates.  A nationally-recognized biosecurity program for livestock operations, including teaching hospitals, was developed and initiated.  PEIIAD personnel provide teaching expertise for the delivery of epidemiology training to USDA VMOs.  A new initiative involves the creation of on-line course.
IMPACT: 2003/08 TO 2004/08.  The PEIIAD will continue to support detection and prevention of animal diseases that have impact on movement and trade of animals and animal products.
PUBLICATIONS: 2003/08 TO 2004/08
1. Paul S. Morley, Josie L. Traub-Dargatz, et. al. Availability of antimicrobial drugs for use in animals without a prescription. College of Veterinary Medicine and Biomedical Sciences, Colorado State University: Fort Collins, Colorado. Poster presentation, Phi Zeta, Research Day, 2004.
2. Young S, Dunowska M, Hyatt DR, Morley PS. Evaluation of the environmental cleanliness in a veterinary teaching hospital. Poster presented at the Workshop on Nosocomial Infections and Biosecurity for Equine Hospitals. Dorothy Russell Havemeyer Foundation, Lexington, KY, 2003.
3. Serena Young, Magda Dunowska, Doreene R. Hyatt, Paul S. Morley. Evaluation of the environmental cleanliness in a veterinary teaching hospital. College of Veterinary Medicine and Biomedical Sciences, Colorado State University: Fort Collins, Colorado. Poster presentation, Phi Zeta Research Day, 2004.
4. Antimicrobial use and resistance in enteric bacteria. Invited presentation presented at the 2003 FDA/CSFSAN-CVM Research Meeting. Baltimore, MD, 2003.
5. Morley PS, Hyatt DR, Dunoswka M. The effect of virkon fogging on survival of Salmonella enterica on surfaces in a veterinary teaching hospital. Presentation at the CSU, Phi Zeta Research Day, January 2004.
6. Evaluation of the efficacy of disinfectant footbaths. Nanea Morris, Paul S. Morley, Doreene R. Hyatt. College of Veterinary Medicine and Biomedical Sciences, Colorado State University: Fort Collins, Colorado. Poster Presentation, Phi Zeta Research Day, 2003.
7. Antognoli, M.C., Hirst H.L, Goodell G., and Salman M.D. Evaluation of cell mediated immunity-based tests for detection of paratuberculosis in young cattle. Tenth International Symposium of Veterinary Epidemiology and Economics. Abstract #325. Vina del Mar, Chile, November 17-21, 2003
8. Antognoli, M.C., Hirst H.L, Goodell G, and Salman M.D. Evaluation of three methods for direct diagnosis of paratuberculosis in dairy cattle. Tenth International Symposium of Veterinary Epidemiology and Economics. Abstract #326. Vina del Mar, Chile, November 17-21, 2003
9. Morley PS. Infectious disease monitoring and surveillance at the James L. Voss Veterinary Teaching Hospital. Invited presentation at the Workshop on Nosocomial Infections and Biosecurity for Equine Hospitals. Dorothy Russell Havemeyer Foundation, Lexington, KY, 2003.
10. Dunowska M, Morley PS. Surveillance for Salmonella shedding in large animal patients. Poster presented at the Workshop on Nosocomial Infections and Biosecurity for Equine Hospitals. Dorothy Russell Havemeyer Foundation, Lexington, KY, 2003.
11. Surveillance for Salmonella shedding in large animal patients. Magda Dunowska and Paul S. Morley, College of Veterinary Medicine and Biomedical Sciences, Colorado State University: Fort Collins, Colorado. Poster presentation, Phi Zeta Research Day, 2003.
12. Burgess BA, Morley PS, Hyatt DR. 2004. Environmental surveillance for Salmonella in a veterinary teaching hospital. J Am Vet Med Assoc [Submitted].
13. Burgess BA, Morley PS, Hyatt DR. Environmental surveillance for Salmonella in a veterinary teaching hospital. Poster presented at the Workshop on Nosocomial Infections and Biosecurity for Equine Hospitals. Dorothy Russell Havemeyer Foundation, Lexington, KY, 2003.
14. Burgess BA, Morley PS, Hyatt DR. Salmonella surveillance in a large veterinary teaching hospital. Poster presented at the 4th Annual Phi Zeta Research Day, CSU College of Veterinary Medicine and Biomedical Science, Fort Collins, CO, 2003.
15. Salazer P, Traub-Dargatz JL, Morley PS, et al. Characterization of the 2002 West Nile Virus epidemic in Nebraska and Colorado equids. J Am Vet Med Assoc [In Press].
16. Geiser S, Seitzinger A, Salazar P, et al. Economic impact of West Nile Virus on the Colorado and Nebraska equine industries: 2002. [Government Report]. USDA:APHIS:VS, Centers for Epidemilogy and Animal Health. Fort Collins, CO, 2003. [available http://www.aphis.usda.gov/vs/ceah/cahm/Equine/wnv-info-sheet.pdf] #N394.0403. 4 pp.
17. Traub-Dargatz JL, Salazer P, Morley PS, et al. Vaccination status and outcome of cases of equine west nile virus cases in Colorado and Nebraska in 2002.  Proceedings of the 3rd International Veterinary Vaccines and Diagnostics Conference, Guelph, Ontario, 2003, p 68.
18. Salazer P, Traub-Dargatz JL, Morley PS, et al. Characterization of the 2002 West Nile Virus epidemic in Nebraska and Colorado equids. Scientific Proceedings of the 4th Annual Phi Zeta Research Day of the Theta Chapter, CSU College of Veterinary Medicine and Biomedical Science, Fort Collins, CO, 2003, p 34.
19. Traub-Dargatz JL, Morley PS, Salazer P, et al. Characterization of the 2002 West Nile Virus epidemic in Nebraska and Colorado equids. Presented at the 10th International Society for Veterinary Epidemiology and Economics Symposium, Vina del Mar, Chile, 2003.
20. Geiser S, Seitzinger A, Salazar P, Traub-Dargatz J, Morley P, Salman M, Wilmot D, Steffen D, Cunningham W. Economic impact of West Nile Virus on the Colorado and Nebraska equine industries: 2002. Presented at the 10th International Society for Veterinary Epidemiology and Economics Symposium, Vina del Mar, Chile, 2003.
21. International Society for Veterinary Epidemiology and Economics Abstract and Oral Presentation by Dr. Elizabeth Mumford, November 2003 and Abstract and Oral Presentation at Phi Zeta Research Day January 2003.
22. Hoover, EA. 2003 Chronic Wasting Disease. Rocky Mountain Virology Conference. November.
23. Mathiason, CK, Sigurdson, CJ, Foos, T, Eliason, G, and Hoover, EA. 2003. Expression of cervid PrPc in tissues of deer. Keystone Conference TSEs. Beaver Creek, CO, April.
24. Sigurdson, CJ, Mathiason, CK, Perrott, MR, Eliason, GA, and Hoover, EA: 2003 Transmission of Chronic Wasting Disease in the ferret. I.
PROJECT CONTACT:
     Name: Turney, L.  Phone: 970-491-6229
     E
mail: lturney@cvmbs.colostate.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: TERMINATED
START: 01 OCT 1998 TERM: 30 SEP 2004 FY: 2004
INVESTIGATOR: Niswender, G.
PERFORMING INSTITUTION:  College Administration.  Colorado State University.  Fort Collins, Colorado 80523
SUBJECT:  Bacterial diseases and the immune system.
OBJECTIVES: 1) To continue development of new procedures for the rapid and reliable detection of the causative agents of bacterial diseases; 2) To develop new, more efficacious methods for the prevention of diseases caused by bacterial agents and 3) to study the pathogenic processes and epidemiology of bacterial diseases.
APPROACH: Improved diagnostic procedures will be developed for the detection of several important pathogenic bacterial (for example, Brucella ovis; Mycobacterium ovis; Mycobacterium paratuberculosis and Clostridium perfringens).  Tests will include improved enzyme immunoassays, polymerase chain reaction to detect bacterial DNA and/or RNA, and use of fluorescently labeled recombinant DNA probes and antibodies to specific coat proteins.  These reagents will be used to study the disease process and the epidemiology of individual infections.  Finally, in some cases more effacacious recombinant vaccines will be developed to prevent the disease.
PROGRESS: 1998/10 TO 2004/09.  Mice of the CBA inbred strain background expressing the well characterized mutation designated xid in the cytoplasmic signalling enzyme Bruton's protein kinase have been previously noted to illustrate shifts in T helper type 1 (Th1)/Th2 immunity which is underlined by an apparent failure to produce the regulatory cytokine interleukin-10.  This study examined if this extended to infection with Mycobacterium tuberculosis, which also depends on Th1 immunity.  Contrary to expectations, xid mice showed evidence of a transient early susceptibility to pulmonary infection, changes in macrophage morphology, and decreased activation of lung natural killer cells, while showing evidence of substantial IL-10 production and accumulation in lung lesions macrophages, but paradoxically this did not influence the course of the chronic disease.  In addition, macrophages from the lungs of xid mice also expressed high levels of CD14.  These observations suggest that the xid mutation in cellular signalling has much wider effects on the immune system than previously thought.  In a separate study, major histocompatibility complex class I tetramer reagent was used to track antigen-specific CD8 T cells in the lungs of mice immunized with the tuberculosis vaccine candidate Mtb72F.  The results show that CD8 T cells recognizing an immunodominant Mtb32-specific epitope could be detected in significant numbers over the course of infection in mice exposed to low-dose aerosol challenge with Mycobacterium tuberculosis and that prior vaccination substantially increased the numbers of these cells early in the lungs.  The effector phenotype of the cells was shown by the demonstration that many secreted gamma interferon, but very few contained granzyme B.  As the course of the infection progressed, many activated CD8 T cells down-regulated expression of CD45RB and upregulated expression of the interleukin-7 receptor alpha chain, indicating a transition of these cells to a state of memory.  These data support the hypothesis that M. tuberculosis-specific CD8 T cells can be targeted by vaccination with the Mtb72F polyprotein.
IMPACT: 1998/10 TO 2004/09.  Mycobacterial infection in dairy cattle remains a significant economic loss to producers.  How the immune system responds to these infections is poorly understood.  This limitation has severely hampered the development of a vaccine effective for eliminating mycobaterial infections (Johne's Disease) in dairy cattle.  Some of these studies show that specific bacterial proteins can be used to specifically target components of the immune system, a mechanism that may lead to an effective vaccine for prevention of the multi-billion loss to the dairy industry caused by Johne's disease.
PUBLICATIONS: 1998/10 TO 2004/09
1. Junqueira-Kipnis AP, Kipnis A, Henao Tamayo M, Harton M, Gonzalez Juarrero M, Basaraba RJ, Orme IM. 2005.  Interleukin-10 production by lung macrophages in CBA xid mutant mice infected with Mycobacterium tuberculosis. Immunology. 115:246-52.
2. Irwin SM, Izzo AA, Dow SW, Skeiky YA, Reed SG, Alderson MR, Orme IM. 2005. Tracking antigen-specific CD8 T lymphocytes in the lungs of mice vaccinated with the Mtb72F polyprotein. Infect Immun. 73:5809-16.
3. Perry JA, Olver CS, Burnett RC, Avery AC. 2005. Cutting edge: the acquisition of TLR tolerance during malaria infection impacts T cell activation. J Immunol. 174:5921-5.

 

PROJ TYPE: HATCH PROJ STATUS: TERMINATED
START: 18 FEB 2000 TERM: 30 SEP 2005 FY: 2005
INVESTIGATOR: Elzo, M. A.; Johnson, D. D.; Kunkle, W. E.
PERFORMING INSTITUTION:  Animal Sciences.  University of Florida, Gainsville, Florida 32610
SUBJECT:  Improvement of beef cattle in multibreed populations: phase III.
NON-TECHNICAL SUMMARY: Prediction of genetic values of purebred and crossbred animals in multibreed populations.  Estimation of genetic variation and combining ability of animals in multibreed populations.  Devise new and more precise genetic-statistical models to predict the genetic values of animals and their combining ability in populations of animals composed of purebred and crossbred animals.
OBJECTIVES: Development of models and procedures to improve the predictive ability and the accuracy of genetic evaluation, selection and mating strategies of straightbred and crossbred animals in national and international multibreed populations for individual traits and for functions of traits under various environmental conditions.
APPROACH: New genetic-statistical models and procedures will be devised, followed by the generation of computer programs to be tested and validated using simulated, experimental, and multibreed field data sets.  New computing algorithms will be used and(or) devised as needed. National and international experimental and field data sets will be used.  National and international researchers will collaborate in specific parts of this project.
PROGRESS: 2000/02 TO 2005/09.  This is the final report of Phase III of this multibreed project in beef cattle.  The most important accomplishments of Phase III were: 1) establishment of long-term research collaborations with researchers from Brazil, Chile, and Thailand, and continuation of research collaboration with researchers from Colombia, 2) establishment of a long-term research collaboration with researchers from the College of Veterinary Medicine of UF on the effects of paratuberculosis on production, reproduction, and carcass traits in multibreed beef cattle, 3) development of dedicated software for editing data, constructing connected datasets and pedigree files, and evaluating animals for additive and nonadditive genetic effects of growth and dairy traits in multibreed populations in Chile, Thailand, and the US, 4) development of multibreed genetic evaluation models, estimation of additive and nonadditive variance and covariance components, and prediction of genetic values of purebred and crossbred animals from Bos taurus x Bos taurus and Bos taurus x Bos indicus multibreed populations for dairy, growth, and carcass traits, 4) results from the Thai Holstein x Bos indicus dairy cattle population indicated that 5/8 to 3/4 Bos taurus cows would produce greater amounts of milk than animals with higher Bos taurus fractions, that nonadditive genetic variation was smaller than additive genetic variation (moderate heritabilities and low nonadditive ratios in all breed groups), and that additive, nonadditive, and total genetic predictions were highly correlated under Thai tropical conditions, 5) results from the Chilean Holstein x Bos taurus dairy cattle population showed that Holstein and 3/4 Holstein produced the largest amounts of milk, that heritabilities for milk yield were moderate regardless of the Holstein fraction of the breed group, that nonadditive variance ratios were negligible but that heterosis was similar to other crossbred dairy populations under temperate climatic conditions, 6) results from the research on nonadditive genetic effects in a Brazilian Nellore cattle subpopulation indicated that the variation due to sire x maternal grandsire interaction effects was 1/3 of the additive genetic variation for weight at 120 days and 240 days (weaning), suggesting that sire x maternal grandsire interactions will need to be tested before deciding on a national genetic evaluation model for this breed in Brazil, 7) results from the UF Angus-Brahman multibreed herd showed that sire direct genetic prediction for growth traits tended to increase, but maternal ones tended to decrease from Angus to Brahman, that sire direct genetic predictions for hot carcass weight, yield grade, and shear force tended to increase, and marbling and tenderness tended to decrease from Angus to Brahman, and that there was no trend from Angus to Brahman for sire nonadditive genetic predictions, and 8) the paratuberculosis study found that Brahman fraction of dam and days in lactation were positively associated, and dam weight change, birth weight of calf, and calf preweaning gain were negatively associated with ELISA scores.
IMPACT: 2000/02 TO 2005/09.  Phase III of this research had both national and international impact. It influenced the widespread adoption of multibreed genetic evaluation procedures for the evaluation animals in beef and dairy cattle populations both nationally and internationally.  Research and development collaborations with scientists from Brazil, Colombia, and Thailand yielded information useful for the implementation of genetic evaluation of animals in multibreed populations in countries with tropical and subtropical environments.  Collaboration with Brazilian researchers indicated the need to implement multibreed genetic evaluation procedures in various multibreed subpopulations.  Researchers in Thailand are currently using multibreed procedures developed during Phase III to publish national genetic evaluations.  Research with the Chilean multibreed population showed the feasibility of using multibreed procedures composed of closely related breeds.  Paratuberculosis research in beef cattle at UF found that high ELISA scores were associated with reduced cow weights, small calf weights, and low preweaning gains, possibly due to negative effects of subclinical paratuberculosis.
PUBLICATIONS: 2000/02 TO 2005/09
1. Elzo, M. A., D. O. Rae, S. E. Lanhart, J. G. Wasdin, W. P. Dixon, and J. L. Jones. 2005. Factors associated with ELISA scores for paratuberculosis in an Angus-Brahman multibreed herd of beef cattle. J. Anim. Sci. (In Press).
2. Elzo, M. A., D. O. Rae, S. Lanhart, J. Wasdin, P. Dixon, and J. Jones. 2005. Factors Associated with ELISA Sample/Positive Ratio Scores for Paratuberculosis in an Angus-Brahman Multibreed Herd of Beef Cattle. Page 123 in Proc. 38th Annu. Conf. Am. Assoc. Bov. Pract., Salt Lake City, UT.
3. Elzo, M., D. Rae, S. Lanhart, J. Wasdin, P. Dixon, and J. Jones. 2005.  Factors associated with ELISA likelihood s/p ratio scores for paratuberculosis in an Angus-Brahman multibreed herd of beef cattle. J. Anim. Sci. 83 (Suppl. 1):139 (Abstr.)
4. Elzo, M. A., and A. de los Reyes Borjas. 2004. Perspectives for multibreed genetic evaluation of cattle in Brazil. Brazilian Anim. Sci. 5:171-185. Online. Available: http://www.revistas.ufg.br/index.php/vet/article/view/342/317.  Accessed June 27, 2008.
5. Koonawootrittriron, S., M. A. Elzo, S. Tumwasorn, and T. Tongprapi. 2005. Age at first calving of dairy cattle in a multibreed population of Thailand. Proc. 44th Kasetsart University Conference, February 1-5, 2005, Bangkok. (In press)
6. Koonawootrittriron, S., M. Elzo, P. Sopanarat, S. Prasanpanich, J. Teingthum, C. Chaimongkol, T. Sainui, K. Nithichai, T. Tongprapi, and T. Ralukmun. 2005. D.P.O. Sire & Dam Summary 2004. Dairy Promotion Organization, Ministry of Agriculture and Cooperatives of Thailand, Bangkok. p 1-32.
7. Reyes, A. de los, M. A. Elzo, A. C. Sanches, R. B. Lobo, and L. A. F. Becerra. 2005. Effect of sire x maternal grandsire interactions on (co)variance estimates and genetic trends for pre-weaning growth traits in Brazilian Nellore cattle. Brazilian Anim. Sci. 6 (In Press).
8. Reyes, A. de los, M. A. Elzo, A. C. Sanches, R. B. Lobo, and L. A. F. Becerra. 2005. Inclusion of sire x maternal grandsire interaction in models for the estimation of (co)variances and the prediction of genetic values for pre-weaning growth traits in Brazilian Nellore cattle. Proc. 42nd Annu. Meet. Brazilian Soc. Zootech., Goiania, Goias, Brazil. p 1-4.
9. Reyes, A. de los, M. A. Elzo, R. Lobo, and L. Becerra. 2005. Sire x maternal grandsire interaction for pre-weaning growth traits in Brazilian Nellore cattle. J. Anim. Sci. 83 (Suppl. 1):14 (Abstr.)
PROJECT CONTACT:
     Name: Elzo, M. A.  Phone: 352-392-7564.  Fax: 352-392-7652
     E
mail: elzo@animal.ufl.edu
 

PROJ TYPE: HATCH PROJ STATUS: NEW
START: 01 OCT 2005 TERM: 30 SEP 2010
INVESTIGATOR: Elzo, M. A.; Johnson, D. D.; Rae, D. O.
PERFORMING INSTITUTION:  Animal Sciences.  University of Florida.  Gainsville, Florida 32610
SUBJECT:  Improvement of beef cattle in multibreed populations: Phase IV.
NON-TECHNICAL SUMMARY: Accurate prediction of genetic values for economically important traits of purebred and crossbred animals is essential to devise appropriate mating and selection strategies in multibreed populations.  This project seeks to develop genetic-economic models and procedures to improve mating and selection strategies in national and international multibreed populations under a variety of environmental conditions.
OBJECTIVES: Development of models and procedures to improve the ability and accuracy of genetic prediction, selection, and mating strategies of straightbred and crossbred animals in national and international multibreed populations for functions of economically important traits under various environmental conditions.  Development of applied genetic-economic indicators to assess the worth of straightbred and crossbred animals from national and international multibreed populations for functions of traits under a variety of environmental conditions.
APPROACH: New genetic-statistical models will be devised and subsequently tested and validated using simulated, experimental, and field national and international multibreed datasets of various degrees of unbalancedness.  New computing algorithms will be incorporated and (or) devised as needed.  National and international researchers will collaborate in various stages of the research.
PROJECT CONTACT:
     Name: Elzo, M. A.  Phone: 352-392-7564.  Fax: 352-392-7652
     E
mail: elzo@animal.ufl.edu
     

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: EXTENDED
START: 01 JUL 2000 TERM: 30 JUN 2006 FY: 2005
INVESTIGATOR: Rae, D. O.
PERFORMING INSTITUTION:  College of Veterinary Medicine.  University of Florida.  Gainesville, Florida 32610
SUBJECT:  Raising the calf crop in Florida beef cattle.
NON-TECHNICAL SUMMARY: Florida, despite enjoying a subtropical climate and nearly year-round grazing, has one of the lowest average calf crops in the continental U.S.; being approximately 76% which is more than 10% below the national average.  Contributing factors include the stress of a hot, humid environment and the presence of large numbers of Bos indicus derived cattle.  This project aims to identify and characterize a number of female-related factors which contribute to reproductive efficiency in beef cattle.
OBJECTIVES: Objectives: To evaluate methods of assessing reproductive performance in beef cattle in Florida, focusing on factors such as age, phenotype, nutrition, production measures and environmental stressors.  To ascertain the best combination(s) of production traits for optimal female selection and management in Florida.  To identify biostimulatory effects on female reproduction traits (such as age at puberty and postpartum return to estrus) in Florida beef cattle.  To identify and quantify the effects of infectious disease processes on Florida calf crop, commencing with the development of an epidemiological model for ureaplasmosis and trichomonosis.
APPROACH: Assessing Reproductive Performance. Examination of the relationships between pregnancy rate, calving interval, body condition score prebreeding, body condition score at pregnancy examination, change in body condition score (spring to fall) and lactational state in four beef breeds in a subtropical environment will be assessed, focusing on the primiparous cow.  Data was collected over 5 years from approximately 450 beef cows per year. Data will be analyzed.  The statistical model will include: pregnancy rate, calving interval, breed, body condition-spring and fall, change in body condition score and lactational state.  Ascertain traits optimal for female selection and management in Florida.  Heifer reproductive traits will be obtained at cooperating sites.  Data will include age, frame score, body condition score and weight at breeding, and pregnancy rate per cycle.  Additional data will include reproductive tract scores, blood progesterone values at breeding, pelvic measures, calf weight and vigor.  Bull reproductive data will include breeding soundness parameters and performance traits.  Data will be analyzed for age and weight variations.  Identify biostimulatory effects on female reproduction traits.  Biostimulation is the stimulatory effect generated by the presence of the male on the sexual status of the female.  The objective of this study is to assess the effect of biostimulation on reproductive efficiency in beef cows.  The study will be conducted prior to and during the breeding season.  Within a week of parturition, cows will be allocated to 3 groups and placed on separate pastures.  Cows in Group A (n=30) will be placed with an epidydectomized bull (teaser); cows in Group B (n=30) will be placed with another teaser bull; and, cows in Group C (n=30) will serve as controls (no bull).  The effect of biostimulation on uterine involution will be assessed by palpation of the uterus per rectum and ultrasonography.  The effect of biostimulation on resumption of ovarian activity and cyclicity will be assessed by ovarian ultrasonography, blood progesterone and estradiol concentrations.  Pregnancy will be diagnosed using blood progesterone, ultrasonography, and rectal palpation.  The effect, of biostimulation on pregnancy will be calculated.  Epidemiological Models of Infectious Disease Effects.  Infectious disease processes can have dramatic effects on the beef cattle production.  Assessment of the effects of disease, and its economic impact, requires the development of a suitable epidemiological models to describe observations in the field.  Few models are available or suitable for modeling the extensively managed beef herds in areas such as Florida.  Thus, this component of the study will attempt to develop such a model, using Tritrichomonas fetus as the infectious agent.  The finding of high prevalence of infection on a major Florida beef ranch and several herd outbreaks in the past several years has provided data and the catalyst to commence the epidemiological model of this disease.
PROGRESS: 2004/10 TO 2005/09.  Johne's disease investigation: Dam and calf genetic and environmental factors were evaluated for their association with enzyme-linked immunosorbent assay (ELISA) s/p ratio scores for paratuberculosis in a multibreed beef cattle population.  The linear mixed model analysis used 359 ELISA s/p ratio scores from 340 dams: Angus (A), Brahman (B), 3/4 A 1/4 B, 1/2 A 1/2 B, 1/4 A 3/4 B, and Brangus (5/8 A 3/8 B).  Important dam regression effects were: 1) B - A effect was positive indicating an upward trend of ELISA scores towards 100% B dams, and 2) weight change from before calving to the date of the blood sample in May indicating a negative association between weight maintenance and ELISA scores.  Relevant calf regression effects were: 1) birth weight, 2) calf gain from birth to the date of the dam blood sample, and 3) calf age on the date of the dam blood sample.  Dams with high ELISA s/p ratio scores produced smaller calves, gained less weight (or lost weight) during the preweaning season, and produced less milk, which in turn may have caused calves to have smaller preweaning gains.  The objective of our prior study was to estimate the prevalence of Mycobacterium avium subsp. paratuberculosis (MAP) infection among beef and dairy cattle in the State of Florida.  This was a retrospective seroprevalence study on serum samples from 32,011 cattle originating from 75 herds.  Selection was limited to whole herds being tested for diagnostic purposes by owners considering participation in the voluntary Johne's Control program.  Data were obtained from the Florida State Veterinary Diagnostic Laboratory and USDA APHIS statewide submission of specimens for Johne's testing from 1999 to 2001.  Specimens were evaluated using a commercial ELISA kits.  Overall prevalence in the sample population of Florida cattle was 6.5%.  Prevalence in beef and dairy cattle was found to be 7.4% and 6.3%, respectively.  Eighty-three percent of herds included in the study had one or more positive cows in the herd.  Larger herds (>100 head) had a statistically significant higher herd prevalence than herds with less than 100 head of cattle.  The true prevalence estimate was calculated to be 11.2%.  Although within herd prevalence was lower than previously reported in Florida, seroprevalence appears to be widely distributed among Florida cattle.
IMPACT: 2004/10 TO 2005/09.  Factors identified as associated with Mycobacterium ELISA s/p ratio scores could help cattle producers with culling decisions related to paratuberculosis control and eradication efforts in beef cattle.  The study found high ELISA s/p ratio scores to be associated with lower cow weights (and perhaps lower milk production); these were evidenced in lower calf birth weight and lower preweaning gains.  Based on these results, there appears to be a significant negative impact of subclinical paratuberculosis on production traits of dams and calves.  We have previously evaluated the prevalence of Johne's disease in the Florida beef and dairy cattle population.  We have assessed the level of risk for this disease in the population and potential risk factors for this disease in Florida cattle populations.  We have also continued to look for methods of improved reproductive efficiency in Florida beef cows.
PUBLICATIONS: 2004/10 TO 2005/09
1. Elzo MA, Rae DO, Lanhart S, Wasdin J, Dixon P, Jones J. Factors associated with ELISA sample/positive ratio
scores for paratuberculosis in an Angus-Brahman multi breed herd of beef cattle.
Proceedings 38th Annual Conv AABP 38:213 2005, abstract.
2. Elzo MA, Rae DO, Lanhart SE, Wasdin JG, Dixon WP, Jones JL. Factors associated with ELISA likelihood s/p ratio scores for paratuberculosis in an Angus-Brahman multibreed herd of beef cattle. J Anim Sci xx:xxx-xxx, 200x.
3. Landaeta-Hernandez AJ, Melendez P, Bartolome J, Rae DO, Archbald LF. Effect of biostimulation on the expression of estrus in postpartum Angus cows. Theriogenology xx:xxx-xxx, 200x.
PROJECT CONTACT:
     Name: Rae, D. O.  Phone: 352-392-4700.  Fax: 352-392-7551
     E
mail: owen@rams.vetmed.ufl.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 AUG 2003 TERM: 31 JUL 2004 FY: 2004
INVESTIGATOR: Corn, J. L.; Davidson, W. R.; Fischer, J. R.
PERFORMING INSTITUTION: College of Vet Medicine.  University of Georgia.  110 Riverbend Road Athens, Georgia 30602.
SUBJECT:  Mycobacterium avium subspecies paratuberculosis in free-ranging birds and mammals on livestock premises.
NON-TECHNICAL SUMMARY: Ruminant and non-ruminant wildlife may become exposed to Mptb via feeding on contaminated grain, forage in pastures, feces, or on infected prey.  The purpose of this study is to determine if wildlife associated with livestock premises are infected by Mptb. OBJECTIVES: (a) To determine if infection by Mycobacterium avium subspecies paratuberculosis occurs in free-ranging mammals and birds on infected livestock premesis; (b) To determine if the prevalence of infection by Mycobacterium avium suspecies paratuberculosis is higher in free-ranging mammals and birds on infected livestock premesis versus non-infected premesis; (c) To determine habitat and spatial associations of infected wildlife with livestock on livestock premesis. APPROACH: Intensive sampling of wildlife will be conducted in the immediate vicinity of livestock premises in the Midwest United States (Wisconsin) and the Southeast (Georgia).  In each state, specimens will be collected from three premises that contain livestock infected with Mptb, and from one negative control site.  Wildlife sampled will be representative of those species with the highest potential for exposure to contaminated materials, and /or that pose the highest risk for contamination of livestock feed or forage.  Specimens of ileum, liver, intestinal lymph node, and feces will be harvested from each mammal collected, and ileum, liver, and feces will be collected from birds.  A portion of all specimens will be chilled for culture; additional specimens of ileum and intestinal lymph nodes will be fixed in 10% buffered formalin for future histopathological evaluation if deemed necessary.  This study will identify which, if any, species of mammals and birds found at infected livestock premises in Georgia and Wisconsin are infected by Mptb, and provide data on the prevalence of infection in wildlife from infected livestock premises as well as the geographic and habitat association of infected animals with livestock.  These data will be used to develop further epidemiological studies for use in determining control measures for Mptb in livestock.
PROGRESS: 2003/08 TO 2004/07.  The detection of Map infections in a wide range of wildlife species in Wisconsin and Georgia is the first report of Map in non-ruminant wildlife in North America, and is consistent with recent survey results in Scotland(Beard et al.,1999,2001a).  In each of these studies both mammals and birds were infected, and infections were detected on numerous premises.  In Scotland, the infection prevalence was high in rabbits(up to 67%) (Greig et al., 1997, 1999), foxes (85%), stoats (46%), and crows (60%) (Beard et al.,2001a).  In our surveys, multiple isolates of Map came from raccoons, armadillos, feral cats, and European starlings, while single isolates were made from several other species.  It is evident that a wide range of wildlife can be infected by Map, but the role of wildlife in the maintenance and transmission of this disease agent to livestock or other wildlife is not yet clear.  The isolation of Map from both tissue and fecal specimens demonstrates that these were cases of true infection, not simply contamination by recently ingested material.  The lack of histological lesions in tissues from our survey leaves questions as to the pathologic capacity of Map in these wildlife species.  In Scotland, histological lesions were seen in rabbits (Greig et al., 1997, 1999), foxes, weasels, a stoat, wood mouse, and crow (Beard et al., 2001a).  The lack of histological lesions in our specimens may be related to the phase of infection in the small number of culture-positive animals examined, or indicative of a lack of pathology associated with Map-infection in these species.  Shedding of Map may result in wildlife to wildlife, wildlife to livestock, and/or livestock to wildlife transmission, and infection pressure via these routes needs additional study.  Fecal contamination of the environment on Minnesota dairy farms by Map-infected cows is extensive (Raizman et al.,2004),and given the density of cows on farms, and the volume of contaminated feces produced by infected cows, farm contamination by cows probably is high when compared to contamination produced by infected wildlife.  However, Daniels et al.(2001,2003a,2003c) found that rabbits excrete up to 4x106 colony forming units per gram of feces, and as such, postulated that livestock could become infected by ingesting forage contaminated by rabbits.  Daniels et al.(2003a) suggest that rabbits are likely to present the greatest risk to livestock due to the high prevalence of infection, high level of fecal contamination of pastures, and the lack of avoidance of rabbit feces on pastures by cattle.  Daniels et al.(2003b) developed a model that suggests that fecal contamination of stored feed by wildlife could serve as a source of Map infection for livestock in Scotland.  We did not measure environmental contamination by infected wildlife over time, but 5 of the 26 culture-positive animals sampled in our survey, or 5 of the total 674 animals sampled on Map-infected farms, were shedding when sampled.  Because specimens from birds were collected as liver and gastrointestinal tract only, it was not possible to determine if shedding occurred in birds in our survey.
IMPACT: 2003/08 TO 2004/07.  Individuals of some species of wildlife may live for several years and can have home ranges that cover areas large enough to include more than one farm.  Raccoon home ranges average 40-100 ha, and movements may be made to areas outside the home range to visit temporary food sources (Kaufmann, 1982).  Infected wildlife may shed Map over a period of time, and this could include shedding on the farm where the infection originated, as well as on nearby farms, depending on movement patterns of the individual animals.  Wildlife may not be important to the maintenance of Map on farms when infected livestock are present due to the relatively large amount of Map-contamination by livestock.  However, wildlife may be an epidemiologically significant factor for Map control on farms that have eliminated all Map-infected livestock from the premises, and on Map-free farms in the same geographic area as infected farms. Whittington et al. (2003) found that recovery of Map from environmental samples on sheep and goat farms in New Zealand was very low five months after the infected stock were removed, but infected wildlife with longer life spans may continue shedding beyond this period of time.
PUBLICATIONS: 2003/08 TO 2004/07
No publications reported this period
PROJECT CONTACT:
     Name: Corn, J. L.  Phone: 706-542-1741.  Fax: 706-542-5865
     E
mail: jcorn@vet.uga.edu

 

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 SEP 2004 TERM: 31 AUG 2005 FY: 2005
INVESTIGATOR: Hurley, D. J.; Donovan, D. C.; Reber, A. J.
PERFORMING INSTITUTION: College of Vet Medicine.  University of Georgia.  110 Riverbend Road, Athens, Georgia 30602
SUBJECT:  Comparison of fresh and frozen colostrums in transfer of mycobacterial immunity.
NON-TECHNICAL SUMMARY: Current production practice utilizes the substitution of frozen colostrum for colostrum from the mother when the mother does not make enough or the colostrum does not appear to be of good quality.  We are learning that the cells found in colostrum from the mother appear to play a role in immune development of the newborn.  A direct comparison of calves receiving fresh colostrum from their mothers with those receiving frozen colostrum to assess the effects of maternal cells on immune development is critic to making good management recommendations.  This project will compare the effect of fresh colostrum containing intact maternal cells with frozen colostrum that still contains the contents of maternal cells and frozen colostrum that had the maternal cells removed before freezing on the development of critical immune functions to the lifelong health of the calf.  The findings will allow us to make a better definition of quality colostrum and a basis to analyze its role in management programs for neonatal calves. OBJECTIVES: The goal of this project is to determine the effect of maternal colostral leukocytes on the maturation and function of antigen presenting cells in the development of specific adaptive immunity after feeding colostrum.  Maternal cells could play two specific roles in transfer of maternal adaptive immunity; to participate in cellular interactions between antigen and leukocytes and initiate adaptive responses, or to provide soluble factors analogous to transfer factor in priming adaptive specific immunity.  The use of frozen colostrum would ablate the first function, but may allow or even facilitate the second.  Our hypothesis is that freezing colostrum will reduce the efficacy of colostrum by destroying colostral leukocytes, which are be needed to stimulate the neonatal adaptive immune responses.  The project has two objectives: 1) To determine the phenotype of neonatal mononuclear leukocytes after ingestion of fresh or frozen colostrum, and 2) To determine the function of calf cells after ingestion of fresh or frozen colostrum.
APPROACH: An electro-mechanical device will be used to monitor the onset of labor in 15 dairy cattle for this experiment.  This device will telephone one of the investigators to assure that the birth is monitored.  The calves we be removed from the cows as they hit the ground to assure initial colostrum ingestion is according to the design.  Colostrum will be collected from each mother.  The calves will be assorted among three groups in random order.  The first group will receive 4-5 liters whole maternal colostrum from the investigator between 4-6 hours after birth.  The second group will receive colostrum that has been frozen to destroy maternal cells, but release their contents (to provide transfer factor-like conditions).  Each calf will receive 4-5 liters of frozen colostrum from the investigator between 4-6 hours after birth.  The final group will receive colostrum that has been centrifuged to remove maternal cells and frozen to destroy any remaining cells.  Again, each calf will receive 4-5 liters of cell-free frozen colostrum from the investigator between 4-6 hours after birth.  To monitor the changes induced by colostrum in the immune response, blood samples from each calf will be drawn at birth and 1,7, 14, 21 and 28 days after birth.  The phenotype of the mononuclear cells will be assessed using commercial monoclonal antibodies and flow cytometry.  In addition, the capacity of mononuclear cells to respond in mixed leukocyte cultures, and to Staph. enterotoxin B, Johnin PPD and M. bovis PPD in vitro will be assessed by monitoring proliferation.  The function of monocyte lineage cells will be further monitored by assessing LPS induced nitric oxide production.  Calves from the three groups will be compared using 2 way ANOVA analysis to determine the differences in rate of appearance of cells with the phenotype of antigen presenting cells and in development of functional adaptive responses to alloantigens, superantigen and mycobacterial antigens.
PROGRESS: 2004/01 TO 2004/12.  Johne's disease is a major economic problem in raising cattle.  Herd prevalence estimates indicate that 25% to 35% of dairy herds are infected in dairy production area of the US.  Mycobacterium avium subsp paratuberculosis (Map) is the etiological agent of Johne's disease.  This infection is normally acquired by neonates.  Ingestion of colostrum and milk contaminated with fecal material represents the major route of infection for newborns.  Pasteurization of colostrum is promoted as a way to reduce the transmission of Map.  Pasteurization may cause a destruction of immune components in the colostrum, which could reduced the efficacy of passive transfer of immunity.  Living maternal cells and/or the products of their lysis in colostrum appear to play an important role in the transfer of immunity from cow to calf, and may be important in transfer of specific mycobacterial immunity to the neonatal calf.  Maternal cells also appear to be important in the development of adaptive immune response by neonatal calves.  It is common practice to pool colostrum from cows with high levels of antibody and store it frozen for feeding to calves.  This practice may reduce the quality of colostrum by destroying immune cells.  However, there is some evidence that the products of the broken down cells may transfer immunity.  The goal of this project is to determine the effect of ingestion of live maternal cells from colostrum, as compared to the cell fragments found in frozen colostrum (transfer factor) on the capacity of neonatal immune cells to responds to mycobacterial antigens after ingestion of colostrum.  As a negative control, some calves will be fed colostrum that has had the cells removed by centrifugation (acellular colostrum).  The objectives of our study are: 1) to determine the phenotype of immune cells circulating in the neonatal calf prior to and after ingestion of fresh, frozen or acellular colostrums, and 2) to determine the function of immune cells in the circulation of the neonatal calf prior to and after ingestion of fresh, frozen or acellular colostrum.  The response of immune cells from calves to purified protein derivatives (PPD) from M. bovis, M. avium and Map will be assessed prior to feeding colostrum, and on days 1, 2, 7, 14, 21 and 28 after ingestion of fresh, frozen or acellular colostrum.  We will be assessing the correlations between the expression of surface proteins know to regulate the immune response and that serve as indicators of mycobacterial response with the function of the immune cells in each group over a period of 4 week after they receive colostrum.  Fifteen neonatal calves from the University of Georgia Dairy will be used to investigate the expression of MHC class II protein, the expression of cellular activation antigens and cellular response to PPD.  To date we have collected data from two calves in each group.  Collection of the remaining data will begin in September 2005, when calving resumes.
IMPACT: 2004/01 TO 2004/12.  This study will provide evidence for the roles of intact, viable maternal cells or the lysate of maternal cells in the development of adaptive, cellular immunity to mycobacterial antigens in calves.  The data will provide the basis for a more rational definition of colostrum quality with respect to neonatal immune development under the influence of primed maternal immunity.  It may also provide a mechanism for enhancing neonatal immunity against mycobacterial infections, if the lysate of frozen cells provides transfer factor-like activity.
PUBLICATIONS: 2004/01 TO 2004/12
No publications reported this period
PROJECT CONTACT:
     Name: Hurley, D. J.  Phone: 706-542-6371.  Fax: 706-542-8833
     E
mail: dhurley@vet.uga.edu

     

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 SEP 2004 TERM: 31 AUG 2005 FY: 2005
INVESTIGATOR: Vandenplas, M. L.; Okinaga, T.; Hurley, D. J.
PERFORMING INSTITUTION:  College of Vet Medicine.  University of Georgia.  110 Riverbend Road, Athens, Georgia 30602
SUBJECT:  Correlating Map induced NF-kB activation with NOD2 mutations in Johne's disease.
NON-TECHNICAL SUMMARY: Infection with Mycobacterium avium ssp paratuberculosis (Map) and Johne's disease are a significant economic problem in rearing cattle.  It has been recognized for 30 years that resistant and sensitive individuals can be found within the population of cattle.  At present, there are no direct methods to identify resistant individuals without challenging them with the organism.  This project will utilize a readily measurable physiological response of white blood cells to infection with Map to sort cattle into two groups, and then allow us to look for differences in the genes that control that response as a starting point in a biological definition of resistant and susceptible animals.  The results of this project will provide candidate genetic markers for the development of Johne's resistant herds.
OBJECTIVES: Mycobacterium avium subspecies paratuberculosis (Map) is associated with the development of inflammatory gastrointestinal diseases in humans and cattle.  In the human manifestation of the disease, known as Crohn’s's disease, mutations in an inflammatory regulation control gene, NOD2, have been identified in >80% of individuals with disease symptoms, and are a critical factor in susceptibility to Crohn’s's disease.  The mutations impair activation of NF-kB, a pleotropic transcription factor involved in regulation of a wide variety of inflammatory mediators. Mutations in Toll-like receptor-(TLR) 2 and TLR4 genes have also been associated with increased susceptibility to bacterial infections in other species, and are potential candidates for the genes responsible for the susceptibility of some cattle to Johne's disease.  Our hypothesis is that activation of NF-kB by viable Map organisms will be significantly less in mononuclear leukocytes obtained from cattle having mutations in one or more of the inflammatory regulation genes (NOD2, TLR2 and TLR4) than in mononuclear leukocytes obtained from cattle lacking mutations in these genes.  To test this hypothesis, experiments will be conducted to pursue two goals.  The first goal is to demonstrate that cattle can be sorted into two distinct populations based on differences in translocation of NF-kB in their mononuclear leukocytes induced by Map organisms.  The second goal is to sequence mRNA for the genes that regulate inflammatory responses to bacteria, specifically NOD2, TLR4, and TLR2.  We expect that mutations in NOD2, TLR2 and/or TLR4 will segregate with a reduced ability of Map to activate NF-kB in mononuclear leukocytes.  The objectives of this project are: 1) to collect mononuclear leukocytes from 20 cattle, 10 from a herd lacking evidence of Johne's disease for at least 2 years, and 10 from the Johne's disease demonstration herds in Georgia, each of which contains many Johne's disease positive animals.  Mononuclear leukocytes in culture will be infected with a Multiplicity of Infection of 10 Map organisms per leukocyte for 12-16 hours; E. coli lipopolysaccharide, and S. aureus muramyl dipeptide will be used as positive TLR4 and TLR 2 controls, respectively.  The leukocytes will be collected and NF-kB electrophoretic mobility shift assays performed to assess the level of activation of the transcription factor in cells from each animal; 2) To clone and sequence a full-length cDNA transcript for bovine NOD2 and use the known bovine TLR2 and TLR4 sequences, to design the mRNA sequencing primers needed to establish genetic probes for evaluating NOD2, TLR2 and TLR4 genes, and 3) To sequence the mRNA for NOD2, TLR2 and TLR4 from each of the cattle evaluated in Objective 1 and then to identify single nucleotide polymorphisms that segregate with an altered ability to induce activation of NF-kB.
APPROACH: Animals from two herds will be utilized.  Blood samples will be collected from 10 cattle housed at a facility that has gone through two years of screening under the Johne's control program and has no evidence of Johne's disease on the facility.  Blood samples from 10 cattle in the Georgia Johne's demonstration herd will also be collected.  This herd has active Johne's disease; cattle not showing symptoms of Johne's disease animals will be selected as donors.  Blood will be collected and transported to the lab within 6 h of collection.  Buffy coat will be collected for each animal, and the buffy, layered over Histopaque 1083 to generate a population of mononuclear cells. PBMCs will be suspended in RPMI + 10% FCS and incubated at 37C with the bacterial products (1 hours) or Map organisms (14 hr).  At the end of the incubation time, a nuclear extract will be prepared, the released nuclear protein will be collected by centrifugation and the protein quantified.  The electrophoretic mobility shift assays for each nuclear protein extract will be incubated at room temperature for 20 minutes with 32P-labeled NF-kB oligonucleotide and the complexes resolved on polyacrylamide gels.  Each gel will also include nuclear extract from LPS-stimulated human Mono Mac 6 cells as an inter-assay control.  The gels will be dried and visualized on a phosphoimager.  Relative change in complex intensity will be determined by densitometry and expressed as a percentage of Mono Mac 6 cell nuclear extract.  The NOD2 clone will be obtained from BACPAC Resource Center.  The insert of the clone will be fully sequenced to obtain 3' half of bovine NOD2.  The 5'-end sequence of bovine NOD2 will be obtained by 5'-RACE PCR. Purified mRNA from bovine peripheral blood mononuclear cells, will serve as template in the 5'-RACE PCR reaction using an internal primer designed from the bovine NOD2 sequence.  The insert of 5 PCR-derived clones will be fully sequenced for both strands.  This will allow us to obtain full-length sequence of bovine NOD2.  Using the known bovine TLR2 and TLR4 sequence together with our bovine NOD2, PCR primers will be designed to produce overlapping PCR products that span the entire sequence of mRNA transcripts.  Primer pairs will be used in a single step RT-PCR with RNA isolated from each animal as template.  After PCR amplification, the products will be purified, size confirmed by agarose gel electrophoresis and then quantified.  The PCR product will be sequenced by high throughput sequencing methodology.  Sequences of the PCR products generated the RNA sample then will be compared to identify single nucleotide polymorphisms, and the results compared with the NF-kB phenotypic response data.
PROJECT CONTACT:
     Name: Hurley, D. J.  Phone: 706-542-6371.  Fax: 706-542-8833
     E
mail: dhurley@vet.uga.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 JUL 2004 TERM: 30 SEP 2005 FY: 2005
INVESTIGATOR: Quinn, F. D.
PERFORMING INSTITUTION:   College of Vet Medicine.  University of Georgia. 110 Riverbend Road, Athens, Georgia 30602
SUBJECT:  Crohn’s disease: potential acquisition through pasteurized milk.
NON-TECHNICAL SUMMARY: Mycobacterium paratuberculosis causes Johne’s disease in cattle and other ruminants and may cause Crohn’s disease in humans.  We propose to expose a strain of mouse routinely used in inflammatory bowel disease studies to M. paratuberculosis antigens combined with homogenized and pasteurized milk fat to determine if this exposure is associated with the time of onset and nature of observed Crohn’s-like illness.
OBJECTIVES: Mycobacterium avium subspecies paratuberculosis (M. paratuberculosis) causes Johne’s disease, a chronic granulomatous enteritis in cattle and other ruminants.  The organism is primarily shed in feces, but has also been isolated in milk from cows with clinical disease, subclinical infection and occasionally from bulk milk.  A possible link between M. paratuberculosis and Crohn’s disease in humans has been postulated with milk as a potential source of infection.  Pasteurization of milk is a critical control point in reducing the risk of human consumption of viable M. paratuberculosis bacilli.  In a paper tabled at the UK Advisory Committee on the Microbiological Safety of Food it was announced that M. paratuberculosis had been isolated from commercially pasteurized milk.  Methods for improving the pasteurization process to completely eliminate viable M. paratuberculosis bacilli have been proposed and are under consideration.  However, before the expense and effort are put forth to potentially change industry processes and standards, we suggest ruling out another possibility, that heat-killed M. paratuberculosis bacilli serve as an adjuvant to enhance immune response to antigens in the intestinal lumen.  Homogenized milk is an oil-in-water emulsion, and the addition of heat-killed M. paratuberculosis finishes the recipe for Complete Freund’s Adjuvant, a powerful stimulant of immune response.  While it is unlikely that the form of lipid in milk and the concentrations of lipid and mycobacterial components are optimal for adjuvant activity, they may be sufficient to push susceptible consumers into disease.  Much observational and experimental data available support this as a possible mechanism.  We propose to expose a strain of mouse routinely used in inflammatory bowel disease studies to M. paratuberculosis antigens combined with homogenized and pasteurized milk fat to determine if this exposure is associated with the time of onset and nature of observed Crohn’s-like illness.  If pasteurization, one of the most successful public health measures ever devised and the basis of our milk safety program is an essential component of this pathogenic mechanism, the dairy industry and regulatory agencies will face a dilemma.
APPROACH: If our hypothesis is correct, persons likely to become ill from foodborne and other exposures to M. paratuberculosis (MAP) will either be immune compromised and develop invasive multi-system disease that may or may not involve the gastrointestinal tract, or have a poorly regulated Th1 response to enteric microflora, perhaps including MAP.  The proposed experiments will explore the latter by using a rodent model of spontaneous enteritis that has a predictable onset of clinical disease associated with inflammatory cytokine imbalance.  In addition, because of the influence of lipid vehicles on Th1/Th2 response to antigens, MAP delivered in a lipid food matrix is more likely to stimulate a Th1 dominated response.  Therefore, this proposal will use high-fat vehicles derived from foods that may be naturally contaminated with MAP.  Several animal models of spontaneous and induced intestinal inflammation have been developed to investigate the etiology and pathogenesis of inflammatory bowel disease (Crohn’s disease and ulcerative colitis).  One model, the SAMP1/Yit mouse, develops a syndrome that closely resembles Crohn’s disease in that it spontaneously develops and most intensely involves the ileum with segmental, transmural granulomatous enteritis.  Onset of illness in the mice begins around 20 weeks of age, with nearly 100% affected by 30 weeks of age and continuation of lesions and illness at least through 80 weeks of age.  Disease appears to be mediated by an abnormal TNF-alpha &#61472;and IL-12 response.  To test the hypothesis that early exposure to MAP antigens may be a triggering event in the pathogenesis of Crohn’s disease, we propose to expose SAMP1/Yit mice to MAP antigens before their anticipated onset of enteritis to determine if this exposure is associated with modifications in the time of onset and nature of illness.  The presence of heat-killed Mycobacterium species in milk gives it adjuvant-like qualities that induce a helper T cell type 1 (Th1)-dominated immune response to bacterial antigens present in the guts of persons with a certain genetic background.  The inciting antigens are likely to be normal enteric flora but may be mycobacterial antigens.  Twenty-eight SAMP1/Yit mice will be acquired at 4 weeks and 28 mice at 8 weeks from Harlen, U.K.  The mice in each age group will be divided into 4 groups of 7 in micro-isolator boxes.  The mice will be exposed to cream or cream with live/killed MAP daily for 5 days by gavage at either 5 weeks or 10 weeks of age.  The specific concentrations of bacteria will be 0.0 mg bacteria (diluent only), 0.1 mg heat-killed sonicated bacterial, 1.0 mg heat-killed sonicated bacteria, or 10 logarithmic phase viable MAP bacilli.  The mice will be observed daily for clinical signs of illness, especially enteritis.  At 20 weeks of age (either 10 or 15 weeks post exposure), blood will drawn from 3 mice from each box and serum obtained.  These mice will then be sacrificed and gross necropsy and histopathologic examinations performed.  Cytokine Luminex ELISA assays will be performed on the isolated sera.  At 30 weeks of age, the remaining mice will be sacrificed and similar analyses performed.  PROGRESS: 2004/01 TO 2004/12.  A hallmark of host response to all mycobacterial infections (and Crohn’s disease) is granuloma formation: a collection of macrophages and T-cells that are thought to wall off and isolate the invading bacilli.  We recently reported on the development of an in vitro granuloma model system for the study of mycobacterial immune responses.  We demonstrated that M. tuberculosis bacilli cause the formation of an in vitro granuloma that is indistinguishable from those found in vivo in guinea pigs, rabbits, primates and humans when compared by cell type, cell ratios, presence of landmark structures such as multinucleated giant cells and the production profiles of specific cytokines.  We recently examined in vitro granuloma formation using viable and heat-killed M. paratuberculosis as the inoculum.  Tissue culture supernatants collected from this model were also examined for types and levels of relevant secreted cytokines.  No granuloma formation was observed in the PBMC cultures without the addition of a mycobacterial inoculum. Structurally identical granulomas were observed whether M. tuberculosis, M. paratuberculosis or heat-killed/sonicated M. paratuberculosis was used as the inoculum.  A compilation of cytokine data from numerous sources indicates that elevated and some decreased levels of several cytokines have been observed in the blood and intestinal mucosa of Crohn’s patients.  Specifically elevated are the cytokines indicative of the Th1 response (including IL-2, IL-8, IL-12, IL-18, TNF-a &#61472; and INF-g) while decreased levels of Th2 cytokines are observed (IL-4 and IL-10).  Using supernatants from the viable and heat-killed M. paratuberculosis in vitro granulomas described above, we observed at least 2-fold increased levels of IL-2, IL-8, TNF-a and INF-g with very low levels of IL-10 compared to supernatants from uninfected controls (IL-12 and IL-18 were not assayed).  These preliminary in vitro data may demonstrate a correlation with in vivo immune responses seen in Crohn’s patients.  More importantly, both viable and heat-killed bacilli produced a similar and very strong immune response.  We felt that the next step should be confirming these data in an appropriate animal model.  Twenty-eight SAMP1/Yit mice were acquired at 4 weeks of age and 28 mice at 8 weeks of age.  The mice in each age group were divided into 4 groups of 7 in micro-isolator boxes and exposed to cream or cream with live/killed M. paratuberculosis daily for 5 days by gavage at either 5 weeks or 10 weeks of age.  The mice were observed daily for clinical signs of illness, especially enteritis.  At 20 weeks of age (either 10 or 15 weeks post exposure), blood was drawn from 3 mice from each box and serum obtained.  These mice were [will?] then be sacrificed and gross necropsy and histopathologic examinations performed.  Cytokine Luminex ELISA assays are being performed on the isolated sera.  At 30 weeks of age, the remaining mice were sacrificed and similar analyses performed.  No data from these analyses are currently available to report.  
IMPACT: 2004/01 TO 2004/12.  Pasteurization of milk is a critical control point in reducing the risk of human consumption of viable M. paratuberculosis bacilli.  Methods for improving the pasteurization process to completely eliminate viable M. paratuberculosis bacilli have been proposed and are under consideration.  However, before the expense and effort are put forth to potentially change industry processes and standards, we suggest ruling out another possibility, that heat-killed M. paratuberculosis bacilli serve as an adjuvant to enhance immune response to antigens in the intestinal lumen.  Homogenized milk is an oil-in-water emulsion, and the addition of heat-killed M. paratuberculosis finishes the recipe for Complete Freund’s Adjuvant, a powerful stimulant of immune response.  While it is unlikely that the form of lipid in milk and the concentrations of lipid and mycobacterial components are optimal for adjuvant activity, they may be sufficient to push susceptible consumers into disease.  Much observational and experimental data available support this as a possible mechanism.  We propose to expose a strain of mouse routinely used in inflammatory bowel disease studies to M. paratuberculosis antigens combined with homogenized and pasteurized milk fat to determine if this exposure is associated with the time of onset and nature of observed Crohn’s-like illness.  If pasteurization, one of the most successful public health measures ever devised and the basis of our milk safety program is an essential component of this pathogenic mechanism, the dairy industry and regulatory agencies will face a dilemma.
PUBLICATIONS: 2004/01 TO 2004/12
No publications reported this period
PROJECT CONTACT:
     Name: Quinn, F. D.  Phone: 706-542-5790.  Fax: 706-542-5771
     E
mail: fquinn@vet.uga.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 15 DEC 2005 TERM: 14 DEC 2006
INVESTIGATOR: Karls, R.; Pence, M.
PERFORMING INSTITUTION: College of Vet Medicine.  University of Georgia. 110 Riverbend Road Athens, Georgia 30602
SUBJECT:  Isolation of mycobacteriophage that target M. avium ssp. paratuberculosis.
NON-TECHNICAL SUMMARY: Antibiotic treatment of cattle infected with Johne's disease is not practical.  This purpose of this project is to isolate and develop mycobacteriophages that may serve as a cost-effective intervention strategy to prevent disease transmission.
OBJECTIVES: This project seeks to isolate mycobacteriophage that can target Mycobacterium avium ssp. paratuberculosis that may be developed into a therapeutic intervention strategy to prevent transmission of Johne's disease.  The goal is to obtain multiple mycobacteriophage that enter the host via different receptors to minimize the likelihood of resistance to infection.
APPROACH: Soil and manure samples from farms with known Johne's Disease will be screened for the presence of mycobacteriophages using a plaque assay.  Once mycobacteriophages have been identified, the mycobacterial host range of each will be determined using both saprophytic and pathogenic mycobacterial species.  Those that can infect M. avium ssp. paratuberculosis (MAP) will be characterized further.  They will be assayed on a variety of MAP strains to identify whether any target a host receptor that is absent on some clinical MAP strains.  Phage plaque morphology will be examined for the presence of a lysogenic growth stage (turbid plaque phenotype).  Genetic analysis of phage that target MAP will be performed.  If necessary, the repressor of lysogeny will be disrupted to produce phage that grow only in a lytic mode.
PROJECT CONTACT:
     Name: Karls, R.  Phone: 706-542-2584.  Fax: 542-5771
     E
mail: rkarls@vet.uga.edu

PROJ TYPE: HATCH PROJ STATUS: TERMINATED MULTISTATE PROJ NO: NC-62
START: 01 OCT 2000 TERM: 30 SEP 2002 FY: 2002
INVESTIGATOR: Wu, C. C.; Lin, T. L.
PERFORMING INSTITUTION:  Veterinary Pathobiology.  Purdue University.  West Lafayette, Indiana 47907.
SUBJECT:  Enteric diseases of swine and cattle: prevention, control and food safety.
NON-TECHNICAL SUMMARY: Johne's disease causes chronic enteritis in cattle and contributes to significant economic loss in the dairy cattle industry.  The mechanisms by which Mycobacterium paratuberculosis enter the intestinal cells are poorly understood.  The purpose of the project is to determine the role of fibronectin attachment protein in the first steps of the pathogenesis of Johne's disease.  Immunomagnetic-capture PCR assay will also be developed to rapidly detect Mycobacterium paratuberculosis in bovine feces.
OBJECTIVES: 1. Define mechanisms of enteric disease pathogenesis.  2. Develop new and improved methods of diagnosis, prevention and control of enteric disease.
APPROACH: Mycobacterium paratuberculosis (Mpt) genome will be screened for fibronectin attachment protein (FAP) homologues using fibronectin binding assay and a PCR-generated fragment of FAP from Mycobacterium avium as a probe.  Segments of the FAP gene will be cloned in antisense orientation into a transcription vector and introduced into Mpt.  Wild type Mpt and anitsense mutants will be used to determine fibronectin-mediated attachment and internalization by Mpt in vitro and in vivo.  In addition, DNA will be extracted from Mpt in feces captured by magnetic beads linked to antimycobacterial antibodies and subjected to PCR.  The immunomagnetic-capture PCR assay will be used to test field samples for the presence of Mpt. PROGRESS: 2000/10 TO 2002/09.  Mycobacterium avium subsp. paratuberculosis expresses a fibronectin- attachment protein (FAP) homologue, FAP-P, which is required for binding of fibronectin (FN).  Several FAPs have been shown to mediate FN-dependent attachment and internalization of mycobacteria in vitro, suggesting an important role for these proteins in the pathogenesis of mycobacterial disease.  The objective of the present study was to determine if the interaction of FAP-P and FN contributed to the attachment and internalization of M. avium subsp. paratuberculosis by epithelial cells in vitro.  Infection of T-24 bladder epithelial cells and Caco-2 intestinal epithelial cells with FN-opsonized organisms led to a 1.5 to 2-fold increase in the number of cells that had attached mycobacteria relative to those infected with non-opsonized bacteria.  The frequency of invasion of both cell lines by M. avium subsp. paratuberculosis was enhanced 2.5 to 3-fold in the presence of FN.  The addition of the FN binding peptide from M. avium subsp. avium FAP did not diminish bacterial attachment to either cell line; however, peptide treatment inhibited internalization of bacteria by both cell lines by greater than or equal to 65%.  Attachment and internalization of antisense and natural FAP-P mutants of M. avium subsp. paratuberculosis by both cell lines were reduced by 35-55% and 50-80%, respectively.  The results indicate that FN facilitates attachment and internalization of M. avium subsp. paratuberculosis by epithelial cells in a FAP-P-dependent manner.
IMPACT: 2000/10 TO 2002/09.  Fibronectin facilitates attachment and internalization of M. avium subsp. paratuberculosis by epithelial cells in a FAP-P-dependent manner.  Attachment of Mpt to M cells and the subsequent translocation of organisms by these cells to the underlying gut-associated immune tissue are the necessary initial steps in the development of paratuberculosis.  By gaining an understanding of the mechanisms and macromolecules involved in these processes, one can begin to develop herd management and immunization strategies that may limit the spread of infection within herds.
PUBLICATIONS: 2000/10 TO 2002/09
1. Secott, TE, Lin, TL, and Wu, CC. 2002. Fibronectin attachment protein is necessary for efficient attachment and invasion of epithelial cells by Mycobacterium avium subsp. paratuberculosis. Infection and Immunity, 70: 2670-2675.
2. Secott, T. E.; Lin, T. L.; Wu, C. C. 2002. Fibronectin-attachment protein mediates in vivo invasion of M cells by Mycobacterium avium subsp. paratuberculosis. The Proceedings of the 2002 Annual Meeting of The American Society for Microbiology, page 121.
PROJECT CONTACT:
     Name: Wu, C. C.  Phone: 765-494-7459.  Fax: 765-494-9181
     E
mail: wuc@purdue.edu, and  mailto:tllin@purdu.edu

PROJ TYPE: HATCH PROJ STATUS: REVISED
START: 01 OCT 2005 TERM: 30 SEP 2008 FY: 2005
INVESTIGATOR: Vemulapalli, R.; Wu, C. C.; Lin, T. L.
PERFORMING INSTITUTION:  Veterinary Pathobiology.  Purdue University. West Lafayette, Indiana 47907
SUBJECT:  Immunological characterization of potential protective proteins of Mycobacterium paratuberculosis.
NON-TECHNICAL SUMMARY: No suitable vaccines are presently available for prevention and control of bovine paratuberculosis.  Using a mouse model, this project examines the proteins of M. paratuberculosis to identify a protective protein that can used to develop recombinant vaccine against paratuberculosis.  The proposed research will aid in the development of a recombinant vaccine against bovine paratuberculosis.
OBJECTIVES: Johne's disease, also known as paratuberculosis, is a significant health and economic problem to cattle industry worldwide (1,2,3).  The causative agent of this diseases is Mycobacterium avium subspecies paratuberculosis (M. paratuberculosis), a slow growing, facultative intracellular bacterium that is very closely related to Mycobacterium avium subspecies avium (M. avium).  Several antigens are common to both M. avium and M. paratuberculosis and they contain high percentage of identity at amino acid level.  Presently, no effective vaccine is available for use in cattle against this disease.  Our current knowledge about M. paratuberculosis antigens involved in eliciting host protective immune responses to the infection is very minimal (3).  Researchers' ability to conduct in-depth studies is severely restricted by the lack of a single, suitable laboratory animal model as well as the very slow multiplication rate and prolonged incubation period of M. paratuberculosis (>2 years).  In comparison, M. avium multiplies faster and readily infect in-bred strains of mice, and following parenteral inoculation, the bacteria disperse to various organs and replicate to high numbers in spleen, liver and lung.  The overall objective of this revised research project is to characterize the immunological properties of several M. paratuberculosis proteins by generating DNA vaccines and characterizing the elicited immune responses in mouse models.  Protective potential of the immunogenic proteins will be determined by challenging the immunized mice with M. avium.  Objective 1. Generation of DNA vaccines with selected M. paratuberculosis proteins.  In Johne's disease, the onset of clinical signs coincident with a switch in the host immune response from Th1 to Th2 type.  Therefore, development of a robust Th1 type immune response is required for resistance against clinical disease in M. paratuberculosis infection.  DNA vaccines are well known to induce strong Th1-biased immune responses.  We will select several potential protective proteins of M. paratuberculosis and construct their DNA vaccines using commercially available mammalian expression vectors.  Objective 2.  Immunological and protection studies with the DNA vaccines in BALB/c and/or C57BL/6 strains of mice.  We will first immunize BALB/c mice with the DNA vaccines and study their immune responses, particularly phenotypic characterization of antigen-specific T cells, antigen specific production of interferon-g (INF-g) and other cytokines, antigen-specific cytotoxic T cells, and isotypes of antibodies induced, if any.  Based on our previous experience, BALB/c mice may not develop specific immune responses against certain M. paratuberculosis proteins.  In such cases, we will conduct the immunological studies in C57BL/6 mice.  Information thus generated will be used to screen and identify potentially protective proteins of M. paratuberculosis.  We will then carryout challenge experiments in both BALB/c and C57BL/6 mice with M. avium to determine their cross protection pontential.
APPROACH: Construction of DNA vaccines: DNA vaccines will be constructed using pSecTag2 mammalian expression plasmid (Invitrogen, Inc.).  The genomic DNA of a virulent, cattle isolate of M. paratuberculosis will be extracted (4) and the coding sequences of the selected proteins of M. paratuberculosis will be amplified via PCR using the specifically designed primer-pairs and the genomic DNA as template.  The amplified fragments will be cloned into pSecTag2 and then sequenced to confirm the integrity of the gene sequence.  Confirmation of expression of the protein by DNA vaccine construct.  The ability of the DNA vaccine constructs to express the cloned gene products will be confirmed in vitro.  For this, COS-7 cells will be transfected with each one of the DNA vaccine plasmids and the cells will be assayed for the expressed products by Western blot analysis using mouse and cattle antisera to M. paratuberculosis.  Vaccine preparation.  E. coli cells harboring the plasmids containing the DNA vaccine constructs will be grown in large volumes of liquid broth.  The plasmids will be extracted from the E. coli cultures using EndoFree Mega Prep kits (Qiagen, Inc.).  The extracted plasmids will be dissolved in phosphate buffered saline (PBS) solution at a concentration of 1 mg/ml and stored at -20 degrees C until use.  Mice immunization and testing of selected immune responses.  Female mice of 6-8 week old will be used.  Group of 5 mice will be injected intramuscularly with 100 ug of DNA vaccine.  Mice receiving PBS will serve as controls.  At 2 and 4 weeks after initial immunization, same dose of vaccine will be given as boosters.  All the mice will be bled retro-orbitally to collect serum samples before immunization and at 4 and 6 weeks post-immunization.  At week 6, mice will be euthanatized and their splenocytes will be used for characterization of T cell responses.  For some vaccines, it may be necessary to give additional booster(s) to induce antigen-specific immune responses.  The specific antibody response will be determined using immunoblot (Western) analysis and ELISA.  The T cell responses will be analyzed by detection of cytotoxic T lymphocytes and T cells secreting IL-4, IL-5 and INF-g when co-cultured with M. paratuberculois-infected macrophages and upon stimulation with the specific antigens.  Protection studies. Groups of 5 mice will be immunized with the selected DNA vaccines as described above.  A group of 5 mice will be injected with PBS and serve as unvaccinated control.  Two weeks after the last booster immunization, mice will be challenged with 100,000 colony forming units (CFU) of M. avium.  Four after the challenge, the mice will be euthanatized and their spleens, livers and lungs will be harvested.  The bacterial burden in the collected organs will be determined by homogenizing the tissues and then plating the 10-fold dilutions of the homogenates on Middlebrook 7H9 agar plates supplemented with OADC enrichment.  The decrease in the number of bacteria in each organ of the vaccinated mice will be compared to that of unvaccinated mice and used as a measurement to calculate the protective efficacy.
PROGRESS: 2005/01 TO 2005/12.  Four selected antigens [fibronectin attachment protein (FAP), antigen 85-B, major membrane protein (MMP), and Mn-superoxide dismutase (SOD)] of Mycobacterium paratuberculosis were expressed in Brucella abortus vaccine RB51 using plasmids containing different promoter elements.  These antigens were also overexpressed in E. coli and then purified for use in immune response analyses.  Stable expression of FAP and MMP in B. abortus RB51 could not be achieved with any of the plasmid constructs tested.  In contrast, the expression of 85-B and SOD antigens was found to be very stable in B. abortus RB51 harboring specific recombinant plasmids.  The ability of the recombinant RB51 strains to induce heterologous antigen-specific immune responses was tested in BALB/c mice and found it to be less efficient; though antigen-specific antibody and T cell responses were detected in the vaccinated mice, the degree of these immune responses was low as determined by the amount of interferon-gamma secreted by the T cells upon stimulation with purified 85-B and SOD.  Therefore, as an alternate strategy, a replication defective human adenoviral vector system (hAd) was used for the expression and delivery of the 85-B and SOD antigens.  Intramuscular inoculation of the recombinant hAd expressing 85-B antigen induced higher levels of antigen-specific T cell responses.  Furthermore, priming with RB51/85-B and subsequent boosting with hAD-85B resulted in the highest level of Th1 type-biased 85B-specific T cell responses.  To determine the protective ability of the induced 85B-specific immune responses, the vaccinated mice were challenged with virulent M. avium, bacteria that are antigenically very closely related to M. paratuberculosis.  Based on the tissue bacterial burden, mice in the vaccinated groups, in comparison with the unvaccinated control group, did not show significant level of resistance against the challenge.  Studies to examine the protective potential of SOD using both recombinant RB51 and hAD expression systems are ongoing.
IMPACT: 2005/01 TO 2005/12.  The findings of this research will aid in the development of a recombinant vaccine against bovine paratuberculosis
PUBLICATIONS: 2005/01 TO 2005/12.
1. Gulani, J. and Vemulapalli, R. 2004. Expression of potential protective proteins of Mycobacterium avium subsp. paratuberculosis in Brucella abortus RB51, a new approach to vaccine development against Johne’s disease. 104th General Meeting of American Society for Microbiology, Ernest N. Memorial Convention Center, May 23-27, New Orleans, LA.
2. Sanakkayala, N., Gulani, J., Vemulapalli, R. 2004. Induction of specific mucosal and systemic immune responses by intranasal inoculation of mice with live and gamma-irradiated recombinant Brucella abortus RB51. 57th Brucellosis Research Conference. Nov. 13-14, 2004, Chicago, IL.
PROJECT CONTACT:
     Name: Vemulapalli, R.  Phone: 765-494-7560  Fax: 765-494-9830
     E
mail: rvemulap@purdue.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 OCT 2004 TERM: 30 SEP 2009 FY: 2005
INVESTIGATOR: Davis, J. K.
PERFORMING INSTITUTION:  Veterinary Pathobiology.  Purdue University. West Lafayette, Indiana 47907
SUBJECT:  Johne's disease: mouse model and host gene expression in resistant and susceptible mice.
NON-TECHNICAL SUMMARY: Mycobacterium avium ssp. paratuberculosis (MAP) causes Johne's disease, a chronic wasting disease of cattle and sheep.  MAP is also one of the organisms that have been implicated in Crohn’s's disease of humans.  Recent studies show that routine pasteurization does not kill the organism.  The purpose of this project is to determine which host defense genes are expressed differently in mice that are resistant to MAP vs. those expressed in susceptible mice.  The differences in gene expression between the two mouse strains will highlight which host defenses are preventing development of Johne's disease in mice.  This information can then be used to guide studies in cattle to determine if similar host responses occur and ultimately to guide the development of vaccines to prevent the disease in ruminants.
OBJECTIVES: Our central hypothesis is that both nonspecific antibacterial defenses and adaptive immune responses operative in the digestive tract comprise an integrated system of cellular and noncellular components whose interactions with Mycobacterium avium ssp. paratuberculosis (MAP) determine disease expression in Johne's disease.  Furthermore, this network can be directly analyzed by global gene expression, and disease resistance can be categorically differentiated from disease susceptibility.  Effective vaccines will induce alterations in gene expression that simulate patterns seen in animals that are resistant to disease.  The best way to test this hypothesis is to compare global gene expression in a well-defined model system where parameters of disease expression can be tightly controlled, yet experimentally manipulated.  Thus, our long range objectives are to (i) Characterize and standardize MAP infections of resistant (C3H/HeN) and susceptible (C57BL/6) mice; (ii) Contrast constitutive expression of immune response genes in the gastrointestinal tracts of C3H/HeN and C57BL/6 mice; and (iii) Contrast global expression of immune response genes between resistant and susceptible mice following infection with MAP.
APPROACH: OBJECTIVE I. Standardization of murine model.  C3H/HeN mice are resistant, and C57BL/6 mice are susceptible to MAP infection but differences between the two strains have not been quantified.  These experiments will characterize the relationships between organism dose and disease progression.  Mice will be given MAP by oral gavage in a dose response study.  Six mice from each experimental group will be killed at various times PI and sections of the GI tracts, mesenteric lymph nodes, spleen, and liver will be processed for histological assessment of lesions and demonstration of organisms by acid fast stains.  Lesions for each organ will be scored by pathologists.  Additional portions of these tissues, plus fecal pellets, will be used to quantify the numbers of MAP.  The infectious dose 50%, gross lesion dose 50% and histologic lesion dose 50% will be calculated.  OBJECTIVE II. Contrast Constitutive Expression of Immune Response Genes Between Mouse Strains.  These experiments will identify the constitutive differences in the expression of immune response genes in the GI tracts of susceptible and resistant strains of mice.  Definition of these differences in naive animals provides the background database upon which the subsequent experiments are built.  Naive mice of both genotypes will be examined at 2 months, 8, 11, 14, and 17 months of age.  Serum, jejunum, ileum, cecum, and colon will be collected and processed for isolation of mRNA for use with Affymetrix GeneChip mouse microarrays.  This experiment will also determine how gene expression profiles differ among anatomical sites and at different ages.  OBJECTIVE III. Contrast global expression of immune response genes between resistant and susceptible mice during infection with MAP.  The experimental design concentrates on early events in infection.  Animals of both strains will be infected with MAP and 6 will be killed at various times PI.  Three animals from each group will be used for microarray analyses and three will be used for enumeration of MAP numbers in tissues.
PROCEDURES. Mycobacteria.  An oral vaccine candidate developed by Infectious Diseases Inc. (IDI) will be contrasted with a clinical MAP isolate.  Quantitative cultures and real time quantitative PCR of MAP from tissues will be done on tissues from the GI tract.  Tissues will be collected and processed for histology and stained using standard methods.  Each will be transected longitudinally, one half will be used for histology, the other for cultures, quantitative PCR, and microarray analyses.  Samples will be processed as recommended for Affymetrix GeneChip mouse microarrays.  Data will be analyzed using Affymetrix GeneChip Software.  STATISTICS AND DATA INTERPRETATION. Nonparametric data will be analyzed by the Kruskal-Wallis test.  All parameteric data will be analyzed by ANOVA.  Microarray analyses will focus on testing the hypothesis that global gene expression in the GI tracts of different strains of mice will be perturbed by MAP infection, and that the expression of immune response genes will be related to strain differences in susceptibility.
PROGRESS: 2004/10 TO 2005/09.  Although experiments have not begun on the project, progress in providing the infrastructure necessary for the performance of the project has been completed.  We have secured approval for the project from the Animal Care and Use Committee and obtained the required permits from the USDA that allow us to ship and receive the isolates of Mycobacterium avium ssp paratuberculosis that are required for the experimental infections.  The unexpected long delay in receiving this permit prevented starting the experimental infections.  The organisms were obtained in late September 2005 and are currently being grown to sufficient quantities for the experimental infections and the necessary quality control experiments needed before we use the organisms.  Since these organisms take weeks to months to grow, we anticipate infecting the mice in January 2006.  We will perform the quality control testing of the organisms to ensure their purity and other characteristics while we are waiting on the large batches of cultures needed for the experimental infections.  The appropriate space and animal housing materials for this project have been identified and where necessary, been purchased so that the experimental infections can proceed quickly once the inocula are obtained.  We have consulted our collaborators for the best methods to use for the completion of the microarray assays outlined in the project description and have obtained the supplies for these assays.  We also have recruited a graduate student who will work on this project which will facilitate many of the procedures we will use throughout the entire project.  Although not directly related to the project as outlined, another project related to Johne's disease will interface with this current project.  The collaborators for this study are also proceeding with studies in cattle and Drs. Davis and Davidson's laboratory is developing ELISPOT assays for use in cattle and with the infected mice model for determination of antigen specific cytokine production from circulating memory lymphocytes.  The goals of these studies are to determine the cytokine profile during different stages of Johne's disease in cattle and at different time post infection in mice.  These results will be needed to compare the mouse model to the disease in cattle as well as the efficacy of any vaccine candidates.  Thus, these experiments will enhance and supplement the findings from the proposed mouse models outlined in the original proposal.
IMPACT: 2004/10 TO 2005/09.  Johne's disease is a serious disease of cattle and sheep which has striking similarities to Crohn’s's disease of humans.  There are problems with using farm animals simply because they are large, expensive to maintain, and the progression of disease is slow which severely hampers many studies.  Fully developing and describing a model of Johne's disease in mice would greatly facilitate study of this disease.  The purpose of this project is to fully develop a mouse model of Johne's disease in mice and to determine which genes are responsible for preventing Johne's disease in mice.  Because the disease process is so complex, we believe the best way to determine which host defense genes are important in protection from disease is to contrast the overall gene expression in mice which are susceptible to disease to the gene expression in mice which are resistant to disease.  Once we have identified the set of host defense genes that differ between the mouse strains, we can use these results to determine whether or not the same genes are involved in resistance to the disease in cattle, and ultimately, to use this knowledge to help design vaccines which will help prevent disease in cattle.  In addition, development of the mouse model will allow scientists to use this model to elucidate the progression of the disease, the factors which exacerbate or ameliorate disease, and which treatments are effective.
PUBLICATIONS: 2004/10 TO 2005/09
Schleig, PM, Buergelt, CD, Davis, JK, Williams,E, Monif, GRG, and Davidson, MK. 2005 Attachment of Mycobacterium avium subspecies paratuberculosis to bovine intestinal organ cultures: method development and strain differences. Vet Microbiol. 108: 271-279.

PROJECT CONTACT:
     Name: Davis, J. K.  Phone: 765-494-1234.  Fax: 765-496-7989
     E
mail: davis39@purdue.edu

 

PROJ TYPE: HATCH PROJ STATUS: NEW
START: 01 JUL 2006 TERM: 30 JUN 2009
INVESTIGATOR: Raizman, E. A.; Wu, C. C.; Glickman, L.; Long, T.; Kenyon, S.
PERFORMING INSTITUTION:  Veterinary Pathobiology.  Purdue University. 
West Lafayette, Indiana 47907
SUBJECT:  Epidemiologic studies of Johne’s disease in dairy and beef cattle.
NON-TECHNICAL SUMMARY: A- There is lack of knowledge about the distribution of Map in the environment of beef cattle.  B- Environmental sampling has been used on dairy farms to determine herd infection status, however, it is necessary to improve this method on targeted sampling in cow alleyway and manure storage A.  The project will examine the effectiveness of environmental sampling to determine herd infection status on beef operations, especially mother-calf systems.  B. The project will try to improve the current environmental sampling method using cow alley and manure storage.
OBJECTIVES: 1) To determine the prevalence and the distribution of Map in the environment of beef cattle. The hypothesis for this objective is that there is an association between Map herd prevalence and Map prevalence in the environment.  2) Improve predictive value of environmental sampling for assessment of the prevalence of Map on dairy farms using samples from cow alleyway and manure storage.  The hypothesis for this objective is that the Map prevalence (bacteria load) and therefore the predictive value of the environmental sampling, will vary among the different lactation groups in the herd (i.e. early, mid, and late lactation).
APPROACH: Objective 1: A cross-sectional study design will be conducted using approximately 40 beef herds in Indiana with a previous history of JD (ELISA or fecal culture).  Herds must have at least 50 adult cows and at least 3 years on the current premise.  Eligible herds will be randomly selected from the Indian Board of Animal Health data base.  Herd owners will be contacted by a letter for voluntary participation.  Sample size calculation (i.e. number of herds and number of sampled cows in each herd) assumed fecal culture prevalence 3% with 85% power and 95% confidence.  Fecal samples will be tested using the liquid fecal culture method.  In each herd, fecal samples will be obtained from up to 100 cows using disposable sleeves and will be ordered randomly into pools of five cows each.  In each herd, environmental samples will be collected using the methodology described by Raizman et al (2004).  Two environmental samples of manure with or without dirt will be obtained on each farm from different areas where manure accumulation occurs (such as calving area, pasture area, crowding area, etc).  The association between herd infection status based on fecal pool prevalence and Map in the environment will be evaluated using appropriate statistical methods.  Objective 2: Approximately 20 dairy herds will be in a longitudinal study design.  Herds will have at least 120 milking cows and use a free-stall housing system, where cows are divided into several lactation groups (i.e. early, mid, and late lactation).  Eligible herds will be randomly selected from the Johne’s Disease Control Program data base of Indiana Board of Animal Health.  Herd owners will be contacted by a letter for voluntary participation.  The Sample size calculation assumed fecal culture prevalence 10% with 85% power and 95% confidence.  Two samples will be obtained from different lactation groups pens and up to 4 samples from manure storage areas as described by Raizman et al (2004).  In addition, from each lactation pen, up to 20 individual fecal samples will be collected to estimate the pen prevalence.  In order to characterize the distribution of Map through the year, in both cow alleyways and manure storage sampling will be performed every 3 months for 3 years.
PROJECT CONTACT:
     Name: Raizman, E. A.  Phone: 765-494-7727.  Fax: 765-494-9830
     E
mail: eraizman@purdue.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 15 JUN 2005 TERM: 30 SEP 2009 FY: 2005
INVESTIGATOR: Lelievre, S. A.
PERFORMING INSTITUTION:  Veterinary Basic Medical Science.  Purdue University.  West Lafayette, Indiana 47907
SUBJECT:  Targeting apical polarity to control tissue differentiation and bacterial infection.
NON-TECHNICAL SUMMARY: Alterations in apical polarity, a cellular organization typical of differentiated organs, are involved in the development of skin, renal, pulmonary, and bowel pathologies.  Apical polarity also influences infection and/or spreading by many viruses and bacteria.  Our goal is to identify the genes that specifically control apical polarity and could be used as therapeutic targets.
OBJECTIVES: Baso-apical polarity is a hallmark of differentiated epithelial tissues and refers to the asymmetrical internal organization of epithelial cells within these tissues.  Loss of apical polarity is an early event in skin, renal, pulmonary and bowel diseases.  In addition, apical polarity plays a critical role in the spreading of a number of devastating viral and bacterial infections.  Thus, the control of apical polarity appears critical for the management of many diseases that affect farm animals.  Unfortunately, the genomic determinants involved in the proper location of apical polarity markers, and thus functional apical polarity, are not yet identified.  When differentiating mammary epithelial cells are induced to demethylate their DNA upon treatment with 5-Aza-deoxycytidine, the formation of apical polarity is specifically prevented.  These data demonstrate that genes regulated by methylation play a critical role in the establishment of apical polarity, and provide us with a working model to identify the genes, and subsequently the proteins involved in the control of apical polarity.  We will examine tissue cultures of models of polarized and non-polarized cells and analyze gene expression in these cells using microchip technology and multi-pronge statistical analysis to discover the genomic characteristics (the genes and their methylation status) of apical polarity.  This project is critical for future development of two major areas of research: (1) the discovery of genes involved in the control of apical polarity (called CAP genes) could be used to design a microchip tailor-made for the identification of methylation-linked alterations in the expression of these genes in a broad range of diseases; (2) the manipulation of methylation has been proposed as a new treatment strategy, therefore pharmacological tools will be sought to selectively modify the expression of CAP genes by manipulating methylation-mediated gene silencing and thus help revert or prevent disease progression.  The objective of this five-year project will be achieved by pursuing five goals: Goal (1) To identify potential genes, called CAP genes, involved in the control of tissue polarity, by comparing microarrays of differentiated mammary cells possessing full polarity and mammary cells treated to induce the lack apical polarity upon alteration of the DNA methylation pathway.  Goal (2) To analyze the expression of CAP genes in cell culture conditions that mimic pathological losses of polarity, including inverted polarity.  Goal (3) To investigate the methylation status of potential CAP genes in polarized and non-polarized tissue structures described in Goals 1 and 2, using bisulfite modification of DNA, followed by methylation sensitive Poly Chain Reaction (PCR) to specifically identify the genes influenced by methylation.  Goal (4) To modify the expression of potential CAP genes in fully polarized tissue structures to verify their involvement in the establishment and/or maintenance of apical polarity.  Goal (5) To modify the expression of CAP genes in cell cultures used to study bacterial infection and identify key regulators of infection spreading for specific infectious agents.
APPROACH: Goal 1. Microarrays will be performed on polarized (control) and non-polarized (hypomethylated by 5Aza treatment) mammary cells cultured in Matrigel using the Affymetrix GeneChip Instrument System.  Statistical analysis will be performed in collaboration with Rebecca Doerge.  Significant alterations in gene expression will be confirmed by reverse transcription-PCR.  It is expected that genes that are controlled by DNA methylation will be upregulated (hypomethylated) in 5Aza-treated cells.  Goal 2.  Inverted polarity will be induced by culturing mammary cells within a collagen I-based extracellular matrix (condition 1).  In addition, the specific lack of apical polarity will be reproduced by culturing a subline of mammary cells (MCF10A-AP) (condition 2) that cannot form properly organized apical polarity in Matrigel.  Microarray analysis will be performed using three different linear model-based statistical analyses that will accommodate the examination of differential expression of each gene for each control/condition comparison, as well as a comparison between the different conditions relative to the control situation.  This set of experiments will enable us to determine whether alterations in the expression of potential polarity (CAP) genes identified in Goal 1 accompany polarity disorders.  Goal 3. DNA obtained from the different cell samples studied in Goals 1 and 2 will be treated with bisulfite to induce the conversion of non-methylated cytosines (DNA bases) into uracyl, while methylated cytosines will remain unmodified.  Primers will be designed to selectively amplify non-methylated or methylated DNA.  The presence of a PCR product, following the use of methylated or non-methylated primers, will indicate the methylation status of the gene of interest.  This step will be indispensable to confirm that alterations in the expression of CAP genes observed in Goals 1 and 2 are linked to changes in their methylation status.  Goal 4. Mammary epithelial cells transfected with each potential CAP gene will be cultured in Matrigel to induce acinar differentiation.  The effect on differentiation will be investigated by looking at the location of the different polarity markers.  Genes whose over expression only affects apical polarity will be classified as CAP genes.  Similar experiments will be performed on canine kidney MDCK cells induced to polarize on permeable filter supports and long-term culture of colon Caco-2 cells.  These cell types are often used to investigate bacterial infection and will be a good control for the preparation of Goal 5.  Goal 5. Dr. Ching-Ching Wu has been studying the mechanisms of infection of Mycobacterium paratuberculosis in polarized epithelial cells.  In collaboration with Dr. Wu, we will investigate the infection of this bacterium in Caco-2 or MDCK cells expressing the different CAP genes selected upon completion of Goal 4.  Infection efficiency will be measured as the ability and degree of adherence and invasion of the bacteria to non-polarized and polarized cells.  We expect that specific alterations in apical polarity induced by the expression CAP genes will affect the potency of, or even abrogate, bacterial infection.
PROGRESS: 2005/06 TO 2005/09.  Polarity is a hallmark of differentiated epithelial tissues and refers to the asymmetrical internal organization of epithelial cells within these tissues.  Loss of apical polarity is an early event in differentiation disorders including cancer, as well as diseases that impair the well being of farm animals like skin, renal, pulmonary and bowel diseases.  In addition, apical polarity plays a critical role in the spreading of a number of devastating viral and bacterial infections.  The goal of our project is to develop a novel approach to the study of genomic influence over tissue polarity, and thus discover the genes that specifically control apical polarity (CAP genes), by combining biochemical manipulation of DNA, 3D models of tissue culture, and microarray analysis.  Since the starting date of this project, less than four months ago, we have recruited a graduate student to work on certain aspects of the project.  This student is currently testing the location of a number of proteins known to be apical markers in non-mammalian tissues and certain mammalian tissues in our three-dimensional (3D) mammary culture system.  This 3D culture system permits the production of polarized mammary glandular structures.  The proteins tested include different claudins, PALS-1, Par 3, PATJ, and Grb-3.  In addition, this student recently identified protein dab-2 as a potentially important apical polarity marker in the mammary epithelium.  These markers will serve as controls for the effect of CAP genes, that will be identified in this project, on tissue polarity (Goal 4).  A postdoctoral scientist in the laboratory has worked on developing a reliable method for extracting total RNA from 35 mm diameter 3D cultures of cells.  3D culture is performed in the presence of Matrigel (a mixture of extracellular proteins) that may affect the RNA extraction procedure.  An important technical step has been to release glandular structures from the Matrigel first, and then proceed with careful washes and centrifugations before trizol-based extraction.  Migration tests performed on microchips at the microarray facility have shown that the RNA isolation technique used in the laboratory gives RNA of high quality for microarray experiments.  Within the next two months, sets of samples corresponding to four separate biological replicates will be prepared according to Goal 1 of the project.  All microarray analyses will be run at once.  An NIH RO-3 grant related to this research topic has been awarded in October 2005 and will help support the salary of the postdoctoral scientist and the microarray analyses.
IMPACT: 2005/06 TO 2005/09  All functional epithelial tissues in the body are asymmetrically organized, as shown by the segregation of different types of proteins between the basal and apical poles of cells.  We have started identifying a number of apically localized proteins in our tissue model that will serve as readout for functional tests needed in order to discover the genes that control apical polarity.  Our approach should lead to novel treatment strategies aiming at altering polarity in infected cells or revert the loss of tissue polarity in differentiation disorders, and thus help stop the progression of these diseases and minimize tissue destruction and mortality, consequently suppressing the financial burden linked to the development of a number of devastating diseases.
PUBLICATIONS: 2005/06 TO 2005/09
No publications reported this period
PROJECT CONTACT:
     Name: Lelievre, S. A.  Phone: 765-496-7793  Fax: 765-494-7881
     E
mail: lelievre@purdue.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2001-35204-10170 PROPOSAL NO: 2000-02197
START: 01 DEC 2000 TERM: 30 NOV 2003 GRANT YR: 2001 GRANT AMT: $210,000
INVESTIGATOR: Schorey, J. S.
PERFORMING INSTITUTION:  Biological sciences. University of Notre Dame.  Notre Dame, Indiana 46556
SUBJECT:  Defining novel diagnostic and vaccine targets to combat Johne’s disease.
NON-TECHNICAL SUMMARY: Johne’s disease is a chronic intestinal disorder particularly common among dairy cattle and it is estimated that 24% of the dairy herds nationally are infected.  By some estimates the cost of Johne’s disease to dairy farmers exceeds 1.5 billion a year.  This disease is caused by Mycobacterium paratuberculosis, an intracellular pathogen, whose other family members include M. tuberculosis and M. leprae, the causative agents of tuberculosis and leprosy respectively.  Infected cattle shed high numbers of M. paratuberculosis through their feces where it can spread to other members of the herd.  A major interest to dairy farmers is the development of diagnostic tools and vaccines for Johne’s disease.  However, we lack the required information on what M. paratuberculosis proteins initiate an immune response in infected cattle and which of these proteins, when used as a vaccine, would protect the calf or cow from Johne’s disease.  Nevertheless, studies with other pathogenic mycobacteria have identified proteins which produce an immune response in infected animals, including humans.  Further, a number of these proteins were shown to protect an animal host from an active mycobacterial disease when used as a vaccine.  We have chosen to clone the M. paratuberculosis genes corresponding to these homologous proteins which include GroES, fibronectin attachment protein (FAP), 85abc and the 16-KDa a-crystallin homolog.  The proteins corresponding to these genes will be expressed and tested as diagnostic markers to distinguish M. paratuberculosis infected from non-infected cattle.  The proteins will also [sic]? 
OBJECTIVES: To define new antigenic proteins of Mycobacterium paratuberculosis which can be used as diagnostic markers and vaccine candidates for the purpose of eliminating this pathogen from cattle.  This mycobacterium is the etiological agent of Johne’s disease, a common disease in cattle.  We will isolate and characterize mycobacterial protein antigens which elicit a B cell and T cell response in M. paratuberculosis infected cattle and test these antigens as potential vaccine candidates using a mouse M. paratuberculosis infection model.
APPROACH: To use PCR and genetic library screening to clone Mycobacterium paratuberculosis genes which we hypothesize to be immunogenic in infected cattle.  The cloned genes will be expressed as recombinant proteins and tested as diagnostic markers for Johne’s diseased cattle.  Specifically, serum from infected and control cattle will be tested for antibodies to the recombinant proteins by Western blot.  We will also measure the T cell proliferative response to these proteins using T cells isolated from infected and control cattle and the ability of the isolated T cells to produce cytokines in response to these recombinant proteins.  To determine if these proteins would make useful vaccine candidates, mice will be immunized with one or more of these antigens and then challenged with M. paratuberculosis.  A decrease in bacterial load at different times post-infection would indicate a protective response intitiated by the immunization.  Additional diagnostic markers and vaccine candidates will be defined by screening a M. paratuberculosis expression library with serum from infected cattle.  The recombinant proteins within the expression library which show reactivity with antibodies from infected cattle will be purified and tested in the T cell proliferation and cytokine production assays as described above and as vaccine candidates. PROGRESS: 2001/10 TO 2002/09.  Johne's disease is a chronic intestinal disorder particularly common among dairy cattle and it is estimated that 24% of the dairy herds nationally have infected cattle.  This disease is caused by Mycobacterium avium subsp. paratuberculosis (ParaTB).  Infected cattle shed high numbers of ParaTB through their feces where it can spread to other members of the herd.  A major interest to dairy farmers is the development of diagnostic tools and vaccines for Johne's disease.  However, we lack critical information on which genes are specific to ParaTB and not found in other mycobacterial species and which gene products are involved in virulence.  This is particularly important for the development of diagnostic tools since M. avium and ParaTB are approximately 98% identical at the DNA level.  A comparison of these two subspecies is also important from a clinical perspective since M. avium does not cause disease in ruminates.  Therefore, a better understanding of these two subspecies at the genetic level and differences in how macrophages respond to an M. avium compared to ParaTB infection will aid in the development of diagnostic tools specific to ParaTB and the mechanism of ParaTB virulence.  Results: We have recently been focusing our research on glycopeptidolipids (GPLs), a molecule found on the cell surface of many mycobacterial species including M. avium.  Interestingly, preliminary studies indicate that ParaTB do not express GPLs.  This is particularly relevant since GPLs are known to have immune modulatory activity.  Therefore, the lack of GPLs may be very useful in distinguishing M. avium from ParaTB.  More importantly, if indeed the GPLs are lacking in ParaTB, this would represent a major difference between these subspecies and may account, at least in part, for the varied diseases caused by M. avium and ParaTB.  Our initial experiments characterized the genomic regions responsible for the synthesis of GPLs and we have been successful in mapping the region involved in the synthesis of the GPLs from various M. avium isolates.  The results of these experiments were recently published in Veterinary Microbiology.  Using this information we compared sequences, which were conserved in all M. avium strains tested, with the available ParaTB sequence available through TIGR.  None of the conserved sequences were found in the ParaTB genome.  We also used the available GPL sequence to design PCR primers to amplify genes within the GPL genomic cluster.  All M. avium strains (14 total) gave PCR products of the expected size while none of the 3 ParaTB strains tested gave PCR products.  These initial experiments indicate that GPLs are indeed lacking in ParaTB.  We have also initiated studies to evaluate the macrophage response to ParaTB infection and to compare this with the macrophage response to M. avium.  Our previous studies have shown that mitogen activated protein kinase (MAPK) activation in infected macrophages is required for its production of important immune effector molecules.  Further, we found the extent of MAPK activation within infected macrophages was inversely correlated with the virulence of the mycobacteria (Infection and Immunity, 70; 3040-52).  Therefore, we sought to compare the MAPK activation profile in macrophages infected with ParaTB or M. avium.  Interestingly, we observed minimal activation of the MAP kinases in macrophages infected with three different strains of ParaTB compared to 2 strains of M. avium.  Not surprisingly, we also observed minimal production of TNF-a and NOS2 by ParaTB infected macrophages.  This indicates that macrophages respond differently to M. avium and ParaTB infection and one of these differences is the activation of the MAPK signaling cascade.
IMPACT: 2001/10 TO 2002/09.  Our studies on Johne's disease has centered on defining characteristics specific to M. paratuberculosis, the causative agent of this disease, which can be used to develop diagnostic markers and to gain a better understanding of what makes this mycobacteria pathogenic.  Our data indicates that M. paratuberculosis lacks many of the genes required to produce a glycolipid (i.e. a lipid with sugars attached) which has been implicated in promoting a host immune response.  We believe that this may be an important aspect of its pathogenesis and perhaps useful in some diagnostic assays to distinguish M. avium from M. tuberculosis.
PUBLICATIONS: 2001/10 TO 2002/09
1. Roach, S.K. and Schorey, J.S. (2002) Differential regulation of p38 mitogen activated protein kinase phosphorylation in macrophages infected with Mycobacterium. Infection and Immunity. 70; 3040-3052.
2. Krzywinska, E. and Schorey, J.S. Characterization of genetic differences between the Mycobacterium avium subsp. avium strains of diverse virulence with a focus on the glycopeptidolipid biosynthesis cluster.  Veterinary Microbiology.  In Press
PROJECT CONTACT:
     Name: Schorey, J. S.  Phone: 219-631-3734  Fax: 219-631-7413
     E
mail: schorey.1@nd.edu
     

 

PROJ TYPE: USDA INHOUSE PROJ STATUS: TERMINATED
START: 01 OCT 1995 TERM: 30 SEP 2000 FY: 2000
INVESTIGATOR: Stabel J R; Bannantine J P; Vacant; Miller J M; Bolin C A
PERFORMING INSTITUTION:  National Animal Disease Ctr.  Ames, Iowa 50010
SUBJECT:  Diagnosis, pathogenesis, and immunology of paratuberculosis (Johne's disease) in cattle.
OBJECTIVES: Develop new/modify existing diagnostic procedures for detection of subclinical paratuberculosis (paratb) & Johne's infection; isolate/characterize heat shock proteins expressed during M. paratb infection; investigate genetic assoc. between resistance/susceptibility to M. paratb & disease state of animal; determine possible etiological role for M. paratb in Crohn’s's disease in humans & potential exposure through contaminated dairy products.  NEW: Identify/characterize specific gen. seqs. involved in virul [sic].
APPROACH: Current protocols for fecal culture of M. paratuberculosis and PCR/nucleic acid probe detection of M. paratuberculosis in feces and tissues will be modified for improved sensitivity of detection; SDS-PAGE, immunoblotting, radioimmunoprecipitation assays will be used to identify immunodominant heat shock proteins and their utility as antigens will be evaluated; correlation between expression of BoLA class II antigens and resistance/ susceptibility to M. paratuberculosis infection will be evaluated; using a small-scale pasteurizer, optimal time and temperature conditions for killing M. paratuberculosis in milk will be determined. IBC: NADC, Ames, IA NADC, Ames, IA, BDLRU: Bldg2,A12/A3: #0092 Aprvd & #0117 Exempt to 09/20/00 Bldg2,A17; Barn4G: #0238 Exempt to 08/22/00 Bldg2,A3: #0075 Exempt to 12/29/00 Bldg2,A17; Barn4G: #0237 Exempt to 04/25/00
PROGRESS: 2000/10 TO 2001/091.  What major problem or issue is being resolved and how are you resolving it? Paratuberculosis (Johne's disease) is a chronic, progressive enteric disease of ruminants caused by infection with Mycobacterium paratuberculosis.  Economic losses are estimated to be $200/infected cow/year and are the result of animal culling, reduced milk production, poor reproductive performance, and reduced carcass value.  Research to develop improved diagnostic tests for detection of this disease will provide tools for reducing contamination of the environment with M. paratuberculosis and the spread of infection in a herd.  Research on the pathogenesis and immunology of M. paratuberculosis infections of cattle is conducted to allow design of more rational diagnostic and control procedures.  Sequencing the genome of M. paratuberculosis will lead to identification of specific antigens for M. paratuberculosis and will result in better diagnostic tests to allow early detection of subclinically infected animals and reduce the incidence of disease in herds.  2. How serious is the problem?  Why does it matter?  Johne's disease has become a high priority disease in the cattle industry.  Herd prevalence of Johne's disease is estimated to be 22-40% as determined by a recent NAHMS survey of dairy cattle.  There are no adequate estimates of herd prevalence in beef cattle in the US.  The economic impact of this disease on the dairy industry was estimated to be over $200 million per year in 1996 and is growing each year with the continued spread of this disease.  In addition, M. paratuberculosis has been implicated as a causative factor in Crohn’s's disease, a chronic inflammatory bowel disease of human beings, which has served as a further impetus to control this disease in our national cattle industry.  The dairy industry must be assured that they are providing a clean, safe product for consumers.  3. How does it relate to the National Program(s) and National Component(s)?  The Johne's disease research project is assigned to the Animal Health National Program (103) and encompasses measures to ensure animal health through the control and management of the disease, improved detection methods as well as treatment and prevention.  The project has objectives of: 1) developing rapid and sensitive diagnostic tests by understanding the host immune response which contributes to the National Program components of Pathogen detection and Host/Pathogen Interactions, 2) sequencing the genome of M. paratuberculosis which contributes to the National Program component of Microbial Genomics, 3) developing a DNA vaccine for Johne's disease which contributes to the National Program component of Disease Control Strategies.  4. What were the most significant accomplishments this past year? A. Single Most Significant Accomplishment during FY 2001:  This project has been replaced by the temporary bridging project 3625-32000-046-00D and therefore the accomplishments listed are identical those listed in 3625-32000-046-00D.  Sequencing of M. paratuberculosis was initiated to provide comparative information about this species compared to other closely related mycobacteria.  Sequencing of the M. paratuberculosis genome has almost been completed (98%) in our laboratory in collaboration with researchers at the University of Minnesota. Currently, the project is in the gap- closure phase and annotation of large contigs.  These sequencing data will identify unique genes that may be used for development of more sensitive and specific diagnostic tools.  B.Other Significant Accomplishments: A Trust Fund Cooperative agreement was entered into with Infigen to evaluate the fecal PCR technique developed by our laboratory.  Evaluation of the test is currently underway in our laboratory and the Colorado Department of Agriculture to determine sensitivity, specificity and reproducibility of the assay on 1000 characterized fecal samples.  This test is simple, rapid and relatively inexpensive and will simplify management of Johne's disease in the US.  The gamma-interferon test has been optimized in our laboratory for detection of animals in the early stages of infection.  In collaboration with researchers at Iowa State University, we have compared efficacy of the gamma-interferon test with other diagnostic tools for Johne's disease in neonatal calves born to infected and non-infected dams.  This test will be helpful in identification of subclinically infected animals and control the spread of infection within a herd.  Work was initiated to identify specific immunogens of M. paratuberculosis by random expression library immunization.  A M. paratuberculosis genomic DNA library was partitioned into pools of clones and used to immunize mice.  Mice were challenged with the live organism and then necropsied for tissue colonization.  Preliminary results suggest that 5 sublibraries thus far may be protective against M. paratuberculosis challenge.  These protective libraries may be useful in development of a DNA vaccine for M. paratuberculosis infection.  C. Significant Accomplishments/Activities that Support Special Target Populations: A study to evaluate efficacy of on-farm pasteurization of waste milk contaminated with M. paratuberculosis to feed to neonatal calves was initiated.  This work was performed at a local dairy herd with 20% infection with M. paratuberculosis.  This work demonstrated that using a batch pasteurizer unit at 65.5 C for 30 minutes was effective at destroying M. paratuberculosis in milk.  Producers may implement this management tool to allay the spread of Johne's disease to neonatal calves.  A 3-year study of an infected dairy herd in Pennsylvannia is in the final stages.  This project is in collaboration with researchers at the University of Pennsylvannia [sic] and the University of Minnesota.  Samples were obtained quarterly from cows/heifers/calves within the herd for surveillance of the herd for Johne's disease using a variety of diagnostic tools.  Compilation of these data will occur this fall.  Thus far this work has shown that calving in winter exacerbates the degree of infection within the herd compared to spring calving.  The management tools identified from this study will be helpful to control the spread of Johne's disease within a herd or between herds.  A two-year study to determine the effectiveness of US pasteurization standards on destruction of M. paratuberculosis in milk was initiated.  This project was designed to encompass all types of milk processing procedures, including milk for cheese and ice cream.  This work is performed in collaboration with the Moffett Center and University of Wisconsin.  Results from this study will be extrapolated to further evaluation with a pilot-scale pasteurizer unit at the Moffett Center.  This information is essential for consumer confidence in the effectiveness of current pasteurization in the US to kill suspected human pathogens. D. Progress Report:  The sequencing of the M. paratuberculosis genome is almost completed and is in the gap-closure phase.  The efficacy of the gamma-interferon test for detection of subclinical infection in young calves and in cows with latent disease has been demonstrated.  On-farm batch pasteurization of waste milk is effective in destruction of M. paratuberculosis and can be considered safe for neonatal calves.  A fecal PCR test for M. paratuberculosis is being evaluated for sensitivity and specificity.  Unique genes for M. paratuberculosis have been identified and are being evaluated as potential diagnostic tools.  Expression of two unique genes of M. paratuberculosis has been tested in an in vitro macrophage infection model.  5. Describe the major accomplishments over the life of the project including their predicted or actual impact.  Significant progress has been made in the development and/or optimization of new diagnostic tools for the detection of Johne's disease.  Fecal culture methodology has been improved and diagnostic laboratories throughout the US are using this technique.  Optimization of the gamma- interferon test for detection of subclinically infected animals has been achieved through incorporation of our antigen preparations in the test, allowing for detection of infected animals less than 6 months of age.  The ability to accurately identify animals in the early stages of disease is a critical control point.  Development of the fecal PCR test may yield more timely and sensitive detection of infected animals that are shedding the bacteria in their feces.  Little information is available on host immune responses to M. paratuberculosis infection in cattle and other species of ruminants.  Host immune responses in the subclinical and clinical stages of disease have been evaluated using cattle, bison and a mouse model.  Our work has shown that secretion of proteins (cytokines) by immune cells and activation of immune cells is affected by the different stages of infection.  This information is helpful in developing diagnostic tools for Johne's disease as well as treatment strategies.  M. paratuberculosis has been implicated as a causative factor in Crohn’s's disease, an inflammatory bowel disease, in humans.  A proposed method of infection is via contaminated dairy products from cows with Johne's disease.  Experiments were conducted to evaluate current pasteurization standards set by the dairy industry on the destruction of M. paratuberculosis in raw milk using state-of-the-art technology.  Our work has demonstrated that continuous flow pasteurization of milk effectively destroys M. paratuberculosis.  This work is critical in assuring a safe, clean product for US consumers. Improvement of diagnostic tools and development of vaccines is dependent upon the identification of specific antigens for M. paratuberculosis.  A genomic library for M. paratuberculosis was screened and several clones specific to M. paratuberculosis were recovered.  One clone, HspX, has been characterized in our laboratory and has been patented.  Genes from 10 additional clones have been expressed during the past year and are being evaluated in diagnostic tests.  Further characterization of additional clones and expression of proteins/peptides from them will aid in the development of more sensitive diagnostic tests.  6. What do you expect to accomplish, year by year, over the next 3 years?  This is the final annual report for this project.  Expected future accomplishments are in temporary bridging project 3625-32000-046-00D.  7. What science and/or technologies have been transferred and to whom?  When is the science and/or technology likely to become available to the end user (industry, farmer, other scientists)?  What are the constraints if known, to the adoption & durability of the technology product? The fecal PCR technique has been transferred by a material transfer agreement to a commercial company.  A trust fund cooperative agreement and patent for this technique are currently in process.  Commercial availability of this technique should occur within 1-2 years.  Polyclonal antibodies to preparations of M. paratuberculosis developed in our laboratory have been transferred to several companies (CRADAs or MTAs) in collaborative efforts to develop new diagnostic tools for Johne's disease.  Commercial availability of the new diagnostic tools is dependent upon the companies involved and successful use of these tools.  Invitations to speak about effects of pasteurization on destruction of M. paratuberculosis have resulted in the transfer of this information to the dairy industry and producers.  Invitations to give talks about current research in Johne's disease, including development of diagnostic tools have resulted due to high interest of the cattle industry.  Constraints in utilization of technology for new diagnostic tools are dependent upon the unique genetic and physical characteristics of the bacteria.  Also, problematic is the host immune response to infection with M. paratuberculosis which is exacerbated by the lack of knowledge of the immunology and pathogenesis of this disease.  8. List your most important publications in the popular press (no abstracts) and presentations to non-scientific organizations and articles written about your work (NOTE: this does not replace your peer-reviewed publications which are listed below) May 2001-Dairy Today May 2001-Interviewed by Phillip Brasher of the Associated Press, Washington, DC. May 2001-Inteviewed by Lance Gay, Scripps. May 2001-Hoard's Dairyman June 2001-Dairy Herd Management June 2001-Angus Journal AVMA-September, 2001, Schaumburg, IL-Presentation of current diagnostic tests for Johne's disease and related research to American Veterinary Medical Assoc.
PUBLICATIONS: 2000/10 TO 2001/09
1. Bannantine, J.P., Stabel J.R. HspX is present within Mycobacterium paratuberculosis-infected macrophage and is recognized by sera from some infected cattle.  Veterinary Microbiology. 2000. v. 76. p. 434-358.
2. Stabel, J.R. Transitions in immune responses to Mycobacterium paratuberculosis. Veterinary Microbiology. 2000. v. 77. p. 465-473.
3. Mwangi, S.M., Stabel, J., Lee, E., Kehrli, M.E. Taylor, M.J., Expression and characterization of a recombinant soluble form of bovine tumor necrosis factor receptor type I. Veterinary Immunology and Immunopathology. 2000. v. 77. p. 233-241.

 

PROJ TYPE: USDA INHOUSE PROJ STATUS: TERMINATED
START: 24 JAN 2001 TERM: 30 SEP 2001 FY: 2001
INVESTIGATOR: STABEL J R
PERFORMING INSTITUTION: National Animal Disease Ctr.  Ames, Iowa 50010
SUBJECT:  Evaluation of sensitivity and specificity of a new fecal PCR test for M. paratuberculosis.
OBJECTIVES: To estimate the sensitivity and specificity of a newly developed fecal PCR assay for M. paratuberculosis.
APPROACH: Approximately 1,500 fecal samples will be collected from dairy herds across the state of Colorado.  These herds will be test positive for Johne's disease, with low prevalence rates in each herd.  A subset of samples (20% or greater) will be obtained from known Johne's-free herds.  Samples will be processed for fecal culture by the Colorado Department of Agriculture using the double decontamination/centrifugation procedure developed by the NADC.  Fecal samples will also be processed for DNA extraction and PCR analysis for M. paratuberculosis DNA using a method developed by the NADC.  A subset of samples (250) will be shipped to the NADC for DNA extraction/PCR analysis to evaluate the reproducibility of the technique between laboratories.  Infigen will also perform the technique on a subset of samples to further evaluate reproducibility.
PROGRESS: 2000/10 TO 2001/09.  1. What major problem or issue is being resolved and how are you resolving it?  Paratuberculosis (Johne's disease) is a chronic, progressive enteric disease of ruminants caused by infection with Mycobacterium paratuberculosis.  Economic losses are estimated to be $200/infected cow/year and are the result of animal culling, reduced milk production, poor reproductive performance, and reduced carcass value.  Research on improved diagnostic tests for detection of this disease will provide tools for reducing contamination of the environment with M. paratuberculosis and the spread of infection within a herd.  Data accrued from this collaborative agreement with Infigen, ARS, and Colorado Department of Agriculture will determine the efficacy of a new fecal PCR test for M. paratuberculosis.  Better diagnostic tests to allow early detection of subclinically infected animals will reduce the incidence of disease in herds.  2. How serious is the problem?  Why does it matter?  Johne's disease has become a high priority disease for the cattle industry.  Herd prevalence of Johne's disease is estimated to be 22-40% as determined by the recent NAHMS survey of dairy cattle.  The economic impact of this disease on the dairy industry alone is estimated to be over $200 million per year based upon figures generated in 1996 and is growing each year with the continued spread of this disease.  More sensitive diagnostic tools must be developed in order to implement a successful control program for Johne's disease in the US. 3.  How does it relate to the National Program(s) and National Component(s)?  This collaborative research effort between ARS, Infigen and the Colorado Department of Agriculture falls under the Animal Health National Program and is consistent with the needs of the cattle industry for improved diagnostic techniques and control measures for Johne's disease in cattle.  This collaborative research effort has the objective of evaluating the efficacy of a new fecal PCR test for the detection of M. paratuberculosis.  This objective contributes to the National Program Component on Pathogen Detection. 4. What were the most significant accomplishments this past year?  D. Progress Report: This report serves to document research conducted under a CRADA between ARS and Infigen with subcontract agreement with Colorado Department of Agriculture.  Additional details of research can be found in the report for the parent project 3625-32000-046-00D Understanding Host-Pathogen Interactions for the Diagnosis and Control of Johne's Disease (Paratuberculosis).  The fecal PCR test was optimized in our laboratory and the technology transferred to Infigen for evaluation.  Infigen, ARS and Colorado Department of Agriculture entered into an agreement to evaluate 1000 characterized fecal samples from cows with Johne's disease or noninfected clean animals.  At the Colorado laboratory, the fecal samples were cultured for M. paratuberculosis by the NADC method and the fecal PCR procedure was performed.  A subset of 250 samples was shipped to the NADC to evaluate reproducibility of the fecal PCR test between labs.  Results will be reported after data have been analyzed. T his work is valuable to the livestock industry as an improved measure of control of Johne's disease.  5. Describe the major accomplishments over the life of the project including their predicted or actual impact.  Many states are implementing voluntary control programs for Johne's disease in cattle and a nationwide control program has been suggested.  The NADC has developed a simple, rapid technique for detection of M. paratuberculosis in feces using PCR.  If this assay proves to be sensitive, specific and reproducible, the technology will be transferred to the public sector.  Currently, a commercial company is interested in marketing the assay if it proves to be effective at identifying infected animals.  This information will have a major impact on the selection of diagnostic tools for culling infected animals from a herd.  Early detection of disease will allay the spread throughout the herd and reduce subsequent economic losses due to reduced production, reproductive problems, and culling costs.  6. What do you expect to accomplish, year by year, over the next 3 years? 2002 - Final compilation of data and submission of a report to the press and peer-reviewed journal.  7.  What science and/or technologies have been transferred and to whom?  When is the science and/or technology likely to become available to the end user (industry, farmer, other scientists)?  What are the constraints if known, to the adoption & durability of the technology product?  This technology has been transferred by a material transfer agreement to Infigen. Constraints to any technology transfer include the publication of results pending final data and patent approval.  8. List your most important publications in the popular press (no abstracts) and presentations to non-scientific organizations and articles written about your work (NOTE: this does not replace your peer-reviewed publications which are listed below) June 2001-Angus Journal June 2001-Dairy Herd Management.
PUBLICATIONS: 2000/10 TO 2001/09
No publications reported this period.

 

PROJ TYPE: USDA INHOUSE PROJ STATUS: TERMINATED
START: 01 OCT 2000 TERM: 06 NOV 2001 FY: 2001
INVESTIGATOR: Stabel J R; Vacant; Bannantine J P; Miller J M; Vacant
PERFORMING INSTITUTION: National Animal Disease Ctr.  Ames, Iowa 50010
SUBJECT:  Diagnosis, pathogenesis, and immunology of paratuberculosis (Johne's disease) in cattle.
OBJECTIVES: Develop new/modify existing diagnostic procedures for detection of subclinical paratuberculosis (paratb) & Johne's infection; isolate/characterize heat shock proteins expressed during M. paratb infection; investigate genetic assoc. between resistance/susecptibility to M. paratb & disease state of animal; determine possible etiological role for M. paratb in Crohn’s's disease in humans & potential exposure through contaminated dairy products.  NEW: Identify/characterize specific gen. seqs. involved in virul.
APPROACH: Current protocols for fecal culture of M. paratuberculosis and PCR/nucleic acid probe detection of M. paratuberculosis in feces and tissues will be modified for improved sensitivity of detection; SDS -PAGE, immunoblotting, radioimmunoprecipitation assays will be used to identify immunodominant heat shock proteins and their utility as antigens will be evaluated; correlation between expression of BoLA class II antigens and resistance/ susceptibility to M. paratuberculosis infection will be evaluated; using a small-scale pasteurizer, optimal time and temperature conditions for killing M. paratuberculosis in milk will be determined. IBC: NADC, Ames, IA NADC, Ames, IA BDLRU: Bldg2,A12/A3: #0092 Aprvd & #0017 Exempt to 09/20/00 Bldg2,A17; Barn4G: #0238 Exempt to 08/22/00 Bldg2,A3: #0075 Exempt to 12/29/00 Bldg2,A17; Barn4G: #0237 Exempt to 04/25/00 PROGRESS: 2000/10 TO 2001/111. What major problem or issue is being resolved and how are you resolving it?  Paratuberculosis (Johne's disease) is a chronic, progressive enteric disease of ruminants caused by infection with Mycobacterium paratuberculosis.  Economic losses are estimated to be $200/infected cow/year and are the result of animal culling, reduced milk production, poor reproductive performance, and reduced carcass value.  Research in improved diagnostic tests for detection of this disease will provide tools for reducing contamination of the environment with M. paratuberculosis and the spread of infection in a herd.  Research on the pathogenesis and immunology of M. paratuberculosis infections of cattle is conducted to allow design of more rational diagnostic and control procedures.  Sequencing the genome of M. paratuberculosis will lead to identification of specific antigens for M. paratuberculosis and will result in better diagnostic tests to allow early detection of subclinically infected animals and reduce the incidence of disease in herds.  2. How serious is the problem?  Why does it matter?  Johne's disease has become a high priority disease in the cattle industry.  Herd prevalence of Johne's disease is estimated to be 22-40% as determined by a recent NAHMS survey of dairy cattle.  There are no adequate estimates of herd prevalence in beef cattle in the U.S.  The economic impact of this disease on the dairy industry was estimated to be over $200 million per year in 1996 and is growing each year with the continued spread of this disease.  In addition, M. paratuberculosis has been implicated as a causative factor in Crohn’s's disease, a chronic inflammatory bowel disease of human beings, which has served as a further impetus to control this disease in our national cattle industry.  The dairy industry must be assured that they are providing a clean, safe product for consumers.  3. How does it relate to the national Program(s) and National Program Component(s) to which it has been assigned?  The Johne's disease research project is assigned to the Animal Health National Program 103 (100%) and encompasses measures to ensure animal health through the control and management of the disease, improved detection methods, as well as treatment and prevention.  The project has objectives of: 1) developing rapid and sensitive diagnostic tests by understanding the host immune response which contributes to the National Program components of Pathogen Detection and Host/Pathogen Interactions; 2) sequencing the genome of M. paratuberculosis which contributes to the National Program component of Microbial Genomics; and 3) developing a DNA vaccine for Johne's disease which contributes to the National Program component of Disease Control Strategies.  4. What was your most significant accomplishment this past year?  A. Single Most Significant Accomplishment during FY 2002: Sequencing of M. paratuberculosis was initiated to provide comparative information about this species compared to other closely related mycobacteria.  Sequencing of the M. paratuberculosis genome has almost been completed (98%) in our laboratory at the National Animal Disease Center (NADC) in collaboration with researchers at the University of Minnesota. Currently, the project is in the gap-closure phase and annotation of large contigs.  These sequencing data will identify unique genes that may be used for development of more sensitive and specific diagnostic tools.  B. Other Significant Accomplishment(s), if any: A trust agreement was entered into with Infigen to evaluate the fecal PCR technique developed by our laboratory.  Evaluation of the test has been completed in collaboration with NADC and the Colorado Department of Agriculture to determine sensitivity, specificity, and reproducibility of the assay on 1,000 characterized fecal samples.  During FY 2002, we determined that the overall sensitivity of detection was 53%.  This test is simple, rapid, and relatively inexpensive and will simplify management of Johne's disease in the U.S.  Improved diagnostic tests are needed to detect M. paratuberculosis-infected cattle in the subclinical stages of disease.  The gamma- interferon test was optimized by ARS scientists at the NADC for detection of animals in the early stages of infection.  In collaboration with researchers at Iowa State University, we compared the efficacy of the gamma-interferon test with other diagnostic tools for Johne's disease in neonatal calves born to infected and non-infected dams.  This test will be helpful in identification of subclinically infected animals and control the spread of infection within a herd.  Cows with clinical Johne's disease often break shortly after calving, a time of extreme stress for the cow and immunosuppression.  A periparturient immunosuppression study to evaluate the effects of supplemental energy on host immunity in cows infected with M. paratuberculosis was completed in a Johne's disease cow model.  During FY 2002, data were collected and are currently being analyzed.  Information from this study will be helpful in determining whether periparturient immunosuppression can be alleviated in Johne's cows with dietary modifications around calving.  C. Significant Activities that Support Special Target Populations: none.  5. Describe your major accomplishments over the life of the project, including their predicted or actual impact?  Significant progress has been made in the development and/or optimization of new diagnostic tools for the detection of Johne's disease.  Fecal culture methodology has been improved and diagnostic laboratories throughout the U.S. are using this technique.  Optimization of the gamma- interferon test for detection of subclinically infected animals has been achieved through incorporation of our antigen preparations in the test, allowing for detection of infected animals less than 6 months of age.  The ability to accurately identify animals in the early stages of disease is a critical control point.  Development of the fecal PCR test may yield more timely and sensitive detection of infected animals that are shedding the bacteria in their feces.  Little information is available on host immune responses to M. paratuberculosis infection in cattle and other species of ruminants.  Host immune responses in the subclinical and clinical stages of disease have been evaluated using cattle, bison, and a mouse model.  Our work has shown that secretion of proteins (cytokines) by immune cells and activation of immune cells is affected by the different stages of infection.  This information is helpful in developing diagnostic tools for Johne's disease, as well as treatment strategies.  M. paratuberculosis has been implicated as a causative factor in Crohn’s's disease, an inflammatory bowel disease, in humans.  A proposed method of infection is via contaminated dairy products from cows with Johne's disease.  Experiments were conducted to evaluate current pasteurization standards set by the dairy industry on the destruction of M. paratuberculosis in raw milk using state-of-the-art technology.  Our work has demonstrated that continuous flow pasteurization of milk effectively destroys M. paratuberculosis.  This work is critical in assuring a safe, clean product for U.S. consumers.  Improvement of diagnostic tools and development of vaccines is dependent upon the identification of specific antigens for M. paratuberculosis.  A genomic library for M. paratuberculosis was screened and several clones specific to M. paratuberculosis were recovered.  One clone, HspX, has been characterized in our laboratory and has been patented.  Ten additional clones have been cloned and expressed during the past year and are being evaluated in diagnostic tests.  Further characterization of additional clones and expression of proteins/peptides from them will aid in the development of more sensitive diagnostic tests.  6. What do you expect to accomplish, year by year, over the next 3 years?  This is the final report for this project, which has been replaced by 3625-32000-062-00D.  Expected future accomplishments are listed in 3625- 32000-062-00D. 7. What technologies have been transferred and to whom?  When is the technology likely to become available to the end user (industry, farmer other scientist)?  What are the constraints, if known, to the adoption durability of the technology?  The fecal PCR technique has been transferred by a material transfer agreement (MTA) to a commercial company.  A trust agreement and patent for this technique are currently in process.  Commercial availability of this technique should occur within 1-2 years.  Polyclonal antibodies to preparations of M. paratuberculosis developed in our laboratory have been transferred to several companies (Cooperative Research and Development Agreements or MTAs) in collaborative efforts to develop new diagnostic tools for Johne's disease.  Commercial availability of the new diagnostic tools is dependent upon the companies involved and successful use of these tools.  Invitations to speak about effects of pasteurization on destruction of M. paratuberculosis have resulted in the transfer of this information to the dairy industry and producers. Invitations to give talks about current research in Johne's disease, including development of diagnostic tools have resulted due to high interest of the cattle industry.  Constraints in utilization of technology for new diagnostic tools is dependent upon the unique genetic and physical characteristics of the bacteria.  Also, problematic is the host immune response to infection with M. paratuberculosis which is exacerbated by the lack of knowledge of the immunology and pathogenesis of this disease.  8. List your most important publications and presentations, and articles written about your work (NOTE: this does not replace your review publications which are listed below) October 2001, Dairy Herd Management. October 2001, Dairy Herd Management - Kimberlee Schoonmaker. September 2001, AVMA, Schaumburg, IL - Presentation of current diagnostic tests for Johne's disease and related research to American Veterinary Medical Association.
PUBLICATIONS: 2000/10 TO 2001/11
1. Bannantine, J.P., Baechler, E., Zhang, Q., Li, L., Kapur, V. Genome scale comparison of Mycobacterium avium subspecies paratuberculosis with Mycobacterium avium subspecies avium reveals potential diagnostic sequences. Journal of Clinical Microbiology. 2002. v. 40. p. 1303-1310.
2. Stabel, J.R., Wells, S.J., Wagner, B.A. Relationships between fecal culture, ELISA, and bulk tank milk test results for Johne's disease in US dairy herds. Journal of Dairy Science. 2002. v. 85. p. 525-531.

 

PROJ TYPE: USDA INHOUSE PROJ STATUS: NEW
START: 07 NOV 2001 TERM: 06 NOV 2006 FY: 2005
INVESTIGATOR: Stabel J R; Bannantine J P; Robbe Austerman S; Paustian M; Peterson Burch B D; Whipple D L
PERFORMING INSTITUTION:  Agricultural Research Service.  Ames, Iowa 50010
SUBJECT:  Understanding host-pathogen interactions for the diagnosis & control of paratuberculosis (Johne's).
OBJECTIVES: Sequence the complete M. paratuberculosis (M. ptb) genome.  Use functional genomic approaches to identify and characterize unique bacterial genes and proteins that can be used to develop highly sensitive and specific diagnostic tests and vaccines for use in cattle and sheep. Characterize host immune responses during the different stages of disease.  Determine shedding of M. ptb in milk of naturally infected cows and evaluate survival of M. ptb in milk after heat treatment.  Identify immunogens of M. ptb by random and directed expression library immunization. APPROACH: Unique genes identified by sequencing the genome of M. paratuberculosis will be evaluated as reagents and vaccine candidates.  Studies will be conducted to evaluate therapies to alleviate periparturient immunosuppression in cows with Johne's disease.  Temporal evaluation of current diagnostic tools in an infected herd will be performed for 3 years.  Milk from naturally infected cows will be cultured to determine time of shedding.  Heat treatment studies will be conducted with a laboratory scale pasteurizer and a slug-flow pasteurizer to evaluate current pasteurization standards for milk, cheese and ice cream.  Unique genes identified by sequencing the genome of M. paratuberculosis will be evaluated as reagents and vaccine candidates.  Studies will be conducted to evaluate therapies to alleviate periparturient immunosuppression in cows with Johne's Disease.  Temporal evaluation of current diagnostic tools in an infected herd will be performed for 3 years.  Milk from naturally infected cows will be cultured to determine time of shedding.  Heat treatment studies will be conducted with a laboratory scale pasteurizer and a slug-flow pasteurizer to evaluate current pasteurization standards for milk, cheese and ice cream. BSL-2; Approved 1/04/2005 (IBC-#0092). BSL-Exempt 10/07/2004(IBC- #0238). BSL-Exempt (IBC-#0117) canceled 10/7/04.
PROGRESS: 2003/10 TO 2004/09  1. What major problem or issue is being resolved and how are you resolving it (summarize project aims and objectives)?  How serious is the problem?  What does it matter?  Disease of ruminants caused by infection with Mycobacterium avium subsp. paratuberculosis.  Economic losses are estimated to be $200/infected cow/year and are the result of animal culling, reduced milk production, poor reproductive performance, and reduced carcass value.  Johne's disease has become a high priority disease in the cattle industry.  Herd prevalence of Johne's disease is estimated to be 22-40% as determined by a recent National Animal Health Monitoring Survey of dairy cattle.  There are no adequate estimates of herd prevalence in beef cattle in the U.S.  The economic impact of this disease on the dairy industry was estimated to be over $200 million per year in 1996 and is growing each year with the continued spread of this disease.  In addition, M. paratuberculosis has been implicated as a causative factor in Crohn’s's disease, a chronic inflammatory bowel disease of human beings, which has served as a further impetus to control this disease in our national cattle industry.  The dairy industry must be assured that they are providing a clean, safe product for consumers.  Research in improved diagnostic tests for detection of this disease will provide tools for reducing contamination of the environment with M. paratuberculosis and the spread of infection in a herd.  Research on the pathogenesis and immunology of M. paratuberculosis infections of cattle is conducted to allow design of more rational diagnostic and control procedures.  Annotation of the genome sequence of M. paratuberculosis will lead to identification of specific antigens for M. paratuberculosis and characterization of these antigens will result in better diagnostic tests to allow early detection of subclinically infected animals and reduce the incidence of disease in herds.  2. List the milestones (indicators of progress) from your Project Plan.  Year 1 (FY2001): Finish genome sequencing of M. paratuberculosis.  Begin identification of M. paratuberculosis-specific clones by comparison of sequence with M. avium sequence.  Perform pathogenesis/immunity studies with beef cattle and bison calves infected with different isolates of M. paratuberculosis.  Rumen fistulate and artificially inseminate M. paratuberculosis-infected cows for studies on immunity during the periparturient period, which is the time around calving.  Identify genes that are protective against challenge with live M. paratuberculosis in the mouse model.  Develop immuno-PCR technique and improve sensitivity of the enzyme linked immunosorbent assay (ELISA) test for detection of antibody to M. paratuberculosis.  Perform heat inactivation studies with M. paratuberculosis in milk using the slug-flow system, an [sic] high-temperature short-time (HTST) laboratory- scale pasteurizer unit, and a pilot-scale pasteurizer unit.  Year 2 (FY2002): Fill in gaps of M. paratuberculosis genome sequence and use M. avium sequence to compare.  Determine expression of M. paratuberculosis-specific proteins in vitro experiments using macrophage cell lines infected with M. paratuberculosis.  Complete host immunity study/calf infection model study in beef cattle and bison calves.  Collect data on Pennsylvannia [sic] herd study to evaluate diagnostic test efficacy in herd management of disease.  Continue work to identify protective gene sequences in a DNA immunization format in a mouse model.  Complete work on laboratory-scale pasteurization using milk artificially inoculated with M. paratuberculosis.  Year 3 (FY2003): Identify M. paratuberculosis specific genes (annotation) from sequencing data.  Evaluate genes as potential antigens for use in diagnostic tests by testing in ELISA and IFN-g assays.  Perform in vitro infection studies and screen for expression of M. paratuberculosis specific genes.  Determine mechanism of shift in host immunity during different stages of disease by studying cytokine expression.  Analyze data from Pennsylvannia [sic] herd study and evaluate efficacy of diagnostic tools in identifying subclinically infected animals.  Perform host immunity studies during the periparturient period with Johne's cows by evaluating various immune function tests and correlating these with infection of cows.  Effects of dietary energy will be studied.  Extrapolate and apply results from experiments on pasteurization of milk inoculated with M. paratuberculosis using laboratory-scale unit to a pilot-scale pasteurizer unit.  This will be done in collaboration with other researchers.  Year 4 (FY2004): Complete annotation of the genome and determine function of specific proteins/peptides from the sequencing effort.  Evaluate genes as potential antigens for use in diagnostic tests by testing in ELISA and interferon gamma (IFNg) assays.  Continue identification of protective gene pools from M. paratuberculosis using a mouse challenge model.  Protective gene sequences, resulting in reduced colonization of tissues, will be identified and aligned with known sequence from other mycobacteria, including M. avium.  Continue experiments to determine host immune responses upon vaccination with gene sequences that are protective using mouse model.  Complete studies on the efficacy of destruction of M. paratuberculosis in colostrum using a commercial on-farm pasteurization unit.  Continue experiments evaluating host immunity to M. paratuberculosis infection during subclinical and clinical stages of disease.  Specifically, immune cell function and cytokine expression during the two phases of disease will be determined.  Year 5 (FY2005): Determine expression of M. paratuberculosis-specific proteins in vitro using macrophage cell lines infected with M. paratuberculosis.  Function of these proteins will be assessed as part of the microbial defense system.  Analyze effects of environmental stressors such as iron levels and pH on gene expression using M. paratuberculosis gene microarrays.  Evaluate protective genes (gene pools) identified in the mouse model in a calf infection model as potential vaccine candidates.  Use of specific gene sequences (alone or pooled) as vaccine candidates will be determined in challenge experiments.  Continue studies on periparturient immune function in M. paratuberculosis-infected dairy cows.  Diets of experimental animals will be manipulated to reduce immunosuppression during the periparturient period and correlated with fecal and milk shedding of M. paratuberculosis.  3.  Milestones: A: List the milestones (from the list in Question 2) that were scheduled to be addressed in FY 2004.  How many milestones did you fully or substantially meet in FY 2004 and indicate which ones were not fully or substantially met, briefly explain why not, and your plans to do so.  Year 4 (FY2004): Complete annotation of the genome and determine function of specific proteins/peptides from the sequencing effort.  Evaluate genes as potential antigens for use in diagnostic tests by testing in ELISA and interferon gamma (IFNg) assays.  Continue identification of protective gene pools from M. paratuberculosis using a mouse challenge model.  Protective gene sequences, resulting in reduced colonization of tissues, will be identified and aligned with known sequence from other mycobacteria, including M. avium.  Continue experiments to determine host immune responses upon vaccination with gene sequences that are protective using mouse model.  Complete studies on the efficacy of destruction of M. paratuberculosis in colostrum using a commercial on-farm pasteurization unit.  Continue experiments evaluating host immunity to M. paratuberculosis infection during subclinical and clinical stages of disease.  Specifically, immune cell function and cytokine expression during the two phases of disease will be determined.  The genome sequence of M. paratuberculosis was completely annotated and this information has been submitted to GenBank.  Characterization of function of specific proteins is underway.  Some of the unique sequences of M. paratuberculosis have known functions as determined by BLAST analysis of closely related mycobacteria but others need further study.  Microarrays of M. paratuberculosis genes have been generated and utilized in experiments to compare genome content of M. paratuberculosis and other closely related mycobacteria with the finding that M. paratuberculosis isolates were similar to one another and M. avium and M. silvaticum are divergent.  Additional information on protective gene pools was obtained using a random array of M. paratuberculosis clones in a mouse DNA vaccine model.  Further experiments are necessary to more accurately define clones that are protective within a pool.  Pasteurization experiments with colostrum and waste milk were completed using a commercial on-farm pasteurizer unit and showed that HTST pasteurization is successful in inactivating M. paratuberculosis.  Studies to evaluate the host immunity to M. paratuberculosis infection delineated distinct cytokine expression patterns in subclinically and clinically infected cattle as compared to healthy controls.  Culture methods for detection of M. paratuberculosis in sheep have been optimized using a liquid medium system.  This is a new initiative for the CRIS project.  Further work is necessary to determine optimal diagnostic tests for the detection of subclinical infection in both sheep and cattle.  B: List the milestones (from the list in Question 2) that you expect to address over the next 3 years (FY 2005, 2006 & 2007).  What do you expect to accomplish, year by year, over the next 3 years under each milestone?  In FY 2005, Expression of M. paratuberculosis-specific proteins will be determined by in vitro experiments using macrophage cell lines infected with M. paratuberculosis.  Function of these proteins as part of the microbial defense system will be assessed.  Effects of environmental stressors such as iron levels and pH on gene expression will be assessed using M. paratuberculosis gene microarrays.  Protective gene sequences characterized and identified using the mouse challenge model will be evaluated in a calf infection model.  Use of specific gene sequences (alone or pooled) as vaccine candidates will be determined in challenge experiments.  Host immunity of dairy cows during the periparturient period will be assessed by evaluating various immune function tests and correlating these results with the level of infection of cows with M. paratuberculosis.  Diets of experimental animals will be manipulated to reduce immunosuppression during the periparturient period and correlated with fecal and milk shedding of M. paratuberculosis.  Diagnostic tools for detection of M. paratuberculosis in sheep will be developed or optimized from previous research, particularly, tools that can detect early infection.  Methods to distinguish sheep and cattle strains in the field will be developed.  In FY 2006, Gene pools that have successfully protected calves against infection with M. paratuberculosis will be further evaluated in combination with adjunctive cytokine gene therapy to further reduce the incidence of infection in cattle.  New diagnostic tests for cattle and sheep will be developed using proteins/peptides identified by genomic sequencing of M. paratuberculosis.  Field studies to evaluate methods to distinguish cattle and sheep strains of M. paratuberculosis will be initiated.  M. paratuberculosis proteins will be identified for use as immunogens in cell-mediated immune assays such as the skin test and INFg test for detection of infection in cattle and sheep.  Testing of specific antigens will also be conducted using the mouse challenge model.  Therapeutic regimes to reduce the severity of periparturient immunosuppression in cows infected with M. paratuberculosis will be evaluated based upon our earlier work.  In FY 2007, Proteomic work using the mass spectrometer will be conducted on laboratory and wild type (field) strains of M. paratuberculosis.  This work will be beneficial in identifying M. paratuberculosis proteins that are expressed in cows and sheep in different stages of disease.  Further work on identification of early infection in cattle and sheep will be performed using novel antigens identified by the genome sequence project.  In vitro infection studies with macrophage cell lines and M. paratuberculosis microarrays will be performed to obtain information on how M. paratuberculosis can survive within the host macrophage during infection.  T and B cell activation markers will be studied in infected and healthy cattle to identify host immunologic responses during infection with M. paratuberculosis and what changes occur after infection and during the progression from subclinical to clinical disease.  4. What were the most significant accomplishments this past year? A. Single Most Significant Accomplishment during FY 2004.  Annotation of the M. paratuberculosis genome sequence was completed.  The sequence will be used to identify specific genes and their function.  This was a collaborative effort between the NADC and the University of Minnesota.  At least 30 novel gene sequences have been identified and expressed for experimental use and are being evaluated for use as diagnostic tools in the ELISA, IFN-g, and PCR assays.  More sensitive and specific diagnostic tools will improve management and control of paratuberculosis in the field.  B. Other Significant Accomplishments.  Further work on cytokine expression during subclinical and clinical stages of disease demonstrated singular and synergistic effects of cytokines, IFN-g, IL-10, and TGF-b, on immune cells from subclinically and clinically infected cows.  Addition of IL-10 and TGF-b to immune cells from cows resulted in decreased killing of M. paratuberculosis by macrophages and decreased secretion of IFN-g by cells.  Since IL-10 and TGF-b are upregulated in the clinical stages of infection it is likely that the downregulation of IFN-g is a major reason for the escalation of subclinical to clinical disease.  This information will be helpful in the development of intervention strategies for control of paratuberculosis.  Improved vaccines are needed to protect animals against infection with M. paratuberculosis.  Our work to develop a DNA vaccine has identified seven sublibraries that are protective and one that exacerbates infection.  Two protective libraries were sequenced and a microarray system of gene pooling was evaluated.  Host protection was observed after vaccination with the microarray gene pools containing 300 genes per pool.  In order to make this more feasible, work will continue to reduce the number of genes per pool by performing further clonal array analysis.  This technique may be useful in development of a DNA vaccine for M. paratuberculosis infection.  C. Significant Acitivities that Support Special Target Populations.  Experiments were conducted with a commercial pasteurizer unit to evaluate destruction of M. paratuberculosis, Salmonella, and Mycoplasma in waste milk fed to calves.  Results demonstrated that the pasteurizer unit could effectively destroy each of these pathogens in milk, thereby reducing potential infection of young calves.  In addition, heat treatment of colostrum was effective in inactivating M. paratuberculosis.  This information will benefit small farms by providing an economical means for destroying pathogens in waste milk before being fed to calves.  5. Describe the major accomplishments over the life of the project, including their predicted or actual impact.  Significant progress has been made in the development and/or optimization of new diagnostic tools for the detection of Johne's disease.  Fecal culture methodology has been improved and diagnostic laboratories throughout the U.S. are using this technique.  Optimization of the IFN-g test for detection of subclinically infected animals has been achieved through incorporation of our antigen preparations in the test, allowing for detection of infected animals less than 6 months of age.  The ability to accurately identify animals in the early stages of disease is a critical control point for producers who must manage the spread of this disease within their herd.  Development of a simple, rapid DNA extraction method for M. paratuberculosis from fecal samples may yield more timely and sensitive detection of infected animals that are shedding the bacteria in their feces.  This extraction method will be used by diagnostic laboratories conducting testing for Johne's disease and can be applied to multiple species of animals.  Little information is available on host immune responses to M. paratuberculosis infection in cattle and other species of ruminants.  Host immune responses in the subclinical and clinical stages of disease have been evaluated using cattle, bison, and a mouse model.  Our work has shown that secretion of proteins (cytokines, IFN-g, IL-10, TGF-b) by immune cells and activation of immune cells is affected by the different stages of infection.  This information is helpful in developing diagnostic tools for Johne's disease as well as treatment strategies.  IFN-g is currently utilized in a test format to detect infection in subclinically infected animals (early infection) but it is not known if treatment with recombinant IFN-g would help resolve disease in clinically infected cattle.  M. paratuberculosis has been implicated as a causative factor in Crohn’s's disease, an inflammatory bowel disease in humans.  A proposed method of infection is via contaminated dairy products from cows with Johne's disease.  Our work has demonstrated that pasteurization of milk effectively destroys M. paratuberculosis.  This work is critical in assuring a safe, clean product for U.S. consumers.  Improvement of diagnostic tools and development of vaccines is dependent upon the identification of specific antigens for M. paratuberculosis.  A project for sequencing the M. paratuberculosis genome was initiated and completed, resulting in the identification of several clones specific to M. paratuberculosis.  One clone, HspX, has been characterized in our laboratory and has been patented.  Thirty additional clones have been cloned and expressed and are being evaluated in diagnostic tests.  Further characterization of additional clones and expression of proteins/peptides from them will aid in the development of more sensitive diagnostic tests.  6. What science and/or technologies have been transferred and to whom?  When is the science and/or technology likely to become available to the end- user (industry, farmer, other scientists)?  What are the constraints, if known, to the adoption and durability of the technology products?  Polyclonal antibodies to preparations of M. paratuberculosis developed in our laboratory and proteins/peptides specific to M. paratuberculosis have been transferred to several companies (Cooperative Research and Development Agreements or Material Transfer Agreements) in collaborative efforts to develop new diagnostic tools for Johne's disease.  Commercial availability of the new diagnostic tools is dependent upon the companies involved and successful use of these tools.  Diagnostic tests such as the fecal culture method and IFN-g test for the detection of paratuberculosis in cattle have been transferred successfully to APHIS and diagnostic laboratories.  Culture methods for milk have also been transferred to other laboratories for use in their research program.  The Bovine Macrophage cell line developed in our laboratory has been transferred to over 75 institutions worldwide for research purposes.  This cell line is an immortalized bovine macrophage that is useful for in vitro experiments.  Invitations to speak about effects of pasteurization on destruction of M. paratuberculosis have resulted in the transfer of this information to the dairy industry and producers.  Invitations to give talks about current research in Johne's disease, including development of diagnostic tools and the sequencing of the genome have resulted due to high interest of the cattle industry.  Constraints in the utilization of technology for new diagnostic tools are caused by the unique genetic and physical characteristics of the bacteria.  The genetic homology between M. paratuberculosis and M. avium, a cross-reactive mycobacterium that is found in field situations, is greater than 98%.  This causes significant problems in identifying antigens for diagnostic tools that are highly specific for M. paratuberculosis.  Also, problematic is the host immune response to infection with M. paratuberculosis.  Host immunity to infection is characterized by cell-mediated immunity in the early stages of disease and humoral immunity in the later stages.  This precludes use of one immunologic diagnostic tool for the detection of infected animals.  This problem is exacerbated by the lack of knowledge of the immunology and pathogenesis of this disease.  7. List your most important publications in the popular press and presentations to organizations and articles written about your work. Invited talks: Stabel, J. R. Zoonosis Symposium in Tsukuba, Japan, Feb, 2004. Stabel, J. R. Veterinary Microbiology Seminar Series, ISU, Ames, IA, March, 2004. Stabel, J. R. American College of Veterinary Internal Medicine, Minneapolis, MN, June, 2004. Robbe-Austermann, S. American Veterinary Medicine Association, Philadelphia, PA, July, 2004. PUBLICATIONS: 2003/10 TO 2004/09
1. Khalifeh, M.S., Stabel, J.R. 2004. Effects of interferon-g, interlukin-10, and transforming growth factor-b on the survival of Mycobacterium paratuberculosis in monocyte-derived macrophages from naturally infected cattle. Infection and Immunity. 72:1974-1982.
2. Stabel, J.R., Bosworth, T.L., Kirkbride, T.A., Forde, R.L., Whitlock, R.H. 2004. A simple, rapid, and effective method for the extraction of Mycobacterium paratuberculosis DNA from fecal samples for PCR. Journal of Veterinary Diagnostic Investigation. 16:22-30.
3. Bannantine, J.P., Hansen, J.K., Paustian, M., Amonsin, A., Li, L.L., Stabel, J.R., Kapur, V. 2004. Expression and immunogenicity of proteins encoded by sequences specific to Mycobacterium avium subsp. paratuberculosis. Journal of Clinical Microbiology. 42:106-114.
4. Stabel, J.R., Palmer, M.V., Whitlock, R.H. 2003. Immune responses after oral inoculation of weanling bison or beef calves with a bison or cattle strain of Mycobacterium paratuberculosis. Journal of Wildlife Diseases.  39:545-555.
5. Paustian, M., Amonsin, A., Kapur, V., Bannantine, J.P. 2004.  Charatetrization [sic] of novel coding sequences specific to Mycobacterium avium subsp. paratuberculosis: implications for diagnosis of Johne's disease. Journal of Clinical Microbiology. 42:2675-2681.
6. Waters, W.R., Miller, J.M., Palmer, M.V., Stabel, J.R., Jones, D.E., Koistinen, K.A., Steadham, E.M., Hamilton, M.J., Davis, W.C., Bannantine, J.P. 2003. Experimental Mycobacterium avium subsp. paratuberculosis infection of calves: early induction of a humoral and cellular immune response. Infection and Immunity. 71:5130-5138.
7. Amonsin, A., Li, L., Zhang, Q., Bannantine, J.P., Motiwala, A., Sreevatsan, S., Kapur, V. 2004. A multi-locus short sequence repeat sequencing approach for Mycobacterium avium subspecies paratuberculosis stain differentiation. Journal of Clinical Microbiology. 42:169-1702.

 

PROJ TYPE: USDA INHOUSE PROJ STATUS: TERMINATED
START: 01 MAY 2000 TERM: 31 DEC 2003 FY: 2004
INVESTIGATOR: Stabel, J.R.   
PERFORMING INSTITUTION:  Agricultural Research Service.  Ames, Iowa 50010
SUBJECT: Study of thermal inactivation of Mycobacterium paratuberculosis in fluid milk.
OBJECTIVES: 1. Use a slug-flow device to determine survivability of M. paratuberculosis in UHT milk at 8 time/temperature combinations.  2. Determine D and Z values for M. paratuberculosis in milk using the slow-flow device.  3. Use a laboratory-scale pasteurizer unit to corroborate results of experiments in objective 1.  4. Use a pilot-scale HTST pasteurization system to determine survivability of M. paratuberculosis in raw milk based upon results from objectives 1 and 3. APPROACH: UHT milk inoculated with 3 different bovine isolates of M. paratuberculosis will be heated using both a slug-flow heat exchanger and a laboratoryscale pasteurizer unit at 8 different time/temperature combinations ranging from 62.7 C for 30 min to 97.4 C for 25 sec.  Treatments will be replicated 3 times with 2 different inoculum levels.  After heat treatment, milk will be centrifuged and the pellet resuspended in PBS.  Samples are then diluted and then inoculated onto solid medium (HEYM) and in liquid medium (BACTEC).  Solid agar slants are inoculated at 37 C up to 6 months.  Colonies are confirmed as M. paratuberculosis by acid-fast stain and DNA extraction and PCR analysis using IS900 primers for a target product of 229 bp.
FUNDED BY INTERNATIONAL DAIRY FOODS ASSOCIATION PROGRESS: 2000/05 TO 2003/124. What were the most significant accomplishments this past year? D. Progress Report.  This report serves to document research conducted under a trust agreement between ARS and the Internationl Dairy Foods Association.  Additional details of research can be found in the report for the parent project 3625-32000-062-00D Understanding Host Pathogen Interactions for the Diagnosis and Control of Johne's Disease (Paratuberculosis).  Experiments to evaluate 7 proposed time/temperature combinations for heat treatment of milk inoculated with M. paratuberculosis have been completed.  These experiments have been completed on both the slug flow and the HTST units, all three bacterial strains at 2 inoculum levels have been tested.  Culture work with both solid and liquid mediums has been completed as well as verification of all suspect positives by PCR, subculture and bacterial staining.  Results suggest that US pasteurization standards effectively destroy up to 100,000,000 M. paratuberculosis organisms.  The exception is the pasteurization of milk for cheese production that was only effective in destroying 100,000 organisms.  This work is important to the dairy industry and consumers so they can be assured that pasteurization provides a safe, clean product.
PUBLICATIONS: 2000/05 TO 2003/12
No publications reported this period.

 

PROJ TYPE: USDA INHOUSE PROJ STATUS: NEW
START: 01 SEP 2002 TERM: 31 AUG 2005 FY: 2005
INVESTIGATOR: Bannantine J P; Kapur V; Wells S J; Barletta R G
PERFORMING INSTITUTION:  Agricultural Research Service.  Ames, Iowa 50010
SUBJECT:  Functional genomic analysis of Mycobacterium paratuberculosis.
OBJECTIVES: Identify all DNA sequences specific to Mycobacterium paratuberculosis.  Confirm specificity of these DNA sequences by PCR amplification with several different species of mycobacteria.  Produce and purify recombinant proteins from these specific sequences to evaluate utility in a serological-based test or other immunological assay.  Validate resulting developed tests for detection of cattle infected with M. paratuberculosis in a whole herd setting.
APPROACH: Computerized DNA sequence alignments will be performed will the complete genome sequences of M. paratuberculosis and the genetically similar M. avium genomes.  From these alignments, we will have a list of candidate sequences present in M. paratuberculosis and not M. avium.  These sequences will then be checked, again by computerized alignment, against the complete genomes of M. leprae and M. tuberculosis.  Sequences specific to only M. paratuberculosis will be further confirmed by PCR amplification and DNA hybridization against genomic DNA from several mycobacterial species.  Those sequences that have passed these specificity tests will be cloned and expressed in E. coli.  The resulting recombinant proteins will be evaluated for use in a variety of immunologic-based tests aimed at detecting M. paratuberculosis within infected cattle.  Developed test(s) will be validated using blood and fecal samples from six well-characterized cattle herds in Minnesota.
PROGRESS: 2003/10 TO 2004/094.  What were the most significant accomplishments this past year? D. Progress Report.  This report serves to document research conducted under a trust agreement between ARS and USDA-CSREES-National Research Initiative-Competitive Grants Program (NRI-CGP).  Additional details of research can be found in the report for the parent project 3625-32000-062-00D  Understanding Host Pathogen Interactions for the Diagnosis and Control of Paratuberculosis (Johne's).  This trust agreement between ARS (NADC) and the NRI-CGP encompasses measures to ensure animal health through the control and management of the disease by improving detection methods for Johne's disease.  This project has the objective of analyzing the genome of M. paratuberculosis for identification and analysis of unique genetic sequences that can be used to develop diagnostic tools for the detection of M. paratuberculosis infection.  From this analysis, over 30 genes specific to M. paratuberculosis were identified.  Each of these 30 genes have been cloned and expressed in Escherichia coli.  The resulting E. coli expressed protein(s) were purified and analyzed as a potential diagnostic antigen.  Published data show at least five proteins may be good diagnostic antigens.  In the future we will determine if any recombinant proteins induce gamma interferon production.
PUBLICATIONS: 2003/10 TO 2004/09
1. Paustian, M., Amonsin, A., Kapur, V., Bannantine, J.P. 2004.  Charatetrization [sic]of novel coding sequences specific to Mycobacterium avium subsp. paratuberculosis: implications for diagnosis of Johne's disease. Journal of Clinical Microbiology. 42:2675-2681.
2. Bannantine, J.P., Hansen, J.K., Paustian, M., Amonsin, A., Li, L.L., Stabel, J.R., Kapur, V. 2004. Expression and immunogenicity of proteins encoded by sequences specific to Mycobacterium avium subsp. paratuberculosis. Journal of Clinical Microbiology. 42:106-114.

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT PROJ STATUS: NEW
START: 16 SEP 2004 TERM: 31 JUL 2007 FY: 2004
INVESTIGATOR: Stabel J R; Beiz D
PERFORMING INSTITUTION: Animal Science.  Iowa State University.  Ames, Iowa 50011
SUBJECT: Cellular activation in different stages of infection with Mycobacterium avium subsp. paratuberculosis in cattle.
OBJECTIVES: The objective of this cooperative research project is to elucidate host immune response mechanisms for cattle during infection with Mycobacterium avium subsp. paratuberculosis.  APPROACH: Peripheral blood mononuclear cells will be isolated from noninfected and naturally infected cattle and analyzed by flow cytometry for activation markers that may be involved in host immune responses.  Because monoclonal antibodies for some cell activation markers may not be available for bovine, this project will encompass sequence identification of conserved regions of the gene, peptide synthesis, and monoclonal antibody production to the peptide of interest.  Concurrent analyses will be performed to evaluate intracellular expression of cytokines that may be involved in host immune responses to M. paratuberculosis.

 

PROJ TYPE: USDA INHOUSE PROJ STATUS: NEW
START: 15 APR 2004 TERM: 14 APR 2006 FY: 2005
INVESTIGATOR: Bannantine J P; Stabel J R; Paustian M; Robbe Austerman S
PERFORMING INSTITUTION:  Agricultural Research Service.  Ames, Iowa 50010
SUBJECT:  Johne's Disease Integrated Program in research, education, and extension.
OBJECTIVES: The Johne's Disease Integrated Program (JDIP) is a multi-institutional USDA program that has the major objective of combating Johne's Disease.  This will be done through focused research on several key areas in Johne's Disease.  The program is designed such that there are four main research projects and four scientific cores.  The principle investigators receiving subcontract funds (John Bannantine and Judy Stabel) are directing two of the scientific cores entitled, Genomics, Antibodies & Proteomics (GAP) and Animal Models & Facilities (AMF).  The primary goal of the GAP core is to develop and distribute tools, reagents, and protocols that leverage recent technological advances in genomics and proteomics for members of the JDIP community and stakeholders.  The primary goal of the AMF core is to develop and validate animal models and to provide uniform care and maintenance of animals utilized as experimental models for investigations conducted within JDIP.
APPROACH: The GAP core will develop an oligonucleotide array representing all genes in M. paratuberculosis (Map).  This core will also produce a clone set of the coding sequences in Map.  It will also make available transposon mutants for JD research.  The AMF core will perform two specific tasks.  (1) Assemble and maintain a current listing of available BL-2 certified animal facilities at various JDIP sponsored institutions and (2) establish calf-challenge models for JD research including study of the immune response to virulent Map and candidate vaccines.  Biosafety certification pending.

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 2002-35204-12321 PROPOSAL NO: 2002-02228
START: 01 SEP 2002 TERM: 31 AUG 2005 FY: 2005 GRANT YR: 2002 GRANT AMT: $285,000
INVESTIGATOR: Bannantine, J. P.; Kapur, V.; Wells, S. J.; Barletta, R. G.;
Stabel, J. R.
PERFORMING INSTITUTION:  National Animal Disease Ctr.  Ames, Iowa 50010
SUBJECT:  Functional Genomic Analysis of Mycobacterium paratuberculosis.
NON-TECHNICAL SUMMARY: Johne's disease is caused by the bacterium Mycobacterium paratuberculosis and is responsible for the annual loss of more than $220 million dollars to animal production in the United States.  A major obstacle in control of Johne's disease is obtaining an accurate diagnosis of M. paratuberculosis-infected animals.  Therefore, the goal of this project is to identify DNA sequences from the M. paratuberculosis genome that are useful in diagnosis of Johne's disease and can be applied to testing entire cattle herds.  To accomplish this goal, the following objectives are proposed. (1) Identify M. paratuberculosis DNA sequences not present in any other mycobacteria.  We will address the need for diagnostic genes or DNA sequences through the use of comparative genomics to identify M. paratuberculosis DNA sequences that are not present in other mycobacteria.  (2) Evaluation of specific antigens or proteins for detecting cattle infected with M. paratuberculosis is the second objective.  Immunological assays will be used to determine if sera from cattle with Johne's disease detect proteins produced from these unique genes or sequences.  (3) The final objective involves validation of developed tests for detection of cattle with Johne's disease. Diagnostic tests developed in the proposed studies will then be used to test well-characterized whole cattle herds in Minnesota.
OBJECTIVES: Identify all DNA sequences specific to Mycobacterium paratuberculosis.  Confirm specificity of these DNA sequences by PCR amplification with several different species of mycobacteria.  Produce and purify recombinant proteins from these specific sequences to evaluate utility in a serological-based test or other immunological assay.  Validate resulting developed tests for detection of cattle infected with M. paratuberculosis in a whole herd setting.
APPROACH: Computerized DNA sequence alignments will be performed will the complete genome sequences of M. paratuberculosis and the genetically similar M. avium genomes.  From these alignments, we will have a list of candidate sequences present in M. paratuberculosis and not M. avium.  These sequences will then be checked, again by computerized alignment, against the complete genomes of M. leprae and M. tuberculosis.  Sequences specific to only M. paratuberculosis will be further confirmed by PCR amplification and DNA hybridization against genomic DNA from several mycobacterial species.  Those sequences that have passed these specificity tests will be cloned and expressed in E. coli.  The resulting recombinant proteins will be evaluated for use in a variety of immunologic-based tests aimed at detecting M. paratuberculosis within infected cattle.  Developed test(s) will be validated using blood and fecal samples from six well-characterized cattle herds in Minnesota.
PROGRESS: 2002/09 TO 2005/08   The goal of this proposal, entitled, Functional genomic analysis of Mycobacterium paratuberculosis, is to identify coding sequences (DNA that encodes for proteins) from the M. paratuberculosis genome that are useful in diagnosis of Johne's disease.  By combining a comparative genomics approach with PCR amplification and microarray analysis, we have identified a total of 39 genes that are present uniquely in M. paratuberculosis.  Those gene sequences that were successfully cloned and expressed in E. coli were evaluated for immunogenicity using sera from clinical cattle.  Five to six solid candidate antigens have been identified as a result of these studies.  Novel antigens have already been incorporated into a new diagnostic assay (involving flow cytometry) and the validation in dairy cattle herds in Minnesota and Japan is nearing completion.  In summary, all of the objectives of this project have been successfully completed.  IMPACT: 2002/09 TO 2005/08  Because of the current difficulties in diagnosis of Johne's disease dairy cattle, this new flow cytometry assay (and subsequent ELISA based test-manuscript in preparation) is expected to make a large impact on identifying infected animals faster and thus breaking the insidious transmission cycle that perpetuates Johne's disease throughout herds.  This means greater control of the disease and a lessening of the economic costs attributed to the disease. Cost reductions could be as large as 10-fold!
PUBLICATIONS: 2002/09 TO 2005/08
1. Eda, S., B. Elliott, M. C. Scott, W. R. Waters, J. P. Bannantine, R. H. Whitlock, and C. A. Speer. 2005. New method of serological testing for Mycobacterium avium subsp. paratuberculosis (Johne's disease) by flow cytometry. Foodborne Pathogens and Disease 2:250-262.
2. Paustian, M. L., V. Kapur, and J. P. Bannantine. 2005. Comparative genomic hybridizations reveal genetic regions within the Mycobacterium avium complex that are divergent from Mycobacterium avium subsp. paratuberculosis isolates.  Journal of Bacteriology 187:2406-2415.
3. Li, L., J. P. Bannantine, Q. Zhang, A. Amonsin, B. J. May, D. Alt, N. Banerji, S. Kanjilal, and V. Kapur. 2005. The complete genome sequence of Mycobacterium avium subspecies paratuberculosis. Proceedings of the National Academy of Sciences 102:12344-12349.
4. Huntley, J. F. J., J. R. Stabel, and J. P. Bannantine. 2005. Immunoreactivity of the Mycobacterium avium subsp. paratuberculosis 19-kDa lipoprotein. BMC Microbiology 5:3.
5. Paustian, M. L., A. Amonsin, V. Kapur, and J. P. Bannantine. 2004.  Characterization of novel coding sequences specific to Mycobacterium avium subsp. paratuberculosis: implications for diagnosis of Johne's disease. Journal of Clinical Microbiology 42:2675-2681.
6. Bannantine, J. P., J. K. Hansen, M. L. Paustian, A. Amonsin, L. Li, J. R. Stabel, and V. Kapur. 2004. Expression and immunogenicity of proteins encoded by sequences specific to Mycobacterium avium subsp. paratuberculosis. Journal of Clinical Microbiology 42:106-114.
7. Waters, W. R., B. J. Nonnecke, M. V. Palmer, S. Robbe-Austermann, J. P. Bannantine, J. R. Stabel, D. L. Whipple, J. B. Payeur, D. M. Estes, J. E. Pitzer, and F. C. Minion. 2004. Use of recombinant ESAT-6:CFP-10 fusion protein for differentiation of infections of cattle by Mycobacterium bovis and by M. avium subsp. avium and M. avium subsp. paratuberculosis. Clinical and Diagnostic Laboratory Immunology 11:729-735.
8. Bannantine, J. P., E. Baechler, Q. Zhang, L. Li, and V. Kapur. 2002. Genome scale comparison of Mycobacterium avium subspecies paratuberculosis with Mycobacterium avium subspecies avium reveals potential diagnostic sequences. Journal of Clinical Microbiology 40:1303-1310.
PROJECT CONTACT:
     Name: Bannantine, J. P. Phone: 515-663-7340. Fax: 515-663-7458
     E
mail: jbannant@nadc.ars.usda.gov

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 01 JUL 2003 TERM: 30 JUN 2006 FY: 2005
INVESTIGATOR: Hostetter, J.; Jones, D.; Wannemuehler, M.
PERFORMING INSTITUTION: Veterinary Medicine.  Iowa State University.  S. and 16th Elwood.  Ames, Iowa 50011
SUBJECT:  Comparison of bovine dendritic cell stimulation of T cells isolated from Mycobacterium avium subspecies paratuberculosis (M. a. ptb).
NON-TECHNICAL SUMMARY: Johne's disease is an economically significant enteric disease of ruminants.  A major problem in the control of Johne's disease is the significant number of clinically healthy, but infected animals, which escape detection through current diagnostic methods.  It is the pupose of this study to test the hypothesis that a dendritic cell induced proliferation assay of peripheral blood T cells can distinguish M. a. ptb infected from non-infected cattle.
OBJECTIVES: The objectives include purification of dendritic cells (DC).  Bovine dendritic cells will be generated from bovine peripheral blood mononuclear cells (PBMC).  The animals used for blood collection will be positive for M. a. ptb infection by fecal culture; however; will not be demonstrating clinical signs (weight loss, diarrhea).  Dendritc cells will be identified by morphologic features, cell surface marker expression, and potential for endocytosis.  Dendritic cells once characterized will be used to identify M. a. ptb infected animals by initiating strong recall responses in autologous T cells.  Such a recall response will be negative in animals not infected with M. a. ptb.  APPROACH: Blood samples will be collected from M. a. ptb infected cattle.  From these blood samples we will generate dendritic cells from peripheral blood mononuclear cells via culture with GM-CSF and IL-4 cytokines for 7 days.  In addition, autologous T-lymphocytes will be isolated.  Dendritic cells will be characterized by morphology, phenotype, and by functional assays.  Dendritic cells will be pulsed with M. a. ptb antigen, then incubated with autologous T lymphocytes (isolated from the same blood sample).  We will then evaluate the T-lymphocyte responses (proliferation, production of proinflammatory cytokines).  We will use dendritic cells and T lymphocytes from non infected cattle as a negative control.  We expect to identify proliferation and cytokine production by the T-lymphocytes isolated from peripheral blood of the M. a. ptb infected animals, but not in T lymphocytes from M. a. ptb negative animals.
PROJECT CONTACT:
     Name: Hostetter, J.  Phone: 515-294-0953
     E
mail: jesseh@iastate.edu

 

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JUL 2001 TERM: 30 JUN 2002 FY: 2001
INVESTIGATOR: Thoen, C. O.; Cheville, N. F.
PERFORMING INSTITUTION: Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Evaluation of a Mycobacterium avium ss ptb. purified protein derivative for use in detecting subclinical Johne's disease in cattle.
NON-TECHNICAL SUMMARY: Available information indicates Johne's disease is present in 40% of the dairy herds and 22% of the cattle in Iowa (NAHMS).  Diagnostic tests are not suitable for monitoring young replacement cattle for the presence of infection or for early detection of infection in cattle in herds in which the disease persists.  The purpose of this project is to evaluate a PPD skin test for use in the diagnosis of subclinical Johne's disease.
OBJECTIVES: Diagnostic procedures currently available detect cattle in advanced stages of Johne's disease.  However, these tests are of little or no value in the detection of cattle in the early stages (subclinical) of infection.  Since many dairy and beef cattle owners are expanding their herds by purchasing additions (heifers 2-3 yrs of age) from unknown sources, it is necessary to validate a reliable, inexpensive test for identifying additions exposed to Mycobacterium avium ss paratuberculosis before the appearance of clinical disease (diarrhea and emaciation).  Such a test could also be of significant value to producers with Johne's positive herds in the control of disease as the test would provide for the early detection and removal of infected cattle before they become contagious (shedding organisms in the feces) and contaminate the environment and expose non-infected cattle in the herd.  Objectives of this project are: 1) Evaluate the sensitivity of a M. avium ptb PPD skin test for use in the diagnosis of subclinical Johne's disease in cattle; 2) Determine the specificity of the PPD skin test in cattle in Johne's negative herds; 3) Evaluate a M. avium ptb PPD in a gamma interferon assay in all animals that respond on skin test; and 4) Histopathologic evaluation of skin test responses including determination of T-cell subpopulations.
APPROACH:  Investigations will be conducted to obtain information on the sensitivity of M. avium ss paratuberculosis PPD for use in the early diagnosis of subclinical Johne's disease in cattle.  Skin tests will be conducted on cattle in herds in which Johne's disease has been diagnosed; tissues (ileocecal value and adjacent lymph nodes) will be collected from animals that respond on skin test for mycobacteriologic and immunohistochemical examinations.  The specificity of the test will be evaluated in cattle in herds in which Johne's disease has not been diagnosed in the past 5 years and negative on laboratory examinations (fecal culture and ELISA).  The 2 year study is designed to collect tissue specimens from 40 skin test positive cattle in 8 herds in which Johne's disease has been diagnosed previously by an organism based test (culture and/or polymerase chain reaction) and from 40 cows in 8 herds in which Johne's disease has not been diagnosed during the past 5 years and which are negative on culture and/or PCR of fecal specimens.  Blood will be collected from animals that respond on skin test for gamma interferon assay using M. avium ptb PPD according to procedures described by Biocor.  Tissues (ileocecal valve and adjacent lymph nodes) will be collected from each cow for mycobacterologic and immunohistochemical examination.
PROGRESS: 2001/07 TO 2002/06  Skin tests have been conducted in 865 cattle in 8 herds in which Johne's disease was diagnosed previously by mycobacteriologic examinations.  Fecal specimens have been collected from each of the cows for bacteriologic examinations.  Enzyme linked immunosorbent assays (IDEXX and ISU) have been conducted on serums collected from each of the cattle.  Tissues have been collected from each of 10 cows for PCR, cultural examinations and histopathologic evaluation.  Tissues from five of six cows positive on skin test were culture positive. Positive skin tests were detected as early as 1 year before positive ELISA results were obtained on sera, and/or organisms were identified in feces.
IMPACT: 2001/07 TO 2002/06  Development of a sensitive diagnostic test such as the skin test for detecting 2-3 year heifers and other herd additions is of principal importance to cattle producers interested in purchasing animals for expanding their cattle herds.  Currently, available procedures are of little or no value in detecting Ma ptb infected animals in the early stages of disease.
PUBLICATIONS: 2001/07 TO 2002/06
No publications reported this period
PROJECT CONTACT:
     Name: Thoen, C. O.  Phone: 515-294-7608.  Fax: 515-294-8500
     E
mail: cthoen@iastate.edu

 

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JUL 2000 TERM: 30 JUN 2003 FY: 2003
INVESTIGATOR: Thoen, C. O.; Cheville, N. F.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Natural exposure of adult dairy cattle to Mycobacterium avium ss paratuberculosis-infected cattle under field conditions.
NON-TECHNICAL SUMMARY: No definitive information is currently available on the susceptibility of adult dairy cattle to Johne's disease on farm conditions.  The results of this research will provide useful information for herd owners in making decisions involving herd replacements as well as additions to expand herds in which Johne's disease has been diagnosed.
OBJECTIVES: Johne's disease has been reported to be widespread in dairy and beef herds in Iowa and throughout the U.S (up to 20 percent of herds).  Significant econmic losses to cattle producers results from loss of market value of slaughter cows due to emaciation, decreased milk production, and reduced income related to the inability to sell replacement breeding stock.  Since a high percentage of these diary producers with Johne's disease purchase adult replacements, it is important to know if these animals become infected after exposoure to cattle in a herd in which Johne's disease persists. Information on the susceptibility of adult cattle to infection with Mycobacterium avium ss paratuberculosis (Ma ptb) under natural conditions is not available.  Our hypothesis is adult cattle are resistant to infection with Ma ptb under natural field exposure.  It is our believe [sic] that Ma ptb is transmitted vertically from dam to offspring during the neonatal period and that Johne's disease is perpetuated by such transmission.  Our specific aims are: 1) to determine if Johne's negative adult dairy cattle are infected with Ma ptb under natural conditions during a 2-yr. period following addition to a herd in which Johne's disease has been diagnosed; 2) to obtain information on offspring of Johne's negative cattle following exposure to Ma ptb-infected cattle under field conditions; 3) to determine if adult cattle naturally exposded to Ma ptb shed the bacterium in feces or develop clinical Johne's disease during the study period; and 4)to determine the reliability of the cutaneous Johne's PPD skin test in the detection of infection by Ma ptb during early, clinically silent stages of the disease.
APPROACH: Ten, 2-yr. old pregnant dairy animals from a herd in which Johne's disease has not been diagnosed for 5 years and negative on ELISA, fecal culture and on skin test using Mycobacterium paratuberculosis antigen will be used in the study.  The 10 negative cattle will be placed on the premises of a Johne's positive herd.  The positive herd is a herd of 40 or more cows in which Johne's disease has been diagnosed by isolation of M.ptb from feces of cattle in the herd during the past year.  ELISA and fecal culture or PCR will be conducted on specimens collected at 6-mo. intervals for 2 years following the addition of the 10 negative cattle and from cattle in the herd in which Johne's disesase persists.  Skin tests will be conducted at the same intervals using Ma ptb, a reference purified protein derivative recently produced and standardized by bioassay in guinea pigs.  Use of this purified antigen provides a highly sensitive rapid test for tecting animals early after expososure to Ma ptb not previously available using other tests.  Cows will be necropsied upon completion of the study and tissue specimens collected for laboratory examinations.  An immunohistochemical assay to specifically detect Ma ptb antigens in formalin-fixed, paraffin-embedded tissue sections will be used in the study.
PROGRESS: 2000/07 TO 2003/06  Animals 2 years of age introduced into a herd in which Johne's disease was present failed to develop clinical Johne's disease.  Shedding of Mycobacterium avium ss paratuberculosis in the feces was detected in 1 animal after exposure for 3 years. M. avium ss paratuberculosis was not isolated from tissues of any of the negative additions at necropsy. IMPACT: 2000/07 TO 2003/06  Johne's disease causes significant economic losses to dairy cattle producers.  The information obtained in this investigation suggest that only limited economic losses are realized when 2 year old cattle are naturally exposed to M. avium ss paratuberculosis.
PUBLICATIONS: 2000/07 TO 2003/06
No publications reported this period
PROJECT CONTACT:
     Name: Thoen, C. O.  Phone: 515-294-7608.  Fax: 515-294-8500
     E
mail: cthoen@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 01 JUL 2002 TERM: 30 JUN 2004 FY: 2005
INVESTIGATOR: O'Connor, A.; Robbe, S.; Evans, R.; Ensley, D.
PERFORMING INSTITUTION: Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Estimating the sensitivity and specificity of the three commercial ELISA's, the skin test and fecal culture in beef cattle.
NON-TECHNICAL SUMMARY: Once a producer's herd becomes infected with Johne's disease, it is very difficult to develop an eradication program that is timely, reasonable in cost, and effective.  Recently, new statistical methods have been developed to evaluate the performance of diagnostic tests using several populations of animals with different prevalence of disease.  This technique allows us to evaluate newer and more sensitive tests in real productions systems at a reasonable cost. OBJECTIVES:  Johne's disease is a chronic bacterial disease of ruminants caused by Mycobacterium avium subspecies paratuberculosis.  Once a producer's herd becomes infected with Johne's disease, it is very difficult to develop an eradication program that is timely, reasonable in cost, and effective.  Therefore, developing and using prevention programs is critical for producers.  The majority of producer's herds become infected by purchasing infected subclinical animals.  The diagnostic tests commercially available are not capable of accurately identifying exposed or infected subclinical animals.  New and developmental tests that detect cell-mediated immune responses have the potential of improving our ability to detect subclinically infected animals.  However, one of the difficult challenges researchers face when attempting to evaluate a new diagnostic test is evaluating that test against a current gold standard.  Recently, new statistical methods have been developed to evaluate the performance of diagnostic tests using several populations of animals with different prevalence of disease.  This technique allows us to evaluate newer and more sensitive tests in real productions systems.  Although these methods will never replace experiments, they do allow us to evaluate diagnostic tests, especially false positive rates within the context of the production system and at a reasonable cost.  The majority of the research concerning Johne's disease has been done in dairy cattle, not in beef cattle.  Consequently we have extrapolated the performance of diagnostic tests from dairy to beef and automatically have assumed the specificity and sensitivity of the diagnostic tests are the same in extensive beef cattle operations and intensive dairy operations.  This may be a reasonable assumption, but the population dynamics and stress levels are very different between beef cattle and dairy cattle.  For example, the average age of a beef cow is usually between 7-8 years of age, the average age of a dairy cow is 3-4 years.  Consequently there is a critical need to evaluate these tests in beef cattle. Our objective is to evaluate the following tests in beef cattle: 1. Three commercial ELISA's: HerdChek by IDEXX, ParaChek by Biocor, and SERELISA by Synbiotics; 2) The skin test with the new NVSL Johnin antigen, and compare the results of the skin test against the gamma interferon; 3) The fecal culture on HEY media.  Once we collect the results of all the diagnostic tests, the data will be entered into a Hui and Walter model. Sensitivities, specificities, and prevalence of the populations will be estimated.
APPROACH: 1.) Identify 3 positive herds and 3 negative herds.  These herds must have 100+ animals and have had confirmed Johne's' disease.  2.) Draw blood using the tail vein, collect feces, and inject 0.1 ml of Johnin in the caudal fold of the tail.  3.) Age of the animals and body condition scores will also be collected.  These samples will all be collected in the summer and fall of 2002.  4.) The skin test injection site will be read in 72 hours.  5.)  These results will be evaluated using Bayesian statistical methods and the Hui and Walter model.
PROGRESS: 2002/01 TO 2002/12
New project: no progress report at this time.
PUBLICATIONS: 2002/01 TO 2002/12
No publications reported this period
PROJECT CONTACT:
     Name: O'Connor, A.  Phone: 515-294-5012.  Fax: 515-294-1072
     E
mail: oconnor@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 01 SEP 2002 TERM: 31 AUG 2004 FY: 2005
INVESTIGATOR: Thoen, C. O.
PERFORMING INSTITUTION: Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Application of a skin test using Mycobacterium avium ss paratuberculosis PPD for detection of early stages of Johne's disease in cattle.
NON-TECHNICAL SUMMARY: Johne's disease causes major economic losses to the dairy and beef industry.  Available information indicates Johne's disease is present in 40 percent of the dairy herds in Iowa and Minnesota.  The purpose of this work is to develop a reliable, practical test for detecting Johne's disease exposure to control and eradicate the disease.
OBJECTIVES: Efforts to control Johne's disease in cattle has been limited by the lack of reliable diagnostic tests for identifying all M. avium paratuberculosis-infected animals.  Several serologic tests have been developed for detecting antibodies in sera of cattle experimentally or naturally exposed to M. avium paratuberculosis.  However, a high percentage of the cattle infected with Ma ptb fail to have detectable mycobacterial antibodies in sera in the early stages of disease.  Cell-mediated immune responses (CMI) occur before detectable antibody in mycobacterial infections, therefore the use of an improved PPD (antigen) in skin test to monitor the CMI would provide for the detection of cattle in the early stages of disease.  Specific objectives are: 1) evaluate the sensitivity of a Ma ptb PPD in skin test for use in the diagnosis of Johne's disease in cattle; 2) determine the specificity of the PPD skin test in cattle in Johne's negative herds; 3) evaluate a gamma interferon assay in animals that respond on skin test.
APPROACH: Skin tests will be conducted using M. avium ss ptb PPD on 400 cattle, 10-14 months of age and 400 cattle 20-24 months of are in 10 or more herds in which Johne's disease has been diagnosed by mycobacteriologic examination and on 800 cattle of the same age in 10 herds in whch Johne's disease has not been diagnosed for 5 years.  Skin thickness will measured before injection of Maptb PPD in skin of the mid-cervical region and at 72 hours following injection.  The difference in sin thickness will be determined, recorded, and anlayzed.  Gamma interferon assays will be conducted on blood of animals that are positive on the skin test.
PROGRESS: 2003/01 TO 2003/12  Skin tests using the new PPD produced from ATCC 19698 (Neotype Strain of Mycobacterium avium ss paratuberculosis) have been conducted in cattle in 26 herds.  Positive responses were observed in 15 of 494 cattle, 10 to 26 months of age originating 17 herds in which Johne's disease had not been diagnosed.  Based on these results the specificity of the new PPD skin test is 97%.  Skin tests were also conducted on 757 cattle in 9 herds in which Johne's disease had been diagnosed previously.  Positive responses were observed in 121 (16%) of the 757 animals tested.  Most important, positive responses were observed in 10 to 26 month-old cattle in 8 of 9 herds in which Johne's disease had been diagnosed.  ELISA was positive in only 6 cattle of the same age group in 2 of 9 herds.
IMPACT: 2003/01 TO 2003/12  Information indicates Johne's disease is present in 40% of the dairy herds in Iowa.  Moreover, diagnostic tests are not suitable for monitoring young replacement cattle for the presence of infection or for early detection of infection in cattle in which disease persists.  In order to control and eradicate the disease it will be essential to have tests with improved sensitivity and specificity for detecting early stages of Ma ptb infection.
PUBLICATIONS: 2003/01 TO 2003/12
No publications reported this period
PROJECT CONTACT:
     Name: Thoen, C. O. Phone: 515-294-7608.  Fax: 515-294-8500
     E
mail: cthoen@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: EXTENDED
START: 01 AUG 1980 TERM: 30 JUN 2004 FY: 2005
INVESTIGATOR: Thoen, C. O.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Mycobacterial infections in animals.
OBJECTIVES: Characterization of mycobacterial isolates from domestic and exotic animals. APPROACH: In vitro investigations will include biochemical and drug susceptibility tests; ELISA will be conducted to select humoral antibodies in experimentally or naturally infected animals. PROGRESS: 2003/01 TO 2003/12  Mycobacteriologic examinations were conducted on tissues and fecal specimens submitted from 497 animals.  Mycobacterium avium ss paratuberculosis was isolated from 35 (7%) of the specimens.  M. avium ss avium was isolated from 8 specimens.  Rapidly growing nonphotochromogenic mycobacteria were isolated from 11 specimens.  M. tuberculosis was isolated from 2 specimens.
IMPACT: 2003/01 TO 2003/12 The isolation of M. avium ss paratuberculosis is in support of research to develop improved diagnostic tests for Johne's disease in cattle.  The disease is widespread in dairy herds in Iowa and causes significant economic losses to producers.
PUBLICATIONS: 2003/01 TO 2003/12
No publications reported this period
PROJECT CONTACT:
     Name: Thoen, C. O. Phone: 515-294-7608.  Fax: 515-294-8500
     E
mail: cthoen@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: EXTENDED
START: 01 MAR 1998 TERM: 28 FEB 2004 FY: 2004
INVESTIGATOR: Reynolds, D. L.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Merial Veterinary Scholars.
OBJECTIVES: The purpose of the Merial Veterinary Scholars Program is to increase the number of academically gifted veterinarians choosing to pursue a career in animal health and biomedical research.
APPROACH: One approach to encourage more veterinary medical students to consider animal health and biomedical research as a career in academia and/or the pharmaceutical industry is to provide them with practical research experiences and to expose them to good role models.  By provide a summer enrichment program we would continue to strengthen our efforts by placing veterinary graduated in research careers.  Veterinary students participating in the program will be paired with faculty and placed in a dynamic research setting.  The students will gain experience in research design, collection of data, statistical analysis, data interpretation, and presentation of research results.
PROGRESS: 2001/01 TO 2001/12  For the summer 2001 program nine scholars were selected. Their projects and mentors were as follows:
1. Carrie Berg. Mycobacterium avium subspecies paratuberculosis infection in Pygmy goats.  Mentor: Dr. Charles Thoen.  
2. Melissa Hirl. Analysis of lipoprotein variation in Mycoplasma hyopneumoniae.  Mentor: Dr. F. Chris Minion.  
3. Keith Koistinen. Evaluation of methods of detoxifying fumonisin using an in vitro assay and comparison with in vivo experiments. Mentors: Drs. Don Reynolds and Gary Osweiler.  
4. Erin Luxford. Role of antigen presenting cells in the in vitro recall response of T cells to specific Brachyspira hyodysenteriae antigen. Mentor: Dr. Michael Wannemuehler.  
5. Jed Overmann. Treatment of fatty liver in dairy cows by injection of glucagon. Mentor: Dr. Don Beitz.  
6. Regina Roane. Ovine dermatophytosis in the Midwest and evaluation of common therapies. Mentors: Drs. Mike Apley, Suelee Robbe, Jim Noxon, and Dan Morrical.  
7. Jon Schmidt. Sex determination of bovine embryos via polymerase chain reaction amplification of the amelogenin gene. Mentor: Dr. Curtis Youngs.
8. Regina Schroeder.  Genetic diversity of E. coli 0147 strains implicated in edema disease. Mentors: Drs. Nancy Cornick and Vijay Sharma.
IMPACT: 2001/01 TO 2001/12.  It is anticipated that by exposure to veterinary research that scholars would opt for careers in research.
PUBLICATIONS: 2001/01 TO 2001/12
No publications reported this period
PROJECT CONTACT:
     Name: Reynolds, D. L.  Phone: 515-294-9348.  Fax: 515-294-8956
     E
mail: dlr@iastate.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: TERMINATED
START: 01 OCT 2001 TERM: 30 SEP 2004 FY: 2004
INVESTIGATOR: Jones, D. E.; Steadham, E.; Hostetter, J.; Waters, R.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Bovine macrophage and T cell responses to Mycobacterium avium ssp. paratuberculosis infection.
NON-TECHNICAL SUMMARY: Currently there is no vaccine available to prevent or treat the cause of Johne's disease.  Development of a vaccine, or treatment, is likely to be impeded without an understanding of the mechanisms that allow Map to survive in vivo.  The purpose of this project is to understand those mechanisms.
OBJECTIVES: Johne's disease (Mycobacterium avium subspecies paratuberculosis or Map) has a significant impact on the dairy industry nationwide.  Milk production can be reduced from 2 to 19 percent per cow when compared to uninfected herdmates.  The impact of Map on beef cattle is not as readily apparent, but loss of body weight and inefficient feed conversion, as well as premature culling are consequences of Map infection that can adversely effect cattle revenues.  Currently there is no vaccine available to prevent or treat the cause of Johne's disease.  The ability of Map to produce disease is related to its ability to survive and replicate within the host macrophage.  Paradoxically, macrophages typically play an essential role in host defense of Map by ingesting and killing invading bacilli as part of a cell-mediated immune response that is driven by IFN-g from antigen-specific CD4+ T cells (Th1 cells).  The mechanisms by which Map survives within macrophages are not known, nor are the mechanisms that subvert the Th1 cell response and the induction of protective immunity.  Development of a vaccine, or treatment, is likely to be impeded without an understanding of the mechanisms that allow Map to survive in vivo.  The objectives of this proposal are based on our understanding that persistent infection develops because bovine macrophages infected with Map fail to kill the bacteria.  We hypothesize that there is a failure in the ability of Map-specific CD4+ a/b T cells to maintain Th1 phenotype and effectively activate macrophages to kill bacteria.  This project has two objectives towards understanding the immunopathology associated with Johne's disease in cattle and will critically examine one of the four scenarios, outlined above, that may impact the expression of the Th1 CD4+ T cell phenotype during this chronic disease.  Objective 1: Determine the effects of CD4+ T cell secreted or membrane associated products on macrophage activation in vitro and their influence on Map killing and intracellular trafficking.  Objective 2: Test the hypothesis that there is a failure of CD4+ a/b T cells to remain committed to a Th1 cell phenotype.
APPROACH: We will test the hypothesis by assaying bacterial killing by macrophages when stimulated with committed Th1 cells or cell products.  Th1 cells will be produced in vitro by culturing CD4+ T cells from naive animals with anti-CD3 and IL-12.  Infected macrophages will be cultured with the Th1 cells and/or their supernatants.  At various time points after infection the bacteria will be recovered from the macrophages and their viability will be determined by staining and CFU assay.  We will also evaluate several other aspects of macrophage activation under these conditions, specifically, the production of reactive nitrogen and oxygen intermediates and phagosome maturation.  We will also determine the commitment of CD4+ cells to the Th1 phenotype by repeatedly stimulating cells in vitro and assaying for proliferation and the production of IFN-g. IL-12 receptor b1 and b2 levels will be assayed as an additional indicator of Th1 phenotype.  Receptor expression will be determined by amplifying the mRNA from Th1 cells by PCR.  We will also determine the Th1 cell phenotype of Map-specific CD4+ T cells obtained from in vivo Map infections.  Their commitment to a Th1 phenotype will be tested by repeated stimulation in vitro.  These Th1 cells from Map infected animals will be compared to the equivalent cell type from M. bovis-infected animals.  M. bovis infection of cattle results in a persistent Th1 type immune response and are used as a positive control.  Evaluation of these aspects of the immune response to Map will facilitate our understanding of the immune response of cattle to Map infection and help in the evaluation of vaccine candidates
PROGRESS: 2002/01 TO 2002/12  A method of experimentally infecting calves with Mycobacterium avium subspecies paratuberculosis (Map) was developed.  This has allowed us to investigate the development of the infection through the first eight months of exposure.  Five months after intra-tonsilar inoculation with the bacteria, calves developed an antibody and lymphocyte response to Map antigens.  The cells proliferating upon exposure to Map antigens, in vitro, were evaluated by flow cytometry and found to be CD4+ T lymphocytes.  In addition, these cells were found to be the primary cell type producing IFN-gamma.  We have also titrated naive primary bovine monocyte-derived macrophages for their response to IFN-gamma in vitro.  We have developed assays for evaluating reactive nitrogen intermediates, reactive oxygen intermediates, and changes in the cellular morphology of macrophages in response to IFN-gamma.  This was a necessary first step in evaluating the ability of Map antigen-specific T cells to activate Map-infected bovine macrophages by the IFN-gamma secreted into their medium in vitro.
IMPACT: 2002/01 TO 2002/12  The inability to experimentally infect calves with Map has retarded progress in studying Johne's disease.  For the first time we are able to describe the length of time required for an antibody response, as well as a cell-mediated response, to develop.  In addition, we will have a reproducible and consistent source of antigen responsive T cells to use in determining their ability to activate Map infected macrophages.
PUBLICATIONS: 2002/01 TO 2002/12
No publications reported this period
PROJECT CONTACT:
     Name: Jones, D. E.  Phone: 515-294-4682.  Fax: 515-294-5423
     E
mail:
jonesdou@iastate.edu

 

PROJ TYPE: SPECIAL GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 99-34362-7580-S PROPOSAL NO: 2000-04007-S
START: 01 JUN 2000 TERM: 14 JUN 2002 FY: 2002 GRANT YR: 2000 GRANT AMT: $47,000
INVESTIGATOR: Thoen, C. O.; Cheville, N. F.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Mycobacterium avium subspecies paratuberculosis link to human Crohn’s's disease. NON-TECHNICAL SUMMARY: In some studies, Mycobacterium avium ss paratuberculosis, the causitive agent in Johne's disease in cattle, has been implicated in human Crohn’s's disease even though reviews of Johne's disease and its connection to human Crohn’s's have not established any connection.  The purpose of this research is to conduct a systematic investigation to determine the prevalence of Crohn’s's disease in herd owners and their families and to determine if Crohn’s's is more common in herd owners in which Johne's disease has been diagnosed.  The results will provide useful information on the occurrence of Crohn’s's disease in dairy cattle owners.
OBJECTIVES: Johne's disease is widespread in cattle herds in Iowa and the U.S.  The etiologic agent of Johne's disease, Mycobacterium avium ss paratuberculosis, has been associated with Crohn’s's disease in humans.  However, recently published information indicates little or no definitive information is available suggesting this agent is responsible for Crohn’s's disease.  No systemic investigations have been conducted to determine the prevalence of Crohn’s's disease in herd owners and their families in which Johne's disease has been diagnosed in their cattle herds.  Moreover, no studies have been made to determine if Crohn’s's is more common in herd owners in which Johne's disease has been diagnosed or in herd owners in which Johne's disease has not been diagnosed.  The results of this investigation will provide useful information on the occurrence of Crohn’s's disease in dairy cattle owners.  Specific objectives are to: 1) examine intestinal biopsy tissue from human Crohn’s's disease for evidence of infection by Mycobacterium avium subspecies paratuberculosis; and 2) obtain information on the occurrence of Crohn’s's disease in veterinarians and dairy producers. APPROACH:  The approach to achieve objectives 1 and 2 are as follows. For objective 1: We will use a retrospective study of a large acquisition base of human Crohn’s's disease to select samples of colonic lesions that show clear evidence of granulomas.  Tissue sections will be formalin-fixed, paraffin-embedded tissues processed by standard procedures used in medical pathology laboratories. Evidence of infection by mycobacteria will be revealed by immunostaining of mycobacterial antigens and detection of M.ptb DNA by PCR.  For objective 2: We will use a prospective study to obtain information on the occurrence of Crohn’s's disease in dairy herd owners and their families and veterinarians responsible for the health care of herds in which Johne's disease has been diagnosed. Questionnaires will be sent to 600 herd owners, 600 veterinarians and an equal number of controls. Findings will be tabulated and analyzed by appropriate statistical methods.
PROGRESS: 2000/06 TO 2002/06  Epidemilogic investigations involving cattle owners and veterinarians in 3 states responsible for the health care of herds in which Mycobacterium avium ss paratuberculosis was diagnosed failed to provide information suggesting an association with Crohn’s's disease in humans based on statistical methods employed.  Also, immunohistochemical analysis of intestinal tissues of patients with Crohn’s's disease failed to provide an association between Mycobacterium avium ss paratuberculosis and Crohn’s's disease in humans.
IMPACT: 2000/06 TO 2002/06  The findings fail to provide information on the possible association of Mycobacterium avium ss paratuberculosis in humans that are exposed or responsible for the care of cattle in herds in which Johne's disease has been diagnosed previously by mycobacteriologic examination of feces or tissues or by humoral antibody assays and/or immunologic assays.
PUBLICATIONS: 2000/06 TO 2002/06
No publications reported this period
PROJECT CONTACT:
     Name: Thoen, C. O.  Phone: 515-294-7609.  Fax: 515-294-8500
     E
mail:
cthoen@iastate.edu

 

PROJ TYPE: SPECIAL GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 99-34362-7555 PROPOSAL NO: 2000-04085
START: 15 JUN 1999 TERM: 14 JUN 2002 FY: 2002 GRANT YR: 2000 GRANT AMT: $46,000
INVESTIGATOR: Cheville, N. F.; Thoen, C. O.; Daniels, L.; Steadham, E. M.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Development and testing of deletion mutant vaccines for Johne's disease.
NON-TECHNICAL SUMMARY: Johne's disease is a leading cause of loss for the cattle industry.  Vaccines hold promise for prevention and control of Johne's disease but an efficacious commercial vaccine is not available.  By producing established mutant vaccine strains of Mycobacterium avium subspecies paratuberculosis and establishing that these strains are safe, efficacious and stable, will lead to commercialization of an improved vaccine against Johne's disease.  This knowledge may permit analyses of genetic resistance in animals with improved defense mechanisms.
OBJECTIVES: Johne's disease is ranked 1st or 2nd in priority by the beef and dairy cattle industries due to losses of production, lack of control, wide geographic distribution, restrictions placed on breeder herds and perceptions that the causal bacterium.  The long-range goal is to produce a vaccine that will prevent or control Johne's disease in cattle.  Objectives are: 1) Prepare genetic deletion mutants of Mycobacterium avium subspecies paratuberculosis that lack capacity to make NADP-dependent glucose-6-P dehydrogenase or F(sub 420)-dependent glucose-6-P dehydrogenase; 2) establish biosafety of vaccine candidates; 3) develop and test a vaccine product for efficacy in laboratory animals.
APPROACH: Objectives are: 1. Prepare genetic deletion mutants of Mycobacterium avium subspecies paratuberculosis that lack capacity to make NADP-dependent glucose-6-P dehydrogenase or F-dependent glucose-6-P dehydrogenase.  We have targeted oxidative stress agents and nitric oxide because they are produced by macrophages and are believed to kill bacteria within intracellular macrophage lysosomal systems.  We will create M.ptb mutants that lack specific enzymes that are likely to be important in protecting this bacterium from oxidative agents and will test virulence of the strains in an animal model.  2. Define uptake and intracellular trafficking and characteristics of genetic deletion mutant in vitro.  An in vitro invasion assay will be used to evaluate the adherence and uptake of M.ptb in a mouse macrophage cell line MH-S cultures.  The model also facilitates experimentation with agents that block receptor-mediated adherence and uptake or agents that interfere with intracellular survival of the bacteria.  3. Define virulence factors and pathogenesis of the vaccine strains of M.ptb in experimental animals is the major factor in biosafety.  Clinical signs of disease as a result of vaccination will be monitored by daily clinical examination of vaccinated animals.  Particular attention will be directed to elevation of body temperature, anorexia, lameness and anaphylaxis.  Detection of vaccine strains in the bloodstream, feces, nasal exudates, milk, tears, saliva and other body secretions will be done.
PROGRESS: 1999/06 TO 2002/06  In vitro (in macrophages) and in vivo (in mice and calves) test and assay protocols to establish the stability, biosafety and efficacy of vaccine candidate strains of M. avium ss. paratuberculosis (M.ptb) have been developed.  Growth of M.ptb in macrophages was examined to define characteristics of intracellular trafficking for exocytosis, replication, and antigen presentation.  Using immunocytochemical markers for light, confocal and electron microscopy, we have defined pathway tropism based on data for bacterial attachment, phagosomal acidification, phagolysosomal degradation and apoptosis.  Non-pathogenic strains of M.ptb were processed by exocytosis and avirulent mutant strains appear to be degraded and have preference for antigen processing pathways that involve transport vesicles bearing MHC2 antigens.  Pathogenicity in a nude mouse model of intestinal infection reveals lesion development and confirms pathway preferences of virulent strains for bacteriophorous vacuole formation.  Pathogenicity in newborn calves after subcutaneous injection at sites simulating vaccination has led to major studies of the role of interferon and interleukins in the immune response of cattle to M.ptb; preliminary data indicates that there are marked changes in development and release of interferon gamma in regional lymph nodes.  Mutants of M.ptb were prepared by using homologous recombination to create mutants that cannot make NADP-dependent glucose-6-P dehydrogenase or F420-dependent glucose-6-P dehydrogenase, both of which are expected to be important in responses to oxidative stress.  Both genes have been cloned and sequenced and one has been inserted into plasmids for knockout vectors; the mutants were produced by electrotransformation.  The mutants produced to date are unstable and studies are continuing to increase the stability of mutant M.ptb.
IMPACT: 1999/06 TO 2002/06  In vitro and in vivo models for testing and evaluation of avirulent (vaccine) strains of M.ptb have been developed.  Growth in macrophage cultures allows quantitation of intracellular traffiking through endosomal and lyposomal pathways.  Growth in mice using tissue morphology, cytokine induction, and other host responses permits definition of virulence characteristics.  The mutants produced to date are unstable and studies are continuing to increase the stability of mutant M.ptb.
PUBLICATIONS: 1999/06 TO 2002/06
1. Cheville NF, Hostetter J, Thomsen BV, Simutis F, Vanloubbeeck Y, Steadham E.  Intracellular trafficking of Mycobacterium avium ss. paratuberculosis in macrophages. Deutsch Tierarztl Wchnschr 108:236-243, 2001.
2. Thomsen BV, Steadham EM, Gallup JM, Ackermann, MR, Brees DJ, Cheville NF.  T-cell-dependent inducible nitric oxide synthase production and ultrastructural morphology in BALB/c mice infected with Mycobacterium avium subspecies paratuberculosis. J Comp Path 125:137-144, 2001.
3. Brees DJ, Reimer SB, Cheville NF, Florance A, Thoen CO. Immunohistochemical detection of Mycobacterium paratuberculosis in formalin-fixed, paraffin-embedded bovine tissue sections. J Vet Diagn Invest 12:60-63, 2000.
4. Hostetter JM, Steadham EM, Haynes JS, Bailey TB, Cheville NF. Phagosomal maturation and intracellular survival of Mycobacterium avium subspecies paratuberculosis in J774 cells. FEMS Immunol & Med Microbiol (submitted 2002).
5. Hostetter JM, Steadham EM, Haynes JS, Bailey TB, Cheville NF. Cytokine effects on maturation of the phagosomes containing Mycobacterim avium subspecies paratuberculosis in J774 cells. Comp Immunol, Microbiol & Inf Dis (submitted 2002).
6. Hostetter JM, Steadham EM, Haynes JS, Bailey TB, Cheville NF. Characterization of acidification of phagosomes containing Mycobacterium avium subspecies paratuberculosis in J774 cells. Clin Diagn Lab Immunol (submitted 2002).
7. Simutis F, Moore DG, Cheville NF, Jones DE. Gamma/delta T cell responses in Early Mycobacterium avium subspecies paratuberculosis infection. Proceedings of Am Soc Microbiol No. Z-31:138, 2002.
PROJECT CONTACT:
     Name: Cheville, N. F.  Phone: 515-294-0877
     E
mail:
nchevill@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 01 JUL 2002 TERM: 31 MAR 2005 FY: 2005
INVESTIGATOR: Simutis, F. J.; Jones, D. E.; Cheville, N. F.
PERFORMING INSTITUTION: Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Gamma-delta T cell function in mycobacterial infections.
NON-TECHNICAL SUMMARY: In search for more effective vaccines against pathogenic mycobacteria, the roles of the different lymphocyte subsets must be better understood in order to develop stimulatory components which lead to the most effective response by requisite subsets and, if necessary the downregulation of subsets which are ineffective or counterproductive.  The purpose of this research is to seek answers to the fundamental question of whether or not gamma-delta T cells respond to mycobacterial infection by activating infected macrophages.
OBJECTIVES: The functional role of gamma-delta T cells in controlling mycobacterial infection is presently unclear.  Recent work with Mycobacterium avium and M. avium subsp. paratuberculosis (Map) using gamma-delta T cell receptor knockout mice suggests a role for gamma-delta T cells in recruiting lymphocytes and neutrophils to the site of infection and in granuloma formation and organization.  While studies in knockout mice are essential for determining the contribution of gamma-delta T cells to the overall immune response to mycobacterial disease, studies evaluating the in vivo and in vitro functions of gamma-delta T cells in mycobacterial infection could best be accomplished using an animal that normally has large numbers of gamma-delta T cells present and is a natural host for the disease.  The bovine calf is an exceptional model for examining the responses of gamma-delta T cells as neonatal ruminants have large numbers of ciruculating gamma-delta T cells, comprising as much as 75 percent of the circulating T cell pool.  Preliminary data from a bovine model suggests a substantial role for gamma-delta T cells in macrophage activation and bactericidal activity during early infection of bovine calves with Map.  We have developed a bovine model of localized mycobacterial infection which permits the functional analysis of large numbers of antigen-responsive gamma-delta T cells during early mycobacterial infection.  In this model, neonatal calves are inoculated subcutaneously with a virulent strain of Map, the causative agent of ruminant paratuberculosis (Johne's disease) and a significant enteric pathogen of ruminant species worldwide.  Following experimental infection, the draining lymph node is surgically removed, and lymph node-derived mononuclear cells are isolated for proliferation and functional studies.  Specific aims of the project are: 1) Demonstrate that gamma-delta T cells are a predominant T cell subset that proliferates and produces IFN-gamma in early M. avium subsp. paratuberculosis infection; and 2) Test the hypothesis that antigen-specific gamma-delta T cells are capable of activating macrophages during early infections with M. avium subsp. paratuberculosis.
APPROACH: For specific aim 1: Preliminary data from our laboratoary regarding the immune response to subcutaneous inoculation with Map suggests substantial gamma-delta T cell proliferation with concomitant IFN-gamma production within the draining lymph node at post-inoculation day (PID) 60.  Although not ordinarily prominent within lymph nodes, gamma-delta T cells from the lymph node draining the site of local infection in half of the animals in our experiements proliferated more extensively in vitro than either CD4+ or CD8+ alpha-beta T cells from the same lymph node.  In the experiments we will examine antigen-specific gamma-delta T cell proliferation and IFN-gamma production in vitro using three-color flow cytometry, and we will use 5-bromo-2'-deoxyuridine (BrdU) incorporation as a marker of cellular proliferation for immunohistochemical studies in order to correlate our in vitro data with in vivo lymphoid changes within the draining lymph node.  For specific aim 2: Although there are reports of gamma-delta T cell-mediated increases in macrophage TNF-alpha production during exposure to lipopolysaccharide (LPS) and gamma-delta T cell regulation of nitric oxide production in experimental candidiasis, there are no published reports of macrophage activation by gamma-delta T cells during mycobacterial infection.  The function of gamma-delt T cells in the modulation of protective immunity against mycobacteria has not been established as beneficial, redundant, or deleterious.  In our model, bacteria are cleared from inoculation sites and draining lymph nodes before PID 60, which suggests that proliferating gamma-delta T cells activate macrophages to eliminate Map during early infection.  To test the hypothesis that antigen-specific gamma-delta T cells activate macrophages to upregulate mycobactericidal activity, we will compare the in vitro ability of gamma-delta T cells from Map-sensitized calves to activate autologous infected macrophages with the macrophage activation capability of thawed, cryopreserved autologous gamma-delta T cells obtained prior to experimental infection.
PROGRESS: 2003/01 TO 2003/12  We used a series of assays to test the hypothesis that gamma-delta T cells activate infected macrophages to kill intracellular Mycobacterium avium subsp. paratuberculosis (Map).  For these experiments, purified gamma-delta T cells were incubated with autologous Map-infected macrophages, bacterial killing was assessed, and macrophage activation was determined by measuring the production of bactericidal substances (nitric oxide and reactive oxygen species).  In addition, IFN-gamma (a mediator of macrophage activation produced by gamma-delta T cells) was quantified.  (1) Incubation of Map-infected macrophages with gamma-delta T cells reduces bacterial viability.  Bacterial viability was assessed by plating dilutions of lysed macrophage:gamma-delta T cell co-cultures onto 7H10 agar for mycobacteria.  Cultures of Map-infected macrophages incubated with unstimulated, autologous gamma-delta T cells or antigen-stimulated autologous gamma-delta T cells for 24 hours yielded 53.1 +/- 3.9% (mean +/- SE) and 51.5 +/- 11.8% fewer viable bacteria, respectively, compared to infected macrophages without added gamma-delta T cells.  These decreases in bacterial viability were statistically significant.  In contrast, treatment of infected macrophages with IFN-gamma and lipopolysaccharide, a combination known to activate macrophages, was ineffective at reducing bacterial viability.  (2) Nitrite concentrations within culture supernatants are not increased at 24 hours in Map-infected cultures containing gamma-delta T cells.  To indirectly test for nitric oxide production, we measured nitrite levels within supernatants of cultures of infected macrophages with and without added gamma-delta T cells.  24 hours after gamma-delta T cell transfer there were no significant increases in nitrites in infected cultures containing added gamma-delta T cells compared to infected macrophages alone (despite marked bacterial killing).  This finding was true of cultures from calves which had been previously exposed to Map and from control (uninfected) calves.  (3) Production of reactive oxygen species (ROS) by Map-infected macrophages is not induced by gamma-delta T cells.  Changes in nitroblue tetrazolium (NBT) reduction were followed by assessing the absorbance at 550 nm immediately after addition of NBT and again 18-24 hours later.  We measured the fold increases in A550 for macrophage cultures from four animals, and in all cases, there was no significant increase in NBT reduction by infected macrophage cultures containing added gamma-delta T cells compared to Map-infected macrophage cultures without added T cells. (4) gamma-delta T cells upregulate IFN-gamma production when cultured with Map-infected macrophages.  At 48 hours post-T cell transfer, infected macrophage cultures containing unstimulated gamma-delta T cells produced significantly greater IFN-gamma compared to infected macrophage cultures containing no added T cells.  Co-cultures containing antigen-stimulated gamma-delta T cells also produced increased IFN-gamma, but this increase was not statistically significant.  This production of IFN-gamma was true of calves which had been previously exposed to Map and control (uninfected) calves.
IMPACT: 2003/01 TO 2003/12  Purified gamma-delta T cells, whether rested for 7 days or stimulated with Map protein for 7 days, and from control or Map-inoculated calves, markedly reduced the viability of Map in macrophage cultures.  This finding is consistent with recent studies in which gamma-delta T cells have been shown to be bactericidal to mycobacteria in other experimental systems.  Killing of Map by gamma-delta T cells appears to be independent of nitric oxide and reactive oxygen species, known products of macrophage activation.
PUBLICATIONS: 2003/01 TO 2003/12
No publications reported this period
PROJECT CONTACT:
     Name: Simutis, F. J. Phone: 515-294-3282.  Fax: 515-294-5423
     E
mail:
fsimutis@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JUL 2001 TERM: 30 JUN 2003 FY: 2003
INVESTIGATOR: Jones, D. E.; Simutis, F. J.; Haynes, J. S.; Cheville, N. F.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Gamma delta T cell-mediated macrophage activation in Mycobacterium avium subsp. paratuberculosis infection in the neonatal calf model.
NON-TECHNICAL SUMMARY: Johne's disease is a chronic enteric infection of ruminants caused by intracellular infection of macrophages with Mycobacterium avium subsp. paratuberculosis.  The purpose of this research is to assess the ability of gamma delta T cells to activate macrophage bactericidal mechanisms in order to kill the bacteria.
OBJECTIVES: Paratuberculosis (Johne's disease) is a chronic enteric infection of ruminants caused by intracellular infection of macrophages with Mycobacterium avium subsp. paratuberculosis (M. a. ptb).  Livestock are infected as neonates when ingesting the organisms from a contaminated environment.  Diagnosis of subclinical carriers of M. a. ptb is difficult, and these carriers may shed massive numbers of organisms in feces and infect herdmates before a diagnosis is established.  Economic losses result from loss of production and culling of valuable animals.  Currently, only one vaccine is licensed for use in the U.S. for control of paratuberculosis, but field evidence suggests that the vaccine does not prevent transmission between animals.  In a preliminary study designed to develop a method for the rapid screening of genetically-altered strains of M. a. ptb. for use as live, avirulent vaccines in cattle, we have determined that a subset of lymphocytes, gamma delta (g-d) T cells, are stimulated in response to infection with wild-type M. a. ptb.  The precise function of gamma delta T cells in M. a. ptb. infection is unclear.  Our hypothesis is that these g-d T cells respond to infection by increasing bacterial killing mechanisms of macrophages infected with M. a. ptb. Specific aims are: 1) Demonstrate that g-d T cells are a predominant T cell subset that proliferates and produces IFN-gamma in early M. a. ptb. infection; and 2) test the hypothesis that antigen-specific g-d T cells are capable of activating macrophages during early infection with M. a. ptb.
APPROACH: While studies in knockout mice are essential for determining the contribution of g-d T cells to the overall immune response to mycobacterial disease, studies evaluating the in vivo and in vitro functions of g-d T cells in mycobacterial infection could best be accomplished using an animal that normally has large numbers of g-d T cells present and is a natural host for the disease.  The bovine calf is an exceptional model for examining the responses of g-d T cells, as neonatal ruminants have large numbers of circulating g-d T cells, comprising as much as 75% of circulating monocytes, and preliminary data from our laboratory suggests a role for T cells in macrophage activation and bactericidal activity during early infection of bovine calves with M. a. ptb.  We plan to test this hypothesis by infecting neonatal calves with a virulent stain of M. a. ptb., isolating g-d T cells from sites of local infection, and incubating these lymphocytes with newly-infected macrophages in vitro.  We will assess the ability of these g-d T cells to activate infected macrophages to kill intracellular M. a. ptb., and we predict that g-d T cells will be more effective at activating macrophage bactericidal mechanisms than are other lymphocyte subsets.  Recent work with M. avium and M. a. ptb. using g-d T cell receptor knockout mice suggests a role for g-d T cells in recruiting lymphocytes and neutrophils to the site of infection and in granuloma formation and organization.  For objective 2: To test this hypothesis, we will compare the in vitro ability of g-d T cells from M. a. ptb.-sensitized calves to activate autologous infected macrophages with the ability of naive g-d T to activate autologous infected macrophages.  We will examine antigen-specific g-d T cell proliferation and interferon-gamma (IFN-gamma) production in vitro using three-color flow cytometry.  Previous work with this model has shown that g-d T cell proliferation correlates with clearance of the organism from inoculation sites and draining lymph nodes before post-inoculation day 60.
PROGRESS: 2001/07 TO 2003/06  Proliferation and IFN-gamma studies.  At post-inoculation day (PID) 60, Mycobacterium avium subsp. paratuberculosis (Map)-inoculated calves, but not control calves, had antigen-specific lymph node mononuclear cell (LNMC) proliferation with a trend towards increased antigen-specific proliferation of CD4+, CD8+, and gamma-delta T cells compared to control animals.  Differences between Map-inoculated and control calves were not statistically significant at PID 0, 7, or 14.  No statistically-significant differences in IFN-gamma production by LNMC were detected between Map-inoculated and control calves.  Macrophage function in the presence of gamma-delta T cells.  We measured different aspects of macrophage function in order to assess their activation state in the presence and absence of gamma-delta T cells.  Macrophages were purified from peripheral blood based on the selective adherence of monocytes to plastic cultures plates.  Gamma-delta T cells were sorted from cultures of surgically excised lymph nodes (PID 0 and PID 60) using a magnetic-based cell separation system.  We evaluated three aspects of macrophage activation: production of reactive oxygen species (ROS), production of reactive nitrogen intermediates (RNI), and bactericidal activity.  Nitroblue tetrazolium (NBT) assay for ROS. In the presence of ROS, NBT is reduced to formazan, which forms an insoluble blue deposit.  Cultured macrophages in 96-well plates are incubated in a solution containing NBT, and the change in light absorbance at 550 nm is measured over time.  Phorbol ester-activated macrophage cultures have increased formazan deposition, and non-activated cultures have essentially no detectable formazan conversion.  In contrast to phorbol ester-stimulated control macrophage cultures, which had rapid formazan production within three hours, infected macrophage cultures containing PPD-stimulated or unstimulated gamma-delta T cells did not have detectible formazan production during the same time period.  Detection of nitrites in culture supernatants for indirect assessment of RNI.  Culture supernatants are mixed with an azo dye and a measurable color change results, the intensity of which is proportional to the amount of nitrite present.  Map-infected macrophage cultures containing purified gamma-delta T cells do not produce increased amounts of nitrites compared to infected macrophage cultures lacking gamma-delta T cells.  When co-cultured with uninfected macrophages, cultures containing purified gamma-delta T cells did not produce detectible nitrites.  Bacterial viability assay.  Following co-culture of infected macrophages and gamma-delta T cells, cultures were washed in 0.1% deoxycholate to lyse macrophages and release intracellular bacteria, diluted in sterile saline, and plated onto 7H10 agar plates.  We have observed marked decreases (50-90%) in the number of viable Map recovered from macrophage cultures containing gamma-delta T cells (both PPD-stimulated and unstimulated and from Map- and saline-inoculated calves), compared to unactivated macrophage cultures or macrophage cultures activated with IFN-gamma/LPS.
IMPACT: 2001/07 TO 2003/06   These studies support the hypothesis that gamma-delta T cell subtypes play a role during infection of cattle with Mycobacterium avium subsp. paratuberculosis.  Results of this work contribute to our understanding of the immune response of cattle to M. a. paratuberculosis infection and may aid in the design of future vaccines and diagnostic protocols for Johne's disease.
PUBLICATIONS: 2001/07 TO 2003/06
No publications reported this period
PROJECT CONTACT:
     Name: Jones, D. E.  Phone: 515-294-4682.  Fax: 515-294-5423
     E
mail:
jonesdou@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JUL 2001 TERM: 30 JUN 2003 FY: 2001
INVESTIGATOR: Thoen, C. O.; Nilsen-Hamilton, M.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Developing a new assay for detecting early stages of Johne's disease in cattle.
NON-TECHNICAL SUMMARY:  As of yet, there is no diagnostic test that will identify the existence of Johne's disease before clinical signs are evident.  The purpose of this study is to develop a new assay for early detection of this disease.
OBJECTIVES:  Johne's disesae, also known as paratuberculosis, is one of the four top-ranked diseases of dairy cattle in the U.S.  As yet, there is no test that can identify the existence of the disease until the animal has clinical disease.  The economic loss to the the dairy industry is estimated to be over $1.5 billion/year.  Culture examination of feces or tissues is the only means of confirming a diseased bovine and by this time, the bacteria are usually shed in large numbers and the risk of infection to the rest of the herd is significant.  Crohn’s's disease is a similar inflammatory disease in humans.  Although the cause of Johne's and Crohn’s's diseases may not be the same, the clinical presentation is similar.  Both diseases involve acute enteric inflammation with a significant period of latency before the development of clinical signs.  Recently it has been discovered that the protein product of a gene, neutrophil gelatinase associated lipocalin (NGAL) is highly expressed in human inflammatory bowel disease and Crohn’s's disease.  This expression has been measured in the feces and also in rectal dialyzates.  There is an excellent correlation between protein expression and inflammation even before clinical signs of the disease are evident.  The hypothesis for this study is that the expression of the bovine NGAL in the intestine is an early inflammatory response and can be used to detect initial inflammatory changes as Johne's disease begins to develop (subclinical stage - which can be up to 7 years).  Data from the human, mouse and rat show that increases in the expression of NGAL are large, varying from 10-200-fold over the controls depending on the extent of inflammation.  Specific objectives of this study are: 1) clone a fragment of the bovine NGAL cDNA by using RT-PCR amplification from an inflamed intestine of a Johne's diseased bovine; 2) screen bovine intestinal RNA samples by RT-PCR and Northern analysis to determine that the expression of bovine NGAL increases with enteric inflammation; 3) obtain a full-length bovine NGAL cDNA; and 4) express the bovine protein.
APPROACH: Total RNA will be isolated from a clinically diagnosed inflamed section of intestine of an animal with Johne's disease.  The RNA will be copied using reverse transcriptase and a poly T primer to make cDNA.  The cDNA will be amplified by PCR using partially degenerate primers that represent segments of the NGAL mRNA that is conserved over the species of human, mouse, rat and chicken.  The amplified fragment will be sequenced and used as a probe for interrogating a cDNA library from inflamed bovine gut.  Bovine cDNA clones that are about 70% or more identical to the other NGALs will be compared with each other to determine identity.  Once we have obtained and verified the sequence of the bovine NGAL cDNA, we will than develop a bacterial expression vector for this protein.  Based on these studies with the mouse, we expect to obtain high yields of bovine NGAL that can be easily purified for the purpose of producing antibodies.
PROGRESS: 2001/07 TO 2003/06  The investigations conducted failed to provide definitive information for identifying infection in the tissues.  However, research findings suggest further systematic investigations are necessary to elucidate the importance of changes detected in tissues examined.
IMPACT: 2001/07 TO 2003/06  Impact Johne's disease causes significant economic losses to cattle producers.  Early detection of cattle infected with Mycobacterium avium ss paratuberculosis is essential to control the spread of disease under natural condition.
PUBLICATIONS: 2001/07 TO 2003/06
No publications reported this period
PROJECT CONTACT:
     Name: Thoen, C. O.  Phone: 515-294-7608.  Fax: 515-294-8500
     E
mail:
cthoen@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 30 SEP 2005 TERM: 29 SEP 2006
INVESTIGATOR: Hostetter, J. M.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Development of flowmetrics assay.
NON-TECHNICAL SUMMARY: Situation: Currently our ablility to accurately diagnose Johne's disease in cattle is limited.  Effective implementation of Johne’s disease control programs will rely on more accurate diagnostic tools.  Purpose: This project will use a novel serologic assay for detection of M. paratuberculosis infected cattle at different stages of disease.  This assay would allow differentiation of cattle infection with M. paratuberculosis from other Mycobacterial species. OBJECTIVES: The overall purpose of this project is to develop a sensitive, reproducible, and rapid assay for the detection of M. paratuberculosis infection.  The objective of this proposal is to begin testing of a novel serological assay currently under development in our laboratory.  The assay we are developing utilizes recombinant proteins cloned from either M. bovis or M. avium paratuberculosis.  Significant advantages of this approach include the ability to multiplex the assay, the small volume of sample required, and the ability to evaluate large numbers of samples in a short period of time.  One of the critical aspects in controlling the impact of Johne’s disease in a herd is the ability to effectively detect infected animals and to accurately differentiate affected animals from those exposed to other mycobacterial species.  The potential of this assay to incorporate a panel of proteins unique for M. paratuberculosis as well as other mycobacterial pathogens, including M. bovis and M. avium, provides the opportunity to use serum antibodies to effectively screen cattle for exposure to these agents.  Recently, serum antibodies to M. paratuberculosis antigens have been detected as early as two weeks post infection.  These findings demonstrate that generation of serum antibodies to M. paratuberculosis is not limited to late in the disease course, and may have broad diagnostic potential (25).  We have two desired results from this proposal.  First, that we will be able to successfully detect M. paratuberculosis infection in the experimentally infected animals despite failure of commercial serum ELISA kits to detect circulating M. paratuberculosis antibody.  Second, that we will able to discriminate M. paratuberculosis infected cattle from M. bovis infected cattle.  The outcome of this project would be the basis for a novel diagnostic approach with increased sensitivity and specificity.  The utility of this fluorescent-based technology will allow for the simultaneous detection of as many as 50 different antigens in a single reaction tube by use of the Luminex 100 system.  The assay can be adapted to test for the presence of the agent or host antibody to specific antigens.  Because the assay can be performed in a microtiter plate format, hundreds to thousands of samples could be performed in a single day.  We expect that such an assay would greatly facilitate implementation of the VBJDCP through high versatility, increased confidence of test results, and ease of testing.
APPROACH: These proposed studies will use experimental M. avium subspecies paratuberculosis infection in cattle to evaluate the specificity and sensitivity of a novel flowmetrics-based assay as a method diagnostic tool.  Development of this assay is currently underway in our laboratory with support from the Iowa Livestock Health Advisory Council.  The approach is built upon advances in genomic analysis of mycobacterial pathogens including M. paratuberculosis and M. bovis and the availability of a more sensitive fluorescent-based technology that facilitates the ability to multiplex the detection method.  Recent genomic analysis of each organism has identified a series of proteins that are unique to each mycobacterial species and have been shown to be reactive with serum antibodies from infected cattle.  Proteins can be chosen that identify infected animals during the early stages of infection as well as the chronic stages of the disease.  The conjugation of specific protein antigens to fluorescent beads will permit the development of a multiplexed assay that has enhanced sensitivity and is differential, rapid, and cost effective for the serological diagnosis of Johne’s disease.
PROJECT CONTACT:
     Name: Hostetter, J. M.  Phone: 515-294-3282. Fax: 515-294-5423
     E
mail:
jesseh@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 01 JUL 2006 TERM: 30 JUN 2007
INVESTIGATOR: Hostetter, J. M.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Antigen discovery: screening for immunogenic potencial of recombinant proteins derived from Mycobacterium avium subspecies paratuberculosis.  
NON-TECHNICAL SUMMARY: One of the problems in the prevention of Johne's disease is that until a vaccine is designed that leads to reliable protection without compromising the specificity of tuberculosis and paratuberculosis skin testing; the use of immunization on a broad scale will likely remain impractical.  The currently approved vaccine is available only on a limited basis and has the potential to interfere with tuberculosis and paratuberculosis skin testing, thereby hindering its widespread application.  Implementation of an effective immunization strategy against Mycobacterium avium subspecies paratuberculosis (M. a. ptb) in combination with reliable diagnostic techniques would greatly enhance our ability to control and ultimately eradicate Johne's disease.
OBJECTIVES: Establish the immunogenicity of M. a. ptb proteins in vitro.
APPROACH: Dendritic cells are one of the initial cell types to interact with antigens at vaccination sites and their function is essential to development of protective immune responses.  Therefore, in this objective we will screen for immunogenic recombinant M. a. ptb proteins by identifying those that induce Th-1 polarizing DC function.  Our key approach will be to compare the ability of recombinant M. a. ptb protein pools with a whole bacterial sonicate to induce DC maturation and antigen presentation.  Initially two overlapping protein pools each consisting of 100 known proteins will be tested.  The first pool is composed of proteins derived from M. a. ptb surface membrane and the second composed of proteins that are unique to M. a. ptb.  Protein uptake will be confirmed by conjugating proteins with FITC and measuring FTIC positive DC by flow cytometry.  We will determine DC maturation phenotype by measuring expression of MHCI and MHCII by immunofluorescent labeling and flow cytometry.  We will measure gene expression of the co-stimulatory molecules CD40 and CD80 by Q-RT-PCR.  To determine cytokine profiles we will measure IL-10, IL-12 and TNF-a production in DC culture supernatants.  Using a mixed lymphocyte reaction (MLR), we will measure DC allostimulatory activity (T cell proliferation and IFN-. and/or IL-4 production) as a measure of antigen presentation ability.  We will measure DC allostimulatory activity (T cell proliferation and IFN-. and/or IL. We will define Th-1 polarizing activity as DC maturation (high CD40, CD80, MHCI, and MCHII), production of IL-12 and TNF-a, and induction of T cell proliferation and IFN-production.  With detection of immunogenicity, individual proteins will be serially subtracted from the pool.  In this fashion it will be possible to identify individual or groups of proteins that are strongly immunogenic.  Data evaluation and controls: For each parameter comparisons will be made for M. a. ptb recombinant protein pools with the whole bacterial sonicate.  Uptake of FITC labeled proteins and surface marker expression (MHCI, MHCII) will be expressed as mean fluorescent intensity of DC within gated regions.  Relative mRNA quantification (CD40, CD80) will be determined by calculating a ratio between target mRNA in DC to medium treated DC (calibrator).  The internal reference will be beta-actin mRNA.  The following calculation will be used to determine mRNA values: Fold change = Efficiency target.Ct (calibrator - target) / Efficiency reference.Ct (calibrator - target).  All samples will be run in triplicate. Cytokine production (IL-10, IL-12, TNF-a, IFN-.) will be expressed as ug/ml culture supernatant.  T cell proliferation will be expressed as a proliferation index as determined by Modfit software.  Negative controls will consist of DC incubated in medium alone.  Positive controls will consist of DC infected with live M. a. ptb then activated with LPS.  It is our experience that this combination strongly induces DC maturation and antigen presentation.  Statistical analysis: Normality and variance of the data will be assessed. PROJECT CONTACT:
     Name: Hostetter, J. M.  Phone: 515-294-3282. Fax: 515-294-5423
     E
mail:
jesseh@iastate.edu

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 01 JUL 2006 TERM: 30 JUN 2007
INVESTIGATOR: Thoen, C. O.
PERFORMING INSTITUTION:  Veterinary Medicine.  Iowa State University.  S. and 16th Elwood, Ames, Iowa 50011
SUBJECT:  Evaluation of reduced dosege [sic] of Mycopar (Mycobacterium paratuberculosis-heat killed cells in oil) for use to vaccinate calves in John [sic] Johne’s.
NON-TECHNICAL SUMMARY: Johne's disease is widespread in dairy and beef herds in the United States (9, 12).  Efforts to eradicate Johne's disease from cattle in herds in which MAP-infection persist using available diagnostic tests (ELISA and/or culture of feces) and slaughter have not often been successful.  Therefore, there has been an increased interest in the use of Mycopar to vaccinate calves in the control of Johne's disease (1). Available information shows that use of Mycopar as a vaccine usually eliminates the occurrence of clinical cases and markedly reduces or eliminates shedding of MAP in feces (2, 3, 4, 5).  Mycopar is effective in limiting the economic losses due to Johne's disease; however, a few animals may develop a softball size or larger swelling at the injection site in the brisket.  Usually only golf ball or baseball size swellings are observe at the injection site.  Although these swellings do not affect the market value of the animals, some producers and veterinarians are concerned about the appearance of larger swellings which may persist as long as the animal remains in the herd.  The large swellings that occur in cattle are believed to be related to the dosage of Mycopar vaccine used; therefore, there is a need to explore the use of reduced dosage of Mycopar to minimize or eliminate swellings at the injection site. OBJECTIVES: The objective is to determine the occurrence of injection site swellings in calves following the use of Mycopar at routine dosage (1 ml.) and in calves following the use of a reduced dosage (1/2 dose) of Mycopar in herds in which Johne's disease has been diagnosed by an organism based test (PCR or Culture).  In Phase I the objective is to determine if swellings induced by the use of Mycopar, (heat killed Mycobacterium paratuberculosis in oil), in calves can be minimized or eliminated by using a reduced dosage of Mycopar.  Injection sites will be observed and measured.  In Phase II the objective is to determine the shedding of MAP in feces of cattle in each of the three groups at 36, 48, and 60 months post vaccination and the occurrence of clinical disease during each year.
APPROACH: Twelve-hundred heifer calves 1 to 35 days of age in two or more herds negative on tuberculin skin test in which the incidence of MAP-infection in cows is estimated to be 20% or greater will be used in the investigation.  The calves will be divided into three groups of 400 calves per group.  A 20 gauge needle will be used in making injections and calves in each of the three groups will be inoculated within a 30 day time period.  Group I calves will be inoculated subcutaneously in the brisket with 1 ml of Mycopar.  This is the dose routinely used and approved for calves.  Group II calves will be inoculated with half of the dose of Mycopar in l ml at the same site.  Group III calves will be non-vaccinated controls and will be injected subcutaneously with 1 ml of mineral oil at the same site.  The injection site will be measured (cm) before administration of Mycopar or oil alone and at 4, 12, and 20 months post-injection.  Producers will be requested to note any swellings observed at other time intervals and to notify the Veterinary Practitioner at the time of herd health checks.  Fecal specimens will be collected at 20 months post-exposure for mycobacteriologic examination and processed as described in Laboratory Methods in Veterinary Mycobacteriology, NVSL, USDA.
PROJECT CONTACT:
     Name: Thoen, C. O. Phone: 515-294-7608.  Fax: 515-294-8500
     E
mail:
cthoen@iastate.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: TERMINATED
START: 01 OCT 2001 TERM: 30 SEP 2002 FY: 2002
INVESTIGATOR: Elzer, P. H.; Snider, T. R.; Enright, F. M.; Hoyt, P. G.; Roberts, C. S.
PERFORMING INSTITUTION:  PATHOBIOLOGICAL SCIENCES.  LOUISIANA STATE UNIVERSITY.  BATON ROUGE, LOUISIANA 70893
SUBJECT:  Development of Johne's disease in cattle.  
NON-TECHNICAL SUMMARY: When cattle are experimentally exposed to M. avium paratuberculosis, it may take from five months to ten years (most often two to three years) before the clinical symptoms associated with Johne's Disease are observed.  The goal of this project is to develop a research model for Johne's Disease in newborn calves.
OBJECTIVES: Newborn calves inoculated with the causative agent of Johne's Disease, M. avium paratuberculosis (virulent bovine isolate) should develop symptoms and intestinal lesions consistent with Johne's Disease within a six to 18 month period. Specific objectives: 1. To orally inoculate newborn calves (within 12 hrs of birth) with a virulent strain of M. avium paratuberculosis; 2. To monitor disease progression in these infected calves through a.  Culturing of organism from the feces on a weekly basis initially, then monthly b. Monitoring of animals for clinical symptom 1. Diarrhea 2. Weight loss 3. Lethargy c. Necropsies at specific times 1. Gross lesion development 2. Histological changes 3. PCR of tissues for M. avium paratuberculosis.  The measurement, examination, testing, and analysis of these parameters should accurately characterize Johne's Disease progression in cattle.
APPROACH: Twenty-one pregnant cattle will be obtained from a Johne's Disease-free herd.  The pregnant adults will be monitored until parturition. Within 12 to 18 hours after birth (prior to closure of intestine), the calves will be weighed and orally inoculated with 15-25 x 10e9 colony forming units (CFUs) of virulent Mycobacterium avium paratuberculosis or 1ml of sterile saline.  Following inoculation, the animals will be monitored daily for evidence of lethargy, diarrhea, anorexia, or any other clinical abnormalities.  Once a week, rectal temperature and weights will be recorded. When clinical symptoms develop, rectal temperature will be taken on a daily basis.  Fecal samples will also be collected weekly for bacterial culture for the first month and then monthly afterwards. A group of seven animals, five infected and two controls, will be humanely euthanized at nine, 12 and 18 months post-inoculation.  A complete necropsy will be performed and samples obtained from the stomach, duodenum, jejunum, ilieum, cecum, colon, mesenteric lymph nodes, internal iliac lymph nodes, liver, spleen, heart, lung, and brain.  Blood will also be collected at the time of necropsy. Samples from the gastrointestinal tract and mesenteric lymph nodes will be submitted for bacterial culture and polymerase chain reaction (PCR) analysis.  Sections from each organ will be fixed in 10% buffered formalin for histopathologic and ultrastructural evaluation.
PROGRESS: 2001/10 TO 2002/09  Mycobacterium avium paratuberculosis (MAP) is the causative agent of Johne's Disease in cattle.  The purpose of this project was to infect newborn calves with MAP imediately after birth (prior to closure) to facilitate infection of the calves.  Previous studies to date have used calves between 3-30 days of age and have had negative results (no detectable infection).  Another novel variable added to this experiment is that some of the groups received mycobactin, a compound which enhances the growth of MAP at the time of infection.  Presently 5 calves are infected with MAP alone, 4 with MAP + mycobactin and 3 with saline.  At 2, 4 and 6 months post infection, the calves will be necopsied and tissues will be collected for MAP culture and confirmation via histopahtology.
IMPACT: 2001/10 TO 2002/09  Once a research model for Johne's Disease in newborn Bovidae is established, the model can be used to test various vaccine canidates.  These vaccine candidates can be used to enhance herd health immunity against M. avium paratuberculosis, the causitive agent in Johne's Disease in cattle.
PUBLICATIONS: 2001/10 TO 2002/09
No publications reported this period
PROJECT CONTACT:
     Name: Elzer, P. H.  Phone: 225-578-4763.  Fax: 225-578-4890
     E
mail:
pelzer@agctr.lsu.edu

 

PROJ TYPE: SMALL BUSINESS GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2001-33610-10347 PROPOSAL NO: 2001-00161
START: 15 MAY 2001 TERM: 30 NOV 2002 GRANT YR: 2001 GRANT AMT: $70,000
INVESTIGATOR: Crabb, J. H.
PERFORMING INSTITUTION:  Immuncell Corporation. 56 Evergreen Dr. Portland, Maine 04103
SUBJECT:  Immunomagnetic separation assay for Mycobacterium paratuberculosis.
NON-TECHNICAL SUMMARY: Current testing for M. paratuberculosis in stool samples requires extensive sample preparation, including disinfection steps that reduce the sensitivity of culture. PCR testing of stool samples is hampered by inhibitors of the reaction present in stool.  The proposed IMS sample preparation method would provide increased sample throughput as well as enhanced sensitivity of detection by replacing the harsh sample preparation steps with a gentle, immune capture step to isolate the bacteria prior to culture or PCR.
OBJECTIVES: Johne's disease, caused by Mycobacterium paratuberculosis (M. para), is a chronic inflamatory bowel disease of ruminants.  Recent literature has fueled an as-yet unresolved debate about whether this organism is also the etiological agent of at least some proportion of Crohn’s's Disease in humans.  Detection of the organism in stool is difficult due to the slow growth and fastidious nature of M. para. hampering many of the studies of its pathogenesis and interfering with eradication efforts in cattle.  PCR-based detection of M para is highly specific, due to the presence of a unique sequence (IS900), but extensive sample preparation and PCR inhibitors in stool limit the sensitivity and utility of the method.
APPROACH: See Objectives.
PROJECT CONTACT:
     Name: Crabb, J. H.  Phone: 207-878-2770.  Fax: 207-878-2117
     E
mail:
jhcrabb@aol.com

 

PROJ TYPE: HATCH PROJ STATUS: TERMINATED
START: 01 AUG 2003 TERM: 31 DEC 2005 FY: 2005
INVESTIGATOR: Coussens, P. M.; Grooms, D.; Bolin, C.; Bolin, S.; Kuipel, M.; Barletta, R.
PERFORMING INSTITUTION:  Animal Science.  Michigan State Univ. East Lansing, Michigan 48824
SUBJECT:  Johne's disease pathogenesis and host response to Mycobacterium paratuberculosis.
NON-TECHNICAL SUMMARY: Johne's disease is a major concern in the US dairy industry.  There are currently no viable vaccines for Johne's disease and often diagnosis is highly problematic.  This project will benefit efforts to create vaccines and diagnostics for Johne's disease as well as provide a background of basic information on the bovine immune system.  It is anticipated that results from this project will also benefit studies on prevention and control of bovine tuberculosis and other infectious diseases.
OBJECTIVES: Our long-term objective relevant to the current project is to elucidate the complex interplay of immune cells and modulators that lead to peripheral and local immune responses in cattle infected with Mycobacterium avium subspecies paratuberculosis (MAP), the causative agent of Johne's disease in cattle.  Based on existing literature and preliminary results, one of our primary hypotheses is that MAP-specific and general immune suppression observed in clinically infected animals is at least partly due to specific suppressor cell populations that arise during the long subclinical phase of infection.  Specific Objectives (1) Correlate MAP stimulated changes in immune cell gene expression with immune cell population profiles using peripheral blood mononuclear cells (PBMCs) from cattle representing subclinical and clinical stages of MAP infection.  (2) Test the hypothesis that specific immune cell types are responsible for repressed gene expression in PBMCs from clinical Johne's disease cows in response to MAP.  (3) Correlate and contrast observations from peripheral immune cells with infected intestinal tissue and mesenteric lymph nodes from the same animals used in Objectives 1 and 2.  (4) Investigate interactions between MAP and bovine macrophages that lead to presistence of MAP in a cell designed to kill invading pathogens.
APPROACH: One hypothesis to explain gene expression differences between immune cells from Johne’s disease positive and control cows is that immune cell populations in infected and control cows are initially different.  A second, equally valid hypothesis is that MAP induces apoptosis in specific immune cell subsets thus leading to lower gene expression relative to controls.  To test and distinguish between these hypotheses, we will conduct a series of experiments comparing responses of PBMCs from infected and control cows to MAP, in which gene expression profiles are linked to cell distribution, measures of apoptosis, and immune cell proliferation.  We will also address the hypothesis that a particular immune cell type is responsible for quenching a rapid and vigorous response to MAP.  To test this hypothesis, we will use immunomagnetic separation with cell-type specific antibodies, removing specific cell types from PBMCs.  We will focus on the use of quantitative reverse transcriptase real-time polymerase chain reaction (Q-RT-PCR).  We will also examine differences between intestinal tissues and mesenteric lymph nodes from Johne's disease positive cows and similar tissues from control uninfected cows.  One specific hypothesis is that overexpression of IL-1 and TRAF 1 in clinical Johne’s disease has allowed cells in the intestinal lumen and mesenteric lymph nodes to adopt a survival phenotype by preventing apoptosis.  A second hypothesis to be tested is that, despite an apparent Th 2-like peripheral response in clinical cows, local sites and nodes from infected tissues retain a strong pro-inflammatory pattern of gene expression.  Data needed to test our specific hypotheses will be acquired using both Q-RT-PCR and cDNA microarray analysis.  We will extend our preliminary results to a larger pool of Johne’s disease positive cows and compare expression of key genes between control, subclinical, and clinical infected animals.  In addition, we will add a comparison of expression in mesenteric lymph nodes, not included in our original analysis.  Inhibition of phagosome-lysosome fusion by Mycobacteria appears to have two main components.  These components are: 1) preventing the phagosome from maturing into a phagolysosome through interruption of protein expression and/or trafficking and 2) avoidance of normal signaling through the Toll-like receptor (TLR) pathway.  Specific Objective 4 will address the first component by directly examining phagosomes in macrophages following phagocytosis of latex beads and E. coli and two Mycobacterium species.  Resting macrophages are used as a control in these studies, allowing us to also identify changes in gene expression and protein trafficking during the general processes of phagocytosis and activation.
PROGRESS: 2003/08 TO 2005/12  Our work during the past 12 months has focused on examining the effects of M. paratuberculosis on cultured bovine macrophages.  These studies were initiated because of prior results that showed M. paratuberculosis infected macrophages at sites of infection have dramatically enhanced levels of IL-1alpha and TRAF1 protein expression.  TRAF1 is a member of a protein family that is intricately involved in intracellular signaling, including activation of macrophages following contact with cytokines or activated T cells.  One hypothesis is that high levels of TRAF1 would inhibit signaling through TNF receptor superfamily members, including TNFR1, Fas, and TNFR2.  We have now demonstrated that in cultured macrophages, infection of cells with M. paratuberculosis indeed upregulates IL-1alpha and TRAF1 expression and that TRAF1 expression is dependent upon continued release of IL-1alpha.  These results suggest that drives high expression of TRAF1 in lesions from cattle with Johne’s disease is likely driven by IL-1alpha.  Importantly, uninfected macrophages newly recruited to sites of infection would be exposed to high levels of IL-1alpha and may thus be deficient in activation and signaling of T cells.  These studies will be continued under a recently warded USDA-NRI grant and designated as project number MICLO8369.
IMPACT: 2003/08 TO 2005/12  Results from this project suggested that M. paratuberculosis has profound effects on gene expression and possibly on intracellular signaling in infected macrophages. In addition, our results provided a foundation for understanding how M. paratuberculosis might interfere with the ability of macrophages to interact with T cells and to become activated following these interactons.
PUBLICATIONS: 2003/08 TO 2005/12
1. Aho, A.D., McNulty, A.M., and P.M. Coussens. (2003). Enhanced Expression of IL-1? and TRAF 1 in ileal tissues of cattle infected with Mycobacterium paratuberculosis. Infection and Immunity, 71(11), 6479-6486.
2. Coussens, P.M., N. Verman, M.A. Coussens, M.D. Elftman, and A.M. McNulty. (2004). Cytokine gene expression in peripheral blood mononuclear cells and tissues of cattle infected with Mycobacterium avium subspecies paratuberculosis: Evidence for an inherent pro-inflammatory gene expression pattern. Infection and Immunity, 72(3):1409-1422.
3. Tooker, B.C. and P.M. Coussens. (2004). Phagocytosis of M. paratuberculosis fails to activate expression of NADH dehydrogenase and nucleolin-related protein in bovine macrophages. FEMS Immunology Letters. 93: 137-142.
4. Coussens, P.M. 2004. A model for immune responses to Mycobacterium paratuberculosis. Infection and Immunity (Mini reviews), 72: 3089-3096.
PROJECT CONTACT:
     Name: Coussens, P. M.  Phone: 517-353-3158.  Fax: 517-353-1699
     E
mail:
coussens@msu.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 DEC 1998 TERM: 30 NOV 2003 FY: 2005
INVESTIGATOR: Lloyd, J.; Peterson, C.; Harsh, S.
PERFORMING INSTITUTION:  Agricultural Economics.  Michigan State Univ. 
East Lansing, Michigan 48824
SUBJECT:  Strategic management in agribusiness using key performance indicators.
OBJECTIVES: The objectives of this research are: 1)to define the awareness of, attitudes toward, and levels of adoption for formal strategic management in both the Michigan dairy industry and the veterinary profession, and 2) to identify the key performance indicators (KPI's) that are most useful for managing dairy farms and veterinary practices in a strategic management framework, based on firm-specific goals and objectives.
APPROACH: Preliminary data on both strategic management and KPIs will be collected through individual focus group meetings for dairy producers and practicing veterinarians.  Case studies of individual dairy farms and veterinary practices will also be employed to provide descriptive information on how to implement various strategic managment practices in real time.  Subsequently, surveys will be conducted to quantify the findings from the focus groups for both dairy producers and practicing veterinarians.  Collaborations will be developed with ongoing studies of both the dairy industry and the veternary profession to determine the strength of any potential correlation between strategic management and firm performance.  Beyond these econometric studies, computer models will be developed for both dairy farms and veterinary practices to evaluate potential changes in tactics for their possible impact on the KPIs of individual agribusinesses.
PROGRESS: 1998/12 TO 2003/11  The objectives of this research project were: 1) to define the awareness of attitudes toward, and levels of adoption for formal strategic management in both the Michigan dairy industry and the veterinary profession, and 2) to identify the key performance indicators (KPIs) that are most useful for managing dairy farms and veterinary practices in a strategic management framework, based on firm-specific goals and objectives.  As this project evolved over the course of its lifetime, the scope of work changed somewhat from the original intent.  During early consideration of strategic management in both the Michigan dairy industry and the veterinary profession, a strong need was encountered for a broader set of personal attributes to achieve effective leadership and management in the veterinary profession.  Subsequent research in this arena revealed a wide diversity of training programs across the Association of American Veterinary Colleges without any real consensus on educational content or approach.  This finding clearly signaled the need for development of standardized curriculum.  Results of this project also indicate that these non-technical skills, knowledge, aptitudes, and attitudes (SKAs) are not always effectively modeled in the veterinary teaching hospitals, and admission processes may, in effect, be screening out some of the desired characteristics.  A broad-based need for leadership skills has also been identified for the veterinary profession.  With regard to KPIs, project results have provided insight into strategic aspects of paratuberculosis, drug management, herd depopulation, culling and replacement, BST use, and management intensive grazing in the dairy industry.  Similarly, the strategic importance of starting salaries and debt loads of veterinary graduates, customer satisfaction, and pricing decisions have been addressed for the veterinary profession.
IMPACT: 1998/12 TO 2003/11  As a result of our work, Michigan dairy producers have a clearer picture of: the impact of paratuberculosis on production, reproduction and economic performance; dairy herd reproduction with BST use; determinants of drug management practices; reliability of on-farm, residue detection assays; risk factors for violative drug residues in milk; the potential impact of management intensive grazing on profitability and economic efficiencies; and the financial aspects of herd depopulation, culling and replacement selection, and BST use.  To the extent that these findings are being used, dairy production should be more efficient, profitable, and sustainable as a result.  In addition, the impacts of the veterinary medical profession on the State of Michigan are more fully understood, as are both the KPIs used in managing veterinary practices and the teaching and research needs related to non-clinical skills, knowledge, aptitudes, and attitudes (SKAs) in the veterinary profession.  Our demonstration projects and applied research have sensitized the veterinary profession to the applicability and utility of conducting applied market research in a strategic management framework.  Further, this project has made it apparent that enhanced veterinary teaching hospital management, veterinary school admissions processes, and veterinary leadership development programs are needed.  Across the veterinary profession, curricula and research priorities related to SKAs, teaching hospital management, admissions, and leadership are currently being scrutinized based, in large part, on our work.
PUBLICATIONS: 1998/12 TO 2003/11
No publications reported this period

 

PROJ TYPE: STATE PROJ STATUS: REVISED
START: 01 OCT 2005 TERM: 30 SEP 2010 FY: 2005
INVESTIGATOR: Coussens, P. M.; Kuipel, M.
PERFORMING INSTITUTION:  Animal Science.  Michigan State Univ.  East Lansing, Michigan 48824
SUBJECT:  Immune modulation and gene expression signatures associated with infection of cattle with M. partuberculosis.
NON-TECHNICAL SUMMARY: A. Johne's disease, caused by M. paratuberculosis, is one of the most costly infectious disease problems in the US dairy herd.  A. This project will enhance knowledge on how M. paratuberculosis survives in macrophage cells and how infected cells interact with other components of the immune system.  B. This project will also be the first demonstration of using gene expression profiling to diagnose an infection in domestic species.
OBJECTIVES: I. We will conduct In vitro work on the effect of M. paratuberculosis (MAP) on macrophage signaling, activation, and T cell interactions.  These studies include: 1) Examination of the relationship between MAP infection and expression of IL-1alpha, TRAF1, and TRAF2 in cultured monocyte derived macrophages (MDM).  2) Determination of the effect of MAP infection and IL-1alpha treatment on CD40-CD154 and TNFalpha signaling in MDM.  3) We will determine the effect of MAP infection on interactions between MDM and autologous activated T cells.  4) We will Investigate the effect of MAP infection on susceptibility/resistance to apoptosis in MDM. II.  We will work to Develop an infection signature for diagnosis of MAP and to aid understanding of MAP effects on the peripheral immune system.  To accomplish this, we will: 1) Complete Q-RT-PCR mediated validation of 45 potential MAP infection signature genes on a cohort of 150 infected cattle and 50 controls.  2) We will complete statistical analysis of the Q-RT-PCR data and look for correlations between gene expression differences and infection parameters assessed by various standard diagnostic tests.  We will also attempt to correlate immune tests (serum ELISA, IFN? test results, and fecal culture) with gene expression events.  3) Finally, we will extend our gene expression signature work to other pathogens, including Brucella abortus, M. bovis, BVDV and BLV.
APPROACH: Specific Objective 1: Ontology of TRAF1 and IL-1alpha mRNA and protein expression in MDM infected with MAP.  Monocyte-derived macrophages (MDM) prepared from 4 different cows will be infected with MAP in vitro.  Uninfected MDM will serve as a negative controls.  Infected and uninfected MDM will be collected at various times post-infection.  Cultures will be harvested for RNA and protein at each time point.  TRAF1, TRAF2, and IL-1alpha mRNA expression at each time point will be assessed by Q-RT-PCR.  Relationship between IL-1alpha expression and TRAF1 upregulation.  Uninfected MDM from 4 cows will be treated with rIL-1alpha in the presence and absence of an excess of IL-1 receptor antagonist (IL-1Ra) for 24 hours.  Cells will be harvested for mRNA and protein analysis.  TRAF1 and TRAF2 gene expression and protein content will be analyzed by Q-RT-PCR and western blotting.  MDM from 4 cows will be infected with MAP in the presence and absence of IL-1Ra. Lysates will be collected at 0, 0.5, 1, 3, 6, 12, 24, 48, and 72 hours following exposure to MAP.  Expression of TRAF1 mRNA and protein will again be monitored.  Establish the relationship between TRAF1 and TRAF2 in MAP infected MDM.  Protein extracts from MAP infected and IL-1alpha treated MDM will be used to examine the composition of TRAF1/TRAF2 complexes by immunoprecipitation pull-down coupled with western blotting.  Specific Objective 2: Determine the effect of MAP infection and TRAF1 overexpression on CD40 signaling in MDM.  First, CD154-CD40 mediated activation of NFkB in MDM will be assayed.  Second, we will directly examine activation of IKK, a regulator of NFkB.  Third, expression of IL-10, IL-12p35, IL-12p40, TNFalpha, MIP-1alpha and production of nitric oxide will be monitored by Q-RT-PCR in control and MAP infected MDM.  Specific Objective 3: Interaction of autologous T cells with MAP infected macrophages.  Cultures of MDM from all cows will be infected with MAP at a MOI of 5 to 10 and allowed to settle.  Fresh PBMCs will be prepared from each cow and stimulated with MAP antigens in vitro, with general mitogens, or without antigen stimulation for 24 hours.  Following stimulation, autologous T cells will be isolated using magnetic cell sorting.  Isolated T cells will be fixed and applied to autologous infected or control MDM and allowed to interact for 4 to 24 hours.  Macrophage activation parameters to be assayed include production of IFN?, IL-10, IL-12p35, IL-12p40, TNFalpha, MIP-1alpha, and IL-1alpha mRNA by Q-RT-PCR.  Specific Objective 1: Evaluate and validate a previously determined subset of 45 host immune response genes by Q-RT-PCR for diagnosis of M. paratuberculosis infection in populations of 150 subclinical infected and 50 control cattle.  Preliminary data, clearly indicates that inherent gene expression profiles in immune cells from M. paratuberculosis infected cows is different than profiles in cells from control cows.  We have now selected 45 of the most significantly differentially expressed genes for validation and testing in a large group of infected and control cows using high-throughput Q-RT-PCR.
PROGRESS: 2005/01 TO 2005/12  We have completed running 15 BOTL-5 microarrays where gene expression patterns in total leukocytes of cattle infected with M. paratuberculosis (MAP) are compared to patterns from total leukocytes from control healthy cattle.  This data has been normalized and analyzed to reveal an initial gene expression pattern or signature associated with MAP infection.  Portions of this study have been published by our laboratory and by our Danish collaborators.  We have identified 5 dairy herds where the MAP infection status of each cow is known and have begun collecting samples from these cows.  In each case, serum ELISA and IFN-gamma response is re-checked and tracked along with any fecal culture results obtained previously.  Samples are coded by herd and animal number for future reference and correlation estimates.  For each cow, RNA has been prepared from approximately 5 X 10E9 total leukocytes and has been stored prior to Q-RT-PCR analysis.  For signature validation, we have selected 45 genes from the microarray results and 3 control genes (beta-actin, GAPDH, and RPL-19).  Primers have been desined fo ra subset of these and primer validation is in progress.  Ultimately, we will use 150 infected cows and 50 controls in the validation study.
IMPACT: 2005/01 TO 2005/12  Results of this project will provide a host (cattle) gene expression signature diagnostic for infection with M. paratuberculosis (Johne’s disease).  It will be possible to design a simple and rapid test based on quantitative real time PCR of total blood leukocytes diagnostic for M. paratuberculosis infection.  Additional knowkledge about the immune response to M. paratuberculosis infection in cattle will aid vaccine development efforts.
PUBLICATIONS: 2005/01 TO 2005/12
1. Coussens, P.M., C. B. Pudrith, X. Ren, S. P. Suchyta, J. R. Stabel, K. Skovgaard, and P. M.H. Heegaard. 2005. Johne’s disease in cattle is associated with enhanced expression of genes encoding IL-5, GATA-3, tissue inhibitors of matrix metalloproteinases 1 and 2, and factors promoting apoptosis in peripheral blood mononuclear cells. Veterinary Immunology and Immunopathology. 105: 221-234.
2. K. Skovgaard, C.B. Pudrith, P.M.H. Heegaard, S. Nedergaard-Grell, G. Jungersen1, and P.M. Coussens. 2005. Differential expression of genes encoding CD30L and P-selectin in cattle with Johne’s disease: Progress toward a diagnostic gene expression signature. Veterinary Immunology and Immunopathology, In Press.
PROJECT CONTACT:
     Name: Coussens, P. M.  Phone: 517-353-3158.  Fax: 517-353-1699
     E
mail:
coussens@msu.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: TERMINATED
START: 01 OCT 2000 TERM: 30 SEP 2005 FY: 2005
INVESTIGATOR: Coussens, P.; Burton, J.
PERFORMING INSTITUTION: Animal Science. Michigan State Univ. East Lansing, Michigan 48824
SUBJECT:  Dynamics of immune responses to Johne's disease in infected and vaccinated calves.
NON-TECHNICAL SUMMARY: Johne's disease is a chronic infection in cattle that is untreatable with conventional antibiotics and ultimately leads to death.  The immune response to M. paratuberculosis, the causative agent of Johne's disease, is poorly understood, though recent progress has begun to define parameters that might affect the susceptability of various animals to disease.  This project will help to further define the response of cattle to infection with M. paratuberculosis.  This information [sic] is critical to control programs and development of successful vaccines.
OBJECTIVES: The Molecular Pathogenesis Laboratory, Department of Animal Science at MSU is dedicated to understanding the relationship between host immune response and microbial associated pathogenesis in animals.  Mycobacterial infections are responsible for major diseases of most animals, including humans.  Mycobacteria hide within cells of the immune system (macrophages) and appear to direct host responses away from beneficial cell mediated immunity towards an ineffective production of antibody and a harmful chronic inflammatory response.  The long-term objective addressed by work presented in this project is to help unravel some of the host immune events in infection of cattle with M. paratuberculosis, the causative agent of Johne's disease.  Our specific objectives under this project are to: 1) Establish groups of Holstein calves that have been vaccinated with killed M. paratuberculosis, experimentally infected with live M. paratuberculosis, and control animals free of contact with M. paratuberculosis.  2) Monitor the response of various lymphocyte subsets to M. paratuberculosis antigens at weekly or biweekly intervals following vaccination or infection and 3) Determine the Th-1 and Th-2 cytokine profiles of lymphocytes and lymphocyte subsets following vaccination or infection.
APPROACH: Holstein calves will be vaccinated or experimentally infected with M. paratuberculosis (5 per group).  Two additional calves will be held under similar conditions in a separate room to serve as controls.  Following a 4 day acclimation period, initial blood samples will be drawn as a baseline for cell population, proliferation, and serology studies.  Five calves will be infected with 2 gm wet weight of live M. paratuberculosis using gastric tubing.  Five additional calves, housed separately, will be vaccinated with 400mg wet weight of killed M. paratuberculosis suspended in 1 ml of mineral oil.  At 14 days post initial vaccination, animals will be given booster injections of 200mg sonicated M. paratuberculosis in the brisket and 200mg intradermally in the neck.  Intragastric dosing of the infection group will also be repeated at this time.  Blood samples from all animals will be collected at least once weekly following infection or vaccination and analyzed as described below.  Fecal samples will be collected on a weekly basis from each animal and used to assay for presence of M. paratuberculosis by polymerase chain reaction (PCR) as well as by direct culture.  Animals will be maintained for at least 10 months following treatment.  Our proposed experimental design will allow a direct comparison of vaccination and experimental infection.  This is necessary since M. paratuberculosis lives in, and can have profound effects on, bovine macrophages.  Macrophages are an essential component of the immune system, expressing a number of cytokines that can affect and even direct the resulting immune response.  Vaccination would not necessarily have the same effect on this important cell population as would infection with viable M. paratuberculosis.  Cell subsets will be monitored by fluorescence activated flow-cytometric analysis using commercially available antibodies directed against subset specific cell-surface markers.  These makers are: CD4 (GC50A1); CD8 (CACT80C); IgM (B-cells); CD2 (all T-cells); and the gd-T cell marker N2 (BAQ4A). Cell subsets will be visualized using FITC conjugated secondary antibodies appropriate to the primary antibody type.  To monitor cells proliferating in response to M. paratuberculosis antigens, we will employ a non-radioactive balstogenesis assay system (Chemicon International) based on cleavage of tetrazolium salt WST-1 (TZ-WST-1) to formazan by mitochondrial enzymes.  Cytokine profiles of cells in response to M. paratuberculosis antigens will be analyzed from cells prepared as described above and incubated with M. paratuberculosis antigens for 24 hours under similar conditions.  Cytokine profiles will be examined using quantitative competitive RT-PCR.  Specific cytokines to be monitored include: Th-1 cytokines (IL-1, IL-2, IL-6, IFN-gamma, and IL-12); and Th-2 cytokines (IL-4, IL-5, and IL-10).
PROGRESS: 2000/10 TO 2005/09  This study began in an effort to identify host immune cell genes that respond to M. paratuberculosis antigens in naturally infected cows.  In addition, we were interested in examining the gene expression patterns in intestinal tissues and mesenteric lymph nodes from infected cows versus patterns observed in uninfected controls.  During the course of these studies, we completed a number of cDNA microarray studies that compared gene expression patterns in peripheral blood mononuclear cells (PBMCs) from M. paratuberculosis infected cows (Johne’s disease positive) following stimulation with antigens from M. paratuberculosis.  Gene expression patterns in intestinal tissues and lymph nodes were also examined by cDNA microarray.  In addition, we completed a large-scale analysis of cytokine gene expression in PBMCs, gut lymph tissue, and lesions from cows with Johne’s disease.  For the microarray studies, we investigated the effect of antigen stimulation over time and compared the effect of antigen stimulation between cells from infected cows and healthy controls.  These studies led to the surprising conclusion that stimulation with antigen was not necessary to detect gene expression differences in PBMCs from Johne’s disease positive cows and healthy controls.  These studies have also led to many novel observations regarding the immune response to M. paratuberculosis and have indicated that novel genes, such as CIDE-A, MMP9, and MMP23 are important in immune responses to M. paratuberculosis.  In addition, our results confirmed earlier observations that suggested that the cytokine IL-10 was important in immune responses to M. paratuberculosis.  In fact, IL-10 was one of the few cytokine genes to be consistently activated by antigen stimulation of PBMCs when monitored by quantitative real time PCR (Q-RT-PCR).  Our results in these areas were recently summarized and published as a review that established a new model for understanding immune responses to M. paratuberculosis. IMPACT: 2000/10 TO 2005/09Our gene expression profiling work has led to identification of numerous new targets for diagnosis of M. paratuberculosis infection in cattle.  Continuation of this work proceeds using high-throughput Q-RT-PCR under funding from USDA-APHIS.  In addition, our work has also identified IL-10 as one of the important cytokines produced by immune cells in response to M. paratuberculosis stimulation and has led to the hypothesis that regulatory T cells develop over the course of infection.  This discovery is likely to impact current diagnostics, including IFN-gamma test and has implications for vaccine development.
PUBLICATIONS: 2000/10 TO 2005/09
1. Coussens, P. M., (2001). Interactions between Mycobacterium paratuberculosis and the bovine immune system, Animal Health Research Reviews 2, 141-161.
2. Yao, J., Burton, J. L., Saama, P., Sipkovsky, S., and Coussens, P. M., (2001). Generation of EST and cDNA microarray resources for the study of bovine immunolobiology, Acta Vet Skandivica 42, 391-406.
3. Coussens, P. M., and Nobis, W., (2002). Bioinformatics and high-throughput approach to create genomic resources for study of bovine immunobiology, Veterinary Immunology and Immunopathology 86: 229-244
4. Coussens, P.M., C.J. Colvin, K. Wiersma, A. Abouzied, and S. Sipkovsky (2002). Gene expression rofiling of peripheral blood mononuclear cells from cattle infected with M. paratuberculosis. Infection and Immunity 70: 5494-5502.
5. Coussens, P.M, Colvin, C.H., Rosa, G., Perez Laspuir, J., and M. Elftman. (2003). Evidence for a novel gene expression program in peripheral blood mononuclear cells from M. paratuberculosis infected cattle. Infection and Immunity. 71(11), 6487-6498.
6. Aho, A.D., McNulty, A.M., and P.M. Coussens. (2003). Enhanced expression of IL-1alpha and TRAF 1 in ileal tissues of cattle infected with Mycobacterium paratuberculosis.  Infection and Immunity, 71(11), 6479-6486.
7. Coussens, P.M., A. Jeffers, and C.J. Colvin. (2003). Rapid and transient activation of gene expression in peripheral blood mononuclear cells of Johne’s disease positive cows exposed to Mycobacterium paratuberculosis in vitro. Microbial Pathogenesis. 36(2):93-108
8. Coussens, P.M., N. Verman, M.A. Coussens, M.D. Elftman, and A.M. McNulty. (2004). Cytokine gene expression in peripheral blood mononuclear cells and tissues of cattle infected with Mycobacterium avium subspecies paratuberculosis: Evidence for an inherent pro-inflammatory gene Expression pattern. Infection and Immunity, 72(3):1409-1422.
9. Coussens, P.M. 2004. A model for immune responses to Mycobacterium paratuberculosis. Infection and Immunity (Mini reviews), 72: 3089-3096.
10. Coussens, P.M., C. B. Pudrith, X. Ren, S. P. Suchyta, J. R. Stabel, K. Skovgaard, and P. M.H. Heegaard. 2005. Johne’s disease in cattle is associated with enhanced expression of genes encoding IL-5, GATA-3, tissue inhibitors of matrix metalloproteinases 1 and 2, and factors promoting apoptosis in peripheral blood mononuclear cells. Veterinary Immunology and Immunopathology. 105: 221-234.
PROJECT CONTACT:
     Name: Coussens, P. M.  Phone: 517-353-3158.  Fax: 517-353-1699
     E
mail:
coussens@msu.edu

 

PROJ TYPE: SPECIAL GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 2001-34427-10444 PROPOSAL NO: 2001-03570
START: 01 JUL 2001 TERM: 30 JUN 2004 FY: 2004 GRANT YR: 2001 GRANT AMT: $303,339
INVESTIGATOR: Kaneene, J. B.; Fitzgerald, S. D.; Bartlett, P. C.; Griffore, F.; Bolin, S.; Bolin, C.
PERFORMING INSTITUTION:  Population Medicine Center.  Michigan State Univ East Lansing, Michigan 48824
SUBJECT:  Epidemiology and risk analysis of Mycobacterium bovis in wild and domestic animals in Michigan.
NON-TECHNICAL SUMMARY: Bovine tuberculosis (TB) in Michigan is being recognized as more prevalent in wildlife and livestock than originally thought.  We have seen bovine TB in beef and dairy cattle and in a number of wildlife species.  The current combination of active and passive surveillance programs, as well as control and eradication efforts, have shown that more research is needed to provide information needed to deal with the problem.  The first focus of these projects is to identify factors that will influence whether a cattle herd will develop TB.  Next, these projects will look at the effectiveness of tests used to detect TB in cattle.  Finally, the projects will look at the impact of bovine TB on farm families and communities in the TB-affected area.
OBJECTIVES: Specific objectives are to: 1) conduct epidemiological studies to determine major risk factors influencing TB transmission in livestock and deer, 2) refine and validate preliminary risk analysis models, 3) evaluate the effect of M. paratuberculosis status on the reliability of the CFT in cattle, 4) use new risk analysis approaches to estimate the rate of false positives on the CFT and CCT, 5) determine whether wild rodents are possible TB reservoirs, and 6) determine the social impact of bovine TB on farm families and farm communities.
APPROACH: Objective 1: A retrospective epidemiological study will examine the association between M. bovis infection and physical landscape factors.  Environmental samples will be taken from livestock operations with confirmed M. bovis infections and processed for bacterial isolation, identification, and typing.  A cross-sectional study will identify different wildlife species with bovine TB, determine the most likely routes of infection for each species, and estimate the potential of each species to be hosts for M. bovis by describing pathogenicity and assessing the possibility of shedding through different routes.  A retrospective epidemiological analysis will be conducted to examine the association between the occurrence of M. bovis on farms with M. bovis in deer, deer-related supplemental feeding, and physical landscape factors.  Objective 2: A stochastic simulation model, using cattle herd factors, deer factors, deer feeding factors, and land use factors, will be developed to estimate the risk of a dairy or beef cattle herd developing TB infection in a year.  Objective 3: From dairy herds in the Michigan Johne's Control Program, three herds will be selected: one high prevalence herd (> 15%); one low prevalence herd (< 2%); and one Johne's-free herd.  Each animal will receive a bovine TB caudal fold test, comparative cervical test, and gamma-interferon tests, and TB test results will be compared by Johne's disease status.  Objective 4: A database and data entry template for infected Michigan cattle herds will be developed for CFT and CCT data.  Risk analysis software will be used to generate frequency distributions of tuberculosis prevalence in different sub-populations of domestic ruminants.  Risk analysis software will be used to generate frequency distributions of rates of false positives and negatives, and true positives and negatives, from the Michigan TB testing program for livestock.  Objective 5: M. bovis of deer-origin from Michigan will be used to inoculate prairie voles by oral gavage and intranasal installation.  Groups of oral-inoculated, nasal-inoculated, and control rodents will be euthanized at days 30 and 60 post-inoculation.  Necropsies, histopathology, acid-fast staining and mycobacterial isolation will be evaluated for rodent susceptibility to infection with M. bovis and ability to shed the organism.  Objective 6: Followup interviews with farm families affected by bovine TB in northeastern Michigan will be conducted to examine patterns of adaptive behavior and long-term impact of bovine TB on farm families.  Families with new TB herds, and farmers in the area who have not yet been directly affected by TB will be interviewed.  Interviews have been conducted with members of various stakeholder groups, and a subset of these interviewees will be contacted to aid in clarification of the results.  A public opinion survey will collect attitudes about the Michigan TB situation from key personnel in state-level agricultural and natural resource agencies across the US.  Data collected by the questionnaire will be evaluated to assess respondents' reactions to the TB situation and areas where additional information or education are needed.
PROGRESS: 2001/07 TO 2004/06  The first aim of this project was to determine the spatial relationships of bovine TB (bTB) in white-tailed deer, relating to factors in the physical landscape and location-specific human activity.  Spatial clusters of TB were detected in areas that encourage deer to congregate for long periods of time.  One paper has been submitted for publication.  To identify factors that may influence whether a cattle herd will develop TB, a matched case-control study of herds was conducted to identify herd management factors and environmental conditions associated with TB (Kaneene et al., 2002).  A stochastic risk assessment model for herd TB status was developed, based on results of this study, and has been integrated with economic data to create a management tool to develop recommendations to reduce the TB risk for individual cattle farms.  The on-farm program is undergoing field testing.  The study on the effect of Johne’s disease (JD) on the caudal fold tuberculin test (CFT) in herds without TB was completed and submitted for publication.  Fecal culture and antibody ELISA for M. avium ssp. paratuberculosis, were performed on cattle from 10 herds.  Blood samples were taken and subjected to gamma-interferon (GI) tests for M. bovis and JD.  Cattle positive for JD by fecal culture, ELISA, or GI appear to be more likely to be false + on CFT than were negative cattle, and no associations were found between + fecal culture or ELISA with GI for M. bovis.  To determine the effectiveness of current TB testing in Michigan cattle, cattle from TB-infected herds were examined by gross necropsy, histopathologic exam, mycobacterial culture, and PCR.  Bayesian inference was used to estimate the sensitivity and specificity of the CFT and comparative cervical tuberculin test (CCT) using two-population-two-tests latent-class models. Bayesian estimates of the sensitivity and specificity of the CFT and CCT were 85 and 94%, and 76 and 99%, respectively, which agrees with reports from other studies in the U.S.  Two papers have been submitted for publication.  To evaluate the role of rodents as possible reservoirs of M. bovis, an experimental study was conducted to study the relative susceptibility of 'wild-type' rodents to inoculation with M. bovis by the oral and intranasal routes.  M. bovis was cultured from the feces of 9 oral inoculates and 8 intranasal inoculates on day 1 post-inoculation, and from fecal samples of 3 intranasal inoculates at day 30 post-inoculation, and also from pooled tissue samples.  Results of this study are being prepared for publication.  In-person interviews were conducted with farm families to measure the social impacts of bTB, and study findings indicate that families can adapt to the changes imposed by the presence of TB on their farms, but they experienced problems in receiving information in a timely fashion, and inconsistency and inequity in the application of government policies and procedures.  To lessen negative impacts, families should be accorded more attention and consideration when policies are made, and should have a more substantial role in decision-making as it relates to their own farms.  Two manuscripts are being submitted for publication.
IMPACT: 2001/07 TO 2004/06  Control and eradication of TB from the Michigan livestock industry requires an understanding of the disease and how it spreads, efficient disease detection methods, and the development of tools for control of the disease at the farm level.  Risk assessment models can be used to develop sound, cost-effective disease control programs.  The reliability of the caudal fold skin test, used for TB testing in livestock, may be affected by an animal's disease or vaccination status.  These factors should be taken into consideration when interpreting TB skin test results, or designing a TB surveillance program.  Current TB tests require great time, effort and expense, and false results are common with existing skin and blood tests.  Even with TB lesions, many times associated with acid-fast bacilli, bacteria cannot be cultured because of poor samples, freeze-thaw, or lack of available fresh tissues.  New DNA-based testing methods (cDNA microarray analysis of gene expression and laser-capture microscopy for isolating DNA for PCR) have the potential to become rapid, sensitive methods to identify TB in tissue samples in an efficient and reliable way. With a better understanding of the stresses and social impacts of bovine TB on Michigan farm families, programs can be designed to reduce the negative impact of TB control and surveillance programs on families' lives.
PUBLICATIONS: 2001/07 TO 2004/06
1. Dunn, J.R., Kaneene, J.B., Grooms, D.L., Bolin, S.R., Bolin, C.A., Bruning-Fann, C.S. Testing positive for Mycobacterium avium subsp. paratuberculosis and the lack of significant effect on the caudal fold tuberculin (CFT) and gamma interferon tests for bovine tuberculosis. Am J Vet Res, accepted for publication 2004.
2. Fitzgerald, S.D., Boland, K.G., Clarke, K.R., Wismer, A., Kaneene, J.B., Berry, D.E., Church, S.V., Hattey, J.A., C.A. Bolin. Experimental inoculation of mallard ducks (Anas platyrhynchos) with Mycobacterium bovis. Avian Dis. submitted 2004.
3. Griffore, R., Phenice, L. The impact of bovine TB on the farm family ecosystem. In preparation for submission to Family Relations, 2004.
4. Griffore, R., Phenice, L; Kaneene, J.B. Veterinarians:  A complex role of mediation between the state and farm families. In preparation for submission to Journal of the American Veterinary Medical Association, 2004.
5. Miller, R., Kaneene, J.B., Schmitt, S.M., Lusch, D.P., Fitzgerald, S.D. Geographic distribution and spatial analysis of Mycobacterium bovis infection in white-tailed deer (Odocoileus virginianus) in Michigan. Prev Vet Med. accepted 2004.
6. Norby, B., Bartlett, P.C., Fitzgerald, S.D., Granger, L., Bruning-Fann, C., Whipple, D.L., J.B. Payeur. The sensitivity of gross necropsy, caudal fold and comparative cervical tests for the diagnosis of bovine tuberculosis. J Vet Diagn Invest. 16:126-131, 2004.
7. Norby, B., Bartlett, P.C., Grooms, D.L., Kaneene, J.B., Bruning-Fann, C.S. Herd-level sensitivity, specificity, and predictive values of bovine tuberculosis skin tests in Michigan. Am J Vet Res. submitted 2004.
8. Norby, B. Tempelman, R.J., Hansonc, T.E., Kaneene, J.B., Bartlett, P.C. Estimation of sensitivity and specificity of bovine tuberculosis skin tests in Michigan when a perfect reference test is not available. Prev Vet Med. submitted 2004.
9. O'Brien, D.J., Schmitt, S.M., Berry, D.E., Fitzgerald, S.D., Vanneste, J.R., Lyon, T.J., Church, S.V., Fierke, J.S., Schooley, A.M., Cooley, T.M., Magsig, D., Zwick, L., and B.V. Thomsen: Estimating the true prevalence of M. bovis in hunter-harvested white-tailed deer in Michigan. J Wildl Dis. 40:42-52, 2004.
PROJECT CONTACT:
     Name: Kaneene, J. B.  Phone: 517-353-5941.  Fax: 517-432-0976
     E
mail:
kaneene@cvm.msu.edu

 

PROJ TYPE: SPECIAL GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 2002-34427-11829 PROPOSAL NO: 2002-06051
START: 01 SEP 2002 TERM: 31 AUG 2004 FY: 2005 GRANT YR: 2002 GRANT AMT: $297,445
INVESTIGATOR: Kaneene, J. B.; Fitzgerald, D. D.; Bolin, S. R.; Bartlett, P. C.;
Bolin, C. A.
PERFORMING INSTITUTION:  Population Medicine Center.  Michigan State Univ.  East Lansing, Michigan 48824
SUBJECT:  Bovine tuberculosis: epidemiology, diagnosis, and pathogenesis.
NON-TECHNICAL SUMMARY: Since bovine TB control programs for livestock have significant costs, there is a need to improve the performance of these programs.  The proposed research will evaluate the costs of current TB control programs, the reliability of TB tests being used, and factors that influence the effectiveness of these programs.  In addition, the study will try to identify new, more efficient methods of identifying bovine TB in cattle.
OBJECTIVES: There are six projects with specific objectives: Project 1 Objective: to develop a predictive risk assessment model, combining epidemiological and economic risk factors, for the effects of bovine TB infection on the Michigan cattle industry; Project 2 Objectives: 1) determine the sensitivity, specificity and predictive values and reliability of the CFT and the gamma-interferon blood test in Johne's-positive cattle herds, using the comparative cervical skin test (CCT) and mycobacterial culture for validation; 2) compare results of the CFT from Johne's-positive cattle with results from Johne's-negative cattle, using the CCT and mycobacterial culture for validation; and 3) to determine if cattle with advanced Johne's Disease are immunologically competent to respond appropriately to M. bovis antigens; Project 3 Objectives: 1) study the relative susceptibility of wild-type rodents to oral inoculation with M. bovis; 2) attempt to isolate M. bovis from inoculated rodents through fecal culture at multiple times post-inoculation, and from various organs at necropsy; 3) evaluate various tissues microscopically at multiple times post-inoculation to understand the pathogenesis of M. bovis in these rodents; and 4) evaluate rodents for the threat they pose in re-introduction of M. bovis to cattle farms, and their potential as sentinel species for infection on farms; Project 4 Objectives: 1) construct probability distributions of the prevalence of bovine TB in different sub-populations of Michigan domestic ruminants; 2) construct probability distributions of the false and true positives and false and true negatives resulting from the current serial testing (CFT/CCT) program in Michigan; and 3) estimate the rates of human injuries and deaths suffered during the bovine TB testing program in Michigan; Project 5 Objectives: 1) identify altered gene expression for bovine cytokines in cattle sensitized to M. bovis, using lymphocytes stimulated in vitro with purified protein derivative (PPD) from M. bovis or M. avium; and 2) identify additional genes from bovine lymphocytes that show altered expression attributable to exposure with M. bovis, using a cDNA microarray made from bovine lymphocytes and mRNA from lymphocytes stimulated in vitro with PPD from M. bovis or M. avium.
APPROACH: Project 1: Herd-based risk assessment models and models of TB in wild white-tailed deer in northeastern Michigan will be used to develop industry-level predictive models of levels of TB and its economic consequences to the state's cattle industry, so that the impact of herd-level or industry-level TB control measures, and their attendant costs, can be projected over periods of time and be used to determine which measures would be most efficient and cost-effective for the industry.  Project 2: Objectives 1 & 2: To test effect of Johne's Disease (JD) on the caudal fold and comparative cervical skin tests and the gamma-interferon test for Mycobacterium bovis, cattle from dairy herds with no/low/high levels of JD will have TB skin tests administered.  Blood and fecal samples will be collected to compare animal JD status (by fecal culture, ELISA and gamma-interferon for M. paratuberculosis) with results of TB skin tests and gamma-interferon testing.  Objective 3: TB-negative cattle with and without JD will be injected with killed M. bovis antigen in a dose response study to compare the immune response of cattle with and without JD to respond to the M. bovis antigen.  Project 3:Norway rats and wild rodents will be orally inoculated with high and low doses of M. bovis, with some sham-inoculated controls.  Fecal cultures and body weights will be collected throughout the study.  Groups will be euthanatized at different intervals, and results of gross necropsy, histopathology, acid-fast staining and bacterial culture will be assessed.  Project 4: Objectives 1 & 2: Probabilistic risk assessment models will be developed to assess the prevalence of bovine TB on cattle operations in Michigan.  Risk analysis software will be used to generate frequency distributions of rates of false-positives and -negatives from the Michigan TB livestock testing program.  Objective 3: A survey on worker injuries will be administered to a random sample of the veterinarians involved with TB testing.  Project 5: Objective 1: Whole blood will be collected from calves sensitized to M. bovis, and stimulated by incubation with PPD made from M. bovis or M. avium. Lymphocytes will be harvested and total cellular RNA will be obtained.  RT-PCR and a real-time PCR detection system will be used to monitor up- and down-regulation, and altered product-ratios for bovine cytokines.  Results from sensitized cattle will be compared to results from animals with natural infection.  Objective2: Available cDNA microarrays made from bovine lymphocytes will be used to identify genes that are up-regulated or down-regulated after in vitro exposure of lymphocytes with either M. bovis or proteins derived from M. bovis.  Total cellular RNA will be harvested from lymphocytes after stimulation with antigen, and reverse transcribed using an oligo (dT)15 primer to incorporate aminoallyl-modified dUTP into the single strand product.  The fluorescent-labeled probe cDNAs will be hybridized to microarrays, the microarrays will be washed several times, dried, and scanned to create reports of spot intensity ratios to identify genes that have altered levels of expression.
PROGRESS: 2002/09 TO 2004/08  Project 1: A stochastic risk assessment model for herd TB status was developed, based on results from a case-control study to identify herd management factors and environmental conditions associated with TB status.  A method to examine trade-offs between expected benefits and expected costs of biosecurity management practices and investments was developed.  The model is being updated with additional data from over 10 new TB-positive herds, and is being implemented in a form for on-farm use.  Project 2: A prospective study was designed to determine if cattle infected with Mycobacterium avium subsp. paratuberculosis (JD) have a higher proportion of false positive caudal fold tuberculin test (CFT) results for TB when compared to uninfected cattle.  Blood and fecal samples from 1043 cattle were subjected to M. bovis and M. avium gamma-interferon (INF-gamma) and JD antibody ELISA testing, and fecal culture.  The overall false positive rate on the CFT was 17%.  The high (>15%) and low (<15%) prevalence herds averaged 21 and 14% positive on the CFT, respectively, and 32 and 19% of JD positive (+) cows from high and low prevalence herds, respectively, were CFT positive.  These results indicate an association between JD disease and false positive CFT.  Project 3: The experimental infection study of wild house mice was completed, and mice were found to be highly susceptible to M. bovis and may pose a real threat to infected farms that are depopulated and later repopulated.  The final analysis, combining results of several studies, shows that voles were the most susceptible to infection, mice were highly susceptible, and rats being highly resistant to both infection and shedding.  A manuscript for publication comparing and summarizing these findings is in preparation.  Project 4:  The sensitivities of the CFT, CFT and comparative cervical tests (CCT) in series, and gross necropsy were 93, 88, and 86%, respectively.  Sensitivities of skin tests were slightly higher when at least 2 lesions were found at gross necropsy.  If 1 TB+ animal is enough to declare a herd TB+ and the tests used to classify a single animal as TB+ has a specificity of 1.0, the herd level performance of the TB skin tests in Michigan is very good.  When prevalence is low, herd level sensitivity is correlated with TB prevalence and the size of the tested herd.  Herd negative predictive value is very high and decreases slightly when herd size decreases.  These results show that attention should be paid to smaller herds to meet the goal of TB eradication.  Project 5: Whole blood from 5 false-positive CCT reactors, 1 lesion+ animal, 1 INF-gamma reactor, and 1 cow sensitized with sensitinogen was stimulated with bovine PPD before harvest of total cellular RNA for determination of levels of cytokine gene expression compared with levels of 2 housekeeping genes.  There was an increase in gene expression for 6 cytokines and INF-gamma, and decreased expression of IL-4 in the CCT reactors.  The lesion+ animal showed an increase in expression of TNF-alpha, and IL-10 or INF-gamma.  Additional RNA has been collected for further study, from a TB positive herd and a negative herd located outside of the TB endemic area.
IMPACT: 2002/09 TO 2004/08  Control and eradication of TB from the Michigan livestock industry requires an understanding of the disease and how it spreads, efficient disease detection methods, and the development of tools for control of the disease at the farm level.  Risk assessment models can be used to develop sound, cost-effective disease control programs.  The reliability of the caudal fold skin test, used for TB testing in livestock, may be affected by an animal's disease or vaccination status.  These factors should be taken into consideration when interpreting TB skin test results, or designing a TB surveillance program.  Current TB tests require great time, effort and expense, and false results are common with existing skin and blood tests.  Even with TB lesions, many times associated with acid-fast bacilli, bacteria cannot be cultured because of poor samples, freeze-thaw, or lack of available fresh tissues.  New DNA-based testing methods (cDNA microarray analysis of gene expression and laser-capture microscopy for isolating DNA for PCR) have the potential to become rapid, sensitive methods to identify TB in tissue samples in an efficient and reliable way. Determining what wildlife species can serve as reservoirs of M. bovis is fundamental to understanding the epidemiology of TB, which is necessary to develop effective disease eradication programs
PUBLICATIONS: 2002/09 TO 2004/08
No publications reported this period
PROJECT CONTACT:
     Name: Kaneene, J. B.  Phone: 517-353-5941.  Fax: 517-432-0976
     E
mail:
kaneene@cvm.msu.edu

 

PROJ TYPE: SPECIAL GRANT PROJ STATUS: EXTENDED
CONTRACT/GRANT/AGREEMENT NO: 2003-34427-13292 PROPOSAL NO: 2003-06030
START: 01 JUL 2003 TERM: 30 JUN 2006 FY: 2005 GRANT YR: 2003 GRANT AMT: $323,193
INVESTIGATOR: Kaneene, J. B.; Fitzgerald, S. D.; Grooms, D.; Bolin, S. R.; Bolin, C. A.; Wolf, C. A.; Fine, A.
PERFORMING INSTITUTION:  Large Animal Clinical Sciences.  Michigan State Univ.  East Lansing, Michigan 48824
SUBJECT:  Bovine tuberculosis: epidemiology, diagnosis, and pathogenesis.  
NON-TECHNICAL SUMMARY: Since bovine TB control programs for livestock have significant costs, there is a need to improve the performance of these programs.  The proposed research will evaluate the costs of current TB control programs, the reliability of TB tests being used, and factors that influence the effectiveness of these programs.  In addition, the study will try to identify new, more efficient methods of identifying bovine TB in cattle.
OBJECTIVES: There are four projects with specific objectives.  Project 1 Objectives: 1) to validate the epidemiological and economic risk assessment models for a cattle herd becoming infected with bovine tuberculosis; and 2) develop a user-friendly software package to predict a herd's risk for the bovine tuberculosis, and estimate the costs associated with changing management practices identified as contributing to the herd risk for bovine tuberculosis.  Project 2 Objectives: 1) determine the level of association between false positive rates in the caudal fold skin tests and levels of M. paratuberculosis infection in the cattle herd; 2) determine the incidence of M. paratuberculosis infection in cattle that are classified as suspects or reactors by the comparative cervical tuberculin test; 3) determine whether the administration of a vaccine containing a modified-live bovine viral diarrhea virus changes the response to the caudal fold tuberculin test or a-interferon test for bovine tuberculosis; and 4) determine whether the administration of a new L. borgpetersenii serovar Hardjo bacterin changes the response to the caudal fold tuberculin test or a-interferon test for bovine tuberculosis.  Project 3 Objectives: 1) compare patterns of gene expression in WBC RNA from comparative cervical suspects or reactors from tuberculosis free herds, and cattle naturally infected with M. bovis; 2) optimize the DNA extraction process and the PCR reaction conditions to increase the sensitivity for detection of M. bovis in lesions that lack observable acid fast organisms; 3) develop and standardize DNA extraction and PCR techniques for detection of M. bovis in known positive animal tissues; 4) compare the sensitivity and specificity of this new technique to existing PCR on formalin-fixed tissue techniques; and 5) determine the utility of this new technique for wildlife and domestic animal tuberculosis surveillance, as well as experimental inoculation study application.  Project 4 Objectives: 1) use bacteriologic culture and DNA-based testing techniques to identify M. bovis in environmental substrates from TB-affected cattle farms and areas with identified clusters of TB-infected white-tailed deer; 2) assess the effect of environmental conditions (humidity, temperature, and light) on the probability and duration of M. bovis survival in the environment; 3) study the relative susceptibility of mallard ducks to oral and intra-tracheal inoculation with M. bovis and attempt to isolate M. bovis from inoculated birds through fecal culture at multiple times post-inoculation, and from various organs at necrospy; 4) evaluate various tissues microscopically at multiple times post-inoculation to understand the pathogenesis of M. bovis in these birds; and 5) evaluate wild bird species for the threat they pose in re-introduction of M. bovis to cattle farms. APPROACH: Project 1: Herd-based risk assessment models and economic models of TB in cattle herds in northeastern Michigan will be used to develop predictive models for a herd's risk for TB and its economic consequences, so that the impact and costs of herd-level TB control measures can be projected over periods of time and be used to determine which measures would be most efficient and cost-effective.  Project 2: Objectives 1-2: Cattle from dairy herds with no/low/high levels of Johne's Disease (JD) will receive caudal fold skin tests (CFT).  Blood and feces will be collected to compare animal JD status with results of CFT and a-interferon testing.  Objective 3: Calves free of BVDV will be sensitized to M. bovis, vaccinated with a modified-live virus vaccine containing attenuated BVDV, bovine herpesvirus-1, bovine respiratory syncytial virus, and parainfluenza-3.  The CFT will be given after vaccination, and comparisons made between vaccinated and unvaccinated calves.  Objective 4: Calves free of Leptospira will be sensitized to M. bovis, vaccinated with a monovalent serovar Hardjo vaccine, and given CFTs after vaccination. Comparisons will be made between CFT results from sensitized and unsensitized calves. Project 3: Objectives 1-2: Whole blood collected from calves sensitized to M. bovis will be stimulated with M. bovis or M. avium PPD to obtain total cellular RNA.  RT-PCR and real-time PCR will monitor up- and down-regulation, and altered product-ratios for bovine cytokines.  Available cDNA microarrays made from bovine lymphocytes will be used to identify genes that are up- or down-regulated after in vitro exposure of lymphocytes with M. bovis or proteins derived from M. bovis.  Objectives 3-5: Extraction of DNA and PCR will be used on sections of formalin fixed, paraffin embedded tissue with microscopic lesions consistent with TB.  A laser capture microsdissection system will be used to dissect out microscopic granulomatous lesions for capture using HS Caps, DNA will be extracted, and real-time PCR will be conducted.  Project 4: Objective 1: Soil, hay, and water samples will be inoculated with M. bovis. Processed samples will be analyzed for the presence of M. bovis by culture and PCR, and the most efficient method for processing environmental samples will be determined.  Objectives 2-3: Locations on TB-infected cattle farms will be identified and samples of feces, feeds, open water, and pasture grass will be taken.  Similar samples will be taken from sites in areas with high TB-prevalence in wildlife. Analysis for M. bovis will be done by culture, DNA probe, and IS6110 primer-based PCR.  Objectives 3-5: Mallard ducks will be orally inoculated with high and low doses of M. bovis, with some sham-inoculated controls.  Fecal cultures and body weights will be collected throughout the study.  Groups will be euthanatized at different intervals, and results of gross necropsy, histopathology, acid-fast staining and bacterial culture will be evaluated.
PROGRESS: 2005/01 TO 2005/12  Project 1: The test version of a user-friendly software package to predict herd risk for TB, identify conditions on the farm associated with increasing TB risk, and estimate the economic costs associated with changing management practices identified as contributing to the herd risk for TB for on-farm use has been completed and is undergoing field-testing.  A predictive risk assessment model for a cattle herd becoming reinfected with TB after depopulation is being developed.  Project 2: Field work for this project was completed in August 2005. 2 groups of 20 cattle were injected with sensitinogen, and then vaccinated with commercially available modified live-virus (BVDV, bovine herpesvirus 1, BRSV, parainfluenza virus) or inactivated Leptospira interrogans serovar hardjo vaccines.  At 72 hrs post-vaccination, the CFT test was administered and blood obtained for the whole blood gamma interferon assay.  Results indicate that CFT response was reduced but not eliminated after vaccination.  The gamma interferon response was reduced but not eliminated if blood was stimulated within 2 hrs of collection.  Shipping conditions and time had a negative effect on the gamma interferon response.  Project 3: Results of cDNA microarray analysis on white blood cells from cattle infected with M. avium ssp. paratuberculosis were used to guide selection of gene targets for quantitative PCR.  Blood was obtained from 5 CCT suspect/reactor cattle, 2 TB+ cattle, and 1 cow sensitized to M. bovis.  Considerable variation in altered gene expression was noted following stimulation with antigen, and work is continuing.  DNA extraction and PCR techniques for detection of mycobacteria in known TB+ animal tissues have been standardized and were used on formalin-fixed paraffin-embedded tissues from 198 cattle.  These techniques were successful for mycobacteria that have established methods (M. avium, M. avium ssp. paratuberculosis), and methods for M. bovis are currently being developed.  Project 4: Methods for processing environmental samples for M. bovis isolation have been established and validation studies indicate that these methods are capable of detecting small numbers of M. bovis.  M. bovis was not widely distributed or present in large numbers in environmental substrates collected on TB-affected cattle farms, and has not be isolated from any samples (soil, water, feed) collected from 11 TB-affected cattle farms and 4 wildlife areas with known TB.  Molecular techniques are planned to study any isolates found.  Preliminary data from a study designed to determine the effect of substrate type (water, soil, hay, grain) and environmental conditions (humidity, temperature, sunlight) on the persistence of viable M. bovis bacteria in the environment suggest that viable M. bovis can persist for 4 weeks.  Data indicate that M. bovis can survive in environmental substrates for sufficient lengths of time to serve as a source of infection for cattle and/or wild deer.  Mallard ducks are highly resistant to oral infection with TB, and do not shed the organism in feces.  This continues a series of experimental studies in wild birds, and papers covering this research have been published.
IMPACT: 2005/01 TO 2005/12  Control and eradication of TB from the Michigan livestock industry requires an understanding of the disease and how it spreads, efficient disease detection methods, and the development of tools for control of the disease at the farm level.  Risk assessment models can be used to develop sound, cost-effective disease control programs.  The reliability of the caudal fold skin test, used for TB testing in livestock, may be affected by animal disease or vaccination status.  These factors should be taken into consideration when interpreting TB skin test results, or designing a TB surveillance program.  Current TB tests require great time, effort and expense, and false results are common with existing skin and blood tests.  Even with TB lesions, many times associated with acid-fast bacilli, bacteria cannot be cultured because of poor samples, freeze-thaw, or lack of available fresh tissues.  New DNA-based testing methods (cDNA microarray analysis of gene expression and laser-capture microscopy for isolating DNA for PCR) have the potential to become rapid, sensitive methods to identify TB in tissue samples in an efficient and reliable way.  Determining where in the environment and ecosystem M. bovis exists, and the length of time it survives and remains infective, is fundamental to understanding the epidemiology of TB, which is necessary to develop effective disease eradication programs.  Experiments have shown that some wild bird species may contribution to the maintenance and spread of TB in wildlife and livestock.
PUBLICATIONS: 2005/01 TO 2005/12
Fitzgerald, S.D., Boland, K.G., Clarke, K.R., Wismer, A., Kaneene, J.B., Church, D.E., Hattey, S.V., Bolin, C.A.  Resistance of mallard ducks (Anas platyrhynchos) to experimental inoculation with Mycobacterium bovis. Avian Dis., 49:144-146, 2005.
PROJECT CONTACT:
     Name: Kaneene, J. B.  Phone: 517-353-5941.  Fax: 517-432-0976
     E
mail:
kaneene@cvm.msu.edu

 

PROJ TYPE: SPECIAL GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2004-34427-14585 PROPOSAL NO: 2004-06033
START: 01 SEP 2004 TERM: 31 AUG 2006 FY: 2005 GRANT YR: 2004 GRANT AMT: $288,804
INVESTIGATOR: Kaneene, J. B.; Fitzgerald, S. D.; Bolin, S. R.; Grooms, D. L.; Bolin, C. A.
PERFORMING INSTITUTION:  Large Animal Clinical Sciences.  Michigan State Univ.  East Lansing, Michigan 48824
SUBJECT:  Bovine tuberculosis: epidemiology, diagnosis, and pathogenesis.
NON-TECHNICAL SUMMARY: Since bovine TB control and prevention programs for livestock have significant costs, there is a need to improve the performance of these programs.  The proposed research will evaluate current TB control and prevention programs, the reliability of TB tests being used, factors that influence the effectiveness of these tests and programs, and the efficacy of two TB vaccines for animals.
OBJECTIVES: There are four projects with specific objectives. Project 1 Objectives: 1) Identify risk factors associated with reacquiring TB after repopulation, including factors associated with herd biosecurity, cattle movement to and from affected herds, cattle feeding practices, cattle housing, and wildlife access to livestock and livestock feed; 2) Evaluate the spatial relationship between risk for reacquiring TB and proximity to other herds affected by TB, deer habitat, surface water features, and other ecological features in the region; and 3) Determine association between herd TB status and herd-related management factors, geographic location of environmental conditions, proximity to TB positive herds, levels of TB in deer.  Project 2 Objectives: 1) Determine the level of association between false positive rates in the caudal fold skin tests (CFT) and levels of M. paratuberculosis infection in the cattle herd; and 2) Determine the prevalence of M. paratuberculosis infection in cattle that are classified as suspects or reactors by the comparative cervical tuberculin test (CCT); 3) determine whether the administration of a vaccine containing a modified-live bovine viral diarrhea virus changes the response to the caudal fold tuberculin test or gamma interferon test for bovine tuberculosis; 4) determine whether the administration of a new L. borgpetersenii serovar Hardjo bacterin changes the response to the caudal fold tuberculin test or gamma-interferon test for bovine tuberculosis; 5) Retrospectively apply PCR to formalin-fixed, paraffin-embedded sections of ileum and determine the prevalence of M. paratuberculosis infected cattle that falsely test as suspects or reactors by 1) the CFT, 2) the CCT, and 3) cattle that are skin test negative; and 6) Compare resulting prevalences of false reactors by the two skin tests with the negative test population as a negative control to determine effect of Johne’s infection on test results.  Project 3 Objectives: 1) Identify targets of altered gene expression after 0, 1, 2, 4 or 20 hours of antigen stimulation to determine optimal time for whole blood stimulation; and 2) compare patterns of gene expression in WBC RNA from comparative cervical suspects or reactors from tuberculosis free herds, and cattle naturally infected with M. bovis.  Project 4 Objectives: 1) Evaluate BALB/c mice vaccinated with a RB51 vector vaccine or a BCG vaccine over several months after challenge with deer-origin M. bovis for fecal shedding of the organism, clinical signs, and terminal necropsy for histologic evaluation and mycobacterial isolation and titration; and 2) Compare results with unvaccinated, M. bovis-challenged mice to evaluate vaccine efficacy in increasing disease resistance, decreasing lesion development and mycobacterial organism replication, and controlling shedding of M. bovis. APPROACH: Project 1, Part A: A case-control study will compare risk factors (farm location, ecological data, herd management practices before and after restocking) between herds diagnosed with TB that were depopulated and repopulated (controls) with repopulated herds that have become reinfected with TB (cases).  Project I, Part B: A retrospective case-control study will compare spatial risk factors between herds diagnosed with TB since the beginning of the current disease outbreak (cases) and herds that have not been diagnosed with TB (controls) from the five county area.  Case herds will be those. Risk factors include livestock housing location data (located by Global Positioning Satellite (GPS) systems), specific ecological conditions in cattle housing areas, and herd management practices.  Project 2, Part A: The effect of infection with M. paratuberculosis on results of the bovine TB caudal fold test (CFT) test and gamma interferon assay will be assessed by comparing the false negative rate for these two assays in Johne’s disease high prevalence dairy herds and herds known to be free of Johne’s disease.  Project 2, Part B: The effect of use of select veterinary vaccines on the reliability of the CFT for TB in cattle will be tested by comparing CFT test results and M. bovis gamma interferon production between groups of calves sensitized to M. bovis that are unvaccinated or vaccinated with a commercially available vaccine containing modified-live bovine viral diarrhea virus (BVDV), infectious bovine rhinotracheitis (IBR), PI-3 and bovine respiratory syncital virus (BRSV) (Pyramid, Ft. Dodge Animal Health, Fort Dodge, IA).  Project 2, Part C: A retrospective study of the role of M. paratuberculosis in false reactor response on the CFT and the comparative cervical test (CCT) will compare levels of M. paratuberculosis between CFT positive/M. bovis culture negative cattle and CFT negative cattle by PCR for M. paratuberculosis from sections of ileum and ileal-cecal lymph nodes.  Project 3, Part A: The optimal time of exposure of whole blood to bovine ppd for detection of diagnostic gene targets in caudal fold suspect cattle will be determined by comparing levels of altered expression of 10 genes after 0, 1, 2, 4 or 20 hours of antigen stimulation, between cattle that have been sensitized to M. bovis and cattle that have not been sensitized.  Project 3, Part B: Optimal gene targets for detection of bovine tuberculosis will be identified by stimulating blood with phosphate-buffered saline (PBS) (negative control), M. avium purified protein derivative (PPD), and M. bovis PPD, and harvesting total cellular RNA to generate cDNA for use in real-time quantitative polymerase chain reaction (RT-QPCR).  Project 4: The efficacy of BCG vaccine and a recombinant vector vaccine (RB-51) for M. bovis in laboratory mice will be tested by comparing lesion development and mycobacterial isolation results from vaccinated and unvaccinated mice challenged with deer-origin M. bovis.
PROGRESS: 2005/01 TO 2005/12  Project 1: Data for assessment of spatial relationships between risk for reacquiring TB and proximity to other herds affected by TB, deer habitat, surface water features, and other ecological features in the region have been updated and incorporated into the predictive risk assessment model for a cattle herd becoming reinfected with TB.  Updated information on data from newly infected cattle herds (biosecurity, cattle movement to and from affected herds, cattle feeding practices, cattle housing, and wildlife access to livestock and livestock feed) and additional retrospective data collection are being used to refine the existing predictive model.  Project 2: Dairy cattle with Johne's disease (n = 7) and age matched healthy controls (n = 9) were administered Sensitinogen and tested for tuberculosis using the caudal fold skin test and the whole blood gamma interferon assay.  This study started in 2005 and will continue through 2006.  The number of cattle in the study to date is small, but the data suggests that Johne’s Disease may diminish the caudal fold response and cause false negative results in the whole blood gamma interferon assay.  Project 3:  Whole blood was harvested from 9 cattle that were false positive reactors in the caudal fold skin test and the whole blood gamma interferon assay, and from 4 cattle that had bovine tuberculosis.  The whole cell RNA was extracted from partially purified white blood cells, processed to remove contaminants, and used in microarray experiments to evaluate effect of stimulation of blood with purified protein derivative from Mycobacterium bovis or with phosphate buffered saline solution.  The effects of stimulation was assessed by monitoring changes in expression of greater than 1,000 genes associated with white blood cells of cattle.  The data has been normalized and is ready for statistical evaluation.  This work will be assigned to a graduate student as part of a Ph.D. project.  Project 4: BALBc mice were vaccinated twice with one of two vaccines, including standard BCG vaccine, and a new recombinant vaccine, then challenged intranasally with live M. bovis.  All twelve unvaccinated control mice lost weight, became moribund, and were sacrificed within 4 weeks of challenge; results were similar with the recombinant vaccine mice.  BCG-vaccinated mice maintained activity and body weight, and only two of twelve mice needed to be sacrificed seven weeks post challenge.  The subunit vaccine showed marked reduction in mortality, gross and microscopic lesions compared to unvaccinated mice, which shows good promise for future development of a deer or cattle vaccine that will not interfere with current testing methods. IMPACT: 2005/01 TO 2005/12  Infection of cattle with Johne's disease does not appear to have major influence on the rate of false positive skin TB tests in Michigan.  Furthermore, herd background levels of Johne's disease infection are higher in untested or test negative cattle, indicating that the current skin testing screening methods are doing a good job distinguishing discriminating between tuberculosis and Johne's disease.  The intranasal challenge in BALBc mice is an efficient system for testing efficacy of tuberculosis vaccines.  BCG vaccine demonstrated good protection to challenge, while the recombinant vaccine is being redesigned to increase efficacy.
PUBLICATIONS: 2005/01 TO 2005/12
1. Norby, B., Tempelman, R.J., Hanson, T.E., Kaneene, J.B., Bartlett, P.C. Estimation of sensitivity and specificity of bovine tuberculosis skin tests in Michigan when a perfect reference test is not available. Prev. Vet. Med.  (in-press, 2005).
2. Norby, B., Bartlett, P.C., Grooms, D.L., Kaneene, J.B., Bruning-Fann, C.S. Use of simulation modeling to estimate herd-level sensitivity, specificity, and predictive values of diagnostic tests for detection of tuberculosis in cattle.  AJVR (accepted, 2005).
3. Miller, R., Kaneene, J.B., Schmitt, S.M., Lusch, D.P., Fitzgerald, S.D.  Geographic distribution and spatial analysis of Mycobacterium bovis infection in white-tailed deer. Prev. Vet. Med. (accepted, 2005).
4. Miller, R., Kaneene, J.B.  Mycobacterium bovis in Michigan wildlife: Circumstances leading to the spatial localization of disease. Am J Vet Res. (accepted, 2005).
PROJECT CONTACT:
     Name: Kaneene, J. B.  Phone: 517-353-5941.  Fax: 517-432-0976
     E
mail:
kaneene@cvm.msu.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2005-35204-16474 PROPOSAL NO: 2005-01809
START: 01 SEP 2005 TERM: 31 AUG 2008 FY: 2005 GRANT YR: 2005 GRANT AMT: $350,000
INVESTIGATOR: Coussens, P. M.; Kiupel, M.; Davis, W.
PERFORMING INSTITUTION:  Animal Science.  Michigan State Univ.  East Lansing, Michigan 48824
SUBJECT:  Immune moduation in bovine paratuberculosis: macrophage-T cell interactions.
NON-TECHNICAL SUMMARY: Johne’s disease is caused by M. paratuberculosis and is a devastating problem in the US dairy industry.  There are no effective vaccines against M. paratuberculosis and it appears that the immune system of infected cows is affected by the organism such that this response becomes ineffective over time.  This project makes use of an in vitro system to determine how M. paratuberculosis affects cells of the bovine immune system and prevents proper interactions between various immune cells, thus escaping control.
OBJECTIVES: 1) We will examine the relationship between Mycobacterium paratuberculosis (MAP) infection and expression of IL-1alpha, TRAF1, and TRAF2 in cultured monocyte derived macrophages (MDM).  These studies follow up a previous observation that MAP infected intestinal tissues have enhanced levels of IL-1alpha and TRAF 1.  2) The effect of Mycobacterium paratuberculosis (MAP) infection and IL-1alpha treatment on CD40-CD154 and TNFalpha signaling in MDM will be investigated.  These studies are designed to determine if MAP or IL-1alpha interfere with normal activation of macrophages.  3) The effect of Mycobacterium paratuberculosis infection on interactions between MDM and autologous activated T cells will be examined to determine if MAP interfres with normal macrophage-T cell signaling.  4) Investigate the effect of MAP infection on susceptibility/resistance to apoptosis in MDM.  These studies will determine if MAP promotes cell death or cell survival in infected macrophages.
APPROACH: Monocyte derived macrophages (MDM) will be used to investigate the effects of infection with M. paratuberculosis (MAP) on macrophage activation, signaling, interactions with T cells, and apoptosis.  1) MAP infected and uninfected MDM will be collected at various times post-infection, including: 0 (no MAP treatment), 1, 3, 6, 12, 24, and 48 hours.  Cultures will be harvested for DNA, RNA, and protein at each time point.  DNA will be used to confirm infection and survival of MAP by quantitative IS900 PCR.  TRAF1, TRAF2, and IL-alpha mRNA expression at each time point will be assessed by Q-RT-PCR.  TRAF1 and TRAF2 protein expression will be assayed by western blot analysis.  Relative amounts of TRAF1 and TRAF2 will be determined. IL-1alpha protein in culture supernatants will be measured by ELISA.  We will thus identify optimal times for TRAF1 and IL-1alpha mRNA and protein upregulation in MAP infected MDM.  We also expect to confirm that TRAF1 and IL-1alpha mRNA and protein upregulation occurs coincidentally.  2) TRAF1 is overexpressed in intestinal lesions of MAP infected cows, relative to tissues from healthy cows.  Signaling through CD40, TNFR1, and TNFR2 depends upon the balance of TRAF1 and TRAF2 cells.  We will test the hypothesis that enhanced TRAF1 expression increases non-signaling TRAF1 homotrimers and (TRAF1)2-(TRAF2)1 heterotrimeric complexes within MDM, using a combination of immune precipitation and western blotting.  3) The effect of enhanced TRAF1 expression on CD40 signaling will be assayed by measuring activation of NFkappaB in MDM by electrophoretic mobility shift assay (EMSA).  The ratio of phosphorylated (activated) to non-phosphorylated (inactive) NFkappaB p65 subunit will also be determined.  Finally, activation of IkappaKinase in treated cultures will be measured.  We will monitor mRNA levels for expression of IL-10, IL-12p35, IL-12p40, TNFalpha, MIP-1alpha and production of nitric oxide in MAP infected and IL-1alpha treated MDM in response to soluble CD154.  4) Engagement of the T cell receptor (TCR) with MHC II + antigen on macrophages and binding of other co-stimulatory factors are of paramount importance in macrophage T cell interactions.  To monitor these interactions, fresh PBMCs will be prepared and stimulated with MAP antigens in vitro, for 24 hours.  Following stimulation, autologous T cells corresponding to each MDM culture will be isolated using magnetic cell sorting.  Isolated T cells will be fixed and applied to infected or control MDM and allowed to interact for 4 to 24 hours.  Macrophage activation parameters to be assayed include production of IFNgamma, IL-10, IL-12p35, IL-12p40, TNFalpha, MIP-1alpha, and IL-1alpha mRNA by Q-RT-PCR.  5) The large numbers of macrophages found at sites of MAP infection suggest that infected macrophages have become resistant to normal clearance mechanisms, including apoptosis.  The ability of two common apoptosis-inducing ligands to signal apoptosis in MAP infected and control uninfected MDM will be investigated. Apoptosis will be measured flow-cytometrically using annexin V staining and propidium iodide (PI).
PROJECT CONTACT:
     Name: Coussens, P.  Phone: 517-353-3158  Fax: 517-353-1699
     Email: coussens@msu.edu
     URL:
http://www.cafg.msu.edu 

 

PROJ. TYPE: COOPERATIVE AGREEMENT PROJ STATUS: TERMINATED CONTRACT/GRANT/AGREEMENT NO: 58-3625-0-137
START: 07 SEP 2000 TERM: 28 FEB 2004 FY: 2002 GRANT YR: 2000 GRANT AMT: $146,000
INVESTIGATOR: Bannantine J P; Stabel J R; Kapur V
PERFORMING INSTITUTION:  Veterinary Pathobiology. Univ of Minnesota. St Paul, Minnesota 55108
SUBJECT:  Genome sequencing of Mycobacterium paratuberculosis.
OBJECTIVES: The objective of this cooperative research project is to analyze the genome of Mycobacterium paratuberculosis to identify targets for the development of diagnostic tests and control measures for Johne's Diseases in cattle.
APPROACH: The genome sequence of one isolate of M. paratuberculosis will be analyzed to find sequences which differentiate between M. paratuberculosis and other closely related mycobacteria.  The genome will also be searched to detect sequences coding for potential virulence factors and factors critical for survival of the bacterium within the host.  Gene expression inside macrophages will be determined using DNA microarrays.
PROGRESS: 2000/09 TO 2004/024.  What were the most significant accomplishments this past year?  D. Progress Report. This report serves to document research conducted under a specific cooperative agreement between ARS and the University of Minnesota.  Additional details of research can be found in the report for the parent project 3625-32000-062-00D Understanding Host-Pathogen Interactions for the Diagnosis and Control of Paratuberculosis (Johne's).  This agreement between ARS (NADC) and the University of Minnesota encompasses measures to ensure animal health through an increased understanding of the biology of Mycobacterium paratuberculosis, the bacterial agent that causes Johne's disease.  This project has the objective of sequencing the entire genome of M. paratuberculosis.  Sequencing of this genome has now been completed in our laboratory in collaboration with researchers at the University of Minnesota.  The manuscript describing the genome is now in preparation as well as a searchable database of genome information.  Preliminary results from the genome sequence include identification of potential virulence genes and vaccine candidate sequences.  We have constructed a complete microarray representing all of the genes present in M. paratuberculosis is being constructed.
PUBLICATIONS: 2000/09 TO 2004/02
No publications reported this period.

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT  PROJ STATUS: NEW
START: 04 JUN 2003 TERM: 31 AUG 2005 FY: 2003
INVESTIGATOR: Bannantine J P; Kapur V; Wells S
PERFORMING INSTITUTION: Univ of Minn.  2642 Univ. Ave.  St Paul, Minnesota 55114
SUBJECT:  Functional genomic analysis of Mycobacterium paratuberculosis (Univ. of MN).
OBJECTIVES: The development of diagnostic tests and control measures for Johne's Disease in cattle as outlined in the USDA-NRI grant #2002-02228.  The specific objectives of this cooperative research project are to identify unique antigens from the genome of Mycobacterium paratuberculosis, incorporate these antigens into a diagnostic test, and evaluate this test in dairy cattle herds.
APPROACH: The genome sequence of a bovine isolate of M. paratuberculosis will be analyzed to find DNA sequences which differentiate between M. paratuberculosis and other closely related mycobacteria.  Efforts will then be made to clone, express and purify proteins from these novel M. paratuberculosis sequences.  These purified proteins will be evaluated in a variety of immunological assays to determine which ones are best for diagnostic test development.  The test will be optimized and used in whole-herd field tests of known and unknown infection status.
PROGRESS: 2003/10 TO 2004/094.  What were the most significant accomplishments this past year? D. Progress Report.  This report serves to a document research conducted under a specific copperative agreement between ARS and the University of Minnesota.  This specific cooperative agreement represents a subcontract of USDA-CSREES funds to the University of Minnesota.  Additional details of research can be found in the report for the parent project 3625-32000-062-00D Understanding Host-Pathogen Interactions for the Diagnosis and Control of Paratuberculosis (Johne's).  This specific cooperative agreement between ARS(NADC) and the University of Minnesota encompasses measures to ensure animal health through the control and management of disease by improving detection methods for Johne's disease.  This project has the objective of identifying any remaining sequence that are specific to Mycobacterium paratuberculosis and are not present in closely related mycobacteria.  To date, over twenty-one specific genes have been identified.
PUBLICATIONS: 2003/10 TO 2004/09
No publications reported this period.

 

PROJ TYPE: HATCH PROJ STATUS: REVISED
START: 01 OCT 2002 TERM: 30 SEP 2007 FY: 2005
INVESTIGATOR: Feirtag, J. M.
PERFORMING INSTITUTION: Food Science & Nutrition.  Univ of Minnesota.  St Paul, Minnesota 55108
SUBJECT:  Application of chemiluminescent antibiotics as platform technology for development of rapid pathogen detection.
NON-TECHNICAL SUMMARY: There is a great need for sensitive "real-time" analysis of food environments and products for the presence of pathogenic microorganisms.  The positive economic and food safety issues that would be addressed if this type of technology is made available would have a great impact on the food industry.  This technology would be extremely useful in the application of microbiological verification and validation of HACCP (Hazard Analysis Critical Control Point) systems that are mandatory in much of the food industry.
OBJECTIVES: 1. Develop rapid, single tube, chemiluminescent assays for Listeria, E. coli, Salmonella and other foodborne pathogenic organisms which will be cost effective, simple to use, and compatible with commerical handheld luminometers.  2. Develop the statistical correlation data demonstrating substantial equivalance to current detection and enumeration methods.  3. Validate assay with environmental samples from commerical food processors.  4. Examine environmental factors presenting interferences with the optical assay.  5. Beta test assay in food processing facilites will be initiated.
APPROACH: 1. Commercial antibodies for the specific pathogens are bound to tubes. Chemiluminogenic derivatives of nisin are prepared, from which a nisin-cobalt complex is prepared.  The bacterial culture or environmental sample is placed into the tubes containing the specific bound antibodies for pathogen of choice.  After incubation, the tubes are washed and the nisin-cobalt probe added.  The complex probe/pathogen is detected using the luminol-hydrogen peroxide system.  Antibiotic/metal probes will also be developed for the gram-negative pathogens.  The rapid, single tube assay will be optimized.  2. Data analysis will be done by subtraction of a sterile background control from the raw sample signal, divided by the sterile control signal.  The value is the background corrected signal to background ratio.  Chemiluminescent signals will be obtained from serial dilutions of stock cell suspensions and correlated to the enumeration data obtained from plate counts of the dilutions.  3. Environmental samples will be collected from actual food processing facilities and the assays will be conducted in addition to the traditional methods to correlate the results of the chemiluminescent probe to the traditional methods now being used.  4. Potential substrates that might interfere with the optical assay could include, strong alkaline materials, oxidizers and redox-active metals.  Unknown salts, soils and heavy metals could potentially contribute to measurement error, these factors need to be examined with authentic samples of various origins.  5. Several food processing facilties will be used to beta test the probes developed in the field.
PROGRESS: 2005/01 TO 2005/12  New government mandates in the ready-to-eat foods industry require testing for Listeria on a regular basis.  It is essential that these facilities have a rapid method to determine if the pathogen is present in their environment in order to control its presence in the food products.  Research to date: 1) AOAC approval has been granted for a 30 h Listeria assay (PDX-LIB) which detects down to 10 Listeria cells; 2) a 90 minute immuno-magnetic chemiluminescent (IMC) assay for the detection of Listeria in environmental samples has also been developed and submitted for AOAC approval and is being adopted by the food industry; 3) additional research is currently being conducted to enhance the recovery of injured listeria cells and suppress the presence/growth of other organisms to shorten the 30 h to 12-24 h.  The above assays are being utilized in the food industry at this time.  In addition, work is being conducted on the development of an assay for E. coli O157:H7 and Salmonella that would provide a rapid and sensitive test.  
IMPACT: 2005/01 TO 2005/12  The development and implementation of these "real-time" assays for food pathogens will greatly enhance the food industry in controlling potential foodborne outbreaks associated with these pathogens and help the industry meet the regulatory requirements in microbiological testing, both economically and efficiently.
PUBLICATIONS: 2005/01 TO 2005/12
Godden, S.M., Fetrow, J.R., Feirtag, J.M., Green, L.R. and Wells, S.J. 2005. Economic analysis of feeding milk replacer to dairy calves. JAVMA, 226(9):1547-1554.
PROJECT CONTACT:
     Name: Feirtag, J. M.  Phone: 612-624-3629  Fax: 612-625-5272
     Email: jfeirtag@umn.eduItem

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: EXTENDED
CONTRACT/GRANT/AGREEMENT NO: 2004-35605-14243 PROPOSAL NO: 2003-05165
START: 15 APR 2004 TERM: 14 APR 2007 GRANT YR: 2004 GRANT AMT: $1,500,000
INVESTIGATOR: Kapur, V.; Wells, S.
PERFORMING INSTITUTION: College of Veterinary Medicine Univ of Minnesota St Paul, Minnesota 55108
SUBJECT:  JDIP: Johne's Disease Integrated Program in research, education, and extension.
NON-TECHNICAL SUMMARY: Johne's disease is a disease which results in lost productivity in dairy herds and potential mobidity/mortality.  There is also some concern that the bacterium itself is related to the onset of Crohn’s's disease in humans.  The JDIP program aims to control, and potentially eliminate, Johne's through a combination of research projects on how to manage the disease, and potentially eliminate it.  This is being done through a broad collaboration of research universities and USDA groups, with the collaboration and support of the impacted private sector.
OBJECTIVES: To establish an integrated program in Johne's disease research with a focus on developing a strong translational pipeline of new diagnostic tests, vaccine candidates and strategies to manage, prevent and control the disease.
APPROACH: The above noted objectives will be accomplished via thematic research units on: Johne's disease epidemiology; diagnostic test development including strain differentiation; M. paratuberculosis basic biology and pathogenesis; and strategies for enchancing T and B cell immune response to M. paratuberculosis.  These research units will be supported by scientific support cores in: Biostatics and Epidemiology; Diagnostics and Strain Differentiation; Gene and Protein Expression; and Animal Experimentation.  In addition, an Administrative Core will provide support for both research units and the scientific cores while a Communications and Extension Core will facilitate communication within the overall JDIP as well as translating the outcomes from the research into educational information for the broadly affected Johne's community.  An external advisory board, chosen from public and private stakeholder, will provide guidance to the JDIP team in pursuit of the overall objectives.
PROGRESS: 2005/01 TO 2005/12  Core 1 offered a course in test evaluation and application at the 8th ICP in Denmark.  The course had 34 participants from 17 countries.  Core 1 also provided advice on experimental design and sample size calculation to people seeking year 2 funds from JDIP.  Core 2 has an extensive biological sample repository and created a new inventory database to summarize location, volume, and diagnostic data for more than 500 well-characterized samples.  In-depth epidemiologic data was elicited for 45 percent of the samples.  A new protocol ensures database currency, and a web-based catalogue was drafted to inform the Johne's disease research community of sample availability.  Core 3 assembled and made available to the community a well-defined collection of over 13,000 stocked and confirmed transposon insertional mutants of Mycobacterium avium subsp. paratuberculosis (Map).  The transposon library has been replicated in laboratories at the University of Nebraska (13,824 stocked mutants) and at the University of Wisconsin.  Core 3 also completed an oligo array representing each of the genes in the Map genome.  Core 4 began a 12-month study evaluating 4 methods of experimental infection in neonatal calves.  Antigen-specific interferon-g response secretion was upregulated in calves within one month of infection.  Fecal shedding for calves was negligible thus far, except for the calves inoculated with mucosal scrapings from a clinically affected cow.  These calves shed high numbers of MAP through four months post-infection.  Core 5 created producer modules for dairy, beef, goat, and sheep (including a Spanish version for dairy), as well as a veterinary module for goats, and also launched the virtual dairy farm visit.  Core 5 has had over 900 registrations for the Online Johne's Certificate Program and now has 39 states participating.  Project 1 defined a protocol for sample collection, collected data and did extensive testing for paratuberculosis to evaluate dam-daughter transmission risk.  Also, a prospective cohort study has been implemented to test the hypothesis that off-site rearing of heifers results in a lower incidence of Map and reduced production effects compared with heifers raised on-site.  Project 2 determined that alternative sampling and testing strategies are available to achieve Level 1 of the Voluntary Johne's Disease (JD) Test Negative Program.  The study laid a strong scientific foundation to identify testing strategies for detection of herds infected with Map, and results are already being used to improve herd detection within the national JD control program.  Project 3 used a high throughput genomic approach to identify novel virulence genes in Map and developed novel postulates that focus on a group of genes that could contribute to the pathogenesis of JD, and developed a state of the art DNA microarrays technology to examine the expression profile of Map.  Project 4 completed the first study of the immune response to Map in neonatal calves, and study of the immune response in animals at different stages of disease is still in progress.  They also established the cannulated ileum model and are conducting the first studies.
IMPACT: 2005/01 TO 2005/12  Johne's disease (JD) is a serious economic and animal health problem in domesticated ruminants (primarily dairy and beef cattle, sheep, and goats) throughout the world.  JD in wildlife species is also of great concern since it may limit opportunities to control or eradicate JD from domesticated animals.  JDIP, through its projects and cores, develops science-based solutions to enhance animal biosecurity to limit the spread of JD within herds and prevent its introduction into previously uninfected herds.  We have assembled a strong scientific team with an outstanding record of accomplishments who are working together under the auspices of JDIP to help develop and implement a comprehensive plan to enhance animal biosecurity through the targeted development of rational methods for the diagnosis, prevention, and control of Johne's disease.
PUBLICATIONS: 2005/01 TO 2005/121.  
1. Berghaus, R. D., J. E. Lombard, I. A. Gardner, and T. B. Farver. 2005. Factor analysis of a Johne's disease risk assessment questionnaire with evaluation of factor scores and a subset of original questions as predictors of observed clinical paratuberculosis. Prev Vet Med 72:291-309.  
2. Collins, M. T., S. J. Wells, K. R. Petrini, J. E. Collins, R. D. Schultz, and R. H. Whitlock. 2005. Evaluation of five antibody detection tests for diagnosis of bovine paratuberculosis. Clin Diagn Lab Immunol 12:685-92.  
3. Corn, J. L., E. J. Manning, S. Sreevatsan, and J. R. Fischer. 2005. Isolation of Mycobacterium avium subsp. paratuberculosis from free-ranging birds and mammals on livestock premises. Appl Environ Microbiol 71:6963-7.
4. Coussens, P. M., C. B. Pudrith, K. Skovgaard, X. Ren, S. P. Suchyta, J. R. Stabel, and P. M. Heegaard. 2005. Johne's disease in cattle is associated with enhanced expression of genes encoding IL-5, GATA-3, tissue inhibitors of matrix metalloproteinases 1 and 2, and factors promoting apoptosis in peripheral blood mononuclear cells. Vet Immunol Immunopathol 105:221-34.  
5. Crossley, B. M., F. J. Zagmutt-Vergara, T. L. Fyock, R. H. Whitlock, and I. A. Gardner. 2005. Fecal shedding of Mycobacterium avium subsp. paratuberculosis by dairy cows.  Vet Microbiol 107:257-63.  
6. Eda, S., B. Elliott, M. C. Scott, W. R. Waters, J. P. Bannantine, R. H. Whitlock, and C. A. Speer. 2005. New method of serological testing for Mycobacterium avium subsp. paratuberculosis (Johne's disease) by flow cytometry. Foodborne Pathog Dis 2:250-62.  
7. Ellingson, J. L., J. R. Stabel, R. P. Radcliff, R. H. Whitlock, and J. M. Miller. 2005. Detection of Mycobacterium avium subspecies paratuberculosis in free-ranging bison (Bison bison) by PCR. Mol Cell Probes 19:219-25.  
8. Georgiadis, M. P., W. O. Johnson, and I. A. Gardner. 2005. Sample size determination for estimation of the accuracy of two conditionally independent tests in the absence of a gold standard. Prev Vet Med 71:1-10.  
9. Griffin, J. F., E. Spittle, C. R. Rodgers, S. Liggett, M. Cooper, D. Bakker, and J. P. Bannantine. 2005. Immunoglobulin G1 enzyme-linked immunosorbent assay for diagnosis of Johne's Disease in red deer (Cervus elaphus). Clin Diagn Lab Immunol 12:1401-9.
10. Harris, N. B., S. Robbe-Austerman, and J. B. Payeur. 2005. Effect of egg yolk on the detection of Mycobacterium avium subsp. paratuberculosis using the ESP II liquid culture system. J Vet Diagn Invest 17:554-60.11.
11. Huntley, J. F., J. R. Stabel, and J. P. Bannantine. 2005. Immunoreactivity of the Mycobacterium avium subsp. paratuberculosis 19-kDa lipoprotein. BMC Microbiol 5:3. 
12. Huntley, J. F., J. R. Stabel, M. L. Paustian, T. A. Reinhardt, and J. P. Bannantine. 2005.  Expression library immunization confers protection against Mycobacterium avium subsp. paratuberculosis infection. Infect Immun 73:6877-84.
13. Huntley, J. F., R. H. Whitlock, J. P. Bannantine, and J. R. Stabel. 2005. Comparison of diagnostic detection methods for Mycobacterium avium subsp. paratuberculosis in North American bison. Vet Pathol 42:42-51.
14. Kiehnbaum, L. A., A. Amonsin, S. J. Wells, and V. Kapur. 2005. Amplified fragment length polymorphism to detect clonal diversity and distribution of Mycobacterium avium subspecies paratuberculosis in selected Minnesota dairy cattle. J Vet Diagn Invest 17:311-5.
15. Koo, H. C., Y. H. Park, J. Ahn, W. R. Waters, M. V. Palmer, M. J. Hamilton, G. Barrington, A. A. Mosaad, K. T. Park, W. K. Jung, I. Y. Hwang, S. N. Cho, S. J. Shin, and W. C. Davis. 2005. Use of rMPB70 protein and ESAT-6 peptide as antigens for comparison of the enzyme-linked immunosorbent, immunochromatographic, and latex bead agglutination assays for serodiagnosis of bovine tuberculosis. J Clin Microbiol 43:4498-506.
16. Li, L., J. P. Bannantine, Q. Zhang, A. Amonsin, B. J. May, D. Alt, N. Banerji, S. Kanjilal, and V. Kapur. 2005. The complete genome sequence of Mycobacterium avium subspecies paratuberculosis. Proc Natl Acad Sci U S A 102:12344-9.
17. Miltner, E., K. Daroogheh, P. K. Mehta, S. L. Cirillo, J. D. Cirillo, and L. E. Bermudez. 2005. Identification of Mycobacterium avium genes that affect invasion of the intestinal epithelium. Infect Immun 73:4214-21.  
18. Motiwala, A. S., M. Strother, N. E. Theus, R. W. Stich, B. Byrum, W. P. Shulaw, V. Kapur, and S. Sreevatsan. 2005. Rapid detection and typing of strains of Mycobacterium avium subsp. paratuberculosis from broth cultures. J Clin Microbiol 43:2111-7.
19. Naser, S. A., and M. T. Collins. 2005. Debate on the lack of evidence of Mycobacterium avium subsp. paratuberculosis in Crohn’s's disease. Inflamm Bowel Dis 11:1123.
20. Palmer, M. V., W. C. Stoffregen, J. G. Carpenter, and J. R. Stabel. 2005. Isolation of Mycobacterium avium subsp paratuberculosis (Map) from feral cats on a dairy farm with Map-infected cattle. J Wildl Dis 41:629-35.
21. Paustian, M. L., V. Kapur, and J. P. Bannantine. 2005. Comparative genomic hybridizations reveal genetic regions within the Mycobacterium avium complex that are divergent from Mycobacterium avium subsp. paratuberculosis isolates. J Bacteriol 187:2406-15.
22. Raizman, E. A., S. J. Wells, P. A. Jordan, G. D. DelGiudice, and R. R. Bey. 2005. Mycobacterium avium subsp. paratuberculosis from free-ranging deer and rabbits surrounding Minnesota dairy herds. Can J Vet Res 69:32-8.
23. Rajeev, S., Y. Zhang, S. Sreevatsan, A. S. Motiwala, and B. Byrum. 2005. Evaluation of multiple genomic targets for identification and confirmation of Mycobacterium avium subsp. paratuberculosis isolates using real-time PCR. Vet Microbiol 105:215-21.
24. Roussel, A. J., M. C. Libal, R. L. Whitlock, T. B. Hairgrove, K. S. Barling, and J. A. Thompson. 2005. Prevalence of and risk factors for paratuberculosis in purebred beef cattle. J Am Vet Med Assoc 226:773-8.
25. Salgado, M., E. J. Manning, and M. T. Collins. 2005. Performance of a Johne's disease enzyme-linked immunosorbent assay adapted for milk samples from goats. J Vet Diagn Invest 17:350-4.
26. Sevilla, I., S. V. Singh, J. M. Garrido, G. Aduriz, S. Rodriguez, M. V. Geijo, R. J. Whittington, V. Saunders, R. H. Whitlock, and R. A. Juste. 2005. Molecular typing of Mycobacterium avium subspecies paratuberculosis strains from different hosts and regions. Rev Sci Tech 24:1061-6.
27. Shin, S. J., C. F. Chang, C. D. Chang, S. P. McDonough, B. Thompson, H. S. Yoo, and Y. F. Chang. 2005. In vitro cellular immune responses to recombinant antigens of Mycobacterium avium subsp. paratuberculosis. Infect Immun 73:5074-85.
28. Stabel, J. R., and J. P. Bannantine. 2005. Development of a nested PCR method targeting a unique multicopy element, ISMap02, for detection of Mycobacterium avium subsp. paratuberculosis in fecal samples. J Clin Microbiol 43:4744-50.
29. van Schaik, G., S. M. Stehman, R. H. Jacobson, Y. H. Schukken, S. J. Shin, and D. H. Lein. 2005. Cow-level evaluation of a kinetics ELISA with multiple cutoff values to detect fecal shedding of Mycobacterium avium subspecies paratuberculosis in New York State dairy cows. Prev Vet Med 72:221-36.
PROJECT CONTACT:
     Name: Kapur, V.  Phone: 612-625-7712  Fax: 612-626-0623
     Email: vkapur@umn.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2004-35204-14756 PROPOSAL NO: 2004-01413
START: 01 AUG 2004 TERM: 31 JUL 2008 GRANT YR: 2004 GRANT AMT: $454,506
INVESTIGATOR: Godden, S.
PERFORMING INSTITUTION: Veterinary Population Medicine Univ of Minnesota St Paul, Minnesota 55108
SUBJECT:  Evaluation of critical control points in youngstock and adult dairy cow management to reduce transmission of Mycobacterium avium subspecies.
NON-TECHNICAL SUMMARY: The modes of transmission of Mycobacterium paratuberculosis (Map) are inadequately understood, and the efficacy and cost-effectiveness of current recommended control programs have not been formally evaluated.  This project will critically evaluate the efficacy, magnitude of impact, and cost-effectiveness of several commonly recommended practices surrounding youngstock management, for reducing the transmission of Map in infected dairy herds.  OBJECTIVES: The long-term goal of this proposal is to complete a series of prospective controlled field studies designed to critically evaluate the efficacy, magnitude of impact, and cost-effectiveness of several commonly recommended practices surrounding the management of youngstock and adult dairy cattle, for reducing the transmission of M. paratuberculosis in infected dairy herds.  This goal will be achieved through the following five objectives:  1. Evaluate the Effect of Maternity Pen Management on Transmission Mycobacterium avium subspecies paratuberculosis in Newborn Calves.  2. Evaluate the Effect of Off-Site Heifer Rearing on Transmission of Mycobacterium avium subspecies paratuberculosis in Youngstock.  3. Evaluate the Effect of Feeding of Bovine Colostrum (vs. a Commercial Colostrum Substitute) on the Risk for Transmission of Mycobacterium avium subspecies paratuberculosis in Newborn Calves.  4. Evaluate the Effect of Feeding Pasteurized Waste Milk (vs. Commercial Milk Replacer) to Control Transmission of Mycobacterium avium subsp. paratuberculosis in Dairy Calves.  5. Evaluate the Effect of Delaying Exposure to Mycobacterium avium subspecies paratuberculosis until Adulthood on the Development of New Infections in Adult Dairy Cows.
APPROACH: The first objective is to evaluate the effect of maternity pen management on M. paratuberculosis (Map) transmission.  This will be evaluated in 4 large dairy herds with a high seroprevalence of Johne’s disease (at least 10 percent of cows ELISA-positive).  Each herd will randomly allocate 50 percent of cows to calve in individual pens (treatment) that are cleaned between uses.  The remainder of cows will calve in the usual location (e.g. multiple cow loose housing maternity areas).  This allocation will continue for up to 12 mos.  After removal from calving areas, all replacement heifers will be raised segregated from adult cattle and their feces until 20 mos. of age.  The second objective is to evaluate the effect of off-site heifer rearing on Map transmission.  This will be conducted in 2 herds of greater than 1000 cows that currently have a high seroprevalence (greater than 10 percent ELISA positive cows).  In each herd, 300 heifer calves will be randomly allocated to each treatment group (off-site or on-site rearing).  Enrollment of calves will take approximately 12 mos.  The third objective will continue a field study designed to evaluate the effect of feeding of bovine colostrum on Map transmission.  The enrollment phase for this study was completed between July through Sept., 2003, wherein approximately 500 newborn heifer calves from 12 Midwest herds were removed from the dam within 30 to 60 minutes of calving and then systematically assigned to be fed either 4 L of fresh bovine colostrum or 2 L of a commercial colostrum substitute (Secure, A.P.C. Inc., Ames, IA).  The fourth objective is to evaluate the effect of feeding pasteurized waste milk to control Map transmission.  The enrollment phase of this study included was completed between Dec. 2001 and Oct. 2003 and involved one large commercial dairy farm with a 12-15 percent seroprevalence for Johne’s infection.  A total of 439 heifer and bull calves delivered to these cows were transported to an off-site heifer grower at 1-2 d of age, where they were systematically assigned to be fed either batch pasteurized waste milk (n equals 222) or a conventional 20:20 milk replacer (n equals 217).  The fifth objective is to evaluate the effect of delaying exposure to Map until adulthood on the development of new MAP infection in adult cows.  This will be evaluated by comparing rates of subclinical and clinical Johne’s disease in cattle raised in an environment presumed free of Johne’s disease to those of cattle raised in an environment presumed to be infected.  Through collaboration with the MN Board of Animal Health, we have identified unclassified or high Johne’s disease incidence herds that have purchased replacement cattle from uninfected herds.  A total of 100 case cattle (exposed equals raised in low risk Johne’s disease infected herds and introduced into Johne’s disease infected herds as springing heifers) will be identified, along with 3 homebred control cows per case (non-exposed) matched within herd and by lactation number and stage of lactation.  For all objectives, follow-up fecal culture and serum ELISA testing of study animals will performed on an annual basis at approx. 24 and 36 months of age. PROGRESS: 2005/01 TO 2005/12  The goal of this study is to complete a series of prospective on-farm controlled field studies to evaluate the efficacy and cost-benefit of recommended practices, surrounding the management of youngstock and adult dairy cattle, for reducing the transmission of Mycobacterium avium subspecies paratuberculosis (Map) in infected herds.  While it is too soon to report study results, progress for each objective is reported: Obj. 1 Evaluate the effect of maternity pen management on Map transmission in newborn calves.  Four MN dairy herds with clinical Johne’s disease were enrolled in a maternity pen trial to compare the effects of individual versus group maternity pen housing on Johne’s disease transmission.  Calf enrollment was completed in December, 2005.  Follow-up will continue for 3 more years.  Obj. 2. Evaluate the effect of off-site (vs. on-site) heifer rearing on Map transmission in youngstock.  This California field trial is enrolling and following 3 groups of animals: 300 heifers raised totally on-site, 250 heifers raised on-site until 5 - 7 mos and then reared off-site until first calving, and 300 heifers reared entirely off-site until first calving.  Calf enrollment began in 2005 and is ongoing.  Obj. 3. Evaluate the effect of feeding fresh bovine colostrum (vs. colostrum substitute) on the risk for Map transmission in newborn calves.  In 2003, approximately 433 newborn heifer calves from 12 dairy herds in MN and WI were fed either a) maternal colostrum or b) a commercial colostrum substitute (Acquire. A.P.C. Inc. Ames, IA).  In winter, 2006, 331 study animals (2.5 yrs old) were tested for Map infection using serum ELISA and fecal culture (laboratory test results pending).  Animals will be retested in 2007 and 2008.  Obj. 4. Evaluate the effect of feeding pasteurized waste milk (vs. commercial milk replacer) to control Map transmission in dairy calves.  In 2002, 438 newborn heifer and bull calves were assigned to be fed either a) pasteurized non-saleable milk or b) a commercial 20:20 milk replacer until weaned.  Study heifers were tested for or Map infection in 2004 (2.5 yrs old) and 2005 (3.5 yrs old).  In 2005 11.3 and 12.4 percent of animals were seropositive and fecal culture positive, respectively.  Follow-up testing will continue for 1 more year (4.5 yrs old).  Obj. 5. Evaluate the effect of delaying exposure to Map until adulthood on the development of new infections in adult dairy cows.  This study will compare rates of subclinical and clinical Johne’s disease in cattle raised in an environment presumed free of Johne’s disease to those of cattle raised in an environment presumed to be infected.  Preliminary results from testing in 2004 indicate that dairy cattle raised in Johne’s low risk herds (Level 3 or 4) and introduced to Johne’s infected herds were less likely to test positive for Johne’s disease than herdmates raised in infected herds (OR = 0.10, 95 percent CI = 0.01-0.75 for antibody to Map and OR = 0.38, 95 percent CI = 0.14-0.98 for bacterial culture for Map in feces).  Follow-up testing is ongoing.
IMPACT: 2005/01 TO 2005/12  This research will contribute to the development of more comprehensive Johne’s disease control programs that are both scientifically sound and cost-effective.
PUBLICATIONS: 2005/01 TO 2005/12
No publications reported this period
PROJECT CONTACT:
     Name: Godden, S.  Phone: 612-625-8177  Fax: 612-625-6241
     Email: godde002@umn.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2005-35204-16106 PROPOSAL NO: 2005-01426
START: 01 AUG 2005 TERM: 31 JUL 2008 GRANT YR: 2005 GRANT AMT: $350,000
INVESTIGATOR: Sreevatsan, S.
PERFORMING INSTITUTION: Veterinary Population Medicine.  Univ of Minnesota.  St Paul, Minnesota 55108
SUBJECT:  Studies on genotype-specific host-pathogen interactions in Mycobacterium avium subspecies paratuberculosis.
NON-TECHNICAL SUMMARY: The proposed studies attempt to improve animal health and prevent disease caused by MAP through a program of fundamental research that will enable the development of superior diagnostic reagents, vaccines and antimicrobial agents.
OBJECTIVES: Johne's disease (JD), a chronic inflammatory disease caused by infection with Mycobacterium avium subsp. paratuberculosis (MAP), is one of the most prevalent and costly diseases of cattle and sheep worldwide.  Our long-term objective is to provide a comprehensive understanding of bacterial population genetics and host-pathogen interactions in MAP infections.  Our preliminary studies have revealed substantial differences in survival among genotypically distinct MAP strains in bovine macrophages and strain-specific variation in transcript profiles.  Thus, we hypothesize that genetically distinct subtypes of MAP differ in their effect on host macrophage and dendritic cells and these differences play a major role in determining the character of infection.  In the current application, we propose to study the differential gene expression by the host and MAP strains in a peripheral blood monocyte derived macrophage and dendritic cell models.  Toward this end, the following objectives are proposed: (1) Establish baseline, early and late post macrophage and dendritic cell-exposure gene expression profiles in genetically distinct and identical MAP strains isolated in the United States from a variety of host species.  We propose to use a well-established enrichment approach termed, Selective Capture of Transcribed Sequences (SCOTS) to compare and contrast the differentially expressed genes from the genotypically distinct strains of MAP and (2) Establish baseline and post MAP-exposure cytokine and gene expression profiles in bovine macrophages and dendritic cells at the transcript and protein levels using well-established bovine total leukocyte microarrays and ELISAs, respectively.  The proposed studies attempt to improve animal health and prevent disease caused by MAP through a program of fundamental research that will enable the development of superior diagnostic reagents, vaccines and antimicrobial agents.
APPROACH: We propose to use a well-established enrichment approach termed, Selective Capture of Transcribed Sequences (SCOTS) to compare and contrast the differentially expressed genes from the genotypically distinct strains of MAP and well-established bovine total leukocyte microarrays to interrogate host gene expression profiles.
PROJECT CONTACT:
     Name: Sreevatsan, S.  Phone: 612-625-3769  Fax: 612-624-4906
     Email: sreev001@umn.eduItem

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2005-35204-16198 PROPOSAL NO: 2005-01447
START: 01 AUG 2005 TERM: 31 JUL 2008 GRANT YR: 2005 GRANT AMT: $350,000
INVESTIGATOR: Weiss, D.; Rutherford, M.
PERFORMING INSTITUTION: Veterinary Biomedical Sciences.  Univ of Minnesota.  St Paul, Minnesota 55108
SUBJECT:  Bovine mucosal immune response to mycobaterial infection: role of interleukin-10 and CD10 and CD25 T-cells.
NON-TECHNICAL SUMMARY: Results of recent studies have established that Johne's disease is one of the most prevalent and costly diseases of ruminants worldwide.  It has been estimated that 35% of U.S. dairy herds are infected with M. a. ptb.  Beef herds are also infected.  Johne's disease is also a threat to wild ruminant populations, including deer, elk, and moose.  Most investigators agree that eradication of Johne's disease will be difficult or impossible because M. a. ptb has a long subclinical period, survives for long periods in the environment, is highly resistant to disinfectants, and is widely spread throughout wild animal and bird populations.  Although current vaccines have some capacity to reduce the occurrence of clinical disease, they have not been effective in preventing infection or eradicating the disease.  Therefore, we propose that it is essential to understand host-organism interactions that lead to chronic infection.  Because the infection is localized in the intestinal tract, it is particularly important to study innate and adaptive immune responses occurring in the lamina propria.  To address this, we propose to undertake in vitro studies, using bovine mononuclear leukocytes and in vivo studies of mucosal immune responses of calves experimentally infected with M. a. ptb.
OBJECTIVES: Specific Aim #1: To determine the role of MAPK-p38 in regulating expression of IL-10 in bovine mononuclear phagocytes ingesting M. a. ptb organisms.  The working hypothesis for this research aim is that survival of M. a. ptb within macrophages is largely due to the capacity of the organism to induce phosphorylation of MAPK-p38 with subsequent expression of IL-10.  To address this hypothesis, we will evaluate the effect of specific inhibitors (chemical and interfering RNA) of MAPK-p38 on IL-10 production and transcription factor binding to the IL-10 promoter.  Specific Aim 2: To determine the biological significance of MAPK-p38 signaling in the interaction of mononuclear phagocytes with M. a. ptb organisms.  The working hypothesis for this research aim is that MAPK-p38 enhances IL-10 production and downregulates IL-12 production, thereby attenuating the capacity of macrophages to mount an antimicrobial response.  To address this hypothesis, we will incubate bovine mononuclear phagocytes with M. a. ptb organisms with and without addition of MAPK-p38 siRNA and determine the capacity of macrophages to ingest and kill the organisms, express IL-10 and IL-12 mRNA, and acidify phagosomes.  To define novel effects of MAPK-p38 inhibition on macrophage-M. a. ptb interactions, we will conduct microarray studies.  Specific Aim 3: To determine the role of IL-10 and regulatory T cells in attenuating mucosal immune responses in calves experimentally infected with M. a. ptb.  The working hypothesis for this research aim is that overproduction of IL-10 attenuates innate and adaptive immune responses in the mucosa.  To address this hypothesis, we will evaluate the mucosal immune response of calves at multiple time points after oral inoculation of M. a. ptb organisms.  
APPROACH: We will use both in vitro and in vivo approaches to study the pathogenesis of Johne's disease.  In the invitro studies, we will evaluate cell signaling pathways that are involved in attenuating inflammatory and immune responses when macrophages ingest M. a. ptb organisms.  Our preliminary studies have identified interleukin-10 (IL-10) as a critical factor in attenuating inflammatory and immune responses and indicate that M. a. ptb-induced IL-10 production is primarily mediated by the p38 mitogen-activated protein kinase pathway.  In the in vivo studies, we will infect calves with M. a. ptb organisms and investigate the role of IL-10 and CD25+ regulatory T cells in preventing an effective immune response to the organism.
PROJECT CONTACT:
     Name: Weiss, D.  Phone: 612-625-9242.  Fax: 612-625-5203
     Email: weiss005@umn.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 00-35201-9200 PROPOSAL NO: 2000-02215
START: 01 SEP 2000 TERM: 31 AUG 2002 FY: 2003 GRANT YR: 2000 GRANT AMT: $575,000
INVESTIGATOR: Kapur, V.; Bannantine, J. P.; Bolin, C. A.; Stabel, J. R.
PERFORMING INSTITUTION: Veterinary Pathobiology.  Univ of Minnesota.  St Paul, Minnesota 55108
SUBJECT:  Genome sequencing and analysis of Mycobacterium paratuberculosis.
NON-TECHNICAL SUMMARY: Mycobacterium paratuberculosis is the bacterium that causes Johne's disease in cattle and other small ruminants.  This disease has a major economic and animal health impact in the United States and other parts of the world.  However, despite more than a century of research on the disease and the pathogen, we lack effective diagnostic tests and vaccines for preventing the disease.  We have proposed a collaborative project to determine the complete nucleotide sequence of Mycobacterium paratuberculosis.  To accomplish this objective, we will utilize a random shotgun sequencing strategy that has been successfully applied in the past for whole genome sequence analysis of microbial and other organisms.  The results of the investigation will help in the identification of all of the genes responsible for microbial replication, virulence, species-specificity, and ability to evade the immune system.  We believe that this comprehensive knowledge of the pathogen's genome will provide all the necessary information required for cost-effective and targeted research into disease prevention and treatment such as the development of superior diagnostic tests and vaccines.
OBJECTIVES: Our long-term goal is to improve animal health and prevent disease caused by M. paratuberculosis through a program of fundamental research that will enable the development of superior diagnostic reagents, vaccines and antimicrobial agents.  We here hypothesize that the whole genome sequencing approach will not only provide a rational basis for the development of new and effective diagnostic reagents, vaccines and drugs, but also facilitate future research on important questions relating to virulence and pathogenicity of M. paratuberculosis.  Our preliminary studies have revealed substantial levels of genetic identity and some notable differences in the genomes of M. avium and M. paratuberculosis.  These studies have led us to develop a simple yet comprehensive strategy to determine the complete sequence of the M. paratuberculosis genome.  APPROACH: In brief, to achieve our overall goals, and test our hypothesis, we have proposed studies with three specific aims: (i) Construction and sequencing of a random small insert plasmid library of M. paratuberculosis strain K-10. Library construction will take place as per established in pUC18 vectors.  High-throughput DNA sequencing will be utilized to determined the nucleotide sequence from both ends of 30,000 clones for a three-fold coverage of the M. paratuberculosis genome (assuming approx. 500 bp average sequence read length, and a genome size of approx. 5 Mb). (ii).  Construction and sequencing of the ends of large-insert bacteriophage lambda clones and applying a directed PCR-based strategy for closing the gaps.  The sequencing of the ends of two large-insert libraries constructed in bacteriophage lambda will provide a scaffolding structure to enable gap filling by constructing new primers and sequencing of the ends of the lambda clones wherever there are sequence gaps. (iii).  Editing and annotation of the completed sequence.  All sequence data management, editing, similarity searching and annotation will be performed with the public-domain computer programs, phredPhrap/Consed, ARTEMIS, and WIT2 that have been written expressly for these purposes and are in routine use in our laboratory.  The aligned nucleotide sequences will be visually inspected and all sequence ambiguities will be edited and resolved.  The genome will then be annotated based on database similarity searches and the genes assigned with known or putative functional roles.  The annotated sequences developed from this study will be deposited in public databases (eg. GenBank, TIGR database) as well as uploaded daily onto our web-site with a built-in search engine.  Using this strategy, we will be able to rapidly and completely annotate and analyze the genome of M. paratuberculosis, as well as enable us and other researchers to utilize the sequence database for facilitating their hypothesis-based studies.  Overall, we believe that the information derived from this study will facilitate the identification of antigens that could be used in vaccines and in the future development of new classes of antimicrobial agents capable of specifically interfering with newly identified M. paratuberculosis genes and their proteins. Importantly, the availability of the complete nucleotide sequence of the M. paratuberculosis genome will facilitate future hypothesis-based research on questions relating to bacterial virulence and pathogenicity.
PROGRESS: 2001/01 TO 2001/12  Excellent progress has been made towards completion of the program.  The shotgun sequencing phase has been completed and closure of the genome is progressing well.  The analysis has already identified numerous potential "unique genes" as targets for diagnostic test development and the follow-up of these targets is proceeding very well.
IMPACT: 2001/01 TO 2001/12  1. The project is expected to identify the complete repertoire of genes in Mycobacterium paratuberculsosis, the causative agent of bovine Johne's disease.  2.  The project is expected to identify potential genes that will enable the development of superior diagnostic tests for Johnse's disease.
PUBLICATIONS: 2001/01 TO 2001/12
Bannantine, J.P., E. Baechler, Q. Zhang, L-L Li, and V. Kapur. 2002. Genome scale comparison of Mycobacterium avium subsp. paratuberculosis with Mycobacterium avium subsp. avium reveals potential diagnostic sequences. J. Clin. Microbiol. In press
PROJECT CONTACT:
     Name: Kapur, V.  Phone: 612-625-7712  Fax: 612-625-5203
     Email: vkapur@tc.umn.edu

 

PROJ TYPE: STATE PROJ STATUS: EXTENDED
START: 01 OCT 1983 TERM: 30 JUN 2008 FY: 2004
INVESTIGATOR: Collins, J. E.; Goyal, S.
PERFORMING INSTITUTION: Veterinary Diagnostic Medicine.  Univ of Minnesota.  St Paul, Minnesota 55108
SUBJECT:  Animal disease diagnostic laboratory.
OBJECTIVES: Provide laboratory diagnostic service to poultry and livestock producers and veterinary practitioners for State of Minnesota, conduct preliminary investigations and initiate minor research on new animal disease problems, develop improved diagnostic procedures for selected disease problems.
APPROACH: Case histories and diagnostic laboratory data will be recorded for each case presented.  Appropriate laboratory procedures will be employed for each case or specimen.  Field diagnostic investigations will be made for animal disease problems as necessary.  Efforts will be made to improve existing diagnostic laboratory procedures through minor research studies and new diagnostic procedures will be utilized when developed.
PROGRESS: 2005/01 TO 2005/12  The number of cases submitted to the Minnesota Veterinary Diagnostic Laboratory (MVDL) increased from 64,055 in 2004 to 66,801 in 2005.  The number of procedures also increased from 1,220,685 in 2004 to 1,364,618 in 2005.  Paratuberculosis (Johne's disease), bovine viral diarrhea, and enteritis by rotavirus, coronavirus, and Salmonella were the major problems.  Tuberculosis was also detected in five Minnesota beef herds and one wild white-tailed deer.  In pigs the major problems were caused by porcine reproductive and respiratory syndrome virus (PRRSV) and swine influenza virus.  Avian pneumovirus continues to be a problem for the turkey industry.  Fewer Minnesota deer were tested for chronic wasting disease this year because no cases of this disease were found in the last 3 years of testing.
IMPACT: 2005/01 TO 2005/12  The Veterinary Diagnostic Laboratory plays an important role in protecting the health of animals as well as to protect the public from food borne and zoonotic diseases.
PUBLICATIONS: 2005/01 TO 2005/12
1. Chander Y, Kumar K, Gupta SC, and Goyal SM. 2005 Evaluation of CHROMagar Salmonella medium for the isolation of Salmonella from animal manure. Internat. J. Appl. Res.Vet. Med. 3:35-39.
2. Chander Y, Kumar K, Goyal SM, and Gupta SC. 2005 Antimicrobial activity of soil bound antibiotics. J. Environ. Qual. 34:1952-1957.
3. Collins MT, Wells SJ, Petrini KR, Collins JE, Schultz RD, Whitlock RH. Evaluation of five antibody detection tests for diagnosis of bovine paratuberculosis. Clin. Diagn. Lab. Immunol. 2005. 12:685-692.
4. Dee SA, Deen J, Jacobson L, Rossow KD, Mahlum C, Pijoan C. 2005 Laboratory model to evaluate the role of aerosols in the transport of porcine reproductive and respiratory syndrome virus. Vet. Rec. 156:501-504.
5. Herman M, Haugerud S, Malik YS, and Goyal SM. 2005 Improved in vitro cultivation of swine influenza virus. Internat. J. Appl. Res. Vet. Med. 3:124-128.
6. Maherchandani S, Patnayak DP, Lauer D, and Goyal SM. 2005 Evaluation of five different antigens in enzyme-linked immunosorbent assay for the detection of avian pneumovirus antibodies. J. Vet. Diagn. Invest. 17:16-22.
7. Malik YS, Chander Y, Gupta SC, and Goyal SM. 2005 A retrospective study on antimicrobial resistance in Mannheimia (Pasteurella) haemolytica, Escherichia coli, Salmonella spp., and Bordetella avium from chickens in Minnesota. J. Appl. Poultry Res. 14:506-511.
8. Malik YS, Maherchandani S, Allwood PB, and Goyal SM. 2005 Evaluation of animal origin cell cultures for in vitro cultivation of Noroviruses. J. Appl. Res. Clin. Expt. Therapeutics. 5:312-317.
9. Patnayak DP, Tiwari A, and Goyal SM. 2005 Growth of vaccine strains of avian pneumovirus in different cell lines. Avian Pathol. 34:123-126.
10. Goyal, S.M. and Ridpath, J.F. (Eds). 2005. BVD - Diagnosis, Management, and Control. Blackwell Scientific, Ames, IA

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 58-1940-0-008
START: 01 MAR 2000 TERM: 28 FEB 2005 FY: 2001 GRANT YR: 2000 GRANT AMT: $1,266,886
INVESTIGATOR: Rock D L; Mcintosh M; Riley L
PERFORMING INSTITUTION: University of Missouri.  Columbia, Missouri 65211
SUBJECT:  Program for prevention of animal infections and advanced technologies for vaccines and diagnostics.
OBJECTIVES: (1) To identify and characterize vaccine targets for important viral and bacterial pathogens of livestock; (2) To identify and characterize important factors involved in optimizing host responses to intracellular and extracellular pathogens of livestock; and (3) To perform epidemiologic and other surveys sufficient to identify and design enhanced diagnostic capabilities for economically important pathogens of livestock.
APPROACH: Conduct collaborative research on development of vaccine materials and diagnostics for economically important pathogens of livestock.
PROGRESS: 2003/10 TO 2004/09  1. What major problem or issue is being resolved and how are you resolving it (summarize project aims and objectives)?  How serious is the problem?  What does it matter?  The infectious agents under study cause significant production losses to domestic food animals and include agents of foreign animal diseases that threaten a key segment of the agricultural economy.  We are developing strategies for improved diagnostics and vaccine approaches to meet this challenge.  Mycoplasmas, mycobacteria, PRRSV and other viruses, and nematodes cause serious animal health problems in the United States and around the world.  In some cases, these agents may also pose a significant health risk to humans.  The economic impact of these agents to domestic producers exceeds 100 million dollars per annum.  Strategies for selective detection and vaccine protection are hampered by a lack of understanding regarding the infectious strategies, genetic diversity and the immunological properties of these agents.  2. List the milestones (indicators of progress) from your Project Plan.  (1) To identify and characterize vaccine targets for important viral and bacterial pathogens of livestock; (2) To identify and characterize important factors involved in optimizing host responses to intracellular and extracellular pathogens of livestock; (3) To perform epidemiologic and other surveys sufficient to identify and design enhanced diagnostic capabilities for economically important pathogens of livestock.  3. Milestones: In the 2004-06 reporting period, the Missouri team intends to 1) continue the extensive annotation and comparison of the genomes of M. capricolum and M. mycoides subspecies mycoides SC and other genomes of the M. mycoides cluster that become available, 2) identify in collaboration with consortium partners additional diagnostically useful genomic targets to discriminate among these agents, 3) define and experimentally verify the nature of their major surface antigens and assess their utility in diagnostic assays, 4) complete the genome sequencing of Mycoplasma bovis, another bovine pathogen outside the "mycoides cluster" and initiate annotation and comparisons with related species, 5) initiate the genome sequencing of M. bovine serogroup 7 and an additional M. mycoides subspecies mycoides SC isolate to provide a more complete database for identifying diagnostic targets and vaccine strategies for this important group of pathogens, and 6) complete the analysis of genomic islands in swine mycoplasmas.  In the following two years (2005-2007), studies to determine biological implications of these genomic analyses will continue, emphasizing areas of lateral gene transfer, surface architecture, genomic variation and the development of diagnostic probes.  Mycobacterium vaccine in cattle: The goals for this project have been curtailed in light of the move of the principal scientist in these studies, to another institution.  Future collaborations in this project may occur through this or alternative mechanisms.  PRRSV: The overall objective of this project is to develop a reverse genetics approach that will allow elucidation of PRRSV virulence determinants and mechanisms of pathogenesis.  During the coming year, we will construct chimeras with progressively smaller genome fragments substituted into the VR-2332 genome to determine the viral gene(s) responsible for the attenuation of chimera 4.  We will also initiate a study of the role of NF?ß in PRRSV modulation of the interferon response.  Ascaris sterilization using RNAi:  We are continuing to investigate cross species RNAi as a valuable tool for use with the emerging genomes of parasitic nematodes.  We will extend our current results with additional numbers of worms treated.  We are also in the process of determining whether feeding to Caenorhabditis bacteria that produce dsRNA from Ascaris will be successful; it represents a more efficient means to administer dsRNAs and could facilitate this basic research being translated into an anti-parasitic therapy.  We are also searching for additional Ascaris genes that could cause embryonic lethality or sterility.  Ideally we are looking for candidate targets that are nematode-specific to eliminate any possible harm to the vertebrate host.  With the completion of these two final aspects of the pilot project, we expect to have several candidate genes identified that could be used in clinical trials.  Long term, we envision adapting RNAi as a model anti- parasitic therapy.  4. What were the most significant accomplishments this past year?  This report serves to document research conducted under a Specific Cooperative Agreement between ARS and the University of Missouri. Collaborations are ongoing for the three-way consortium (USDA-ARS, University of Missouri, University of Connecticut) to address problems in foreign and domestic animal diseases, both in the design and development of new and improved vaccines as well as improved or new diagnostic tests. a. Mycoplasma diseases:  At the end of the last reporting period, the Missouri team and collaborating institutes determined the complete genome sequence of Mycoplasma capricolum subspecies capricolum Kid.  Computational and human annotation was continued throughout the current reporting period.  In addition, access through collaborators to the unpublished genome sequence of Mycoplasma mycoides subspecies mycoides SC, a foreign threat agent pathogen of cattle, allowed a comparison of these key species to be initiated.  The latter sequence was recently published (Genome Res. 14:221-224, 2004).  This first preliminary view of a genomic "framework" for the closely related "M. mycoides cluster" of bovine and caprine mycoplasma species has revealed genomic similarities at multiple levels and underscores the need for detailed comparisons of the genomes from multiple species in this cluster, along with selective other mycoplasmal pathogens, particularly those of cattle.  Multiple families of genes encoding surface proteins were identified in each genome.  Each family is predicted to be structurally or antigenically analogous (but not identical) between species and is subject to high frequency phase variable expression, an important feature that has been experimentally documented.  In addition to antigenic complexity that will affect strategies for development of protein based diagnostics and vaccines, the striking similarity of large genomic regions further suggested that effective nucleic acid-based diagnostics to discriminate species of the cluster will ultimately require targeted use of selected genomic differences.  In addition, mobile genetic elements were identified in each genome that may reveal the role of lateral gene transfer in genomic diversification, and may provide exploitable tools for genetic manipulation of these mycoplasmas.  Two additional mycoplasma pathogens of cattle, Mycoplasma bovine serogroup 7 (from the "mycoides cluster") and M. bovis, have been evaluated and experimentally characterized as high priority organisms for genome sequencing.  In this reporting period, we established a collaborative agreement with TIGR to complete the M. bovis (type strain PG45) sequence, a project entering the final closure stage. Computational and human annotation will begin immediately and carry through the next reporting period.  Initiation of the next genome- sequencing project will focus on M. bovine serogroup 7 and an additional, well-characterized isolate of M. mycoides subspecies mycoides SC.  In parallel studies of swine mycoplasmas (M. hyopneumoniae, M. hyorhinis, M. flocculare), islands of genes that have possibly been subject to rearrangement through their linkage to common mobile genetic elements were further characterized.  They appear to reflect lateral gene transfer that has shaped the genomic architecture of these pathogens, which reside in a common host niche. b. Mycobacterium vaccines in cattle: In this project period, the PI for this component of the program moved from MU to UTMB in Galveston.  The project is being completed with a final vaccine trial being undertaken presently at NADC.  During the reporting period, initial trials were completed to evaluate costimulatory molecules as a means to enhance the development of memory and effector cytolytic T cells in cattle.  An aerosol challenge model with Mycobacterium bovis was used to determine the potential of this approach using a subunit DNA vaccine platform.  Initial studies demonstrated reduced pathology in costimulatory molecule treated animals, compared to controls receiving vector only.  Results were analyzed in comparison to M. bovis BCG, the current standard for TB vaccines.  Additional studies evaluated the effector pathways involved in direct killing of intracellular mycobacteria.  Granulysin and perforin homologs were identified for the bovine.  These studies have indicated that potent antimicrobial activities occur in various domains of the granulysin molecule, the only known lytic peptide with direct anti-mycobacterial activities.  A mouse homolog for this protein has not been identified to date. c. PRRSV: Using the published PRRSV infectious clone (J. Virol 77:3702- 3711), which is derived from the virulent prototype isolate VR-2332, a series of chimeras have been constructed with the corresponding genome fragments of the attenuated vaccine strain Ingelvac ATP.  In vitro growth curves demonstrated that all chimeras have similar growth properties in Marc-145 cells.  However inoculation of pigs demonstrated that chimera 4 (which incorporates the 3' end of the attenuated viral genome into VR- 2332) resulted in markedly reduced lung lesions at 14 days p.i.  Viremic titers were also lower for this construct compared to the parental (clone- derived) strain.  The in vitro interferon phenotype of PRRSV field strains has been characterized.  Marked strain differences were noted although all isolates tested suppressed the interferon response in vitro. d. Ascaris sterilization using RNA interference (RNAi):  We had previously identified two expressed genes in Ascaris suum, actin and iff- 1 (initiation factor five A-1), that have at least one region of a greater than 21-nucleotide exact match with the model organism, the free- living nematode Caenorhabditis elegans and no 21-nt match with mammalian DNA.  After amplifying an ~500-bp fragment from each gene from reverse transcribed Ascaris ovarian RNA and adding T7 polymerase sites on both ends, dsRNAs from each were produced and tested for their ability to sterilize by RNAi either the injected worm or its offspring.  Both these genes have worked to cause sterility using C. elegans as a tester strain.  The degree of this effect of the Ascaris gene approaches similar effects of RNAi with the endogenous C. elegans gene.  We have used C. elegans for these initial studies because parasitic Ascaris worms, although ubiquitous in domestic swine, cannot be maintained in culture in the laboratory.  Several other genes have also been identified that meet the criteria used to select the two successful genes and these are currently being tested. e. Additional viral pathogens: In this period, two exploratory projects were initiated to exploit the expertise of well-established MU faculty to study the molecular pathobiology of viral diseases affecting swine and cattle.  Porcine circovirus: The long-term goal of this pilot project is to identify and characterize the viral determinants of porcine circovirus 2 (PCV2) that contribute to the pathogenicity of this emerging swine pathogen.  Critical aspects of the replication of PCV in tissue culture systems were examined. PCV RNAs were identified and quantified following infection of in PCV-free PK15 cells and in primary porcine lymphocytes.  The functional significance of the PCV minor RNAs and their putative protein products in viral replication are now being assessed.  We will address whether porcine parvovirus (PPV) enhances PCV2 replication and virus production in swine lymphocytes.  PPV is known to increase PCV2 pathogenesis in pigs.  Successful completion of the experiments proposed should give a much more detailed characterization of the expression of PCV RNAs and the role that the various nonstructural proteins play during infection.  Bovine herpesvirus 1 latency: Infection of cattle with bovine herpes virus (BHV-1) can result in respiratory disease, vulvovaginitis, balanoposthitis, abortion, and possibly neurological disease.  Following replication at the initial site of infection, BHV-1 establishes a latent infection in sensory ganglia neurons.  Periodically, virus is reactivated from neurons and transported via axonal transport back to the initial sites of infection.  In general the molecular mechanisms that regulate latent infections of BHV-1 are not well understood and there are no in vitro models for studying regulation.  The HSV-1 IE proteins ICP4 and ICP0 are key transcriptional regulators of HSV-1 genes.  Studies with transgenic mice containing ICP4 and ICP0 reporter constructs have shown that neurons differentially regulate these viral promoters in the absence of viral proteins and that the ICP0 promoter was regulated in neurons in transgenic mice by stimuli know to reactivate virus in vivo, demonstrating the need for host transcription factors.  The following hypothesis is being examined: BHV-1 IE gene promoter (IEtu1) is regulated by host neuronal transcription factors in vivo in the absence of viral proteins.  In order to examine the regulation of the BHV-1 IEtu1 promoter in vivo, transgenic mice will be generated that contain the IEtu1 promoter fused to the E. coli ß-galactosidase coding sequence.  As a control, a construct containing a late gene, gC, promoter fused to the lacZ coding sequence will be used.  UV irradiation, hyperthermia, and glucocorticoids are stimuli that are known to cause reactivation of alphaherpesviruses from neurons.  Experiments will be performed to determine whether the BHV-1 IE promoter responds to signals generated by these reactivation stimuli.  5. Describe the major accomplishments over the life of the project, including their predicted or actual impact.  National Program 103, Animal Health (100%).  This research addresses Outcome 2, a safe and secure food and fiber system, and falls within both specific goals 2.1.2 and 2.1.4 of the ARS strategic plan.  6. What science and/or technologies have been transferred and to whom?  When is the science and/or technology likely to become available to the end- user (industry, farmer, other scientists)?  What are the constraints, if known, to the adoption and durability of the technology products?  The project has been underway for four years (since 3-1-00).  Mycoplasmal genomic sequences wll be deposited in public databases as (M. capricolum) or before (M. bovis) they are annotated.  Some delays in reaching these objectives occurred during the current period, reflecting the need to refine annotation methodology, coordinate collaborative annotation efforts on two related genome sequences, and acquire the most recent comparative data.  Technology transfer from these datasets will occur when specific applications are demonstrated.  No constraints to the data are imposed.  Prototype diagnostic applications are anticipated in the next two years.  Vaccine material for tuberculosis is anticipated within the next two years.  Adjuvant materials developed in this study show promise in tests using chimeric mice and can be applied to several vaccines under study within the consortium.  Constraints may apply to the use of commercial materials obtained within the defined conditions of Material Transfer Agreements.  New PRRSV infectious clones should be available within the next year and subsequent investigation is projected to provide potential vaccine reagents to commercial swine producers and scientists in the following several years.  RNAi technology as an anti-parasitic terilization therapy will be tested thoroughly in the coming year.  Its application across the spectrum of animal parasitic diseases will be regulated by the pace by which parasite genomic sequence data becomes available. 7. List your most important publications in the popular press and presentations to organizations and articles written about your work.
1. Calcutt, M. J., T. Mutangadura, S. Walker, H. S. Williamson, J. R. Clark, and J. B. March. 2004. A genome sequence survey of M. capricolum subsp. capripneumoniae F38 identifies genes for both conserved as well as subspecies variable surface proteins. Abstr. 15th International Congress of the International Organization for Mycoplasmology, Abstract 232, p. 138.
2. Estes, D. Mark. 2004. Workshop-Dendritic cell regulation of Ig isotype expression in cattle.  7th International Veterinary Immunology Symposium- Quebec City, Quebec, July 25-31, 2004.
3. Endsley, J. E. 2004. Characterization of a bovine homologue of granulysin and NK-lysin with broad spectrum antimicrobial activity. 7th International Veterinary Immunology Symposium, Quebec City, Quebec, July 25-31, 2004.
4. Ge, G., and K. Bennett. 2004. Cross-species RNAi; using two Ascaris genes to sterilize C. elegans. 14th International C. elegans Meeting. UCLA, June 2004.
5. Hvinden, M. L., T. Mutangadura, K. S. Wise, and M. J. Calcutt. 2004. Identification of three chromosomal loci in Mycoplasma bovine group 7 that contain genes encoding phase-variable lipoproteins. Abstr. 15th International Congress of the International Organization for Mycoplasmology, Abstract 233, p. 139.
6. Hvinden, M. L., T. Mutangadura, K. S. Wise, and M. J. Calcutt. 2004. Identification of a gene family of phase variable lipoproteins in Mycoplasma bovine serogroup 7. Abstr. 104th Gen. Mtg. Amer. Soc. Microbiol., G-021.
7. Kent, B. N. and M. J. Calcutt. 2004. Towards an expansion of the Mycoplasma genetic tool box. Abstr. 15th International Congress of the International Organization for Mycoplasmology, Abstract 243, pp. 144-145.
8. Lee, S-M., Kleiboeker, S.B. 2004. Porcine arterivirus modulates NF-KB activation in vitro. American Society for Virology XXIIIth Annual Meeting.
9. Lee, S M, SK Schommer, S.K., Burke, C.E. Kleiboeker, S.B. 2003. IFN sensitivity and inducing capability differ among PRRSV field isolates which suppress IFN induced by other viruses. American Society for Virology XXIIth Annual Meeting.
10. March, J. B., J. R. Clark, C. D. Jepson, M. Totsika, and M. J. Calcutt. 2004. Bacteriophage mediated DNA vaccination against Mycoplasma mycoides subsp. mycoides SC. Abstr. 15th International Congress of the International Organization for Mycoplasmology, Abstract 5, p. 46.
11. Martin, T., S. Walker, and M. J. Calcutt. 2004. A variable locus of putative surface proteins in Mycoplasma mycoides subspecies mycoides biotypes. Abstr. 15th International Congress of the International Organization for Mycoplasmology, Abstract 259, p. 153.
12. Mutangadura, T., J. B. March, H. S. Williamson, and M. J. Calcutt. 2004. Distribution of ICEC in "M. mycoides cluster" mycoplasmas. Abstr. 15th International Congress of the International Organization for Mycoplasmology, Abstract 244, p. 145.
13. Röske, K., M. J. Calcutt, M. F. Foecking, J. I. Glass, and K. S. Wise. 2004. Iterative use of a versatile protein motif distributed in diverse surface proteins of the M. mycoides phylogenic cluster. Abstr. 15th International Congress of the International Organization for Mycoplasmology, Abstract 54, pp. 73-74.
14. Röske, K., M. J. Calcutt, J. I. Glass, A. Persson, J. Westberg, and K. S. Wise. 2004. Comparative genomic analysis of two species in the Mycoplasma mycoides phylogenetic cluster. Abstr. 104th Gen. Mtg. Amer. Soc. Microbiol., G-027.
15. Waters, W.R., B.J. Nonnecke, M.V. Palmer, S. Robbe-Austermann, J.P. Bannatine, J.R. Stabel, D.L. Whipple, J.B. Payeur, D.M. Estes, J.E. Pitzer, and F.C. Minion. 2004. Differentiation of Mycobacterium bovis infection of cattle from M. avium subsp. avium and M. avium subsp. paratuberculosis infection using a recombinant ESAT-6:CFP-10 fusion protein. Clin. Diagn. Lab. Immunol. 11:729-35.
16. Carter D.B., Lai, L., Park, K.W., Samuel, M., Lattimer, J.C., Jordan, K.R., Estes, D.M., Besch-Williford, C., Prather, R.S. Phenotyping of transgenic cloned pigs.  Cloning and Stem Cells. 2002. v. 4. p. 131-145.

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 OCT 2005 TERM: 30 SEP 2006
INVESTIGATOR: Schultz, L.; Nagy, D. W.
PERFORMING INSTITUTION: Veterinary Medicine & Surgery.  University of Missouri.  Columbia, Missouri 65211
SUBJECT:  Specificity of serology in the diagnosis of Johne's disease in endemic herds.
NON-TECHNICAL SUMMARY: Reported specificity of the Johne's ELISA is 95 to 100 percent.  The documented performance of this test is much higher than we perceive clinically.  A lower specificity is supported by our preliminary data set.  The proposed research will provide a more accurate assessment of the specificity of serologic tests for Mycobacterium avium paratuberculosis. OBJECTIVES: The scientific objectives of the project are to: 1) characterize the specificity of the ELISA test in herds with infected cattle, and 2) evaluate the utility of expanded tessting protocols in seroogically positive dairy cows.
APPROACH: Over a 2-year period, 70 cattle will be drawn from dairy herds that are currently enrolled in the Missouri State Johne's Control Program.  Herds with an apparent prevalence of plus-minus 10 percent will be eligible for participation in the study.  Sampling will be restricted to cattle with positive ELISA results associated with annual whole herd serologic testing.  Client-owned animals with one positive serologic test for Mycobacterium avium subspecies paratuberculosis will be eligible for inclusion.  Inducements for participation will be explained.  Enrolled cattle will either be transported to the Univ of Missouri Food Animal Clinic or a sampling team will travel to the farm for collection.  True positive status will be defined as a cow with a positive isoltion of MAP from either biopsied tissue or feces.  Cattle with initial negative culture results later identified as positive by follow up of fecal cultures will be classified as true positives as well.  The specificity of the ELISA after initial sampling and after follow up fecal cultures on cows with initial negative cultures will be calculated.  After completion of the data collection, an economic analysis of the intensive sampling protocol will be performed using decision tree methodology.  The models used will permit all possible permutations of testing strategies.
PROJECT CONTACT:     
     Name: Dusty Nagy  Phone: 573-882-6857  Fax: 573-884-5444
     Email: NagyD@missouri.eduItem

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: EXTENDED
CONTRACT/GRANT/AGREEMENT NO: 00-35208-9192 PROPOSAL NO: 2000-01238
START: 01 SEP 2000 TERM: 31 AUG 2003 GRANT YR: 2000 GRANT AMT: $75,000
INVESTIGATOR: Hall-Stoodley, L.
PERFORMING INSTITUTION: Center for Biofilms Eng.  Montana State University.  Bozeman, Montana 59717
SUBJECT:  Mycobacterium paratuberculosis survival in biofilm.
NON-TECHNICAL SUMMARY: Mycobacterium paratuberculosis causes paratuberculosis or Johne's disease in wild and domestic ruminants.  Paratuberculosis is responsible for significant economic losses in the U.S. particularly in dairy herds.  Once detected, elimination of the organism in a herd is problematical and may take several years.  Although infection occurs via the fecal-oral route, little is known about the ability of this organism to survive in the environment and its resistance to control efforts.  Mycobacteria aggregate and form clumps, which may influence their abillity to survive environmental stresses.  It is now recognized that many types of bacteria aggregate on surfaces to form biofilms in the environment.  Attached bacterial communities appear to better survive deficient growth conditions, temperature fluctuations and chemical treatment.  Recent evidence also shows that other species of mycobacteria form biofilms.  M. paratuberculosis within biofilms could serve as a potential reservoir of Johne's disease and facilitate persistence even after eradication efforts have been implemented.  By investigating the biofilm forming capacity of M. paratuberculosis, we will examine a possibly novel mode of this pathogen's survival.  This research will provide information toward a better understanding of the survival of M. paratuberculosis in the environment (including water supplies), improved detection of the organism, and possibly superior methods for controlling its spread.
OBJECTIVES: To investigate whether cell aggregation attachment to different surfaces by M. paratuberculosis influences viability following sub-optimal growth conditions.  Determine whether aggregation and biofilm formation enhances the resistance to adverse conditions such as heat and chemical treatment.  Develop M. paratuberculosis-specific probes for fluorescent in situ hybridization (FISH) for microscopic analysis of M. paratuberculosis.
APPROACH: M. paratuberculosis will be grown in standard laboratory medium and subjected to treatment regimes designed to reduce bacterial aggregation.  Following treatment, cells will be allowed to settle due to gravity (single cells remain in the top 2-3 mls, while larger clumps settle quickly to the bottom).  After separation single and clumped cells will be examined for viability and susceptibility/resistance to temperature, chemical and nutrient stress.  M. paratuberculosis will be evaluated for surface attachment and biofilm formation under flow conditions on a variety of surfaces using microscopic techniques.  Attachment and growth will be monitored over time and quantitatively assessed using light microscopy.  Three-dimensional structural heterogeneity of M. paratuberculosis biofilms will be further characterized using scanning electron microscopy and confocal microscopy.  Fluorescent in situ hybridiztion (FISH) probes will be developed using ribosomal RNA sequences and labeled with appropriate fluorochromes.  These probes will be used to develop a protocol for monitoring the organism in situ using fluorescent and confocal scanning microscopy.
PROJECT CONTACT:     
     Name: Hall-Stoodley, L.  Phone: 406-994-7382.  Fax: 406-994-6098
     Email: luanne_h@erc.montana.edu

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT PROJ STATUS: NEW
START: 28 FEB 2003 TERM: 01 JAN 2005
INVESTIGATOR: Bannantine J P; Barletta R
PERFORMING INSTITUTION: University of Nebraska.  Lincoln, Nebraska 68583
SUBJECT:  Functional genomic analysis of Mycobacterium paratuberculosis (Univ. of NE).
OBJECTIVES: The overall objective of this agreement is the development of diagnostic tests and control measures for Johne's Disease in cattle as outlined in the USDA-NRI grant #2002-02228.  The specific objectives of this cooperative research project are to identify unique antigens from the genome of Mycobacterium paratuberculosis, incorporate these antigens into a diagnostic test, and evaluate this test in dairy cattle herds.
APPROACH: The genome sequence of a bovine isolate of M. paratuberculosis will be analyzed to find DNA sequences which differentiate between M. paratuberculosis and other closely related mycobacteria.  Efforts will then be made to clone, express and purify proteins from these novel M. paratuberculosis sequences.  Because of the potential for 50 or more genes to be evaluated by these labor intensive methods, purification of proteins encoded by unique genes must be split between both parties.  The resulting purified proteins will be evaluated in a variety of immunological assays to determine which ones are best for diagnostic test development.  The test will be optimized and used in whole-herd field tests of known and unknown infection status.
PROGRESS: 2003/10 TO 2004/094.  What were the most significant accomplishments this past year? D. Progress Report.  This report serves to document research conducted under a specific cooperative agreement between ARS and the University of Nebraska.  This specific cooperative agreement represents a subcontract of USDA-CSREES funds to the University of Nebraska.  Additional details of research in the report for the parent project 3625-32000-062-00D Understanding Host- Pathogen Interactions for the Diagnosis and Control of Paratuberculosis (Johne's). This collaborative research project between ARS (NADC) and the University of Nebraska encompasses measures to ensure animal health through an increased understanding of the biology of Mycobacterium paratuberculosis, the bacterial agent that causes Johne's disease.  This project has the objective of purifying recombinant M. paratuberculosis proteins.  These recombinant proteins/antigens have been expressed and are being analyzed for diagnostic utility using well characterized dairy cattle herds.
PUBLICATIONS: 2003/10 TO 2004/09
No publications reported this period.

 

PROJ TYPE: STATE PROJ STATUS: EXTENDED
START: 13 DEC 1990 TERM: 31 DEC 2020 FY: 2005
INVESTIGATOR: Schmitz, J. A.; Doster, A. R.; Johnson, J. L.
PERFORMING INSTITUTION: Veterinary and Biomedical Sciences.  University of Nebraska.  Lincoln, Nebraska 68583
SUBJECT:  Vet diagnostic lab system: diagnostic surveillance & disease investigation in NE livestock & poultry.
NON-TECHNICAL SUMMARY: Diagnosis of animal diseases requires sophisticated technology, equipment and trained personnel.  This project provides personnel expertise equipment and facilities for disease investigation and diagnosis.
OBJECTIVES: 1. Esta,+k!a management structure & operating program for a unified state- wide veterinary diagnostic laboratory system.  2. Provide timely & accurate disease diagnosis & surveillance for the Nebraska livestock industry.  3. Provide information & data for research projects currently conducted in the Department of Veterinary Science.  Focus attention on emerging disease syndromes which need additional investigation.  4. Provide continuing education for students, clients, and veterinary producers through formal class session, off-campus continuing education programs, interaction with clients on case materials, and contact with departmental extension veterinarians.
APPROACH: 1. Establish a single revolving account for all three laboratories for expenditures of funds.  2. Discontinue inter-laboratory charging.  3. Establish base budgets from appropriated funds for each laboratory & seek funding on the basis of a unified front.  4. Establish uniform quality control practices to insure a high degree of accuracy.  5. Develop a computer system to manage laboratory records at all three laboratories.  6. Prepare monthly summaries of laboratory activities, disease trends, seasonal patterns, etc.
PROGRESS: 2004/10 TO 2005/09  The lab received 15,330 requests for diagnostic assistance from producers.  Foreign animal diseases are included in the differentials and excluded based on laboratory examination or clinical data.  We assist state health officials with monitoring programs for M paratuberculosis, avian influenza, Newcastle disease, classical swine fever, CWD and West Nile virus.  A serologic survey of West Nile exposure and risk factors in dogs is in progress.  Equine serologic response to West Nile was studied and a poster presented with the findings.  Testing for BVDV PI status was performed on 178,000 calves.  Positive animals are removed from production to prevent spread of virus.  This is the third year of the CWD prevalence study in Nebraska and results should be summarized for publication next year.  We continued to support a study of Johne’s prevalence in Nebraska as a representation of prevalence in extensive beef cattle operation of the Great Plains and the monitoring program to reduce the incidence of Johne’s disease.  We investigated the prevalence or Neospora caninum in Nebraska deer and demonstrated that a deer coyote cycle may exist with infection occasionally spilling into beef cattle populations.  Prevalence in deer was estimated at 2-5%.  Outbreaks of abortion related to Neosporosis were investigated and one herd with vaccine failure was investigated to characterize risk factors that may have contributed to the increased abortion in the face of vaccination.  Dwarfism investigations continued and DNA samples were shared with ISU for genetic analysis.  A putative site was found on chromosome 6 associated with the trait.  A detailed investigation of Kochia and Rumex intoxication provided data on outcomes that will be useful to educate producers faced with similar exposure issues.  Investigations into deaths of wildlife and zoo animals led to recognition of Tsukamurekka Pulmonis as a new differential for granulomatous disease in zoo mammals.  Health, reproductive status, and agricultural chemical exposure were accessed in river otters.
IMPACT: 2004/10 TO 2005/09  BVDV infections rate at 1% means over 1,700 persistently infected calves, the reservoir for virus were eliminated from production facilities.  West Nile testing supported state wide monitoring and control programs and significant decreases in animal and human infections were reported in 2003.  Studies in horses demonstrated the reduced utility of IgM serology in endemic regions.  It appears IgM response is muted in clinical infections from vaccinated and previously exposed animals.  Routine surveillance testing supports free movement of livestock products across state and national boundaries and identifies endemic diseases providing useful data for management and treatment of diseases that affect livestock profitability.  The CWD and Johne’s surveys will provide base line statistically valid prevalence data for the state so that effectiveness of intervention can be measured.  Identification of and publications describing, emerging diseases of domestic and wild animals aids those responsible for animal health in humane management of those resources.
PUBLICATIONS: 2004/10 TO 2005/091.
1.
Perez S., M. Inman, A. Doster, C. Jones. The bovine herpesvirus 1 latency gene stimulates growth and pathogenesis in tonsils of acutely infected calves. 2005. Accepted.  The Journal of Clinical Microbiology. J. Series #143152.
2.
Kelling, C. L. Hunsaker, B.D., Steffen, D.J.  Characterization of protection in experimentally-infected calves from systemic infection or disease by vaccination with modified-live noncytopathic bovine viral diarrhea virus type 1. 2005.  The Journal of Veterinary Research. J Series #14376
PROJECT CONTACT:     
     Name: Schmitz, J. A.  Phone: 402-472-2952.  Fax: 402-472-9690
     Email: JSchmitz@unl.edu

 

PROJ TYPE: HATCH PROJ STATUS: TERMINATED
START: 06 OCT 1998 TERM: 30 SEP 2003 FY: 2003
INVESTIGATOR: Smith, D. R.
PERFORMING INSTITUTION: Veterinary Biomedical Science.  University of Nebraska.  Lincoln, Nebraska 68583
SUBJECT:  Strategic plan for an IANMR Disease Research Program at the Dept of Vet. & Biomedical Sciences.
OBJECTIVES: The objective of the Field Disease Research (FDR) program is to facilitate collaboration in veterinary field disease research.  The FDR program will coordinate the expertise & resources of the Dept. of Vet. & Biomedical Sciences (VBS) & individuals from other units to research animal & public health concerns related to animal production systems.  These animal & public health issues should be: Field related problems associated with Nebraska animal populations.  Economically important to the animal industries of Nebraska, & unsolved by conventional veterinary intervention, and/or A Public health concern because it is perceived that animal health or animal production systems contribute to a human health risk.  Within the scope of the extension, research, and diagnostic mission of VBS.
APPROACH: The FDR program approach would begin with the recognition and definiation of animal and public health problems by team members.  Research trials to investigate these problems would be discussed & prioritized at weekly FDR.  The prioritization of research trials would depend on 1) importance to animal & public health, 2) faculty interest & expertise, and 3) availability of funding and additional needed resources.  Coordinated teams might then design and conduct field studies as investigational pilot studies or formal funded research projects.  The progress of investigations would be presented regularly to the entire FDR program group for discussion and further refinement of hypotheses and additional research as necessary.  Study design and statistical analysis will be moderated by the veterinary epidemiologists within VBS and faculty in the Department of Biometry.
PROGRESS: 1998/10 TO 2003/09  The Field Disease Research Program uses a team approach to solve problems of animal or human health related to livestock production systems.  Previous work model diagnostic strategies for classifying herds by Johne’s disease status has resulted in a USDA funded study to use serial testing (ELISA serology confirmed by fecal culture) to determine the prevalence of Mycobacterium avium spp. paratuberculosis-infected beef herds and to validate a herd-risk-assessment instrument.  Deterministic models were used to show that pre-purchase testing for BVDV-persistent infection using microscopic examination of immunohistochemistry-stained skin biopsies could effectively prevent the introduction of cattle that serve as the reservoir of BVDV and the primary source of transmission of the virus.  The benefits of pre-purchase testing are greater as the number of head within a lot increases since the probability of introducing at least one BVDV-PI animal increases.  Multi-year intervention trials are currently underway in a commercial cow-calf operation to test the use of two population-based testing strategies.  One strategy is microscopic examination of immunohistochemistry-stained skin biopsies to detect and remove calves born persistently infected with BVDV.  The second test strategy is the use of serology among unvaccinated sentinel calves to detect evidence of virus exposure during the period when their dams are carrying fetuses susceptible to BVDV infection and subsequent development of the PI state. IMPACT: 1998/10 TO 2003/09  BVDV is an economically important viral disease of cattle. Computer models and field studies are being used to validate the use of population-based diagnostic strategies for BVDV biocontainment and biosecurity.
PUBLICATIONS: 1998/10 TO 2003/09
Smith DR. Grotelueschen, D. 2004. Biosecurity and biocontainment of BVDV. Vet Clin N Am Food Animal Pract., 20(1), in press

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 99-35204-7789 PROPOSAL NO: 1999-02316
START: 01 SEP 1999 TERM: 31 AUG 2002 FY: 2002 GRANT YR: 1999 GRANT AMT: $210,000
INVESTIGATOR: Barletta, R. G.
PERFORMING INSTITUTION: Veterinary and Biomedical Sciences. University of Nebraska. Lincoln, Nebraska 68583
SUBJECT:  Identification of Mycobacterium paratuberculosis virulence determinants.
NON-TECHNICAL SUMMARY: Paratuberculosis, or Johne's disease, is a granulomatous enteritis of ruminants which is prevalent in those areas of the United States with high concentrations of cattle. Important questions about how bovine macrophages interact with M. paratuberculosis remain unanswered.
OBJECTIVES: 1. Develop novel strategies for the positive selection of transposon mutants with reduced replication in bovine macrophages.  2. Screen for transposon mutants with reduced replication and/or survival in bovine macrophages.
APPROACH: Bovine macrophages will be infected with M. paratuberculosis transposon mutants with pools of 10 to 20 mutant strains at a time, using a multiplicity of infection of 10:1.  Infected macrophages will be incubated at 39 degree C in the presence or absence of the fluoroquinolene Bay y 3118.  The basis for this strategy is that mutants which can multiply within macrophages will be killed by Bay y 3118, whereas mutant strains that are defective in their ability to multiply intracellularly will escape killing by the drug.  Both the mutants enriched by the Bay counter-selection strategy & those displaying reduced intracellular replication in the unbiased screen will be isolated and characterized genetically & biochemically.  For each attenuated mutant, the DNA fragment containing the transposon insertion will be cloned into a plasmid & sequenced.  Comparison to databases will be used to identify the mutated gene responsible for the attenuated phenotype.  To verify that the gene inactivated by the transposon is responsible for the observed phenotype, a complementation system will be developed to introduce back the wild-type gene.  The effects of agents that decrease (interferon-gamma) or increase (growth hormone) intracellular growth of wild-type and mutant strains will be also tested by measuring intracellular replication via a radiometric estimation method.
PROGRESS: 1999/09 TO 2002/08  Mycobacterium paratuberculosis, the etiologic agent of Johne's disease in ruminants, causes an estimated $1.5 billion annual loss to the dairy industry alone.  Few M. paratuberculosis virulence determinants have been characterized.  The goal of this project was to identify the M. paratuberculosis genes encoding virulence determinants, to study their intracellular expression, and to elucidate their role in pathogenesis by performing a detailed characterization of the interaction of M. paratuberculosis wild type and mutant strains with bovine macrophages.  Using a fluorescent live-dead stain and a GFP-expressing strain of M. paratuberculosis, we determined that in monocyte-derived primary macrophages, 16% of viable bacteria were trafficked to lysosomes.  Likewise 5% of viable bacteria were trafficked to lysosomes in the immortalized BoMac macrophage cell line.  All nonviable bacteria co-localized with lysosomal markers in both cell types.  IFN-gamma stimulation significantly increased the percentage of viable bacteria in lysosomes of primary macrophage from 5% to 23%.  Conversely, stimulation of BoMac cells did not affect trafficking of viable bacteria, since 3% were co-localized to lysosomes for stimulated cells, and 5% were co-localized for unstimulated macrophages.  The lysosomal pH was 4.1 and 4.7 for non-infected primary macrophages and BoMac cells respectively.  It was concluded that 1) M. paratuberculosis must be metabolically active upon phagocytosis to avoid trafficking to lysosomes; 2) both macrophage cell types can form fully mature, acidified vacuoles; and 3) infection of bovine macrophages with M. paratuberculosis prevented phagosome acidification yielding pH values of 6.2 and 5.9 for primary and Bomac macrophages, respectively.  Using transposon Tn5367, we created a bank of 13,536 random mutants using the virulent M. paratuberculosis genome sequencing strain K-10.  This mutant bank was screened for resistance and susceptibility to antimicrobial agents, colony morphotypes, survival in bovine macrophages, and for specific mutants by PCR.  Sixty-three mutants were hypersusceptible to D-cycloserine (DCS), one had an irregular colony morphology, three mutants displayed reduced survival in bovine macrophages, and one transposon insertion mutant was mapped 30 nucleotides downstream from the sodA gene.  Further characterization of these mutants may lead to the identification of key M. paratuberculosis virulence determinants.  The characterization of M. paratuberculosis mutants that are unable to replicate and/or survive in bovine macrophages may define new virulence determinants that could be targets for new vaccines and therapeutic approaches.
IMPACT: 1999/09 TO 2002/08  Paratuberculosis causes an estimated $1.5 billion annual loss to the U. S. dairy industry alone.  The characterization of M. paratuberculosis mutants is of importance to identify targets for the prevention, control and eventual eradication of Johne's disease.
PUBLICATIONS: 1999/09 TO 2002/08
Harris, N.B., D.K. Zinniel, M.-K. Hsieh, J.D. Cirillo, R.G. Barletta. 2002.  Cell sorting of formalin-treated pathogenic Mycobacterium avium paratuberculosis expressing GFP.  Biotechniques 32:522-527
PROJECT CONTACT:     
     Name: Barletta, R. G.  Phone: 402-472-8543  Fax: 402-472-9690
     Email: braul@crcvms.unl.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: TERMINATED
START: 01 OCT 1999 TERM: 30 SEP 2005 FY: 2005 INVESTIGATOR: Barletta, R. G.
PERFORMING INSTITUTION: Veterinary and Biomedical Sciences.  University of Nebraska.  Lincoln, Nebraska 68583
SUBJECT:  Molecular genetic analysis of Mycobacterium paratuberculosis and related mycobacterial pathogens.
NON-TECHNICAL SUMMARY: Mycobacterium paratuberculosis is the etiologic agent of Johne's disease, an infectious disease affecting all ruminants, characterized by diarrhea, weight loss, and ultimately death.  The purpose of this study is to learn more about the mechanisms of pathogenesis with the goals of developing more effective disease control strategies.
OBJECTIVES: 1) Develop a selection strategy to identify M. paratuberculosis transposon mutants with reduced replication in bovine macrophages; 2) characterize candidate attenuated mutants at the molecular level and test their virulence in animal models; 3) identify, clone, overproduce, and characterize immunogenic M. paratuberculosis secreted and cellular proteins; and 4) identify drugs or drug combinations effective against M. paratuberculosis.
APPROACH: Herein is proposed a novel methodology to select for mutants with reduced ability to survive and multiply in bovine macrophages from a transposon mutant bank.  A fluoroquinolone will be used to kill intracellularly growing bacteria and select for mutants unable to replicate in bovine macrophages.  For mutants that demonstrate an attenuated phenotype in their interaction with bovine macrophages, the patterns of gene expression in intracellular and extracellular conditions will be compared and the virulence of candidate attenuated mutants will be tested in beige mice.  To test the role of superoxide dismutase and alkylhydroperoxidase, the corresponding genes will be subcloned into E. coli expression vectors and purified in large amounts.  The purified antigens will be used in assays for humoral and cellular immunity.  To identify drugs or drug combinations effective against M. paratuberculosis, a variety of M. paratuberculosis strains isolated from cattle and Crohn’s's disease patients will be tested for drug susceptibility. M. paratuberculosis strains will be grown and transformed with plasmids carrying either the firefly luciferase or the green fluorescent protein reporter genes.  The minimal inhibitory concentrations of individual drugs or pair-wise drug combinations will be determined in broth culture or M. paratuberculosis infected macrophages.  For drug combination experiments, isobolograms will be constructed to determine if the drug interaction is indifferent, synergistic, or antagonistic.
PROGRESS: 1999/10 TO 2005/09  Johne’s disease is a chronic enteritis with worldwide distribution and a significant impact on the world economy.  In the United States, losses to the cattle industry have been estimated at $1.5 billion per year.  Koch postulates have been applied to demonstrate that Mycobacterium avium subsp. paratuberculosis (MAP) is the etiologic agent.  The objectives of this project were to: 1) develop a selection strategy to identify MAP transposon mutants with reduced replication in bovine macrophages; 2) characterize candidate attenuated mutants at the molecular level and test their virulence in animal models; 3) identify, clone, overproduce, and characterize immunogenic MAP secreted and cellular proteins; and 4) identify drugs or drug combinations effective against MAP.  The following results were obtained during the lifetime of the project.  In objective 1, a transposon mutant bank of MAP K-10 was created using the mycobacterial transposon Tn5367 carrying a kanamycin resistance marker.  A total of 13,536 individual mutants were collected and evaluated for replication in a bovine macrophage cell line.  Evaluations of bacillary ingestion and intracellular growth were performed by microscopic examination of acid fast-stained monolayers on glass coverslips.  Results indicated that the fraction of macrophages infected with wild-type MAP K-10 is maintained over four days of incubation.  During this period, a two-fold increase in the number of bacilli per infected macrophage was observed, demonstrating that MAP multiplies in tissue culture.  These data were similar for the mutant strains tested.  Additional experiments used the fluoroquinolone Bay y 3118 to selectively enrich pools of mutants for those unable to grow in minimal media lacking amino acids of interest.  These mutants are not killed in the presence of the drug since they are not actively replicating.  Using this positive selection, 107 auxotrophic mutants were isolated.  In objective 2, nine colony morphology mutants were identified by visual screen of the complete mutant bank.  One mutant (4H2) was shown to be replication deficient and thus attenuated in bovine macrophages.  In objective 3, analysis of the MAP superoxide distmutase gene (sodA) indicated that the 207 amino acid encoded protein was secreted into culture supernatant fluids.  The immunogenicity of antigen 85 and its potential as a subunit vaccine were also demonstrated.  Furthermore, the immunodominant determinants of MAP protein P34 were analyzed and found to have diagnostic significance.  In objective 4, the mutant bank was also screened to identify mutants susceptible to the peptidoglycan synthesis inhibitor D-cycloserine.  We identified 63 mutants that were unable to grow at 20 microgram per ml of drug, while wild-type and most of the mutant strains were able to grow unimpaired under this condition.  In addition, this project was instrumental in securing additional extramural funds from USDA competitive programs (USDA BARD IS-2564-95, USDA BARD US-3413-03, USDA-NRI 99-35204-7789, USDA-NRI 2004-35204-14231 and USDA-NRI 2004-35605-14243) necessary to expand our research. IMPACT: 1999/10 TO 2005/09  Paratuberculosis and related mycobacterioses cause an estimated one billion dollars in annual losses to U.S. agriculture alone.  Molecular genetic studies of MAP and related pathogens may aid in the development of a vaccine to control JD and bovine tuberculosis.
PUBLICATIONS: 1999/10 TO 2005/09
Thoen, C.O., and R. G. Barletta. 2005. Chapter 4: Pathogenesis, In Press. In C.O. Thoen, J.H. Steele and M.J. Gilsdorf (eds.) Mycobacterium bovis Infection in Animals and Humans, Second Edition. Blackwell Publishing
PROJECT CONTACT:     
     Name: Barletta, R. G.  Phone: 402-472-8543  Fax: 402-472-9690
     Email: RBarletta@unl.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: EXTENDED
CONTRACT/GRANT/AGREEMENT NO: 2004-35204-14231 PROPOSAL NO: 2003-02206
START: 01 FEB 2004 TERM: 31 JAN 2007 FY: 2005 GRANT YR: 2004 GRANT AMT: $270,000
INVESTIGATOR: Barletta, R. G.; Czuprynski, C. J.
PERFORMING INSTITUTION: Veterinary and Biomedical Sciences.  University of Nebraska.  Lincoln, Nebraska 68583
SUBJECT:  Molecular analysis of a Mycobacterium paratuberculosis colony-morphology attenuated mutant.
NON-TECHNICAL SUMMARY: Mycobacterium paratuberculosis is the etiologic agent of Johne's disease, a chronic infectious disease of ruminants, characterized by diarrhea, weight loss, and ultimately death.  The purpose of this study is to further characterize at the cellular, genetic and biochemical levels a colony-morphology mutant strain of the infectious agent shown to be attenuated by in virto assays.
OBJECTIVES: Objective 1. Determine the molecular basis of the colony morphology and attenuated phenotype of Mycobacterium paratuberculosis mutant strain 4H2.  The experimental design for this objective includes the use of both genetic and molecular-biochemical approaches: complementation analysis, gene expression studies and biochemical characterization.  Objective 2. Determine the intracellular fate of mutant 4H2 within bovine macrophages.  This objective will analyze the survival of the mutant strain 4H2 in stimulated and non-stimulated bovine macrophages, determine the localization of this M. paratuberculosis mutant strain within bovine macrophages and establish the in vitro susceptibility of the mutant strain to superoxides and nitric oxide.
APPROACH: In the first objective, PCR and Southern blotting analyses will be used to confirm the location of the transposition insertion within the suspected DNA sequence, located adjacent to a gene encoding one of the proline-rich proteins of M. paratuberculosis.  The wild-type allele of the candidate ppe gene will be introduced back into the mutant strain.  Bovine macrophage survival assays will be used to confirm the restoration of the virulent wild-type phenotype.  Wild type and mutant strains will be grown on both low and high iron media, as well as intracellularly within macrophages.  Gene expression under these conditions will be monitored at the transcriptional level by Northern and primer extension analyses, RT-PCR and transcriptional fusions to the firefly luciferase gene.  Further biochemical characterization will involve the over-expression and purification of the wild-type gene product from recombinant E. coli.  Using the purified product, monospecific polyclonal antibodies will be produced. In the second objective, a recombinant version of the mutant strain expressing the green-fluorescence protein will be used to assess their ability to survive and co-localize within lysosomes.  To determine survival, both unstimulated and interferon-gamma stimulated macrophages will be infected with the wild-type and mutant strains of M. paratuberculosis and monitored for both its ability to infect macrophages and persist intracellularly over time.  Confocal microscopy will be used for co-localization studies of bacteria-containing phagosomes with lysosomes.
PROGRESS: 2004/02 TO 2007/01 Mycobacterium avium subsp. paratuberculosis (MAP) is the etiological agent of a severe gastroenteritis in ruminants, known as Johne’s disease.  In the United States alone, economic losses for the dairy industry are estimated to be over $1.0 billion per year.  Survival within macrophages is a hallmark of MAP.  Identification of genes responsible for MAP survival in macrophages is important to understand how this bacterium causes disease.  This project is focused on the MAP mutant 4H2 that displays a colony morphology alteration and an attenuated phenotype in bovine macrophages.  In this reporting period, we compared the phagocytosis of MAP wild type by freshly isolated bovine monocytes and a bovine macrophage cell line.  Bovine monocytes exhibited a greater ability to phagocytose MAP (i.e. greater percentage of infected cells, and more bacilli per infected cell), than did a bovine macrophage cell line.  Phagocytosis of MAP by monocytes, but not the cell line, was significantly enhanced by the addition of autologous serum.  Following ingestion, the number of viable MAP cells in monocytes increased during the first 4 days and then declined between day 4 and day 8 after infection, as determined by a radiometric method.  The numbers of MAP remained largely unchanged in the cell line during the same incubation period.  The number of microscopically visible acid-fast bacilli increased with time in monocytes, but not in the macrophage cell line.  These observations suggest that replication and inhibition of bacilli may both occur in monocytes.  The difference in the ability of bovine monocytes and the macrophage cell line to ingest and restrain the intracellular growth of MAP provide valuable model systems for investigating various aspects of how MAP enters and persists within its preferred niche, the mononuclear phagocyte.  Similar experiments with mutant 4 H2 are in progress.  In addition, Southern blot and PCR analyses are consistent with the inactivation of MAP 1152.  However, transposon insertions may have polar effects and thus, we are carrying complementation tests with all wild type genes in the region immediately downstream to the transposon insertion site including genes MAP1152-1153-1155 and 1156.  Transformants will be verified and tested for survival in bovine macrophages.
IMPACT: 2004/02 TO 2007/01  Paratuberculosis and related mycobacterioses cause an estimated one billion dollars in annual losses to U.S. agriculture alone.  Molecular genetic studies of MAP mutants attenuated for survival in bovine macrophages may aid in the development of a live-attenuated vaccine to control Johne’s disease.
PUBLICATIONS: 2004/02 TO 2007/01
S.-R. Woo, J. Sotos, A.P. Hart, R.G. Barletta and C.J. Czuprynski. E-Pub. 2005. Phagocytosis and intracellular survival of Mycobacterium avium subsp. paratuberculosis in bovine monocytes and a macrophage cell line. Veterinary Immunology and Immunopathology. (ARD J. Series No. 14971)
PROJECT CONTACT:     
     Name: Barletta, R. G.  Phone: 402-472-8543  Fax: 402-472-9690
     Email: rbarletta@unl.edu

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 OCT 2005 TERM: 30 SEP 2010
INVESTIGATOR: Barletta, R. G.
PERFORMING INSTITUTION: Veterinary And Biomedical Sciences University of Nebraska Lincoln, Nebraska 68583
SUBJECT:  Molecular genetic analysis of Mycobacterium avium subsp. paratuberculosis (MAP) and related mycobacterial pathogens.
NON-TECHNICAL SUMMARY: MAP is the etiologic agent of Johne's disease, an infectious disease affecting all ruminants, characterized by diarrhea, weight loss, and ultimately death.  The purpose of this study is to use a genetic approach to study MAP virulence determinants and related pathogens. We expect to identify and characterize attenuated MAP mutants that could serve as candidate vaccine strains.
OBJECTIVES: The long term objective of this project is to understand, at the molecular level, the mechanisms of MAP pathogenesis and related mycobacterial pathogens, and to develop molecular tools to control and diagnose mycobacterioses in human and animal populations.  In this context, the following specific objectives are proposed: Objective 1: To identify and characterize genes involved in entry of MAP into bovine epithelial cells. Objective 2: To identify and characterize genes involved in replication and survival of MAP in bovine macrophages. Objective 3: Determine the intracellular trafficking of MAP mutant and wild-type strains within bovine macrophages. Objective 4: Characterize molecular targets of MAP and related pathogens for drug therapy.
APPROACH: Objective 1) We propose to screen a MAP signature tagged transposon bank that will be used to infect Madin-Darby bovine kidney (MDBK) cells in vitro to identify genes or virulence determinants in MAP encoding for proteins (or enzymes involved in the synthesis of lipids or carbohydrates) that participate in the process of binding and invasion of the intestinal mucosa.  Once a deficiency in invasion is established, the clones will be sequenced and searched against the MAP genome.  Methods will include screening MDBK epithelial cells for MAP invasion and complementation analysis to confirm that a phenotype observed is due to a specific gene inactivation.  Objective 2) DNA microarrays will be used to identify genes exclusively expressed within macrophages and defined targeted MAP mutants will be constructed and evaluated for replication and survival in bovine macrophages.  We will use whole MAP genome oligonucleotide DNA microarrays to profile the transcription level of each encoded gene.  Next, MAP isogenic mutants will be constructed to inactivate the gene of interest.  Finally, we will test the virulence of selected MAP mutants to survive and replicate in bovine macrophages.  Objective 3) We will use peripheral blood monocytes and the BoMac cell line to test whether MAP mutants have a diminished ability to prevent the fusion of phagosomal compartments.  This will include confocal microscope studies with recombinant GFP-expressing mutant strains ability to survive and co-localize within lysosomes.  In addition, we will test the ability of MAP mutant and wild-type strains ability to survive in stimulated and nonstimulated bovine macrophages.  Objective 4) We will focus on identifying and characterizing drug targets in the D-alanine branch of peptidoglycan biosynthesis to develop novel drugs for the therapy of M. tuberculosis and M. avium subsp. avium infections in humans, Johne's disease or bovine tuberculosis in animals, and Crohn’s's disease in humans.  We will need to determine the essentiality of a given target gene by constructing merodiploid strains using the putative wild-type gene in an integrating vector.  Next we will overproduce and purify the recombinant target proteins. D-alanine racemase activity will be assayed in the direction of the conversion of L-alanine into D-alanine by a modification of the coupled-spectrophotometric method while D-alanine:D-alanine ligase assays will be carried out by a modified thin layer chromatography based method.  Lastly, methods will be developed to screen a large number of chemical compounds for inhibitors of the purified enzymes.
PROJECT CONTACT:     
     Name: Barletta, R. G.  Phone: 402-472-8543  Fax: 402-472-9690
     Email: rbarletta1@unl.edu

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT PROJ STATUS: NEW
START: 01 SEP 2003 TERM: 31 AUG 2008
INVESTIGATOR: Karns J S; Van Kessel J S; Schukken Y H
PERFORMING INSTITUTION: Veterinary Preventive Medicine.  Cornell University. Ithaca, New York 14853
SUBJECT:  Pilot study of factors affecting maintenance of Mycobacterium, Salmonella, E. coli and Listeria on dairy farms.
OBJECTIVES: The objective of this research is to set up a Pilot Program consisting of two dairy herds to focus on the protocol development, laboratory set-up, program logistics, and database and bio-bank development needed to evaluate the impact of intervention strategies on Johne's disease dynamics, milk and beef quality (particularly with respect to zoonotic bacterial pathogens), economics and sustainability through intensive longitudinal follow up of selected research/demonstration dairy farms.  Long term goals are to validate intervention strategies to support BMP's and to optimize intervention and monitoring strategies given the constraints on time, labor and financial resources in modern dairy herds.  In addition, a national resource bank (data and biological specimens on well-characterized animals) will be created for current and future monitoring and research on dairy cattle diseases.  Emphasis will be on longitudinal data collection on endemic infectious diseases of public health and animal health concern in dairy herds.  APPROACH: Pathogens are of increasing concern on dairy farms and in dairy products.  The production of safe and wholesome food from US farms requires control of the production process on the farm.  Specific focus areas in this process are biosecurity, food safety and animal health.  To be able to scientifically support regional process control programs there is a need for longitudinal research on commercial dairy farms throughout the United States.  In this collaboration, Cornell University, The Pennsylvania State University, University of Vermont and the University of Pennsylvania, all participants in the Regional Dairy Quality Management Alliance (RDQMA), and the USDA's Environmental Microbial Safety Laboratory (EMSL) will investigate the sites on operating dairy farms that act as reservoirs for pathogenic microorganisms that affect animal health and that decrease product quality because of their zoonotic nature.  Several farms will be identified as candidates for this investigation and 3 will be chosen for extensive sampling based on the previous occurrence of Johne's disease and/or Salmonella infection.  Serum, feces, bulk tank milk, and environmental samples (water, bird and rodent feces, feed, etc.) will be taken on each farm.  In addition, tissue samples will be obtained from carcasses of culled animals.  Samples will be distributed among the university and ARS researchers for analysis to determine the presence of Mycobacterium avium paratuberculosis (the causative agent of Johne's disease in cattle) and for Salmonella enterica, Escherichia coli O157:H7, and Listeria monocytogenes (human food-borne pathogens of concern in dairy products).  This research will be the first to attempt a comprehensive analysis of both Johne's disease and food-borne pathogens on working dairy farms.  It will allow us to determine a baseline for these organisms on two farms and set the stage for investigation of the effect of interventions, in the form of best management practices (BMPs), on animal health and product quality.
PROGRESS: 2003/10 TO 2004/094.  What were the most significant accomplishments this past year? 4D.  This report serves to document research conducted under a Specific Cooperative Agreement between ARS and Cornell University.  Additional details of research can be also be found in the report for the parent CRIS: 1265-32000-074-00D titled: Dairy Management Practices and the Transmission of Zoonotic Pathogens in Milk.  This cooperative agreement is part of a larger project involving three Universities, the University of Pennsylvania, Penn State University and Cornell University, formulated under the advise and consultation with the Notheastern Regional Dairy Quality Alliance (RDQMA) and the National Milk Producers federation.  The core of the project involves the identification of dairy farms in New York and Pennsylvania that are suitable for a long-term longitudinal study of on-farm ecology and epidemiology of human or cattle pathogens.  These farms have been identified but will remain anonymous and sample collection protocols have been developed and successfully carried out.  The purpose of the project from the perspective of our lab (EMSL) is to characterize the microbial populations on the farm with particular interest in Salmonella and Listeria strains occurring in the farm environment.  When this characterization for each farm is completed, dairy management practices will be implemented to determine the effect of the change in practices on the microbial ecology and distribution.  Initial findings from 4 different samplings of the two farms have shown that potentially pathogenic forms of Listeria monocytogenes and strains of Salmonella are recoverable from animals and a variety of environmental samples.  Since this is the initial year of the project, no data has yet been gathered with respect to management practice influence.
PUBLICATIONS: 2003/10 TO 2004/09
No publications reported this period.

 

PROJ TYPE: HATCH PROJ STATUS: TERMINATED
START: 01 OCT 2002 TERM: 30 SEP 2005 FY: 2005
INVESTIGATOR: Thonney, M. L.; Smith, M. C.; Stehman, S. M.
PERFORMING INSTITUTION: Animal Science.  Cornell University.  Ithaca, New York 14853
SUBJECT: Effect of vaccination against paratuberculosis (Johne's disease) in sheep.
NON-TECHNICAL SUMMARY: Paratuberculosis (Johne's Disease) causes early death and poor reproductive performance in sheep and dairy flocks.  This project tests the efficacy of vaccination to help control paratuberculosis in sheep.
OBJECTIVES: The overall objective of this proposal is to evaluate the effectiveness of vaccination against Johne's Disease in sheep.  Correlated objectives are to improve the control of Johne's disease in sheep flocks to increase production efficiency and to eradicate the disease from the Cornell Dorset flock, which is one of the only flocks in the world intensely selected for out of season breeding.  A successful vaccination program would make the Cornell aseasonal genotype available to New York farmers which would enable them to meet the year-round demand from ethnic consumers for lamb in the Northeast.
APPROACH: One-hundred control ewes and 100 ewes vaccinated as lambs with Mycopar are in an experiment started in 1999.  The presence and size of granulomas was monitored in the vaccinated lambs.  The ewes in the vaccination trial are managed with the other ewes in our flock.  At 2, 3, 4, and 5 years of age, about one-fourth of the control ewes and one-fourth of the vaccinated ewes are being slaughtered so that the intestinal tracts can be examined by histopathology to determine if they are infected.  The reason for the serial slaughter is to determine if there is a difference between the control and vaccinated groups in severity of pathology with age if some ewes in the vaccinated group become infected.  The ewes are randomly sampled as they finish a lambing/lactation period.  Prior to slaughter, samples of blood and feces are obtained for development of fecal culture methodology and correlation of AGID results with histopathology data.  At slaughter, the intestinal tracts are retrieved and returned on ice to the College of Veterinary Medicine where sample tissues from the ileocecal junction, the ileocecal node and the mesenteric node are collected and stored in formalin.  Those tissues are then processed and stained for histological examination by a veterinary pathologist.  The histopathological results are the gold standard by which the effectiveness of vaccination will be judged and to which results from AGID and fecal culture will be compared. Statistical analysis will test the null hypothesis that there is no difference between vaccination groups in the incidence of paratuberculosis.  Incidence of paratuberculosis will be analyzed in a 2 (ewe vaccination) 4 (year) contingency table using 2.
PROGRESS: 2002/10 TO 2005/09  Finnsheep x Dorset ewes managed under the Cornell STAR accelerated lambing system were used to test vaccination as a method to help control Johne's Disease (Mycobacterium avium subsp. paratuberculosis) in sheep.  A total of 135 ewe lambs vaccinated against Johne's Disease using Mycopar(R) (a licensed cattle vaccine used with permission) and 125 contemporaneous control ewe lambs started the project across four birth groups (March 1999, June 1999, January 2000, March 2000).  Fifty control and 60 vaccinated ewes died of natural causes, 73 control and 72 vaccinated ewes were culled, with 66 control and 64 vaccinated ewes old enough at culling for sampling for histopathology, and 2 control and 3 vaccinated ewes were missing (lost eartags) by the end of the experiment in August 2005.  Granuloma areas in the vaccinated ewes ranged from 0 to 7 cm2 and appeared to reach maximum size by 10 to 15 days post-vaccination.  An overall 18 percent death loss to two years of age was higher than expected.  More (P = 0.073) vaccinated than control ewes died at young ages.  Within birth groups, however, the effect was significant only for the ewes born in the January 2000 lambing season.  There was no significant difference in natural death rates by the end of the experiment.  Of those ewes that lived long enough that they could have lambed, 6 of 113 (5.3 percent) control ewes and 12 of 107 (11.2 percent) vaccinated ewes had no records of lambing.  These 18 ewes were kept in the flock to ensure that sufficient animals were available to sample at older ages.  Of the ewes that were available for lambing, 51.8 percent had lambed by the end of the first 73-day period and 77.7 percent had lambed by the end of the second 73-day period, but the cumulative 146-day-total represented 70.1 percent of vaccinated ewes compared to 85.0 percent of control ewes (P = 0.008).  Although there was no difference between vaccination groups in lambs delivered, born alive, or weaned per lambing, control ewes lambed more frequently (P = 0.049).  Among ewes with available histological samples from the ileum, cecum, and mesenteric lymph node, 13 of 92 control ewes and 3 of 86 vaccinated ewes had one or more pathological lesions consistent with Johne's Disease.  Thus, only 14.1 percent of control animals that died or were culled purposefully for sampling had evidence of infection by histopathology.  Even with this moderate control-animal infection rate, vaccination reduced (P = 0.013) infection.  Among animals that were purposely culled for sampling, the infection rates were 15.1 and 3.1 percent for control and vaccinated animals (P = 0.018), respectively.  Thus, vaccination against Johne's Disease using Mycopar(R) will reduce the incidence of infection and help to control the disease in sheep flocks.
IMPACT: 2002/10 TO 2005/09  Vaccination against Johne's Disease (Mycobacterium avium subsp. paratuberculosis) using Mycopar(R) will reduce the incidence of infection and help to control the disease in sheep flocks.  This will reduce mortality in breeding flocks, improving efficiency of production to make sheep farming more profitable and encourage the expansion of environmentally-sustainable sheep farms.
PUBLICATIONS: 2002/10 TO 2005/09
No publications reported this period
PROJECT CONTACT:     
     Name: Decker, D. J.  Phone: 607-255-2224.  Fax: 607-255-9499
     Email: cuaes@cornell.edu

 

PROJ TYPE: HATCH PROJ STATUS: NEW
START: 01 OCT 2003 TERM: 30 SEP 2006 FY: 2005
INVESTIGATOR: Gavalchin, J.; Thonney, M. L.; Stehman, S. M.; Smith, M. C.
PERFORMING INSTITUTION: Animal Science.  Cornell University.  Ithaca, New York 14853
SUBJECT:  Identification of protective immune responses in sheep after vaccination with the mycopar vaccine for paratuberculosis.
NON-TECHNICAL SUMMARY: Johne's Disease is widely distributed in cattle, sheep and goats.  The pathogenesis of Johne's is not understood, and its diagnosis is difficult in live animals.  No vaccine for Johne's is approved for use in sheep in the US.  This study will identify the immune responses of sheep after infection with MAP, and after vaccination with the cattle vaccine, Mycopar.  Our goal is to understand the pathogenesis of Johne's, and find immune biomarkers that can be used for its diagnosis.
OBJECTIVES: Johne's Disease, caused by Mycobacterium avium paratuberculosis (MAP), is widely distributed in cattle, sheep and goats.  In the US, estimates of 20 to 40 percent of dairy herds are infected with MAP, leading to losses of over $220 million/year.  Many of the sheep flocks in NY are infected, with weight loss, poor production, increased parasitism, and faster turnover rate.  This has limited sales, which is a particular problem for the Cornell Dorset breeding flock, since it is one of the only flocks in the world selected for out of season breeding.  Because the only time that Johne's disease can be conclusively diagnosed is during its late stages, when many organisms are shed in the feces, or when organisms can be identified in tissues of infected animals upon necropsy, it is hard to determine the exact number of infected flocks in the United States.  This situation would improve if we were able to define the immunological events in natural infection with MAP, so that infected animals could be culled before the onset of clinical disease.  Vaccination against MAP also may be effective; however it only modulates clinical signs of disease and does not prevent an animal from becoming a carrier of MAP.  Further, the mechanisms of protection afforded by vaccination are not well understood.  Ultimately, a successful vaccination program will help to eradicate the disease in all sheep flocks and increase the availability of aseasonal Cornell sheep to NY farmers.  In addition, the transfer of results to cattle could also have a significant economic impact on the New York dairy cattle industry.  Using sheep that are part of an ongoing trial to test the effectiveness of the cattle vaccine, Mycopar on MAP infection, we propose to investigate whether modulation of immune responses of sheep after infection with MAP, or after vaccination with Mycopar, will lead to immune responses that are effective in limiting or preventing Johne's, according to the following objectives.  Objective 1: We assume that all of the animals in the Cornell University Mycopar vaccine trial have been exposed to M. paratuberculosis, but only some will be infected.  Since the onset of disease may take anywhere from 2 weeks to years, we will first define the stages of disease in the flock by assaying sera for levels of interferon gamma, which is a biomarker for early disease, and MAP-specific antibodies, which are characteristic of late disease.  Cell-mediated responses will be measured by skin testing with the Johnin antigen.  The results of these tests, as well as fecal culture and PCR detection of organism in feces, will be used to characterize each animal with regard to MAP infection/exposure.  Objective 2: We will define the immune cell phenotypes and functions that are modulated in MAP infection and Mycopar vaccination by in vitro methods.  These studies will also identify additional biomarkers for immune responses to MAP.
APPROACH: There are 184 sheep remaining in the original Mycopar vaccination trial; 88 were vaccinated with Mycopar at weaning either in July 1999, September 1999, May 2000, and July 2000, and there are 96 age-matched unvaccinated controls.  In each of the 3 years of this grant, the immune responses to MAP will be determined, in order to correlate specific immune responses with disease kinetics and clinical stages. Objective 1:  We will first define the stages of infection in the flock by assaying sera for levels of interferon gamma, which is a biomarker for early disease, and MAP-specific antibodies which appear in late disease.  Skin testing with Johnin will also be done.  The results of these tests, and fecal organism load, will be used to characterize each animal with regard to MAP exposure/infection.  Approach: Ten mls of blood will be collected from each ewe.  Serum will be obtained by centrifugation.  Fecal samples will be collected for determination of organism load by PCR. DTH to Johnin and TB will be conducted by an accredited veterinarian (Mary Smith, DVM).  Gamma interferon levels will be determined by the Bovigam assay.  The Cornell Veterinary Diagnostic Lab will perform the AGID assay for antibodies to Johnin.  Johnin-specific antibodies will also be quantitated using the Parachek test (Biocor).  DNA will be isolated from feces using the QIAamp DNA Stool Mini Kit.  Enzymatic amplification of MAP DNA will be performed using PCR primers MP3 (5'-CTGGCTACCAAACTCCCGA-3') and MP4 (5'-GAACTCAGCGCCCAGGAT-3').  The results of the individual assays will be analyzed by Student's T-test.  The data analysis program SPSS will be used to perform logistic regressions, correlations, cluster centers, and cross tabulations to identify correlated immune responses and stages of infection.  Objective 2: We will further define the immune cell phenotypes and functions that are modulated in MAP infection and Mycopar vaccination by in vitro methods.  The results of these studies will identify additional biomarkers for immune responses to MAP.  Approach: Peripheral blood mononuclear cells (PBMC) will be isolated and analyzed by flow cytometry for the proportion of T lymphocytes (CD4, CD8), B lymphocytes (anti-ovine IgG), monocytes (CD14), and neutrophils, as well as expression of activation markers.  Cells will be cultured in vitro with Con A to determine the overall proliferative responses, and with Johnin, to determine the MAP-specific responses.  Immunoglobulin production will be measured by ELISA. Johnin-specific cytokine production will be evaluated by culture of PBMC with either Con A or Johnin, and will include interleukin (IL)-2 and interferon- gamma to measure the Th-1-type response and IL-4 and IL-10 to measure to the Th2-type response.  IL-1 and TNF alpha levels will also be measured.  Data will be analyzed by Student's T-test.
PROGRESS: 2005/01 TO 2005/12  We are continuing our studies related to defining the immunological events in response to natural infection with MAP, as well as Mycopar vaccine. Data from the second set of sheep were analyzed in the past year of funding.  We found that there was about a nine-fold increase (p less than 0.001) in concentrations of MAP-specific Ab for vaccinated compared with control ewes indicating that vaccination mounted a humoral immune response, while vaccination status had no effect on IFN-g suggesting that if there had been a cell-mediated response to vaccination accompanied by IFN-a production, this indication of a cell-mediated response had subsided three years post-vaccination.  The AGID assay, which is currently used for pre-clinical Johne's disease identification, was positive only for one ewe that happened to be in the control group and had neither high IFN-g (0.24 OD unit) nor high MAP-specific Ab (0.21 OD unit) values.  Thus, vaccination apparently did not interfere with this assay.  Because many of the control ewes were expected to be infected, these data support the contention that infected ewes not showing signs of clinical symptoms likely will not be detected by AGID, thus this test is specific but not very sensitive.  Furthermore, AGID apparently does not detect the MAP-specific Ab measured in this experiment.  The scatter plot of g-IFN against MAP-specific Ab provided an indication of the variation in these OD values among the ewes.  None of the control ewes had MAP-specific Ab values higher than the lowest values for vaccinated ewes and only three of the vaccinated ewes had MAP-specific Ab values sufficiently low that they approached the highest values for control ewes.  Thus, it is obvious that this MAP-specific Ab can identify ewes that have been vaccinated with Mycopar.  Three of the control ewes had g-IFN values above 0.4 OD units that appeared to be outliers.  These and four vaccinated ewes that had low MAP-specific values but relatively high g-IFN values in the 0.3 to 0.4 range will be studied for additional immune responses to determine if they are infected.  Our previous data also supported skin testing to the Johnin Ag as a predictive measure of reactivity since all of the vaccinated animals had larger reactions than the non-vaccinated animals.  The significance of our results to date will be determined when the organism load of each ewe is known and is correlated with our assay results, which is currently underway.  During 2006, we will validate and expand upon our findings by correlating the in vitro and in vivo responses of sheep that are infected by MAP as determined by AGID, that were not part of the vaccination study, to Johnen.  Infected animals include 4 aged 21 months, 4 aged 3 years, 10 aged 4 years, 5 aged 7 years and 5 aged 10 years, and age-matched uninfected controls are available for each group.  Hopefully, we will be able to use the results of this study to establish a set of biomarkers that correlate with the stage of infection.
IMPACT: 2005/01 TO 2005/12  Johne's Disease, caused by Mycobacterium avium paratuberculosis (MAP), is widely distributed in cattle, sheep and goats. In the US, estimates of 20 to 40 percent of dairy herds are infected with MAP, leading to losses of over $220 million/year.  Many of the sheep flocks in NY are infected, with weight loss, poor production, increased parasitism, and faster turnover rate.  The pathogenesis of Johne's is not understood, and its diagnosis is difficult in live animals.  No vaccine for Johne's is approved for use in sheep in the US.  This study, to identify the immune responses of sheep after infection with MAP, and after vaccination with the cattle vaccine, Mycopar, will provide an understanding of the pathogenesis of Johne's, and identify immune biomarkers that can be used for its diagnosis.
PUBLICATIONS: 2005/01 TO 2005/12 
No publications reported this period
PROJECT CONTACT:     
     Name: Decker, D. J.  Phone: 607-255-2224.  Fax: 607-255-9499
     Email: cuaes@cornell.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 99-35201-8039 PROPOSAL NO: 1999-02859
START: 01 OCT 1999 TERM: 30 SEP 2002 FY: 2002 GRANT YR: 1999 GRANT AMT: $87,784
INVESTIGATOR: Sasahara, K. C.
PERFORMING INSTITUTION:  Food science.  Cornell University.  Ithaca, New York 14853
SUBJECT:  Novel strategies for determining thermal destruction of Mycobacterium tuberculosis.
NON-TECHNICAL SUMMARY: Heat treatment procedures that reliably destroy M. paratuberculosis have not been established.  The purpose of this study is to test the effectiveness of light production by engineered M. paratuberculosis as a rapid and sensitive method for viable M. paratuberculosis.
OBJECTIVES: The objective of this project is to apply a novel approach using luciferase reporter constructs to determine whether M. paratuberculosis has the potential to survive different processing conditions including high temperature short time (HTST) pasteurization and batch pasteurization. APPROACH: Three specific aims to achieve my objective are: i) to use phage- and plasmid-encoded luciferase reporter genes to direct luciferase expression in different M. paratuberculosis isolates, ii) to use selected luciferase constructs to determine survival of M. paratuberculosis during pasteurization and other milk heat treatments,and iii) to evaluate the luciferase reporter phage system as a rapid detection and monitoring tool for the presence of M. paratuberculosis in processed dairy products.  Using this approach, viable M. paratuberculosis will produce luciferase and thus luminesce so that they can be detected.  I believe this approach will obtain data that will improve our understanding of the biology of M. paratuberculosis and lead to better control and dairy herd health management.
PROGRESS: 1999/10 TO 2002/09  Mycobacterium avium subsp. paratuberculosis (MAP) is the causative agent of Johne's disease in dairy cows.  This organism, which is excreted in feces and milk, is not easily inactivated by thermal treatments.  Our current understanding of MAP inactivation kinetics during heat treatment processes is limited largely due to a lack of rapid and sensitive methods for detection of viable cells.  To provide tools for measuring MAP survival, we created multiple MAP strains harboring pYUB180, which is a plasmid bearing a constitutively expressed firefly luciferase gene, FFlux, under the control of a mycobacterial heat shock protein promoter.  Luminescence is constitutively produced in viable cells and serves as a presence or absence indicator of MAP viability.  MAP transformants were screened for their ability to stably express luciferase over multiple generations.  Of the numerous transformants obtained, two produced high levels of luminescence, and therefore, were suitable for further use in thermal resistance experiments.  These two strains were inoculated into media that was either heated statically in glass capillary tubes or non-statically in a pasteurizer with a turbulent flow holding tube.  Static test conditions in capillary tubes were performed at one temperature (72 C) with varying heating times of between 15 and 120 seconds in three test solutions: milk, Middlebrook 7H9 broth, or colostrum.  Heated cultures were enriched in Middlebrook 7H9 broth with mycobactin J for 1, 2, or 4 weeks at 37 C, and plated onto Herrold's Egg Yolk (HEY) slants.  Both strains grew on HEY slants from all heat treatments.  Luminescence did not always correlate to observed growth on HEY slants.  In other instances, there was no detectable luminescence despite colony appearance on HEY slants.  Neither strain grew on HEY slants after passage through a 72 or 75 C turbulent flow holding tube, however, the corresponding cultures produced various levels of luminescence suggesting the presence of viable MAP cells in the heat-treated samples.  Both strains that had been heated to 65 C formed colonies on HEY slants and produced various levels of luminescence.  Positive control non-heat treated inoculated milk showed both various levels of growth on HEY slants and luminescence.  Although 72 and 75 C thermal treatments did not yield viable cells on HEY slants, sporadic luciferase activity in the treated samples suggests the presence of low levels of viable cells in the milk samples.  Mycobacterial luciferase reporter phages (phGS18, phAE40, and phAE85) were tested for the ability to infect MAP isolates and to be used as a rapid method for detection of the presence of viable MAP in dairy products.  To varying degrees, all three phages infected and produced luminescence in 18 MAP isolates growing in Middlebrook 7H9 broth within 24-96 hours at 37 C.  Attempts to test the ability of these phages to detect viable MAP in milk samples were unsuccessful.
IMPACT: 1999/10 TO 2002/09  Despite development of effective tools for detection of low levels of viable M. avium subsp. paratuberculosis in various media, we do not have definitive evidence of the destruction of this organism by current pasteurization strategies.  Luminescence is effective as a rapid detection method for the presence of this organism, but many intrinsic mycobacterial characteristics hinder the definitive determination of whether MAP survives pasteurization. PUBLICATIONS: 1999/10 TO 2002/09
Kyle C. Sasahara, Sang J. Shin, and Kathryn J. Boor. 2003. Detection of viable Mycobacterium avium subsp. paratuberculosis using luciferase reporter systems. In preparation.
PROJECT CONTACT:     
     Name: Coffman, W. R.  Phone: 607-255-2224.  Fax: 607-255-9499
     

 

PROJ TYPE: HATCH PROJ STATUS: TERMINATED
START: 01 OCT 2000 TERM: 30 SEP 2003 FY: 2004
INVESTIGATOR: Wiedmann, M.; Scarlett, J.; Worobo, R.
PERFORMING INSTITUTION:  Food Science.  Cornell University.  Ithaca, New York 14853
SUBJECT:  Improved tools for predicting the pathogenic potential of foodborne microorganisms.
NON-TECHNICAL SUMMARY: Foodborne diseases cause an estimated 76 million illnesses and 5000 deaths annually in the US.  To protect consumers from these diseases it is important to understand exactly which bacteria can cause human disease.  This project examines bacteria from humans and animals with bacterial diseases and from contaminated foods by DNA fingerprinting methods to define which bacterial types cause human foodborne disease.
OBJECTIVES: We propose a multidisciplinary approach for developing science-based microbial food safety criteria.  Current regulations for foodborne pathogens are commonly based on historical taxonomic identifications that may not correlate to the ability of an organism to cause human disease.  This project will identify distinct genetic criteria that define the specific human pathogenic potentials of clonal bacterial groups focusing on E. coli O157:H7, Streptococcus agalactiae, and Mycobacterium paratuberculosis.  Objective 1: Assemble a collection of animal, human, and environmental (where applicable) bacterial isolates to be characterized by molecular subtyping methods.  Objective 2: Epidemiologically define the relative human pathogenic potentials of different clonal groups of these pathogens.  Objective 3: Explore the functional and genetic basis of differences in the abilities of clonal subgroups to cause human disease using tissue culture and animal models.
APPROACH: Objective 1: Human, food, and animal isolates of E. coli O157:H7, St. agalactiae, and M. paratuberculosis will be collected in collaboration with the NYS Veterinary Diagnostic Laboratory, the Dept. of Argriculture and Markets, and the Dept. of Health.  All isolates will be characterized by DNA subtyping methods including Southern blotting, ribotyping and sequencing of selected virulence genes.  Objective 2: Bacterial subtype distribution among human, food, and animal isolates will be statistically analyzed to identify specific subgroups linked to human infections.  Objective 3: Selected subgroups differing in human and animal host specificities will be used to infect appropriate tissue culture cell lines to determine differences in their pathogenic potentials.
PROGRESS: 2000/10 TO 2003/09  Most food safety regulations regarding bacterial foodborne pathogens specify action limits for the presence of specific bacterial species.  These classical taxonomic definitions of bacterial species often do not correlate to the ability of a group of bacteria to cause human disease.  Rather, somewhat related bacteria that may differ in their abilities to cause human and/or animal disease may be grouped together into the same species.  This project is designed to develop a phylogenetic and population genetics framework to allow the specific definition of bacterial clonal groups with human pathogenic potential.  Our work specifically focused on Streptococcus agalactiae, which is not only a major cause of mastitis in cattle, but is also responsible for severe invasive disease in adult and neonate humans, as well as asymptomatic infections in women.  To probe the population genetics and the interspecies transmission potential of this species, we used molecular subtyping and phenotypic methods to characterize temporally matched bovine milk and clinical human invasive isolates (52 each) collected in New York state over 18 months.  EcoRI ribotyping differentiated 17 ribotypes and DNA sequencing of the housekeeping gene sodA and of a 950 bp fragment of hylB, encoding hyaluronidase, differentiated 17 and 7 allelic types, respectively.  Human and bovine isolates were not randomly distributed between ribotypes and hylB and sodA allelic types.  Combined analysis of all subtyping methods allowed differentiation of 39 clonal groups, 26 groups contained only bovine isolates.  Only two clonal groups contained both human and bovine isolates.  EcoRI ribotyping also showed a significantly higher genetic diversity among bovine isolates (SID = 0.90 +/- 0.05) as compared to human isolates (0.42 +/- 0.15), providing further evidence that human and bovine isolates represent distinct populations.  Eight human but no bovine isolates showed an IS1548 transposon insertion in hylB.  Hyaluronidase activities determined for 43 representative isolates showed that human isolates on average showed lower activities than bovine isolates.  Isolates with the IS1548 insertion in hylB showed no hyaluronidase activity.  In addition, tissue culture invasion assays showed that human and bovine isolated did not differ in their ability to invade human epithelial cells.  Our data show that (i) EcoRI ribotyping and hylB and sodA sequencing provide discriminatory subtype analysis of S. agalactiae, (ii) human invasive and bovine S. agalactiae represent distinct populations with limited interspecies transmission, and (iii) hyaluronidase activity is not required for all human infections. IMPACT: 2000/10 TO 2003/09  Most current food safety and public health regulations use classical taxonomic species definitions to identify microorganisms that represent a public health hazard. Bacteria within a given species may vary tremendously in their ability to cause human disease though.  This work clearly shows that bacteria within a given species, even if associated with animal and human disease, are not necessarily transmitted between these hosts.  A better understanding of bacterial host specificity for zoonotic and foodborne pathogens will contribute to the development of science-based regulations and intervention strategies targeting those bacterial subtypes that have the potential to cause human disease.
PUBLICATIONS: 2000/10 TO 2003/09
No publications reported this period
PROJECT CONTACT:     
     Name: Coffman, W. R.  Phone: 607-255-2224.  Fax: 607-255-9499
     Email: ded7@cornell.edu

 

PROJ TYPE: HATCH PROJ STATUS: NEW
START: 01 OCT 2004 TERM: 30 SEP 2007 FY: 2005
INVESTIGATOR: Chang, Y. F.; Baeummer, A. J.; Shin, S. J.; Stehman, S.; Nydam, D. V. PERFORMING INSTITUTION: Vet Population Medicine & Diagnostic Science.  Cornell University.  Ithaca, New York 14853
SUBJECT:  Biosensor for rapid detection of Mycobacterium avium subsp. paratuberculosis.
NON-TECHNICAL SUMMARY: Paratuberculosis (Johne's disease) occurs worldwide as a chronic granulomatous enteritis of domestic and wild animals.  A sensitive and rapid test is urgently needed.  The purpose of this study is: 1) improve the sensitivity of the PCR test directly from fecal samples, milk, and colostrum or liquid media culture system by using a novel laser-induced cell lysis technique to prepare the DNA extracts and (2) develop a rapid, inexpensive, and sensitive biosensor for detection of MAP based on RNA detection.
OBJECTIVES: Molecular techniques for the diagnosis of Johne's disease based on nucleic acid amplification (regular PCR and/or real-time PCR) have been widely used in animal health diagnostic laboratories.  However, the sensitivity of the PCR-based test directly from fecal samples, especially from the low shedders, is still very low.  Furthermore, PCR detection in milk and colostrum cannot distinguish between viable and non-viable organisms.  Thus, in order to have sufficient material, very long cell culture incubation times are required until a definite answer can be found using PCR.  Therefore, we propose to improve the PCR based test by using a novel cell lysis technique, the laser-lysis technology, to improve the yield of DNA extract preparation.  The immensely thick lipid layer of MAP is the main obstacle for current lysis methods.  Since the laser-lysis technique is based on the local and specific increase of intracellular water molecules, we postulate that it will not be hindered by the presence of the thick lipid layer but will successfully lyse cells without any damage to DNA, RNA and intracellular protein molecules.  Our central hypothesis is that the use of the laser lysis technique will increase the template DNA recovery, and therefore, it will increase the sensitivity of PCR test directly from fecal samples, which results in a significantly shorter cell incubation time as required currently.  At the same time, biosensor technology will enable us to simplify the detection system and make it inexpensive and even more rapid while keeping its high specificity for the detection of Johne's disease.
APPROACH: 1. The use of laser lysis technique will increase the DNA template recovery from fecal sample preparation; thus, it will increase the sensitivity of PCR tests from either fecal sample directly and/or from Trek culture system.  If this technique is successful, then, it may be applied to fecal samples directly and/or early detection of Trek liquid culture system.  2. The RNA biosensor based on liposome technology is a rapid, inexpensive and sensitive system to detect the MAP directly from fecal samples and/or Trek culture system.  The antibody biosensor is also a rapid, inexpensive and sensitive system to detect the Mycobacterium avium subsp. paratuberculosis (MAP) directly from fecal samples and/or Trek culture system.  To accomplish the objective of this study, we will apply two approaches: (1) Increase the PCR sensitivity by the improvement of cell lysis and thus DNA extraction using laser-induced cell lysis.  (2) Apply RNA Biosensor for MAP diagnosis. PROGRESS: 2005/01 TO 2005/12  NASBA analysis: Nucleic acid sequence based amplification (NASBA) reactions were carried out for ISMav2 and IS900 genes of MAP.  Five microliters of amplified NASBA products were analysed by electrophoresis on 2 percent agarose gels, containing 0.5 ug/ml of ethidium bromide.  Gels were run at 100 V for 30 min in TAE buffer. NASBA products were visualized using a UV illuminator and photographed using photodocumentation system. Biosensor assay:  Probes ands primers were derived from both ISMav2 and IS900.  The biosensor assay was carried out by mixing 5 ul of Master mix (containing 20 percent Formamide, 4X SSC, 0.2M sucrose and 0.2 percent Ficoll type 400), 1 ul of reporter probe (2pmol/ ul), 1 ul of capture probe (1pmol/ul) and 1 ul of amplified target RNA in a glass tube.  Initially, the samples were incubated at 65C for 5 min to open up the secondary structures of RNA and 2 ul of liposomes tagged with reporter probe were added and incubated at 41C for 20 min.  After the membrane had absorbed all of the solution by capillary action, 35ul of running buffer (40 percent Formamide, 8X SSC, 0.2M sucrose and 0.2 percent Ficoll type 400) was added to the bottom of the test tube to flush the solution up the membrane.  After 10 min, when the running buffer had run the length of the strip, the signal at the capture zone was analyzed with a reflectometer.  Biosensor assay for ISMav2 with NASBA product:  The probes (capture and reporter probe) and the target along with the master mix were incubated at 65C for 5 min to open up the secondary structures of amplified target RNA.  No signals were noticed at the capture zone.  Subsequently the probes and the target were denatured at 94C for 5 min and hybridization was carried out at 41C for 20 min.  Weak signals were detected at the capture zone when the target was denatured at 94C.  Biosensor assay with PCR product of ISMav2: PCR was performed for ISMav2 using DNA as target using the following primers, FP 5' CCCTGACCGGCATCGATGAT3' And RP 5' CTTGCCGTTATCGGTCAAGA3'.  The PCR product was used as target for the biosensor assay.  The target (2 ul) and the probes (Capture and Reporter probes) along with the master mix were denatured at 100C and hybridization was carried out at 50C, after adding 1 ul of Liposomes tagged with reporter probes.  Good signals were noticed at the capture zone and the signals were analyzed with the reflectometer.  Biosensor assay for IS900:  Since there were only weak signals for IS900, internal probes were also designed and used.  Signals could not be improved even with internal probes, which were at 5pmol and 10pmol concentrations.  The reason for the weak signal at the capture zone could be due to the secondary structures formed by the target amplified RNA (NASBA product), which has more than 60 percent GC content.  Further improvement with different primer sets is ongoing.  Biosensor assay with the RT-PCR product of ISMav2 was performed and it gave weak signals.  Attempts are being made to optimize the assay to get better signals and also to try with the RT-PCR product of IS900.
IMPACT: 2005/01 TO 2005/12  Due to the insidious nature of Johne's disease and the lack of a cost effective treatment, control of this disease depends on accurate diagnosis and aggressive management to lessen the serious economic impact this disease may have in an infected herd or flock.  Therefore, improvement of Johne's disease diagnosis is very important to curtail the economic loss caused by this bacterium.  Attempts to develop a better diagnosis for this disease using a novel biosensor technique.  Biosensors are portable devices that can, with high sensitivity and specificity, rapidly analyze a sample for the presence of a specific analyte and quantify the amount present.  Biosensors are typically easy to use, inexpensive and reliable for field-testing.  Once we develop the test, it will be used to help the quick diagnosis of this disease.  This will improve the economic growth in the cattle industry and reduce the environmental contamination of the bacterium.  Since this bacterium has been suspected to be the cause of human Crohn’s's disease (a gastroenteritis of human), the culling of infected animals will reduce the chance of milk, cheese contamination of this organism.  This will have a great social impact on the quality of life.  In conclusion, we are confident that we will develop a new technique to help the curtail the economic loss of this disease.
PUBLICATIONS: 2005/01 TO 2005/12
No publications reported this period.
PROJECT CONTACT:     
     Name: Decker, D. J.  Phone: 607-255-2224  Fax: 607-255-9499
     Email: cuaes@cornell.edu

 

PROJ TYPE: STATE PROJ STATUS: EXTENDED
START: 01 OCT 1988 TERM: 30 SEP 1998 FY: 2005
INVESTIGATOR: Lein, D. H.; Shin, S. J.; Jacobson, R. H.
PERFORMING INSTITUTION: Diagnostic Laboratory.  Cornell University.  Ithaca, New York 14853 Development of improved diagnostics for paratuberculosis objectives: develop improved diagnostics for Paratuberculosis via culturing techniques and serodiagnosis using specific antigens in automated kinetics ELISA (KELA) systems.
APPROACH: Improve selective media for Mycobacterium paratuberculosis to reduce contamination by various environmental bacteria and fungi.  In methodology various gemination procedure for spores will be explored as well as various antibiotic combinations.  Specific antigens are being employed in KELA serodiagnostic assays for more accurate and timely detection of cattle infected with paratuberculosis.  Epidemiological surveys will be conducted using a validated test.

 

PROJ TYPE: SPECIAL GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2006-34475-17127 PROPOSAL NO: 2006-06092 START: 01 AUG 2006 TERM: 31 JUL 2008 GRANT YR: 2006 GRANT AMT: $1,317,014 INVESTIGATOR: Freeman, D.; Logue, C.; Sellnow, T.; Hinsz, V.; Nganje, W.; Khaitsa, M.; Gibbs, P.; Panigrahi, S.; Hall, C.; Glower, J.
PERFORMING INSTITUTION: Veterinary & Microbiological Sciences.  North Dakota State Univ.  Fargo, North Dakota 58105
SUBJECT:  Food safety risk assessment, ND.
NON-TECHNICAL SUMMARY:  Annually, millions of people in the US suffer from foodborne illness, resulting in thousands of deaths.  The purpose of these projects are to develop and test models designed to predict risk of pathogen contamination, and to develop improved quality sensors, with the ultimate goal of enhancing food safety.
OBJECTIVES: A. Risk Assessment Objective 1 Evaluate Salmonella contamination associated with farm production and carryover; evaluate consumer exposure in domestic homes and the effect of portion size on consumer exposure to Salmonella.  Objective 2 Food Safety Risk and Economic Optimality in Ready to Eat Turkey Products Objective 3 Evaluate strategies for communication comprehension, efficiency, and compliance related to risk in food processing consumption.  Objective 4 Evaluate how psychological and emotional factors contribute to food safety risk.  Objective 5 Risk Assessment of Salmonella contamination of different turkey meat products including organic, fresh, frozen, and ready to eat products from US Midwestern retail outlets, and different turkey meat products consumed by specific risk groups.  Objective 6 Merging and Data Analysis (Drs. Logue, Nganje, Sellnow, Hinsz and Khaitsa) data collected from the five objectives will be merged and included in the risk model to address issues of data gaps and new research which will enhance the project.  B. Risk Assessment for Pathogens of Food Safety Concern in Milk and Powdered Milk Products.  Objective 1 Assess the potential for raw milk as a source of Enterobacter sakazakii in powdered infant formula, and then examine isolates for relatedness to outbreak isolates that have been documented in the United States.  Objective 2 Assess the potential for milk and milk products as a source of other members of the Enterobacteriaceae, and as a source of antimicrobial resistance mechanisms.  Objective 3 Assess the potential for milk and milk products as a source of Mycobacterium avium subspecies paratuberculosis.  C. Intelligent Quality Sensors for Food Safety  Objective 1: Identification of liquid metabolites associated with meat contaminated with Salmonella.  Objective 2: Characterization of liquid metabolites using Raman Spectroscopy.  Objective 3: Fabrication and evaluation of different sensing materials for detecting specific indicator gaseous compounds associated with meat contamination due to Salmonella.  Objective 4: Investigate on developing pattern recognition techniques for enhancing the performances of our electronic nose modules.  Objective 5: Evaluate the performance of integrated electronic nose module in field-conditions.
APPROACH: 1) Studies will investigate Salmonella in turkeys from entry into rearing barns to slaughter.  Molecular analysis will further define the pathotype of the organism and the transfer between flock rotations.  Domestic exposure of consumers to Salmonella in homes will be evaluated.  2) The empirical model will include optimal intervention strategy at the retail (consumer) level.  The associated risks, costs and benefits of alternative mitigation strategies (e.g., generic and augmented HACCP) for Salmonella are evaluated jointly.  3) Studies will test potential risk communication messages that contain varying strategies related to culture, learning styles, public outrage, and message source in order to determine message receptivity.  The messages will be tested with diverse publics, including general American macro-culture and underserved populations.  We will test differences in message receptivity, and develop strategies for adapting risk messages to meet the needs of various audiences.  4) Studies will test whether the activation of the disgust emotion heightens perceptions and judgments of risk and diminishes willingness to approach and interact with foods appearing to have properties associated with contamination.  Food handlers and preparers reports of key practices will be assessed.  5) Different turkey meat products including organic, fresh, frozen, and ready to eat products from retail outlets will be randomly sampled and tested for the presence of Salmonella.  6) Data and information from all studies will be merged and reported in a range of media.  B. Risk Assessment for Pathogens of Food Safety Concern in Milk and Powdered Milk Products.  Initial Approach to All Objectives: Assess the potential for milk and milk products as a source of Enterobacter sakazakii, other members of the Enterobacteriaceae, and M. avium subsp. paratuberculosis on raw milk samples.  Culturing procedures for E. sakazakii and M. avium subsp. paratuberculosis have been optimized with newly developed and commercially available media.  An improved method for isolation of M. avium subsp. paratuberculosis from bulk tank milk samples will be implemented.  C. Intelligent Quality Sensors 1) Representative meat samples will be analyzed using HPLC technique to determine their constituents and identify indicator metabolites. 2)  The identified metabolites (compounds) will be characterized using SERS (surface enhanced) Raman spectroscopy.  3) Detectors will be fabricated based on their novel sensing characteristics to provide additional sensitivity to the indicator compounds.  4) We will use the responses of different electronic nose modules to determine probability density functions (pdf), which will be used to generate additional numbers of simulated data sets which will be used to develop and evaluate classification or prediction models using neural networks techniques.  5) The framework for integrated prototype electronic nose will be developed.  The integrated nose modules will then be further evaluated for discriminating Salmonella contaminated meat samples.
PROJECT CONTACT:     
     Name: Freeman, D. A.  Phone: 701-231-8504  Fax: 701-231-9692
     Email: douglas.freeman@ndsu.edu

 

PROJ TYPE: HATCH PROJ STATUS: TERMINATED
MULTISTATE PROJ NO: NC-107
START: 01 OCT 2001 TERM: 30 SEP 2006 FY: 2004
INVESTIGATOR: Sreevatsan, S.
PERFORMING INSTITUTION: Food Animal Health Research Program.  Ohio State University.  1680 Madison Avenue Wooster, Ohio 44691
SUBJECT:  Evolving pathogens, targeted sequences, and strategies for control of bovine respiratory disease.
NON-TECHNICAL SUMMARY: Chronic respiratory disease is one of the most important disease problems in cattle.  The project addresses emerging and reemerging agents, pathogenesis, and intervention strategies of chronic respiratory diseases of cattle.
OBJECTIVES: Our research will focus on the following three objectives: 1) Identify emerging and re-emerging agents and develop diagnostic methods for bovine respiratory disease (BRD); 2)  Characterize mechanisms and intervention targets in pathogenesis of BRD at the molecular, cellular and host level; 3) Develop intervention strategies for critical control points to reduce impact of BRD.
APPROACH: The new project will generate data on pathogen patterns and better diagnostic methods that can be used for better treatment and control measures.  Understanding the mechanisms used by the various agents of BRD to persist on the host, and produce inflammatory and immune responses are needed fo the characterization of novel intervention targets that can minimize the use of antibiotics.
PROGRESS: 2001/10 TO 2006/09This project was terminated.
IMPACT: 2001/10 TO 2006/09This project was terminated.
PUBLICATIONS: 2001/10 TO 2006/09
No publications reported this period
PROJECT CONTACT:     
     Name: Sreevatsan, S.  Phone: 330-263-3745  Fax: 330-263-3677 
     Email: sreevatsan.1@osu.edu

 

PROJ TYPE: HATCH PROJ STATUS: NEW
MULTISTATE PROJ NO: S-1000 START: 01 OCT 2001 TERM: 30 SEP 2006 FY: 2005
INVESTIGATOR: Keener, H. M.
PERFORMING INSTITUTION: Food, Agric and Biological Engineering.  Ohio State University.  1680 Madison Avenue Wooster, Ohio 44691
SUBJECT:  Animal manure and waste utilization, treatment and nuisance avoidance for a sustainable agriculture.
NON-TECHNICAL SUMMARY: A. Livestock manures applied as liquids sometimes move offsite through the soils macropores to tile lines causing surface water pollution.  B. Nutrients in manures incur high transportation cost and often generate odors when applied in liquid form.  A This project examines ways to minimize offsite movement of applied liquid manures.  B This project is to develop cost effective systems for converting liquid manures to solid manures by changing manure handling practices with the focus on composting.
OBJECTIVES: Development management tools, strategies and systems for land application of animal manures and effluents that optimize efficient, environmentally friendly utilization of nutrients and are compatible with sustained land and water quality.  2. Develop, evaluate, and refine physical, chemical and biological treatment processes in engineered and natural systems for management of manures and other wastes.  3. Develop methodology, technology, and management practices to reduce odors, gases, airborne microflora, particulate matter, and other airborne emissions from animal production systems.  4. Develop and evaluate feeding systems for their potential to alter the excretion of environmentally-sensitive nutrients by livestock.
APPROACH: 1. Investigate rheology of liquid waste as a function of water content.  Evaluate flow through various pore sizes in soil using laboratory and field test plots.  2. Determine kinetic parameters and odor levels during composting of animal manure/amendment mixes using various aeration patterns in pilot scale vessels.  Determine the rates of decomposition and moistures loss under full scale windrow composting.  Develop simulation models of compost process and use to optimize design and management of compost systems.  3. Evaluate new housing concepts for poultry and swine, evaluating the characteristics of manure generated products along with doing material balances for N,P,K, and water.  Focus of research are belt battery systems for poultry and high rise hog facilities.
PROGRESS: 2005/01 TO 2005/12  Results reported for: plant growth studies in soilless mixes made with cardboard bedding/horse manure compost (Wilkinson et al.); dry matter and NH3 loss when composting dairy manure amended with straw, sawdust and sand bedding (Michel et al.); concentrations of malodorous volatile chemicals emitted during composting dairy manure (Willett et al.); spatial and temporal distributions of air quality on large dairy farms and swine facilities in Ohio (Zhao et al.); leaching of suspended solids, total dissolved solids, ammonia nitrogen, phosphorous and potassium from dairy cow manure/sawdust composting in windrows (Keener et al.).  Willet noted during windrow composting, addition of small quantities of air (1.6 g/kg/hr) was sufficient to maintain aerobic conditions.  Zhao noted for dairy, inside average dust mass concentrations range from 0.9 to 1.5 mg/m3 and ammonia concentrations range from 1.4 to 3 ppm in different seasons.  Keener reported loss factors for %NH3-N, P and K from composts for 3 ages of compost, 0, 16.5 and 30 days and noted results can be applied to the design of control structures for treating runoff from compost pads.  Manuzon reported on the design and efficiency of an NH3 spray scrubber from emissions from caged layer operations.  Noted improved efficiency if used acid in water.  Michel and Grewal and Michel et al.) reported on persistence of dairy and swine manure pathogens - Escherichia coli O157:H7, Listeria monocytogenes, Salmonella spp., and Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis) during composting (55 degrees C), manure pack (25 degrees C) and liquid storage.  M. paratuberculosis was most persistent of organisms studied.  Evaluation of all results indicate thermophilic composting should be recommended for manures destined for pathogen sensitive environments such as vegetable production.  Keener and Michel presented generalized equations for predicting ammonia emissions from all classes of livestock operations.  The analysis uses a control volume approach and N/ash ratios.  It does not require measuring total masses of materials into and from the system, can be highly accurate for time averaged emissions, and significantly lower in cost than monitoring ammonia concentrations and airflow to evaluate NH3 emissions.  Darr et al. developed and evaluated a controller area network's ability to transmit sensor data over the long transmission distances common to livestock facilities.  Effective transmission distance was directly correlated to the data bus rate.  A bus rates of 50 kbits/sec or less can accurately deliver CAN messages up to 600 meters on a continuous basis.  Keener conducted laboratory studies on liquid dairy and swine manure to determine viscosity and flow rates of manures through macropores of 7.24 mm (0.285 inches).  Dairy manure had a higher viscosity than the hog manure at comparable moisture level. Results of 7.24 mm sieve test showed swine manure with solids 13.2% and dairy manure with 5.8% had flow-abilities 1/10 that of water.  Results indicated fresh dairy manure (12% solids) posses little risk of flow, while swine manure (11% solids) poses a potential risk.
IMPACT: 2005/01 TO 2005/12  Reduce monitoring cost and accuracy of assessing ammonia emissions.  Modified mass balance approach for evaluating NH3 emissions is lower cost than current methods of assessing NH3 emissions based on concentrations and gas flow rates.  Lowering manure moisture significantly reduces potential for preferential flow.  Results of studies on manure viscosity and flow-ability (relative to water) shows that lowering manure moisture, i.e. increasing solids, would be effective in preventing preferential flow at time of application.
PUBLICATIONS: 2005/01 TO 2005/12
1. Darr,M.J., Zhao,L., Ehsani,M.R., Ward,J.K. and Stombaugh,T.S. 2005. Evaluation of controller area network data collection system in confined animal feeding operations. pp. 179-187 in Seventh International Livestock Environment Symposium (18-20 May 2005, Beijing, China), ed. Tami Brown-Brandl and Ronaldo Maghirang. American Society of Agricultural Engineers, St. Joseph, Michigan.
2. Keener, H.M. 2005. Evaluation of manure flow-ability. Final Report. 9/2. GLRWCP. OSUE. 7p.
3. Keener, H.M. and F.C. Michel Jr. 2005. Predicting NH3 emissions from manure N for caged layer facilities. A modified mass balance approach. Symposium on the State of Science of Animal Manure and Waste Management. 1/5-7. Marriott River Center, San Antonio, TX. Search at http://www.cals.ncsu.edu/waste_mgt/natlcenter/sanantonio/proceedings.htm
4. Keener, H.M., T.F. Wilkinson, F.C. Michel Jr. and L.C. Brown. 2005. Evaluation of leaching from composting windrows using a rainfall simulator. 2005 Animal Waste Management Symposium. 10/5-7. Sheraton Imperial Hotel and Conference Center, Research Triangle Park, North Carolina
5. Michel, Jr., F. C., S. Grewal. 2005. Persistence of Mycobacterium avium subsp. paratuberculosis and other pathogens during composting, manure pack and liquid storage of dairy manure. 1/5-7. Marriott River Center, San Antonio, TX. Search at www.cals.ncsu.edu/waste_mgt
6. Michel Jr., F.C., H.M. Keener, J. Rigot, T. Wilkinson and J. Pecchia. 2005a. Effects of straw, sawdust and sand bedding on dairy manure composting. Symposium on the State of Science of Animal Manure and Waste Management. 1/5-7. Marriott River Center, San Antonio, TX. Search at www.cals.ncsu.edu/waste_mgt
7. Michel Jr., F C., S.K. Grewal, S. Rajeev, and S. Sreevatsan. 2005b. Persistence of Microbial Pathogens during Composting, Liquid-Storage and Pack Storage of Dairy and Swine Manures. 2005 Animal Waste Management Symposium. 10/5-7. Sheraton Imperial Hotel and Conference Center, Research Triangle Park, North Carolina. Search at http://www.cals.ncsu.edu/waste_mgt/
8. Manuzon, R.B. (L.Y. Zhao, advisor). 2005. Development of a Prototype Spray Scrubber for Reducing Ammonia Emissions from Poultry Facilities Exhaust Fans. MS Thesis. The Ohio State University, Columbus, OH.
9. Wilkinson, T.F., H.A.J. Hoitink and H.M. Keener. 2004. Evaluation of approaches for composting cardboard bedding/horse manure - Phase II: Plant growth in compost mixes. NABEC Paper 05-003. Presented at 2005 NABEC Conference, 8/7-10. Lewes, Delaware.
10. Willet, L.B., D.L. Elwell, H.M. Keener, D.C. Borger. 2005. Volatile emissions from composting dairy manures as indicators of bioprocesses and objectionable odors. Final Report. May 15. APWMC. NCSU.
11. Zhao, L. Y., M. Brugger, R. Manuzon, G. Arnold, E. Imerman. 2005a. Study of air quality spatial and temporal distributions on large dairy farms in Ohio. pp. 188-197 in Seventh International Livestock Environment Symposium (18-20 May 2005, Beijing, China), ed. Tami Brown-Brandl and Ronaldo Maghirang. American Society of Agricultural Engineers, St. Joseph, Michigan.
12. Zhao, L. Y., R. Manuzon, M. Brugger, G. Arnold, R. Bender. 2005b. Air quality of swine wean-finish facilities with deep-pit and pull-plug-lagoon manure storage systems. pp. 207-215 in Seventh International Livestock Environment Symposium (18-20 May 2005, Beijing, China), ed. Tami Brown-Brandl and Ronaldo Maghirang. Copyright 2005 American Society of Agricultural Engineers, St. Joseph, Michigan.
PROJECT CONTACT:     
     Name: Keener, H. M.  Phone: 330-263-3856  Fax: 330-263-3670 
     Email: keener.3@osu.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 MAR 1999 TERM: 31 DEC 2001 FY: 2003
INVESTIGATOR: Smith, B. B.
PERFORMING INSTITUTION: College of Vet Medicine.  Oregon State Univ.  Corvallis, Oregon 97331
SUBJECT:  Pathogenesis of Mycobacterium paratuberculosis (Johne's disease) in the llama.
NON-TECHNICAL SUMMARY: Johne's disease is a serious intestinal disease in the llama and alpaca caused by the bacteria Mycobacterium paratuberculosis which causes ill thrift, chronic weight loss and severe diarrhea.  The purpose of this project is to establish the temporal relationship between infection and 1) shedding of the bacteria, 2) the time of onset of clinical symptoms, and 3) the development of antibodies to the infection.
OBJECTIVES: Specific study objectives are: 1) Measure the lag time between experimental infection with MpTB and the onset of clinical symptoms, seroconversion, and fecal shedding of the organism in newborn and mature llamas.  2) Evaluate possible age related differences in susceptibility to infection.  3) Determine if MpTB can be detected in feces within days following oral ingestion but prior to establishing a patent infection.
APPROACH: Six adult and six juvenile llama pairs will be experimentally infected per os with 5x10(6) CFU of an IS900 positive strain of MpTB on alternate days for 14 days. Fecal and serum samples will be collected at prescribed intervals: a) to establish if viable MpTB can be detected in the feces within hours to days following ingestion but prior to establishment of an infection, b) to determine the time lag between exposure and the onset of symptoms, seroconversion, and fecal shedding of MpTB, c) to test if there is an age relted difference in susceptibility to MpTB infections, and d) to characterize the development of the disease under controlled conditions.
PROGRESS: 1999/03 TO 2001/12  Project terminated
IMPACT: 1999/03 TO 2001/12  Data will be available for other studies
PUBLICATIONS: 1999/03 TO 2001/12 
None available at this time 2002
PROJECT CONTACT:     
     Name: Smith, B. B.  Phone: 541-737-6942 
     Email: smithbr@ccmail.orst.edu

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT PROJ STATUS: NEW
START: 01 SEP 2003 TERM: 31 AUG 2008 FY: 2005
INVESTIGATOR: Karns J S; Van Kessel J S; Whitlock R H
PERFORMING INSTITUTION: Veterinary Preventive Medicine.  Univ of Pennsylvania.  Philadelphia, Pennsylvania 19104
SUBJECT:  Pilot study of factors affecting maintenance of Mycobacterium, Salmonella, E. coli and Listeria on dairy farms.
OBJECTIVES: The objective of this research is to set up a Pilot Program consisting of two dairy herds to focus on the protocol development, laboratory set-up, program logistics, and database and bio-bank development needed to evaluate the impact of intervention strategies on Johne's disease dynamics, milk and beef quality (particularly with respect to zoonotic bacterial pathogens), economics and sustainability through intensive longitudinal follow up of selected research/demonstration dairy farms.  Long term goals are to validate intervention strategies to support BMP's and to optimize intervention and monitoring strategies given the constraints on time, labor and financial resources in modern dairy herds.  In addition, a national resource bank (data and biological specimens on well-characterized animals) will be created for current and future monitoring and research on dairy cattle diseases.  Emphasis will be on longitudinal data collection on endemic infectious diseases of public health and animal health concern in dairy herds. APPROACH: Pathogens are of increasing concern on dairy farms and in dairy products.  The production of safe and wholesome food from US farms requires control of the production process on the farm.  Specific focus areas in this process are biosecurity, food safety and animal health.  To be able to scientifically support regional process control programs there is a need for longitudinal research on commercial dairy farms throughout the United States.  In this collaboration, Cornell University, The Pennsylvania State University, University of Vermont, and the University of Pennsylvania, all participants in the Regional Dairy Quality Management Alliance (RDQMA), and the USDA's Environmental Microbial Safety Laboratory (EMSL) will investigate the sites on operating dairy farms that act as reservoirs for pathogenic microorganisms that affect animal health and that decrease product quality because of their zoonotic nature.  Several farms will be identified as candidates for this investigation and 3 will be chosen for extensive sampling based on the previous occurrence of Johne's disease and/or Salmonella infection.  Serum, feces, bulk tank milk, and environmental samples (water, bird and rodent feces, feed, etc.) will be taken on each farm.  In addition, tissue samples will be obtained from carcasses of culled animals.  Samples will be distributed among the university and ARS researchers for analysis to determine the presence of Mycobacterium avium paratuberculosis (the causative agent of Johne's disease in cattle) and for Salmonella enterica, Escherichia coli O157:H7, and Listeria monocytogenes (human food-borne pathogens of concern in dairy products).  This research will be the first to attempt a comprehensive analysis of both Johne's disease and food-borne pathogens on working dairy farms.  It will allow us to determine a baseline for these organisms on two farms and set the stage for investigation of the effect of interventions, in the form of best management practices (BMPs), on animal health and product quality.
PROGRESS: 2003/10 TO 2004/09  4. What were the most significant accomplishments this past year? 4D.  This report serves to document research conducted under a Specific Cooperative Agreement between ARS and the University of Pennsylvania. Additional details of research can be also be found in the report for the parent CRIS: 1265-32000-074-00D titled: Dairy Management Practices and the Transmission of Zoonotic Pathogens in Milk.  This cooperative agreement is part of a larger project involving three Universities, the University of Pennsylvania, Penn State University and Cornell University, formulated under the advise and consultation with the Notheastern Regional Dairy Quality Alliance (RDQMA) and the National Milk Producers federation.  The core of the project involves the identification of dairy farms in New York and Pennsylvania that are suitable for a long-term longitudinal study of on-farm ecology and epidemiology of human or cattle pathogens.  These farms have been identified but will remain anonymous and sample collection protocols have been developed and successfully carried out.  The purpose of the project from the perspective of our lab (EMSL) is to characterize the microbial populations on the farm with particular interest in Salmonella and Listeria strains occurring in the farm environment.  When this characterization for each farm is completed, dairy management practices will be implemented to determine the effect of the change in practices on the microbial ecology and distribution.  Initial findings from 4 different samplings of the two farms have shown that potentially pathogenic forms of Listeria monocytogenes and strains of Salmonella are recoverable from animals and a variety of environmental samples. Since this is the initial year of the project, no data has yet been gathered with respect to management practice influence.
PUBLICATIONS: 2003/10 TO 2004/09
No publications reported this period.

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT PROJ STATUS: NEW
START: 01 SEP 2003 TERM: 31 AUG 2008
INVESTIGATOR: Karns J S; Van Kessel J S; Jayarao B M
PERFORMING INSTITUTION: Veterinary Science. Pennsylvania State University.  University Park,  Pennsylvania 16802
SUBJECT:  Pilot study of factors affecting maintenance of Mycobacterium, Salmonella, E. coli and Listeria on dairy farms.
OBJECTIVES: The objective of this research is to set up a Pilot Program consisting of two dairy herds to focus on the protocol development, laboratory set-up, program logistics, and database and bio-bank development needed to evaluate the impact of intervention strategies on Johne's disease dynamics, milk and beef quality (particularly with respect to zoonotic bacterial pathogens), economics and sustainability through intensive longitudinal follow up of selected research/demonstration dairy farms.  Long term goals are to validate intervention strategies to support BMP's and to optimize intervention and monitoring strategies given the constraints on time, labor and financial resources in modern dairy herds.  In addition, a national resource bank (data and biological specimens on well-characterized animals) will be created for current and future monitoring and research on dairy cattle diseases.  Emphasis will be on longitudinal data collection on endemic infectious diseases of public health and animal health concern in dairy herds. APPROACH: Pathogens are of increasing concern on dairy farms and in dairy products.  The production of safe and wholesome food from US farms requires control of the production process on the farm.  Specific focus areas in this process are biosecurity, food safety and animal health.  To be able to scientifically support regional process control programs there is a need for longitudinal research on commercial dairy farms throughout the United States.  In this collaboration, Cornell University, The Pennsylvania State University, University of Vermont and the University of Pennsylvania, all participants in the Regional Dairy Quality Management Alliance (RDQMA), and the USDA's Environmental Microbial Safety Laboratory (EMSL) will investigate the sites on operating dairy farms that act as reservoirs for pathogenic microorganisms that affect animal health and that decrease product quality because of their zoonotic nature.  Several farms will be identified as candidates for this investigation and 3 will be chosen for extensive sampling based on the previous occurrence of Johne's disease and/or infection.  Serum, feces, bulk tank milk, and environmental samples (water, bird and rodent feces, feed, etc.) will be taken on each farm.  In addition, tissue samples will be obtained from carcasses of culled animals.  Samples will be distributed among the university and ARS researchers for analysis to determine the presence of Mycobacterium avium paratuberculosis (the causative agent of Johne's disease in cattle) and for Salmonella enterica, Escherichia coli O157:H7, and Listeria monocytogenes (human food-borne pathogens of concern in dairy products).  This research will be the first to attempt a comprehensive analysis of both Johne's disease and food-borne pathogens on working dairy farms.  It will allow us to determine a baseline for these organisms on two farms and set the stage for investigation of the effect of interventions, in the form of best management practices (BMPs), on animal health and product quality.
PROGRESS: 2003/10 TO 2004/09  4. What were the most significant accomplishments this past year? 4D.  This report serves to document research conducted under a Specific Cooperative Agreement between ARS and Pennyslvania State University.  Additional details of research can be also be found in the report for the parent CRIS: 1265-32000-074-00D titled: Dairy Management Practices and the Transmission of Zoonotic Pathogens in Milk.  This cooperative agreement is part of a larger project involving three Universities, the University of Pennsylvania, Penn State University and Cornell University, formulated under the advise and consultation with the Notheastern Regional Dairy Quality Alliance (RDQMA) and the National Milk Producers federation.  The core of the project involves the identification of dairy farms in New York and Pennsylvania that are suitable for a long-term longitudinal study of on-farm ecology and epidemiology of human or cattle pathogens.  These farms have been identified but will remain anonymous and sample collection protocols have been developed and successfully carried out.  The purpose of the project from the perspective of our lab (EMSL) is to characterize the microbial populations on the farm with particular interest in Salmonella and Listeria strains occurring in the farm environment. When this characterization for each farm is completed, dairy management practices will be implemented to determine the effect of the change in practices on the microbial ecology and distribution. Initial findings from 4 different samplings of the two farms have shown that potentially pathogenic forms of Listeria monocytogenes and strains of Salmonella are recoverable from animals and a variety of environmental samples. Since this is the initial year of the project, no data has yet been gathered with respect to management practice influence.
PUBLICATIONS: 2003/10 TO 2004/09
No publications reported this period.

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT PROJ STATUS: TERMINATED CONTRACT/GRANT/AGREEMENT NO: 58-3625-8-120
START: 01 JUN 1998 TERM: 01 JUN 2001 FY: 2001 GRANT YR: 1998 GRANT AMT: $38,300
INVESTIGATOR: Stabel, J. R.; Miller, J. M.; Whitlock, R.
PERFORMING INSTITUTION: Clinical Studies. Univ of Pennsylvania. Kennett Square, Pennsylvania 19348
SUBJECT:  Biology and immune response of cattle naturally infected with Mycobacterium paratuberculosis.
OBJECTIVES: 1) To determine the temporal effect of paratuberculosis infection on gamma- interferon production in cattle and to estimate sensitivity and specificity for detection of subclinically infected cattle; To define the temporal variation of the humoral immune response directed against Mycobacterium paratuberculosis in cattle naturally infected; and To more precisely estimate the true infection rate of cattle within an infected herd by following all culled cattle to slaughter over a three-year period.
APPROACH: The principal long term goal of this project is to develop more sensitive and specific diagnostic tests enabling earlier detection of preclinical paratuberculosis infection in cattle. Specifically, we will monitor the immune response of cattle naturally infected with M. paratuberculosis over a three (3) year period.  The immune response to M. paratuberculosis infection will be monitored using established serological tests, such as the ELISA and gamma interferon (g-IFN) assays that measure humoral (antibody) specific and cell-mediated specific immune reactions, respectively.  Concurrent determination of responses in cattle naturally infected with M. paratuberculosis will help to better define the host-pathogen interaction and provide a valuable assessment of the comparative sensitivity and specificity of the ELISA and g-IFN assays as diagnostic tools for diagnosis of M. paratuberculosis infection in cattle.  The results of the serological tests will be compared to fecal culture results, as well as tissue culture results for cull animals.
PROGRESS: 2000/10 TO 2001/09  1. What major problem or issue is being resolved and how are you resolving it? Paratuberculosis (Johne's disease) is a chronic, progressive enteric disease of ruminants caused by infection with Mycobacterium paratuberculosis.  Economic losses are estimated to be $200/infected cow/year and are the result of animal culling, reduced milk production, poor reproductive performance, and reduced carcass value.  Research on improved diagnostic tests for detection of this disease will provide tools for reducing contamination of the environment with M. paratuberculosis and the spread of infection within a herd.  Research on the pathogenesis and immunology of M. paratuberculosis infections of cattle is conducted within a specific cooperative agreement with the University of Pennsylvannia to allow design of more rational diagnostic and on-farm control measures.  Better diagnostic tests to allow early detection of subclinically infected animals will reduce the incidence of disease in herds.  2. How serious is the problem? Why does it matter?  Johne's disease has become a high priority disease for the cattle industry.  Herd prevalence of Johne's disease is estimated to be 22-40% as determined by the recent NAHMS survey of dairy cattle.  The economic impact of this disease on the dairy industry alone is estimated to be over $200 million per year based upon figures generated in 1996 and is growing each year with the continued spread of this disease.  In addition, M. paratuberculosis has been implicated as a causative factor in Crohn’s's disease, a chronic inflammatory bowel disease in humans, which has served as a further impetus to control this disease in our national cattle industry.  The dairy industry must be assured that they are providing a clean, safe product to consumers.  3. How does it relate to the National Program(s) and National Component(s)?  This collaborative research effort between ARS and the University of Pennsylvannia falls under the Animal Health National Program and is consistent with the needs of the cattle industry for improved diagnostic techniques and control measures for Johne's disease in cattle.  This collaborative research effort has the objective of evaluating the efficacy of current diagnostic tools for Johne's disease during different stages of disease in a known infected herd, from calfhood through adulthood, and understanding host immunity based upon these diagnostic tests during the different stages of disease.  This objective contributes to the National Program Components on Pathogen Detection and Epidemiology of Disease.  4. What were the most significant accomplishments this past year?  A. Single Most Significant Accomplishment during FY 2001 year:  This 3-year study was designed to evaluate current diagnostic tools for Johne's disease and determine efficacy of each during different stages of disease.  This research on the pathogenesis and immunology of M. paratuberculosis infections of cattle is conducted within a specific cooperative agreement with the University of Pennsylvannia to allow design of more rational diagnostic and on-farm control measures.  Data have been accrued on tissue culture, fecal culture, ELISA, gamma interferon, and histopathology over the 3-year period.  A meeting is scheduled between collaborators this fall for discussion of statistical analyses to be performed on this enormous dataset.  Thus far, histopathologic analysis of tissues from cull cows from this herd indicates that regions of localized lesions and colonization are consistent with the upper jejunum and not the ileal region as previously thought.  This information may be significant in understanding the pathogenesis of this disease, particularly in the early stages of infection.  The gamma-interferon test is useful in detecting heifers born to infected dams within the herd.  Use of the gamma-interferon test to identify animals in the early stages of disease will prompt management of these animals and allay further spread of infection throughout the herd.  Better diagnostic tests to allow early detection of subclinically infected animals will reduce the incidence of disease in herds.  Additional details of research can be found in the report for the parent project 3625-32000-046-00D Understanding Host- Pathogen Interactions for the Diagnosis and Control of Johne's Disease (Paratuberculosis). B. Other Significant Accomplishment(s), if any:  We have shown in collaboration with the University of Pennsylvannia and the University of Minnesota that calves born in the winter months are more likely to contract Johne's disease than calves born during summer months.  This information is critical for on-farm management of maternity pens during poor weather conditions.  C. Significant Accomplishments/Activities that Support Special Target Audiences: None.  D. Progress Report: Research on the pathogenesis and immunology of M. paratuberculosis infections of cattle is conducted within a specific cooperative agreement with the University of Pennsylvannia to allow design of more rational diagnostic and on-farm control measures.  Additional details of research can be found in the report for the parent project 3625-32000-046-00D Understanding Host-Pathogen Interactions for the Diagnosis and Control of Johne's Disease (Paratuberculosis).  Over the 3-year period of this study, samples from 160 animals (cows, heifers, calves) within a dairy herd with 20% infection rate have been taken quarterly and processed by various diagnostic tests.  Tissue samples from cull cows have been processed by culture and histopathology to detect lesions associated with Johne's disease.  The NADC was responsible for processing blood samples for gamma- interferon, tissue culture and histopathology.  The University of Pennsylvannia was responsible for fecal culture and PCR and ELISA tests.  Results from these tests will be compiled later this year and analyzed for efficacy in diagnosis of early and late stage disease.  These results will be helpful in providing management tools for the producer to control the spread of disease within his herd.  5. Describe the major accomplishments over the life of the project including their predicted or actual impact.  Many states are implementing voluntary control programs for Johne's disease in cattle and a nationwide control program has been suggested.  During the past three years (of a 3 to 5 year proposed term) of this collaborative effort we have demonstrated that the gamma-interferon test is extremely sensitive for detection of subclinically infected cows and heifers and is a good screening tool when combined with the commercial ELISA test.  This information will have a major impact on the selection of diagnostic tools for culling infected animals from a herd.  Early detection of disease will allay the spread throughout the herd and reduce subsequent economic losses due to reduced production, reproductive problems, and culling costs.  6. What do you expect to accomplish, year by year, over the next 3 years? 2002 - Analysis of the enormous data set that has been amassed over the 3 year term of the study with collaborators at University of Pennsylvannia and University of Minnesota.  This study should provide unique information on transmission of infection within a herd as well as the most efficacious diagnostic tool(s) to use for detection of early and late stages of disease.  This study should result in several manuscripts.  7. What science and/or technologies have been transferred and to whom?  When is the science and/or technology likely to become available to the end user (industry, farmer, other scientists)?  What are the constraints if known, to the adoption & durability of the technology product?  Thus far no technologies have been transferred based upon information accrued from this collaborative effort.  Constraints to any technology transfer include the accumulation of data over a 3 to 5 year period.  8. List your most important publications in the popular press (no abstracts) and presentations to non-scientific organizations and articles written about your work (NOTE: this does not replace your peer-reviewed publications which are listed below)
PUBLICATIONS: 2000/10 TO 2001/09
1. Wells, S.J., Whitlock, R.H., Lindeman, C., Stabel, J.R. Evaluation of fecal culture pools for detection of Mycobacterium avium subsp. paratuberculosis in groups of dairy cows. AAVLD 2000 meeting, Birmingham, AL. 2000. Abstr. p. 15.
2. Wells, S.J., Whitlock, R.H., Stabel, J.R.  Descriptive epidemiology of Johne's disease in an infected dairy herd. International Society for Veterinary Epidemiology and Economics Meeting. 2000. Abstr. p. 77.

 

PROJ TYPE: HATCH PROJ STATUS: TERMINATED
START: 01 JAN 1999 TERM: 31 DEC 2003 FY: 2004
INVESTIGATOR: Correll, P. H.
PERFORMING INSTITUTION: Veterinary Science.  Pennsylvania State University.  University Park, Pennsylvania 16802
SUBJECT:  Role of the STK receptor in macrophage activation and inflammation.
OBJECTIVES: Examine how the absence of the STK signaling pathway in IFN-gamma-activated macrophages affects the production of Nitric Oxide, the biochemical method by which this occurs, and the effect of STK on Mycobacterium paratuberculosis infection.
APPROACH: Utilize STK-deficient mice to determine whether STK is acting through other known regulators of NO production.  Utilize the RAW264.7 macrophage cell line to determine the biochemical mechanisms by which STK suppresses NO.  Infect STK-deficient mice with mycobacterium paratuberculosis to determine the effect of STK on the infection process and its potential role in Johne's and Crohn’s's disease.
PROGRESS: 1999/01 TO 2003/12   Macrophages are a diverse and dynamic population of cells that play a key role in host defense as well as in the maintenance of normal tissue structure and function.  However, inappropriate activation of macrophages can promote inflammation and tissue damage through the production of inflammatory mediators, such as nitric oxide, and the support of Th1 differentiation and the production of IFN-(gamma) which feeds back positively to further activate pro-inflammatory macrophage activities.  It has been suggested that changes in the threshold of signal required for classical macrophage activation may promote the progression of autoimmune disease by enhancing Th1 differentiation through the upregulation of IL-12 and MHC Class II, thus generating a positive feedback loop for further tissue destruction.  We propose that the threshold for classical macrophage activation is set, in part, by the expression of receptor tyrosine kinases (RTKs) on these cells and that RTKs may represent a new class of therapeutic targets for regulating the tissue-damaging effects of autoimmunity.  We have shown previously that the STK receptor tyrosine kinase inhibits the production of nitric oxide through the downregulation of inducible nitric oxide synthase (iNOS) expression while, at the same time enhancing expression of arginase, an enzyme that competes with iNOS for the substrate, L-arginine, resulting in cell proliferation and matrix synthesis.  Thus we concluded that the expression of STK on tissue-resident macrophages tips the balance of these cells from cytotoxic mediators to cells with more reparative functions.  More recently, we have shown that STK inhibits the production of IL-12 and the expression of MHC Class II by macrophages, resulting in a reduction in the ability of these cells to support Th1 differentiation in vitro.  Subsequently, mice with a targeted deletion in STK are more susceptible to endotoxic shock and exhibit more inflammation in a delayed-type hypersensitivity response.  In the past year, we have set out to determine whether the expression of the STK receptor tyrosine kinase on tissue-resident macrophages regulates the progression of autoimmunity.  Our preliminary data suggests that the progression of autoimmune disease is dramatically enhanced in the absence of STK.
IMPACT: 1999/01 TO 2003/12  Regulation of macrophage activation is critical in order to maintain a balance between an effective immune response and inflammatory-mediated tissue damage and cell death.  This work is an important step toward understanding the regulatory mechanisms that govern macrophage activation and may eventually lead to the identification of targets for regulating chronic inflammation.
PUBLICATIONS: 1999/01 TO 2003/12
1. Forgie A, Wyatt S, Correll PH and Davies AM. 2003. Macrophage stimulating protein (MSP) is a novel target-derived neurotrophic factor for developing sensory and sympathetic neurons. Development. 130 (5): 995-1002.
2. Teal HE, Craici A, Paulson RF and Correll PH. 2003. MSP potentiates erythropoietin receptor signaling in primary erythroid progenitors. J Hem Stem Cell Res 12, 165-177.
3. Lutz MA, Liu Q-P and Correll PH. 2003. Activation of complement-mediated phagocytosis by MSP requires the RON receptor, tyrosine kinase activity, phosphatidylinositol 3-kinase and protein kinase C-(geta). J Leuko Biol 73 (6), 802-814

 

PROJ TYPE: SPECIAL GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2005-34163-16014 PROPOSAL NO: 2005-06119
START: 01 AUG 2005 TERM: 31 JUL 2007 FY: 2005 GRANT YR: 2005 GRANT AMT: $656,525
INVESTIGATOR: Jayarao, B. M.; Perdew, G.; Key, D.; Love, B. C.; DebRoy, C.; Narasimha, H. V.; Heinrichs, A.; Wolfgang, D. R.
PERFORMING INSTITUTION: Veterinary Science.  Pennsylvania State University.  208 Mueller Laboratory.  University Park, Pennsylvania 16802
SUBJECT:  Bioreporter and molecular beacon-based technologies for detection of organic toxicants and bacterial pathogens in milk and milk products.
NON-TECHNICAL SUMMARY: Develop state of the art diagnostics for detection of organic toxicants and foodborne pathogens in milk and milk products  This project will focus on developing reliable and highly sensitive assays for detection of organic toxicants and foodborne pathogens in milk and milk products that can be used for monitoring and safeguarding milk supply and milk products.
OBJECTIVES: PROJECT 1: Bioreporter-based technology for detection of organic toxicants directly from milk and milk products Objective 1.1 Develop promoter-reporter gene constructs for detection of BETTX (benzene, ethylbenzene, toluene, trichloroethylene, and xylene) and PCBs.  Objective 1.2 Standardize bioreporter assays for detection of BETTX (benzene, ethylbenzene, toluene, trichloroethylene, and xylene) and PCBs in milk and milk products.  Objective 1.3 Survey milk and milk products for BETTX (benzene, ethylbenzene, toluene, trichloroethylene, and xylene) and PCBs along the food chain continuum.
PROJECT 2: Molecular beacon-based technology for detection of bacterial pathogens directly from milk and milk products Objective 2.1 Develop and standardize molecular-beacon based real-time PCR assays for, Campylobacter jejuni, Escherichia coli, Listeria monocytogenes, Salmonella spp., Staphylococcus aureus, Bacillus anthracis and Mycobacterium avium subsp. paratuberculosis.  Objective 2.2 Survey milk and milk products for bacterial pathogens along the food chain continuum using molecular beacon-based real-time PCR assays.
APPROACH: PROJECT 1: The toluene degradation operon (tod) that degrades benzene, ethylbenzene, toluene, tricloroethylene, and xylene (BETTX) will be amplified from the genomic DNA of the Pseudomonas putida (ATCC53902). The primers for the PCR amplification for the tod promoter and regulator elements will be designed using the tod sequence reported by Mosqueda and Ramos (2000). The biphenyl dioxygenase gene (bphA1) has been shown to degrade PCBs.  The gene will be amplified from genomic DNA of the Burkholderia cepacia (ATCC 55487).  The primers for PCR amplification for the bphA1gene will be designed using the bphA1gene sequence (AJ251217) in the NCBI nucleotide database.  The PCR amplified product will be cloned in to pGlow-TOPO vector (Invitrogen, Carlsbad, CA) containing green fluorescent protein (GFP) as reporter.  This individual plasmid constructs will then be introduced in to E. coli TOP10 (Invitrogen) by electroporation (BioRAD micropluser, Hercules, CA) for use as a bioreporter.  The transformed E. coli strains will be tested rigorously by exposing the strains to specific toxicants (concentration ranging from 10 microMol to 1 mMol) suspended in buffered peptone water.  Expression of GFP proteins by bioreporter E. coli strains will be measured by reading the intensity of fluorescence in a spectrofluorimeter at intervals of 90-, 120-, 180-, 210-, and 240 minutes of incubation.  PROJECT 2: Molecular beacons, PCR primers and PCR conditions that will be used to develop the assays will be from techniques reported in literature for C. jejuni (Sails et al., 2003), E. coli (Fortin et al, 2001), L. monocytogenes (Nogva et al 2000), Salmonella (Chen et al., 2000), B. anthracis (Verma-Basil et al., 2004), and M. avium subsp. paratuberculosis (Rodrigeuz-Lazaro et al., 2004).  The assays will be standardized using control molecular beacons, bovine cellular DNA and common milk bacterial DNA as internal standards.  The molecular beacon-based PCR assays will be developed and standardized individually for all seven organisms.
ASSAY APPLICATIONS: Milk and milk products, milk filters and colostrum will be collected and analyzed for organic toxicants and C. jejuni, E. coli, L. monocytogenes, Salmonella, S. aureus, B. anthracis and M. avium subsp. paratuberculosis. Raw milk from 10 dairy producers that supply milk to the processing plant will be traced along the food continuum (farm---milk hauler---milk silo---pasteurized milk in retail markets).  Samples will be collected over a period of 6 months from the farm, milk trucks, milk from the processing plant, and pasteurized milk sold by the processing plant in the retail markets.  In addition, cheese (domestic and imported), evaporated and condensed milk, non fat dry milk from retail stores will also be examined for bacterial pathogens.  A total of 10 dairy herds will be selected (milk collected by the same milk hauler and on the same milk route) and samples (milk filters, bulk tank milk, colostrum) will be collected once every 2-3 weeks by a trained technician.
PROJECT CONTACT:
     Name: Jayarao, B. M.  Phone: 814-863-5939  Fax: 814-863-6140
     E
mail:
bmj3@psu.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: TERMINATED CONTRACT/GRANT/AGREEMENT NO: 98-35204-6705
START: 01 SEP 1998 TERM: 31 AUG 2003 FY: 2003 GRANT YR: 1998 GRANT AMT: $300,000
INVESTIGATOR: Sweeney, R.; Scott, P.
PERFORMING INSTITUTION: School Of Veterinary.  Medicine Univ of Pennsylvania.  Philadelphia, Pennsylvania 19104
SUBJECT:  Role of cytokines in immune response to paratuberculosis vaccination in cattle.
OBJECTIVES: Determine the nature of the early local, systemic and intestinal immune response to subcutaneous M. paratuberculosis vaccination with or without IL-12 in infected and uninfected calves.  To correlate the early immune response following vaccination to clinical response to oral challenge
APPROACH: Calves will be infected by oral challenge with live M. paratuberculosis during the first week of life, then vaccinated at 14 days old using bacterin with or without IL-12.  One month after vaccination, calves will be euthanized and peripheral blood, cells from the lymph node draining the vaccination site and ileocecal lymph node cells will be harvested.  Lymphocytes will be cultured and antigen-specific lymphoproliferation and IFN-g production measured.  Cytokine gene expression will be measured using RT-PCR.  Humoral antibody responses in serum will be measured by ELISA.  Some of the calves will be housed in isolation for 20 months and monitored for immune response and fecal shedding of M. paratuberculosis and clinical signs of disease.  Calves will be euthanized and tissues will be harvested by lymphocyte culture and cytokine RT-PCR as above.  Extensive postmortem quantitative mycobacterium cultures of numerous tissues will be performed to compare severity of infection between groups.
PROGRESS: 1998/09 TO 2003/08  Calves were given subcutaneous commercially available paratuberculosis vaccine with or without human recombinant IL-12, and challenged orally with field strain live Mycobacterium paratuberculosis.  Subcutaneous vaccination induced an immune response in local lymph node and mesenteric lymph node, as measured by antigen-specific interferon-gamma production by lymph node cells.  However, vaccination did not prevent colonization of the intestines with M. paratuberculosis organisms.  When IL-12 was included, the intensity of the interferon-gamma response was not enhanced, but the cytokine gene expression for IL-10 was reduced.  In contrast with the commercially available vaccine, subcutaneous vaccination with a heat-killed field isolate M. paratuberculosis resulted in significant reduction in Mycobacterium tissue loads, compared with non-vaccinated controls.  Inclusion of IL-12 resulted in sterile immunity in some calves, but infection was not prevented in all animals.  In an attempt to better enhance mucosal immunity to paratuberculosis, oral vaccination was attempted in preliminary experiments.  Calves were orally inoculated with heat-killed field isolate of M. paratuberculosis within the first 24 hours of life, then challenged with homologous live field strain oraganisms.  Oral vaccination resulted in a less intense interferon-gamma response than that induced by subcutaneous vaccination.  However, preliminary results suggest vaccinated calves may have a reduced tissue load compared with unvaccinated controls.
IMPACT: 1998/09 TO 2003/08  The results of these experiments suggest that vaccination for paratuberculosis has the potential to prevent colonization with M. paratuberculosis organisms.  However, the currently commercially available product may not protect as well as vaccines prepared from field-isolate strains of the organism.  The results of these studies can help guide future research directed at developing vaccine strains of organism that can be given orally to protect against paratuberculosis infection.
PUBLICATIONS: 1998/09 TO 2003/081.
1. Uzonna, J.E., Chilton, P., 'Whitlock, R.H., Habecker, P.L., Scott, P. and Sweeney, R.W. 2003. Efficacy of commercial and field-strain Mycobacterium paratuberculosis vaccinations with recombinant IL-12 in a bovine experimental infection model. Vaccine. 21:3101-3109.
2. Uzonna, J.E., Whitlock, R.H., Scott, P. and Sweeney, R.W. Oral vaccination for paratuberculosis in calves. 2002. Proceedings 7th International Colloquium on Paratuberculosis, Bilbao, Spain, page 127.

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JAN 1999 TERM: 31 DEC 2001 FY: 2002
INVESTIGATOR: Sweeney, R.
PERFORMING INSTITUTION: School of Veterinary Medicine.  Univ of Pennsylvania.  Philadelphia, Pennsylvania 19104
SUBJECT:  Development of an effective vaccine for Johne's disease.
OBJECTIVES:  Paratuberculosis (Johne's Disease) is a progressive and ultimately fatal infection in cows caused by Mycobacterium paratuberculosis.  Currently available vaccines are not effective for preventing Johne's Disease.  The overall goal is to determine the characteristics of the host immune response to M. paratuberculosis vaccination that result in susceptibility or resistance to Johne's disease.
APPROACH: Determine the nature of the early local, systemic and intestinal immune response to subcutaneous M. paratuberculosis vaccination with or without IL-12 infected calves.  Correlate the early immune response following vaccination to clinical response and oral challenge.
PROGRESS: 1999/01 TO 2001/12  Subcutaneous vaccination with commercially available M. paratuberculosis vaccine induced both systemic and local (gut) interferon-gamma producing lymphocytes, but calves were not protected from challenge infection with live M. paratuberculosis organisms.  However, when calves were given subcutaneous vaccine produced from heat-killed field strain M. paratuberculosis, augmented with IL-12, there was a significant reduction in number of CFU of M. paratuberculosis recovered from tissues 4 weeks after challenge infection with virulent M. paratuberculosis.
PUBLICATIONS: 1999/01 TO 2001/12
No publications reported this period

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 01 SEP 2000 TERM: 31 AUG 2002 FY: 2002
INVESTIGATOR: Whitlock, R.
PERFORMING INSTITUTION: School of Veterinary Medicine.  Univ of Pennsylvania.  Philadelphia, Pennsylvania 19104
SUBJECT:  Molecular diagnostics for mycobacterial diseases in alpacas.
OBJECTIVES: A DNA probe with PCR amplification can be developed as a sensitive diagnostic test for Johne's disease in alpacas.  The PCR test should have a sensitivity to detect M. paratuberculosis superior to currently available fecal culture techniques with centrifugation and double incubation.  The major advantage would be the results available within a week after sample submission compared to 12-16 weeks for fecal cultures, with the current diagnostic test for Johne's Disease in ruminants and camelids.  Our objectives are to improve the sensitivity of our current DNA problem with PCR amplification for the detection of M. paratuberculosis in alpaca fecal samples that would be more sensitive than currently available fecal culture techniques using centrifugation.  Also, to develop two other DNA probe tests for other mycobacteria that may infect alpacas from time to time and to enhance the efficacy of the PCR test with an improved DNA harvesting from M. paratuberculosis.  Compare alternative DNA extraction protocols to reduce the technical stringency and to improve DNA yields.
APPROACH: Prepare serial dilutions of M. paratuberculosis that we have grown.  Aliquots will be saved for future PCR experiments to determine the lower limit of sensitivity of detection with PCR-DNA probe test.  The lower limit of detection will be determined in triplicate with two methods 1) in media and 2) by spiking fecal samples from alpacas known to be free of disease.  These experiments should provide an index of the lower limit of detection of the PCR probe.  The same serial dilutions will be mixed with alpaca fecal pellets to determine the lower limit of detection by the PCR test. Immunomagnetic beads will then be evaluated to further improve sensivitity of the best DNA extraction method.

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 15 MAY 2001 TERM: 30 NOV 2002 FY: 2002
INVESTIGATOR: Whitlock, R.
PERFORMING INSTITUTION: School of Veterinary Medicine.  Univ of Pennsylvania.  Philadelphia, Pennsylvania 19104
SUBJECT:  Immunomagnet separation assay for M. paratuberculosis. 
OBJECTIVES: Johne's disease is a chronic inflamatory bowel disease of ruminants.  Recent literature has fueled an as-yet unresolved debate about whether this organism is also the etiological agent of at least some proportion of Crohn’s's Disease in humans.  Detection of the organism in stool is difficult due to the slow growth and fastidious nature of M. para, hampering many of the studies of its pathogenesis and interfering with eradication efforts in cattle.  PCR-based detection of M para is highly specific due to the presence of a unique sequence (IS900) but extensive sample preparation and PCR inhibitors in stool limit the sensitivity and utility of the method.  The present proposal focuses on development of antibody reagents to be used in immunocapture of M. para. Immunomagnetic separation (IMS) methods will be developed and tested and alternate solid phase immunocapture methods will be developed.  It is expected that such methods can be integrated into the well-established PCR detection to improve the sensitivity and throughput to accommodate the growing number and types of samples currently being studied.
APPROACH: Development, evaluation and selection of antibodies recognizing surface structures on M. paratuberculosis and suitable for immunocapture of organisms as whole cell antibodies and antibodies specific for LAM, a362 and p35 antigens.  Development of immunomagnetic separation (IMS) reagents and methods for separation of M. paratuberculosis from stool samples, tissue samples and other matrices (e.g., milk or water concentrates).  Development of alternative solid phase immunocapture methods designed to improve sample processing throughput.  Test immunocapture method in conjunction with PCR-detection of enhancement of PCR sensitivity and streamlining of overall process.

 

PROJ TYPE: STATE PROJ STATUS: NEW
START: 01 JAN 2005 TERM: 31 DEC 2006 FY: 2005
INVESTIGATOR: Sweeney, R.
PERFORMING INSTITUTION: School of Veterinary Medicine.  Univ of Pennsylvania.  Philadelphia, Pennsylvania 19104
SUBJECT:  Oral vaccination for Johne's disease in cattle.
NON-TECHNICAL SUMMARY: Johne's disease is widespread, costly and incurable in cattle.  An effective oral vaccine will significantly enhance efforts to eliminate Johne's disease from infected herds.
OBJECTIVES: Johne's disease is a widespread, costly incurable, intestinal infection of cattle caused by Mycobacterium paratuberculosis.  Currently available subcutaneous vaccination does not prevent infection of vaccinated cattle.  The goal of this project is to develop an oral faccination protocol that will stimulate mucosal immunity and prevent intestinal cononization of cattle with M. paratuberculosis.  The influence of vaccine dose, boostering and use of cytokine as a mucosal adjuvant will be measured. Intestinal immune responses will be tested.  Once the optimal combination of dose, adjuvant and boostering is determined, the ability of the oral vaccine to protect against intestinal colonization will be tested using a short-term experimental infection model. APPROACH: Johne's disease is a costly, progressive and ultimately fatal infection of cattle and other ruminants.  Currently available parenteral vaccines do not prevent colonization of the intestines with Mycobacterium paratuberculosis.  Thus, vaccinated cattle may become infected and shed the organism in feces, representing a continued source of environmental contamination and infection for other susceptible animals.  The hypothesis we propose to test follows: oral vaccination, by stimulating a protective immune response at the point of entry of the infection, represents the greatest promise for an effective vaccine against paratuberculosis.

 

PROJ TYPE: HATCH PROJ STATUS: NEW
START: 01 JUL 2006 TERM: 30 JUN 2011
INVESTIGATOR: Fitts, M. G.
PERFORMING INSTITUTION: Livestock-Poultry Health.  Clemson University.  Clemson, South Carolina 29634
SUBJECT:  Metabolic profiling of microbes of economic and animal health significance.
NON-TECHNICAL SUMMARY: Mycobacterium avium subsp. paratuberculosis is the causative agent of Johne's disease and a suspect agent in Crohn’s's disease. Some estimates have the economic loss to the US cattle industry due to Johne's disease at $1.5 billion annually.  Pseudomonas aeruginosa is a problematic microbe capable of causing diseases in plants, animals and humans.  It is almost ubiquitous in nature, residing in water and soil.  It is also a model organism for biofilm formation, a process that renders it highly resistant to antibiotics (for infections of artificial implants or chronic infection of the lung) or cleaning agents (for fouling of industrial equipment).  It is hoped that this work will identify factors vital to the growth and survival of Pseudomonas aeruginosa and Mycobacterium avium subsp. paratuberculosis.  These findings may then be exploited in more applied research in an attempt to manage, treat and/or diagnose infections caused by these organisms.
OBJECTIVES: Metabolic profiling is the identification of the small molecule components of a cell and has diverse applications in drug discovery, clinical diagnostics, biomarker discovery and plant and animal biochemistry.  For microbes the metabolome is a measure of an organism’s response to its environment over time and reflects the overall condition of the culture.  I intend to explore the small molecule repertoire of the clinically significant microbes Mycobacterium avium subsp. paratuberculosis (MAP) and Pseudomonas aeruginosa.  Using reference strains and clinical isolates from our laboratory, I intend to identify unique and relative changes in small molecule production under a variety of culture conditions.  It is hoped that the basic research described in this grant proposal will identify factors vital to the growth and survival of P. aeruginosa and MAP.  These findings may then be exploited in more applied research in an attempt to manage, treat and/or diagnose infections caused by these organisms.
APPROACH: In-house and reference strain microbes are cultured on select solid media either alone or co-cultured with another microbe of interest and harvested at different time intervals.  Bacterial suspensions are heated and bacterial debris removed by centrifugation.  The resulting supernatant is applied to a size exclusion column to collect a fraction containing molecules less than 3,000 daltons.  These extracts are applied to a liquid chromatography - mass spectrometer (LC-MS) to identify small molecules of interest.  Selected molecules that cannot be matched to any libraries will be submitted to the University of South Carolina NMR facility for structural determinations.  Once these molecules are identified by NMR, we will attempt to determine their role in the survival and/or virulence of these strains in addition to determining if they have any diagnostic value.
PROJECT CONTACT:
     Name: Fitts, M. G.  Phone: 803-788-2260  Fax: 803-699-8910
     E
mail:
mfitts@clemson.edu

 

PROJ TYPE: HATCH PROJ STATUS: TERMINATED
START: 01 JAN 2000 TERM: 30 SEP 2002 FY: 2001
INVESTIGATOR: Christopher-Hennings, J.; Nelson, E. A.; Epperson, W.; Chase, C. C.; Henning, D.
PERFORMING INSTITUTION: Veterinary Science.  South Dakota State University.  Brookings, South Dakota 57007
SUBJECT:  Johne's disease in cattle and buffalo (bison): a South Dakota concern.
NON-TECHNICAL SUMMARY: Diagnosis of Johne's disease is difficult since current serology, culture and PCR techniques are not adequate in identifying subclinical carriers.  We propose to develop a sensitive, rapid, high-throughput PCR for detection and quantitation of Mycobacterium paratuberculosis in cattle, buffalo and colostrum and milk products for human consumption and describe the pathogenesis in young cattle.
OBJECTIVES: 1. Develop a sensitive, rapid, high-throughput, molecular diagnostic polymerase chain reaction (PCR) technique for the detection and quantitation of Mycobacterium paratuberculosis in dairy and beef cattle, buffalo and products such as colostrum and milk for human consumption.  2. Describe the distribution and quantity of Mycobacterium paratuberculosis in young cattle, which are the primary subclinical carriers of the organism, to identify the tissue site or secretion which most consistently and reliably could be used for Johne's Disease diagnosis.  APPROACH: Diagnosis of Johne's Disease is difficult since the organism may be shed intermittently in feces and may take 16 weeks to grow in culture.  Also, serology may detect less than half the infected animals, since antibodies develop late after infection.  Recently, voluntary Johne's Certification Programs have been established using the antibody test in combination with culturing of the organism to attempt eradication of this disease.  However, due to poor test sensitivity and prolonged culturing time, this is difficult.  As an alternative to culturing the organism or detecting antibodies to M. paratuberculosis, PCR tests which can detect very small amounts of the organisms DNA have been developed.  We are currently using a PCR test for the detection Johne's Disease.  However, the conventional PCR tests are very laborious, not easily used for quantitation and only a small number of samples can be tested at one time.  An automated, rapid, high-throughput PCR test using fluorescent probes called molecular beacons may provide a better diagnostic test.  A 96-well plate can be used allowing for more samples to be tested at one time.  Also, the system is automated using computer software for fluorescent detection and is not as labor intensive.  The ''bacterial load' or quantity can also be evaluated, providing information on which tissue site or secretion contains the highest numbers of bacteria.  This would provide information on which specimen would be most useful for submission to the diagnostic laboratory for the detection of the organism.  It would also identify animals, which may be shedding large numbers of the bacteria, allowing for better culling decisions.  To evaluate this automated PCR procedure, the sensitivity and specificity of the test will be obtained by comparisons with culturing which is considered the gold standard.  A study involving 3-week old calves will be performed since these are the primary subclinical carriers of the disease.  The calves will be inoculated with M. paratuberculosis, then serum, white blood cells, feces and tissue specimens will be collected and evaluated.  This study will determine which specimen contains the highest numbers of M. paratuberculosis and would be the most valuable for submissions for organism identification.  Fourteen to 18 month old beef calves will also be evaluated at slaughter.  Tissues from these beef calves will be collected and compared to antibody test levels in the herd to determine whether slaughter check testing may be more valuable in the Johne's-free certification program than antibody testing.  A third study evaluating fecal specimens from a Johne's positive buffalo herd will be obtained to determine the usefulness of an automated, quantitative PCR procedure in diagnosing Johne's Disease carriers in buffalo.  Finally, milk and colostrum samples from a private company in South Dakota will be evaluated by automated PCR to determine the best method of extracting M. paratuberculosis DNA from milk and colostrum and whether automated PCR can be used to screen milk samples for M. paratuberculosis before and after commercial pasteurization.
PROGRESS: 2000/01 TO 2002/09  Johne's Disease is a chronic, wasting disease of ruminants with significant economic importance due to lowered milk production and shorter life expectancy.  It is also a public health concern due to its possible association with Crohn’s's Disease in people.  Through this funded research, an automated, quantitative polymerase chain reaction (PCR) assay for the detection of Mycobacterium paratuberculosis from bovine feces was developed.  This assay can be used directly on bovine feces and had a sensitivity of 93-96% and specificity of 92% when compared with fecal culture, which is considered the gold standard.  Results were quantitated by using a standard curve derived from a plasmid containing the IS900 gene sequence.  A minimum quantity of 1.7 X10-4 picograms of DNA, correlating to 1-8 CFU was detected by this assay.  The quantitative PCR was then utilized in a study using calves experimentally inoculated with M. paratuberculosis to determine whether the bacteria can be detected during the early stages of infection.  Results from 9 calves indicated only minimal tissue samples harbor the organism during the first 9 months of infection and included either lymphoid tissues (eg. hepatic lymph node, ileal-cecal lymph node or thymus) or intestinal tissue (eg. ileal cecal fold and cecum).  Feces, whole blood and serum samples collected from these calves did not indicate infection with M. paratuberculosis.  Therefore, it was concluded that the dormancy and lack of dissemination of the organism early in infection prevents adequate detection of the organism diagnostically.  In a second part of the study, when M. paratuberculosis 'spiked' colostrum samples were utilized, it was determined that the real-time, quantitative PCR procedure could detect the organism in this sample.  Using post parturient cows, Mycobacterium paratuberculosis was detected within feces using real-time PCR, but colostrum samples did not harbor the organism in these non-clinically affected cows.  Thirdly, evaluation of a new commercial PCR assay was performed by comparing this assay with culture results from 63 'Johne's proficiency' tests provided by the National Veterinary Services Laboratory and with the real-time PCR assay.  Results indicated that the DNA extraction procedure is critical in the detection of M. paratuberculosis directly from bovine or bison feces.  Combining 2 different extraction techniques with 3 different PCR assays provided statistically similar sensitivities equal to culturing the bacteria from feces.  These methods included the commercial extraction combined with nested PCR, the commercial PCR/Southern blot, or real-time PCR; or a university-developed extraction using real-time PCR.  It was concluded that either of these methods would be valid alternatives to culture, thus significantly decreasing the time for the detection of the organism, since culturing may take up to 16 weeks for definitive results.
IMPACT: 2000/01 TO 2002/09  The impact of this research has been to provide valuable information to veterinary diagnostic laboratories using these PCR assays and culture to detect M. paratuberculosis.  The development of the real-time PCR demonstrated that the sensitivity of the assay is statistically equal to that of culture, which will lessen the amount of time necessary for detection.  It also provides the basis for further pathogenesis studies of Johne's Disease by allowing for quantitation and rapid detection of the organism.  The time required for detection of the bacteria has been decreased dramatically with use of the real-time PCR assay and will allow for more rapid detection of Johne's infected animals which will assist in the voluntary Johne's Certification Programs.  This study also determined that the real-time PCR will detect M. paratuberculosis in bison, which will be useful in establishing Johne's-free bison herds.
PUBLICATIONS: 2000/01 TO 2002/09
1. Christopher-Hennings J., M. A. Dammen, S. R. Weeks, W. B. Epperson, S. N. Singh, G. L. Steinlicht, Y. Fang, J. L. Skaare, J. L. Larsen, J. B. Payeur, E. A. Nelson. 2003. Comparison of two DNA extractions and nested PCR, real-time PCR, a new commercial PCR assay and bacterial culture for detection of Mycobacterium avium subsp. paratuberculosis in bovine feces. J. Vet. Diagn. Invest. 15:000-000. (in press)
2. Fang Y., W-H Wu, J. L. Pepper, J. L. Larsen, S. A. E. Marras, E. A. Nelson, W. B. Epperson, J. Christopher-Hennings. 2002. Comparison of real-time, quantitative PCR with molecular beacons to nested PCR and culture methods for detection of Mycobacterium avium subsp. paratuberculosis in bovine fecal samples. J. Clin. Microbiol. 40:287-291.
3. Skaare J., Y. Fang, M. Dammen, S. Weeks, W. Epperson, S. Singh, G. Steinlicht, J. Larsen, J. Payeur, E. Nelson, J. Christopher-Hennings. 2002. Comparison of two DNA extractions and nested PCR, real-time PCR, a new commercial PCR assay and bacterial culture for detection of Mycobacterium avium sbsp. paratuberculosis in bovine feces.  American Association of Veterinary Laboratory Diagnosticians, St. Louis, MO.
4. Wu W.-H., Y. Fang, J. Larsen, E. Nelson, J. Christopher-Hennings. 2000. Molecular Beacons: a new approach for detecting Mycobacterium paratuberculosis in bovine fecal samples. Conference for Research Workers in Animal Diseases. Chicago, IL.
PROJECT CONTACT:
     Name: Christopher-Hennings, J.  Phone: 605-688-5171  Fax: 605-688-6003
     E
mail:
Jane_Christopher-Hennings@sdstate.edu

 

PROJ TYPE: HATCH PROJ STATUS: NEW
START: 01 OCT 2003 TERM: 30 SEP 2008 FY: 2005
INVESTIGATOR: Speer, C. A.
PERFORMING INSTITUTION: Forestry Fisheries & Wildlife.  University of Tennessee.  569 Dabne Hall.  Knoxville, Tennessee 37996
SUBJECT:  Development of an early diagnostic test for Johne's disease in cattle.
NON-TECHNICAL SUMMARY: Johne's disease affects numerous ruminants (including cattle) in which it is characterized as a chronic wasting disease.  Losses are estimated at $250 million annually in the U.S. alone. Johne's disease is inordinately difficult to diagnose.  The purpose of this project is to develop a specific and sensitive monoclonal antibody-based test for Johne's disease.  Project contact: C.A. Speer
OBJECTIVES: 1. Generate monoclonal antibodies against the Ag85a complex of Mycobacterium avium paratuberculosis.  2. Compare the sensitivity and specificity of the Ag85a antibody test with the ELISA and the fecal culture tests for the detection M. a. paratuberculosis. 3. Establish a serum bank of M. a. paratuberculosis-positive and negative cattle
APPROACH: Generate monoclonal antibodies against Ag85a peptides and then test for reactivity and specificity against Ag85a from M. a. paratuberculosis in sera of infected cattle.
PROGRESS: 2005/01 TO 2005/12 Mycobacterium avium subsp. paratuberculosis (MAP) is the etiologic agent of Johne's disesase (JD), which occurs worldwide affecting many domestic and wild animals including cattle, sheep and many other ruminants.  Infections with MAP often lead to chronic granulomatous enteritis with clinical signs of diarrhea, weight loss, decreased milk production and mortality.  To date, there are no effective diagnostic tests, chemotherapeutics or vaccines for JD.  Until now, the fecal culture test with a sensitivity level of 38% was considered the best diagnostic test for JD and no JD diagnostic test is capable of detecting prepatent MAP infections.  We have developed a flow cytometric method (FCM) for the diagnosis of JD in cattle that has diagnostic sensitivity and specificity levels of 95.2% and 96.7%, respectively.  Compared to the fecal culture test and commercially available ELISA tests, the FCM detected MAP infections 6-44 months earlier than the fecal culture test and 17-67 months earlier than a commercial ELISA.  Recently, by using information gleaned from the FCM, we converted the FCM test to an ELISA format that has diagnostic specificity and sensitivity rates equal to that of the FCM.  Our ELISA for JD is also capable of detecting early, prepatent MAP infections.
IMPACT: 2005/01 TO 2005/12  Johne's disease costs the U.S. agricultural industry approximately $1.5 billion annually including a $200 million loss to the U.S. dairy industry.  We have developed a novel flow cytometric assay and ELISA for the early and sensitive diagnosis of MAP-infected cattle.  The tests are objective, subspecies-specific, highly sensitive, quantitative, rapid, can be performed on small samples, and can detect JD by analysis of milk and serum samples.  This test will be used to eliminate Johne's disease infected beef and dairy herds.
PUBLICATIONS: 2005/01 TO 2005/12
Eda, S., B. Elliott, M.D. Scott, W.R. Waters, J.P. Bannantine, R.H. Whitlock, and C.A. Speer. 2005. New method of serological testing for Mycobacterium aviuim subsp. paratuberculosis (Johne's disease) by flow cytometry. Foodborne Path. Dis. 2:250-262.

 

PROJ TYPE: HATCH PROJ STATUS: REVISED
START: 15 JUL 2004 TERM: 14 JUL 2009 FY: 2005
INVESTIGATOR: Adams, L. G.; Ficht, T. A.; Ficht, A. R.; Womack, J. E.; Thomas, T. L.; Baumler, A. J.; Tsolis, R. M.; Zhu, G.; Clarke, N. P.; Walker, D. H.; Peters, C. J.; Yilma, T.
PERFORMING INSTITUTION: Veterinary Pathobiology.  Texas A&M Univ.  College Station, Texas 77843
SUBJECT:  Molecular pathogenesis of emerging & zoonotic intracellular pathogens of ruminants as the basis for improved diagnosis and vaccination.
NON-TECHNICAL SUMMARY: This will provide deterrents to biological warfare through innate resistant cattle, biosignatures for diagnostics, and improved vaccines.  The outcomes from these projects have application for improving public health, producing safer foods and minimizing agricultural and human bioterrorism.
OBJECTIVES: The specific objectives of our research program project are to: 1. Establish the in vitro and in vivo patterns of temporal gene expression by massively parallel signature sequencing and macro- and microarray analysis of Salmonella enterica Typhimurium, Brucella abortus, Cryptosporidium parvum, and Mycobacterium avium subspecies paratuberculosis infected target tissue culture cells and intact bovine ileum.  2. Apply bioinformatics and computational biology to compare the temporal gene profiles for common and unique expression patterns for Salmonella enterica Typhimurium, Brucella abortus, Cryptosporidium parvum, and Mycobacterium avium subspecies paratuberculosis.  3. Confirm selected common and uniquely expressed genes by real-time PCR, Northern analysis, RNAse protection and/or RNA interference assays and define the roles of candidate genes in major cell physiological pathways critical to survival of the pathogen or the host.  4. Sequence host genes essential for survival of each pathogen in nuclear families of cattle segregating differential response to pathogens and identify single nucleotide polymorphisms (SNPs). APPROACH: Because the central theme of all investigators on this team hinges on the availability of specimens from the host:pathogen interface, DNA microarray analysis, and bovine genomic analysis, we will further strengthen shared core laboratories to meet the requirements of the individual research projects as described below.  Ruminant Ileal Loop Core Laboratory: For the in vivo genomic comparative analysis of ruminant host responses to the selected intracellular pathogens, the initial focal point of all investigators is at the level of the host:pathogen entry interface and subsequent interactions in Peyers patches.  Samples for bacteriologic culture, histopathology and ultrastructural studies are collected as required for the specific pathogens, for example at 5, 15, and 30 minutes and 1, 2, 3, 4, 5, 6, 8, 10, and 12 hours.  For gene expression analysis, total RNA is extracted immediately after dissection of the mucosa from samples obtained at specified time intervals post-infection. Microarray & Informatics Core Laboratory:  We will use a commercial bovine microarray to study the differential expression of bovine genes in response to the microbial infections, bacterial and protozoal pathogens will be inoculated into bovine ligated ileal loops or appropriate cell lines.  Total RNA will be isolated from infected and control bovine tissues or cells using appropriate RNA isolation kits and mRNA may be further purified from the total RNA to increase the ratio of under-representative transcripts that include many regulatory or defensive genes critical to the host-pathogen interaction.  Hybridization is detected using cDNA probes synthesized with one of two color fluorescent deoxyribonucleotide precursors.  The intensities of hybridization in microarrays will be quantified and analyzed using a GeneSight software.  Using microarray techniques and ratio analysis, we expect to identify bovine genes whose expression levels are strongly regulated by the invasion of microbial pathogens for future confirmation by real-time PCR.  Analysis of Genes in Radiation Hybrid Cell Lines: The development of a 5000 rad radiation hybrid (RH) panel for cattle genome mapping ushered in high-resolution comparative mapping of the cattle genome relative to the genomes of human and mice.  Two-point linkage and multipoint map construction will be carried out with the RHMAPPER package.  The most likely order will be subjected to a multipoint maximum likelihood algorithm to determine breakage frequency and cR distances.
PROGRESS: 2005/01 TO 2005/12  Molecular Basis of Disease Processes. Gene expression analyses for both cattle and select agents has been implemented to expand the knowledge base using bioinformatic and computational biologic analyses to identify host biosignature gene expression and biomarker patterns that will be explored as rationales for rapid diagnostics and improved vaccines.  Diagnostics: FMDV, RVFV and AI and Brucella abortus diagnostic assays were developed, implemented and are being evaluated for specificity and sensitivity on samples of known status.  Antigens for ELISA-based diagnostic tests for FMD, RVF, BRU, and AI are being developed under BSL-2 conditions for antigen expression systems for direct application in currently robotics systems as well as lateral flow immunoassays (LFIA).  Biomarker candidates for brucellosis for have been identified using banked sera from infected and control cattle.  A functional LFIA has been implemented which distinguishes high pathogenicity H5N1 from low pathogenicity H7N1 AIV strains.  Vaccines: Candidate vaccines are being constructed through site-directed or transposon mutagenesis and/or antigen expression in alphavirus replicons or vacciniapoxvirus systems for testing protective immunity against RVF, BRU and AI.  These vaccines are being screened through in vitro target host cell culture systems, followed by evaluation for in vivo safety, immunogenicity and protection in laboratory animals and ruminants.  Innate Disease Resistance: Candidate resistance genes against FMD, RVF and brucrllosis, including Toll-Like Receptor (TLR) and Nucleotide Oligomerization Domain (NOD) genes, have been mapped to their specific location on cattle chromosomes and partially sequenced.  Identification of RVFV resistance genes in rats are being pursued as a homolog for ruminants, attempts are made for re-derivation of frozen rat embryos.  IMPACT: 2005/01 TO 2005/12  Specific deliverable products that address the priority areas are targeted including new methods for detection, diagnosis, and immunization, as well as better understanding of the genetic basis for host-pathogen interactions.  Development and implementation of new technologies and capabilities focused on the four major representative diseases is expected to be provide broad, flexible platforms applicable to emerging diseases and many forms of animal bioterrorism.  The products of related research projects are expected to yield a better understanding of the molecular basis for the disease processes of select agents; improved, more reliable diagnostics; and more rational and innovative development of vaccines that will not compromise internationally standardized diagnostic assays.  The impact of new deliverables to priority areas will serve as input to disease modeling so that the impact of these deliverables can be estimated in the prevention, detection, response and recovery from emerging diseases and agrobioterrorist events.
PUBLICATIONS: 2005/01 TO 2005/12
1. Raffatellu, M., Wilson, P. R., Chessa, D., Andrews-Polymenis, H. L., Tran, Q. T., Lawhon, S., Khare, S., Adams, L. G. and Baeumler, A. J. 2005. SipA, SopA, SopB, SopD and SopE2 contribute to Salmonella enterica serotype Typhimurium invasion of epithelial cells. Infection & Immunity 73:146-154.
2. Tukel, C., Raffatellu, M., Humphries, A. D., Wilson, R. P., Andrews-Polymenis, H., L., Gull, T., Figueiredo, J. F., Wong, M.H., Michelsen, K.S., Akcelik, M., Adams, L. G. and Baeumler, A. J. 2005.  CsgA is a pathogen-associated molecular pattern of Salmonella enterica serotype Typhimurium that is recognized by Toll-like receptor 2. Molecular Microbiology 58:289-304.
3. Gorton, T. S., Barnett, M. M., Gull, T., French, R. A., Lu, Z., Kutish, G. F., Adams, L. G. and Geary, S. J. 2005. Development of real-time diagnostic assays specific for Mycoplasma mycoides subspecies mycoides. Veterinary Microbiology 111:51-58.
4. Raffatellu, M., Sun, Y.H., Watson, R. P., Tran, Q. T., Chessa, D., Andrews-Polymenis, H. L., Lawhon, S. D., Figueiredo, J. F., Tsolis, R. M., Adams, L. G. and Baeumler, A. J. 2005. Host restriction of Salmonella enterica serotype Typhi is not caused by functional alteration of SipA, SopB, or SopD. Infection & Immunity 73:7817-7826.
PROJECT CONTACT:
     Name: Adams, L. G.  Phone: 979-845-9816  Fax: 979-862-1088
     E
mail:
gadams@cvm.tamu.edu

     
URL:
http://www.cvm.tamu.edu/vtpb

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 06 AUG 1998 TERM: 05 AUG 2004 FY: 2005
INVESTIGATOR: Brumbaugh, G. W.
PERFORMING INSTITUTION: Veterinary Physiology & Pharmacology Texas A&M Univ College Station, Texas 77843
SUBJECT:  Physiologic, pathophysiologic, and pharmacologic management of animal health.
NON-TECHNICAL SUMMARY: Management practices to enhance or sustain health of animals become outdated with the introduction of new technology and research findings.  This project will critically and rationally evaluate published information about continued or new animal health issues and application of techniques in order to develop rational management practices or to eliminate irrational practices.
OBJECTIVES: To enhance or sustain health of animals by targeted management based on understanding, physiologic or pathophysiologic processes associated with disease and pharmacologic mechanisms of treatments.
APPROACH: Critical and rational evaluation of published information about continued or new animal health issues and application of techniques to evaluate processes involved in order to develop rational management practices or to eliminate irrational practices.
PROGRESS: 1998/08 TO 2004/08  The susceptibility in vitro of Mycobacterium avium sbsp. paratuberculosis to monensin sodium and to tilmicosin phosphate were evaluated.  Subsequent to exposure to those compounds, the infectivitiy of the organism in vivo was evaluated using a murine model.  This project contributed to the knowledge base about the organism's response to two chemical agents that may be evaluated as part of the control of cattle with bovine paratuberculosis, globally.
IMPACT: 1998/08 TO 2004/08  The two compounds evaluated are commonly used in cattle around the world for other indications.  Bovine paratuberculosis is a globally recognized disease for which there is no treatment and for which control measures are customized.  With results of this study, studies with diseased cattle should be conducted next to evaluate the role of these compounds for the control of this disease.
PUBLICATIONS: 1998/08 TO 2004/08 
Brumbaugh GW. Simpson RB, Edwards JF, Anders DR, Thomson TD. 2003. Susceptibility of Mycobacterium avium sbsp. paratuberculosis to monensin sodium or tilmicosin phosphate in vitro and resultant infectivity in a murine model. (Accepted for publication, 2004, Canadian Journal of Veterinary Research)
PROJECT CONTACT:
     Name: Brumbaugh, G. W.  Phone: 979-845-7257.  Fax: 979-845-6544
     E
mail:
gbrumbaugh@cvm.tamu.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: TERMINATED
START: 01 FEB 2001 TERM: 30 SEP 2003 FY: 2003
INVESTIGATOR: Ficht, T. A.; Adams, L. G.; Ficht, A. R.
PERFORMING INSTITUTION: Veterinary Pathobiology.  Texas A&M Univ.  College Station, Texas 77843
SUBJECT:  Host-agent interaction and molecular typing of Mycobacterium avium subst. [sic] paratuberculosis.
NON-TECHNICAL SUMMARY: Gene expression in host (mammalian) cells will be monitored following exposure to Mycobacterium avium subsp. paratuberculosis the causative agent of Johne's disease.  Activated gene expression in response to the infectious agent will provide insight to the mechanism of disease and possible provide diagnostic reagents used to identify infected animals.  Genetic markers within the agent itself are also sought in an attempt to identify host and virulence specific activities.
OBJECTIVES: (1) Evaluate Host Gene Expression in Response to Map Tb Infection (2) Molecular Fingerprinting of Map Tb Isolates.
APPROACH: The close relationship between Mycobacterium avium subsp. avium (MapTB) and M. avium subsp. avium (M. Avium) has complicated diagnosis, yet these organisms have completely different outcomes in ruminant infection.  The work proposed is designed to take advantage of these differences by comparing the interaction of both organisms with the bovine gut.  To this end, we will compare gene expression in host cells, in response to infection with MapTB and M. avium.  Gene expression will be evaluated in vitro in macrophages and in ileal Peyer's patches (IPP) of ligated loops and mesenteric lymph nodes (MLN).  Variation among Map Tb isolates has been described for surface antigens, virulence, and hose range.  Sheep and bovine isolates exhibit variation that my reflect preferences for a particular host or changes in response to a host.  The ability to identify markers for each of these variables is the first step in identifying the genes responsible for infection or persistence in a particular host.  We propose the use of AFLP (amplified fragment length polymorphisms) to characterize the genetic diversity among Map Tb isolates.
PROGRESS: 2001/02 TO 2003/09  AFLP (amplified fragment polymorphism) has been employed to compare Mycobacterium avium subsp. avium (M. avium) and Mycobacterium avium subsp paratuberculosis (MparaTb) for genetic differences that may be used as diagnostic probes that vary between or within subspecies.  Ninety-six AFLP primer sets have been employed to characterize 20 MparaTb field isolates, one ATCC MparaTb isolate (ATCC 19698), and two M. avium isolates (ATCC 35716 and Mac 104).  Specifically, 16 MseI primers bearing selective dinucleotides at the 3?end were used in combination with PstI primers also bearing 3? selective dinucleotides.  Using specific primer sets, diagnostic patterns have been established for the identification of MparaTb isolates when compared with the ATCC strain of M. avium or with a field isolate of M. avium (Mac 104).  Four AFLP fragments unique to the MparaTb genome have been cloned and sequenced. Primers were generated within these regions and all MparaTb isolates used in this study produced an appropriate PCR product for at least two of the four primer sets developed.  The M. avium isolates failed to act as templates for all of these primer sets.  This work also revealed the presence of polymorphisms in the genome of MparaTb and this data provides a sound foundation for the use of a multiplex diagnostic PCR for to detect MparaTb isolates.  Among the MparaTb specific sequences one revealed a 5,145bp region missing from the M. avium genome that has sequence homology to genes responsible for integrase/recombinase function.  Additional MparaTb-specific AFLP bands have been cloned and are being tested for their diagnostic and epidemiological value.  A variety of signals may initiate the intestinal response to MapTb infection, including the transient expression of chemokine genes.  In calf-ileal loop experiments, real time PCR was used to determine cytokine expression levels.  The results were normalized to a target mRNA, GAPDH, and expressed 2-ddCT.  A 14-fold stimulation of GRO a transcription (4 hr) and a 12-fold increase in GRO g transcription (8 hr) relative to GADPH was observed.  There were increases in the transcription of GCP1 (4-fold) and GCP2 (6-fold). MCP1 (6-fold) and MCP2 (11-fold) transcription reached an optimum at 4 hours post infection.  These were accompanied by the expected stimulation of IL1beta (14-fold) transcription.  Expression of GRO may be under the control of IL-1 and/or TNF.  Our results suggest involvement of IL-1 on GRO expression.  These results support the contention that differential activation of granulocyte and monocyte chemotactic cytokines may play a major role in the pathogenesis of Maptb infection.  It will be interesting to compare these results with that obtained using the closely related organism M. avium.
IMPACT: 2001/02 TO 2003/09  MparaTB isolates will be fingerprinted in an effort to epidemiologically track outbreaks of infection. Differences between M avium and MparaTB may be used to identify gene functions controlling virulence and host range.
PUBLICATIONS: 2001/02 TO 2003/09
1. O’Shea, B., et al., Genotyping and Characterization of Mycobacterium avium subsp. paratuberculosis using amplified fragment length polymorphism for the use as a diagnostic tool. 2003.
2. Khare, S., et al., Rapid and sensitive detection of Mycobacterium avium subsp.  paratuberculosis in bovine and American bison milk and fecal samples by an immunomagnetic bead real-time PCR. Infection and Immunity, 2002. Submitted for publication.
PROJECT CONTACT:
     Name: Ficht, T. A.  Phone: 979-845-4118.  Fax: 979-862-1088
     E
mail:
tficht@cvm.tamu.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2005-35204-16087 PROPOSAL NO: 2005-01639 START: 01 SEP 2005 TERM: 31 AUG 2008 FY: 2005 GRANT YR: 2005 GRANT AMT: $314,984
INVESTIGATOR: Fosgate, G. T.; Norby, B.; Ward, M. P.; Gayle, L.; Ellis, D.
PERFORMING INSTITUTION: Veterinary Integrative Biosciences.  Texas A&M Univ.  College Station, Texas 77843
SUBJECT:  Foreign animal disease surveillance systems for the future: evaluation of methods for data acquisition and analysis.
NON-TECHNICAL SUMMARY: The intentional or accidental introduction of a foreign animal disease poses a great risk to the animal agriculture industry of the United States.  The purpose of this project is to determine the most effective surveillance system for foreign animal diseases of cattle by creating a network of veterinary practitioners and its comparison to other survey techniques. OBJECTIVES: 1. Create a veterinary practitioner network dedicated to the surveillance of foreign animal diseases.  The working hypothesis for this research objective is that private veterinary practitioners are the first line of defense to prevent the incursion of an FAD from becoming an uncontrolled epidemic.  The skills and expertise of practicing veterinarians are not being exploited for active surveillance of FADs.  A skilled network of practicing veterinarians will improve our ability to detect FADs and protect U.S. agriculture.  2. Determine the effectiveness of three active surveillance techniques for detection of foreign animal diseases by using currently endemic cattle pathogens that mimic the epidemiology, pathogenicity, and virulence of FADs.  The working hypothesis for this research objective is that active surveillance strategies using specimens that are currently collected for other disease programs are an equally sensitive method for detecting low prevalence, low morbidity diseases as more comprehensive, and expensive, survey methods.  It is hypothesized that current brucellosis surveillance programs could be modified to include testing for select agents determined to be of high consequence to U.S. agriculture and public health.  It is further hypothesized that active surveillance of clinically ill cattle (targeted) is necessary for the rapid detection of diseases that are more virulent with higher morbidity proportions.  Using endemic cattle diseases that mimic FADs is necessary for the development of future FAD surveillance programs in the absence of actual outbreaks.  3. Develop a decision support system for the initiation of a foreign animal disease (FAD) investigation based on spatiotemporal clustering of results from an imperfect screening test.  The working hypothesis for this research objective is that intensive surveillance programs for FADs using tests with imperfect diagnostic specificity will lead to the unnecessary investigation of false-positive test results unless the appropriate decision tools are developed.  It is hypothesized that all screening tests will have some proportion of false-positive results and mechanisms can be developed to account for background levels of spatiotemporal clustering of these results to prevent unnecessary and costly FAD investigations including quarantines and hold orders.  Developing these mechanisms is necessary for the design and implementation of future surveillance systems.
APPROACH: A practitioner network has been formed based on the American Veterinary Medicine Association (AVMA) member directory.  A brief mailing was performed describing the objectives of the current proposal and included a postcard for the veterinarian to return stating his or her interest level in participating in this type of study.  Educational materials will be developed concerning foreign animal disease diagnosis and surveillance and distributed to the veterinarians participating in this network in addition to currently available materials such as the CD version of the Grey Book available from the United States Animal Health Association (USAHA).  A monthly newsletter will be created including a disease of the month feature spotlighting pertinent pathological and epidemiological characteristics of different foreign animal diseases.  The newsletter will also contain updates concerning the research activities including the number of samples submitted and disease prevalences.  Practitioners enrolled as part of the surveillance network will be requested to submit serum samples from cattle with illnesses that cannot be definitively diagnosed based exclusively on physical exam findings.  Practitioners will be asked to submit serum and data from 2 cattle per month over a 2-year sample collection period.  A random sample of serum specimens submitted to the State-Federal Laboratory in Austin, Texas will be selected for inclusion in the research project.  A non-probability sample of Texas cattle will also be evaluated as part of this research project to compare to the other methods of active surveillance.  These cattle were sampled in a manner proportional to the overall cattle distribution throughout Texas.  The total number of serum samples tested over the 2-year period will be 1000 for each surveillance system.  Submitted samples will be tested for select infectious agents including Paratuberculosis, Bovine Leukemia Virus, Bovine Virus Diarrhea, and West Nile Virus.  The owner may also choose not to view the results in which case only the researchers directly involved with the study will ever know the disease status of the sampled animals. Statistical simulation models will be developed and used as a decision support system to identify disease clusters caused by the introduction of a foreign animal disease.  Spatiotemporal scan statistical methods are often used for these types of problems.  These models can also be adjusted for covariates to account for a non-random distribution of cases through time and space (non-uniform baseline risks).  The surveillance for FADs will necessitate modeling the baseline risk of a false-positive test result, rather than the baseline level of disease.  Statistically significant clusters found after adjusting for the covariate-adjusted risk of false-positives will be identified as clusters. Covariates that may be important for modeling false-positive reactions include cattle type (beef versus diary) and ecological factors such as climate, which may be associated with presence of cross-reacting organisms.
PROJECT CONTACT:
     Name: Fosgate, G. T.  Phone: 979-845-3203.  Fax: 979-847-8981
     E
mail:
gfosgate@cvm.tamu.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT PROJ STATUS: EXTENDED
CONTRACT/GRANT/AGREEMENT NO: 2002-35204-12634 PROPOSAL NO: 2002-02212
START: 01 SEP 2002 TERM: 31 AUG 2005 GRANT YR: 2002 GRANT AMT: $249,000
INVESTIGATOR: Ficht, A. R.; Ficht, T. A.; Adams, G. L.
PERFORMING INSTITUTION: Texas A&M University System Health Sci Ctr.  407 Reynolds Medical Bldg. College Station, Texas 77843
SUBJECT:  Genetic diversity applied to the diagnosis and epidemiology of Mycobacterium avium paratuberculosis.
NON-TECHNICAL SUMMARY: Johne's disease ('paratuberculosis') is a chronic, infectious, wasting disease with significant impact on herd productivity resulting in a corresponding economic loss to U.S. dairy operations.  According to the USDA National Animal Health Monitoring System's (NAHMS) 1996 national dairy study, Johne's-positive herds experience an economic loss of almost $100-200 per cow resulting from reduced milk production and increased cow-replacement costs.  When averaged across all herds, Johne's disease costs the US dairy industry $200-250 million annually in reduced productivity.  The experiments described are designed to enhance early detection of Johne's disease and to correctly identify and track virulent isolates.  We have developed a sensitive detection method for Johne's disease organisms which employs magnetic bead recovery of organisms from cattle milk or fecal samples.  We are also utilizing a newly developed genetic approach, Amplified Restriction Fragment Polymorphism (AFLP) in combination with bioinformatics to develop new tools for tracking individual and herd isolates of Johne's organisms. Research here will provide new tools for diagnosis and control of subclinical infection and permit the elimination of infected animals before the organism has a chance to spread within herds. OBJECTIVES: Characterize the extent of genetic diversity among and between M. avium avium (M. avium) and M. avium paratuberculosis (MapTB) isolates using amplified fragment length polymorphism (AFLP).  Characterize specific genetic differences by isolation and sequence analysis of AFLP fragments.  Utilize diversity data to develop PCR primers for diagnostics and epidemiology.  
APPROACH: AFLP, a relatively new experimental approach, will be used to reveal polymorphisms useful in cataloging the genetic diversity of of MapTB clinical isolates from Central and North America.  This approach will also be used in subdividing and tracking clinical isolates of MapTB. AFLP will first be used to establish relationships among MapTB isolates and between MapTB and nonpathogenic M. avium.  Secondly, AFLP fragments unique to MapTB will be isolated and sequenced and the sequences compared to that of M. avium. PCR primers capable of specifically detecting MapTB isolates will be derived from this data and used in diagnostic and epidemiological analysis.
PROGRESS: 2002/09 TO 2003/08  One hundred ninety two AFLP primer sets have been employed to characterize 20 Mycobacterium avium subspecies paratuberculosis (MparaTb) field isolates, one ATCC MparaTb isolate (ATCC 19698), and two M. avium avium isolates (ATCC 35716 and Mac 104) totaling 4,416 independent PCR reactions.  Specifically, 16 MseI primer sets bearing selective dinucleotides at the 3'end were used in combination with 12 PstI primers bearing 3' selective dinucleotides.  Diagnostic patterns have been established for the identification of MparaTb isolates and five AFLP fragments unique to the MparaTb genome have been cloned and sequenced.  BLAST search results for these five AFLP fragments reveals sequence homology to genes such as the primosomal protein N' (PPN') of Brucella melitensis, P44k protein of Rhodococcus erythropolis, putative polyketide type 1 synthase (PPKS) of Streptomyces, replication protein of Rhodococcus erythropolis, and one region showed no significant similarity to any known protein.  Primers were generated that were internal to these regions and when applied to the 20 MparaTb field isolates in this study an appropriate PCR product was obtained in 99 of 100 reactions.  The M. avium avium isolates failed to act as templates for PCR amplification in 9 of 10 reactions.  This work revealed the presence of polymorphisms in the genomes of MparaTb and M. avium avium.  In addition to these PCR reactions we also carried out PCR with 4 out of the 5 MparaTb specific primer sets on an NVSL Johne’s test set.  This test set consisted of 25 samples, 17 determined to be MparaTb and 8 were determined to be negative for MparaTb genomic DNA through IS900 PCR and verification from NVSL.  PCR amplification with diagnostic primer sets for regions 1-4 designed in this study were performed on these 25 NVSL isolates.  Region 1 primer set amplified its corresponding region in 15 of 17 MparaTb isolates.  Region 2 primer set amplified its corresponding region in 11 of the 17 MparaTb isolates.  Region 3 primer set amplified its corresponding region in 12 of the 17 MparaTb isolates.  Finally, Region 4 primer set amplified its corresponding region in only 7 of the 17 MparaTb isolates.  One of the 17 MparaTb isolates (#15) showed no amplification with any primer set and none of the MparaTb-specific primer sets described here produced amplification products from the negative samples.  This data suggests that there is a high degree of heterogeneity among these 17 MparaTb isolates and that these polymorphic regions are not conserved in all MparaTb isolates.  Examining one of the MparaTb specific sequences more closely revealed a 5,145bp region with no homolog in the M. avium avium genome.  Within this region are genes responsible for integrase/recombinase function.  An additional MparaTb specific sequence revealed a 15kb region with no homologue in the M. avium avium genome. Both of these missing regions were verified to be absent from the M. avium avium genome through PCR primer walks.  Three additional MparaTb-specific regions have been cloned, revealing a number of house keeping genes; all were evaluated for their diagnostic and epidemiological value.
IMPACT: 2002/09 TO 2003/08  The work we have completed will enable a rapid diagnostic test to be put in place utilizing isolation of organisms from milk or feces followed by PCR.  This test will enable a diagnosis within a matter of days rather than the 6 or more weeks normally required for culture growth and identification.  As we continue to investigate a spectrum of field isolates and analyze them via AFLP, we will identify more DNA targets and additional PCR diagnostic primer sets that will facilitate not only identification of M. paratuberculosis isolates, but epidemiological tracking of organisms.
PUBLICATIONS: 2002/09 TO 2003/08
1. O'Shea, Brian, Khare, Sangeeta, Bliss, Katherine, Klein, Patricia, Ficht, Thomas A., Adams, L. Garry, Rice-Ficht, Allison C. (2003) Genotyping and characterization of Mycobacterium avium subsp. paratuberculosis using amplified fragment length polymorphism (submitted).
2. O'Shea, Brian (2002) International Conference on Emerging Infectious Diseases; Atlanta, Georgia; March 24-27, Genotyping and characterization of Mycobacterium avium paratuberculosis using amplified fragment length polymorphism, 2002.
3. O'Shea, Brian (2002) Genotyping and characterization of Mycobacterium avium subsp. paratuberculosis using amplified fragment length polymorphism for the development of a diagnostic tool, Conference of Research Workers in Animal Diseases, St. Louis, Missouri, November 10-11, 2002.
PROJECT CONTACT:
     Name: Ficht, A. R.  Phone: 979-458-1024  Fax: 979-847-9481
     E
mail:
a-ficht@tamu.edu

 

PROJ TYPE: STATE PROJ STATUS: TERMINATED
START: 01 JUL 2000 TERM: 31 DEC 2003 FY: 2004
INVESTIGATOR: Bingham, H. R.; Bagley, C. V.
PERFORMING INSTITUTION: Animal Dairy & Vet Science.  Utah State University.  Logan, Utah 84322
SUBJECT:  Seroprevalence of Mycobacterium avium subspecies paratuberculosis in Utah cull dairy and beef cattle.
NON-TECHNICAL SUMMARY: Dairy and beef cattle infected with the bacteria Mycobacterium paratuberculosis may eventually develop chronic diarrhea (commonly known as Johne's disease) which decreases the market value and productivity of the infected animal and spreads the organism to uninfected cattle.  This research will estimate the prevalence of Mycobacterium paratuberculosis infection in Utah cull dairy and beef cattle and provide useful information to help educate Utah veterinarians and cattle producers about Johne's disease.
OBJECTIVES: 1. Estimate the seroprevalence of antibodies specific for Mycobacterium avium subspecies paratuberculosis in Utah cull dairy and beef cattle.  2. Compare the level of agreement between the Johne's ELISA test and the Johne's Tip-Test.
APPROACH: Individual blood samples will be collected from 2000 cull dairy and beef cattle from a single abattoir in northern Utah.  One milliliter aliquots of serum will be placed into cryovials and frozen at -18 C (0 F) until all samples are collected and can be submitted as a single lot.  Serum samples will be analyzed for Mycobacterium avium subspecies paratuberculosis specific antibodies using both the Johne's ELISA test and the Johne's Tip-Test.  Test results will be entered into a spreadsheet (Excel).  The auction market of origin will also be recorded for each individual cow. Mycobacterium avium subspecies paratuberculosis seroprevalence rates will be calculated from these data for the overall state and for each of the 8 auction markets in Utah.  The level of agreement between the Johne's ELISA test and the Johne's Tip-Test will also be calculated and reported. PROGRESS: 2000/07 TO 2003/12  The four objectives of this project are as follows:1) Describe the seroepidemiology of Mycobacterium avium subspecies paratuberculosis (MAP) in cull dairy and beef cattle of Utah origin; 2) Compare the agreement between two MAP antibody detection tests (IDEXX ELISA, ImmuCell Tip-Test); 3) Estimate MAP herd prevalence in Northern Utah dairies; 4) Identify unique production and management practices that are associated with MAP infection in Northern Utah dairies.  All project objectives have been completed.   Objective 1: Serum samples from Utah cull dairy and beef cattle were collected and analyzed for MAP antibodies.  The apparent seroprevalence of MAP in Utah cull dairy and beef cattle is 3.84% (42/1096) and 0.09% (1/1086), respectively.  County seroprevalence rates are available upon request.  Objective 2: Two MAP antibody detection tests were compared.  There was a moderate level of agreement (Kappa = 0.48) between the IDEXX ELISA and the ImmuCell Tip-test. However, the two MAP antibody detection tests gave statistically different results (P <0.05).  These results suggest that the two tests should not be considered as similar for use in Johne’s Disease control programs.  Objective 3: Blood and fecal samples were collected from 86 dairy herds in Box Elder, Cache, and Weber counties representing almost 50% of the total cow population in Utah.  Blood was collected from 30 randomly selected, 2nd lactation or older cows within each herd and analyzed for MAP antibody using the IDEXX ELISA test.  Fecal samples were collected from MAP seropositive cows and cultured for a minimum of 16 weeks.  Bacterial colonies were confirmed as MAP using both Zehl-Neelsen stain and PCR.  A MAP positive herd was defined as one where MAP was definitively identified (by culture & PCR) from a cow within that herd.  The apparent MAP herd prevalence in northern Utah dairies is 19.8% (true prevalence: 23.5-59.9%).  Objective 4: A survey evaluating 82 aspects of herd production and management was also completed during on farm sample collection by the herd owner.  The relationship between these factors and MAP positive herds was evaluated using multiple regression analysis.  Dairy herds that had purchased heifers or cows within the last five years were 40 times more likely to be MAP positive compared to herds that did not purchase heifers or cows or just purchased bulls.  Jersey herds were 2.8 times and mixed breed herds were 14.7 times more likely to be MAP positive compared to Holstein herds.  Herds that shared a common fence line between 2-6 month old calves were 12.3 times more likely to be MAP positive compared to those which did not share a common fence line.  These data suggest that Johne’s Disease is common in Utah dairy herds, particularly in herds that purchase heifers/cows and that true MAP prevalence is higher among Jersey and mixed breed herds compared to Holstein herds.  The data also suggest buying bulls and showing cattle are not risk factors for MAP in Utah herds.
IMPACT: 2000/07 TO 2003/12  MAP infection in cattle causes a chronic, debilitating, and production limiting condition in cattle referred to as Johne’s Disease.  The information in this study demonstrates that Johne’s Disease is common in Utah dairy herds and much more common in herds with certain characteristics.  The results from this study will be used to help educate Utah cattlemen about Johne's Disease and to promote and direct efforts of a Utah state Johne’s Disease control program.
PUBLICATIONS: 2000/07 TO 2003/12
No publications reported this period
PROJECT CONTACT:
     Name: Bingham, H. R.  Phone: 435-797-7146.  Fax: 435-797-3959
     E
mail:
hbingham@cc.usu.edu

 

PROJ TYPE: USDA COOPERATIVE AGREEMENT PROJ STATUS: NEW
START: 30 SEP 2004 TERM: 29 SEP 2009
INVESTIGATOR: Karns J S; Smith J; Van Kessel J S.
PERFORMING INSTITUTION: University of Vermont.  Burlington, Vermont 05405
SUBJECT:  Pilot study of factors affecting maintenance of Mycobacterium, Salmonella, E. coli and Listeria on dairy farms.
OBJECTIVES: The objective of this research is to identify and characterize a third dairy herd to be included in a Pilot Program that currently consists of two dairy herds and which focuses on the protocol development, laboratory set-up, program logistics, and database and bio-bank development needed to evaluatesuch that the impact of intervention strategies on Johne's disease dynamics, milk and beef quality (particularly with respect to zoonotic bacterial pathogens), economics and sustainability can be evaluated through intensive longitudinal follow up of selected research/demonstration dairy farms.  Long-term goals are to validate intervention strategies to support best management practices (BMPs) and to optimize intervention and monitoring strategies given the constraints on time, labor and financial resources in modern dairy herds.  In addition, a national resource bank (data and biological specimens on well-characterized animals) will be created for current and future monitoring and research on dairy cattle diseases.  Emphasis will be on longitudinal data collection on endemic infectious diseases of public health and animal health concern in dairy herds.
APPROACH: Pathogens are of increasing concern on dairy farms and in dairy products.  The production of safe and wholesome food from US farms requires control of the production process on the farm.  Specific focus areas in this process are biosecurity, food safety and animal health.  To be able to scientifically support regional process control programs there is a need for longitudinal research on commercial dairy farms throughout the United States.  In the past year, Cornell University, The Pennsylvania State University, and the University of Pennsylvania, which are all participants in the Regional Dairy Quality Management Alliance (RDQMA), have collaborated with the USDA's Environmental Microbial Safety Laboratory to investigate 2 operating dairy farms to determine sites that act as reservoirs for pathogenic microorganisms that affect animal health and that decrease product quality because of their zoonotic nature. Farms in Vermont (also an RDQMA member) will be identified as candidates for inclusion in this investigation and 1 will be chosen for extensive sampling based on the previous occurrence of Johne's disease and/or Salmonella infection.  Serum, feces, bulk tank milk, and environmental samples (water, bird and rodent feces, feed, etc.) will be taken on the farm.  In addition, tissue samples will be obtained from carcasses of culled animals.  Samples will be distributed among the university and ARS researchers for analysis to determine the presence of Mycobacterium avium paratuberculosis (the causative agent of Johne's disease in cattle) and for Salmonella enterica, Escherichia coli O157:H7, and Listeria monocytogenes (human food-borne pathogens of concern in dairy products).  This research will be the first to attempt a comprehensive analysis of both Johne's disease and food-borne pathogens on working dairy farms.  It will allow us to determine a baseline for these organisms on 3 farms and set the stage for investigation of the effect of interventions, in the form of BMPs, on animal health and product quality.

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: NEW
START: 01 JUL 2005 TERM: 30 JUN 2006 FY: 2005
INVESTIGATOR: Boyle, S. M.; Sriranganathan, N.; Gwazdauskas, F. C.
PERFORMING INSTITUTION: College of Vet Medicine.  Virginia Polytechnic Institute.  Blacksburg, Virginia 24061
SUBJECT:  Immune response in cattle to Brucella abortus RB51 over-expressing protective antigens.
NON-TECHNICAL SUMMARY: Current vaccines against brucellosis do not afford specific protection against other cattle diseases.  The development of a multivalent vaccine to protect against brucellosis and other cattle diseases would make vaccination programs more cost effective.  This project assesses the ability of a second generation vaccine derived from vaccine strain RB51 to induce antibodies or cellular immune responses consistent with protection against mycobacterium infections.
OBJECTIVES: 4. Objectives: The overall purpose of the objectives outlined is to test the immunogenicity of the new vaccines following subcutaneous administration to cattle: a) of RB51 strains over-expressing either Mycobacterium ESAT6 antigen or B. abortus SOD antigen.  By injecting these RB51 platform vaccines, we will produce immunized subjects that will serve as a source of serum and cells to measure immune parameters that can correlate with protection against tuberculosis and/or brucellosis in cattle. b) and testing the humoral and cellular immune responses (adaptive).  By measuring the levels and isotypes of the immunoglobulins to specific antigens (Brucella, Mycobacterium and anthrax) as well as the cellular immune responses (i.e. cytokines), we will learn if the vaccines are inducing immune correlates consistent with protection.
APPROACH: Our ability to raise healthy cattle, free of zoonotic diseases such as Brucella spp., has had a positive impact on both the health and expenditures of producers and consumers of animal foods in Virginia and the USA.  Since the implementation of the Brucellosis eradication program in 1950s, it is estimated that the steady reduction over the past 50 years and virtual elimination of brucellosis in cattle herds in 2000 has saved the US millions of dollars annually in terms of cattle and human costs (1). There are still concerns about other zoonotic agents including Mycobacterium bovis, M. paratuberculosis for which no effective vaccines are available for cattle and threaten the health of both cattle and humans.  Thus new vaccines that can take advantage of proven vaccines to deliver protective antigens represent an efficient means to immunize susceptible populations.  In the proposed work, the USDA approved cattle vaccine, Brucella abortus RB51, will be assessed for its ability to act as a platform to deliver specific antigens to induce immune responses in cattle that correlate with protection against specific pathogens i.e. in addition to Brucella spp.  If such protective immune responses (e.g. humoral and cellular) are observed, then additional funding will be sought at the federal level to set up challenge studies in cattle.  The development of such a platform-based vaccine will allow for the prevention of several diseases with one one dose of an attenuated vaccine.  This type of technology will be cost effective and efficient and minimize side effects seen with multiple vaccination schemes.  In addition, a platform based vaccine that can be rapidly formulated and prevent several types of diseases will allow us to respond quickly to biological threats whether they be initiated by natural or terrorist means.
PROGRESS: 2004/10 TO 2005/09  We have successfully prepared the saline, strain RB51, strain RB51/WboA and RB51/SOD/Esat6 target antigens and immunized 23 of our 36 heifers subcutaneously.  30ml of blood per calf was collected via jugular venipuncture every other week for four weeks.  Plasma was harvested from 10mL of whole blood and stored for evaluation of antibody production using antigen specific ELISA.  From the remaining 20ml of blood collected, we have completed the lymphocyte separation and proliferation assessment using an Alamar blue colorimetric assay.  The data is currently being analyzed by the graduate student on the project.  In addition, supernatants were collected and stored from the lymphocyte proliferation assays and will be evaluated for Interferon Gamma expression using commercially available sandwich ELISA.  The ELISA data for these heifers should be processed and analyzed by the beginning of the spring semester, when we will follow up with the same procedures on the last 13 of our 36 heifers. IMPACT: 2004/10 TO 2005/09  The research data generated in this project will allow us to determine if cattle can be vaccinated and protected against several pathogens using an approved USDA/APHIS cattle vaccine.  If successful, this multivalent vaccine has the potential to lower the cost of the vaccine and veterinarian time to administer the protective shots.  The environmental impact should be aided by the reduction in materials needed to be generated to produce and deliver a single multivalent vaccine instead of several vaccines.
PUBLICATIONS: 2004/10 TO 2005/09
No publications reported this period
PROJECT CONTACT:
     Name: Boyle, S. M.  Phone: 540-231-4641  Fax: 540-231-3426
     E
mail:
smboyle@vt.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: REVISED
START: 01 NOV 2003 TERM: 31 OCT 2006 FY: 2005
INVESTIGATOR: Fox, L. K.; Hancock, D. D.; Gay, J. M.
PERFORMING INSTITUTION: Animal Science.  Washington State University.  Pullman, Washington 99164
SUBJECT:  Investigation of food animal disease problems in the state of Washington.
NON-TECHNICAL SUMMARY: The control animal disease and of zoonotic and food-borne disease agents can be addressed by epidemiological research at the level of the farm.  Research that can define the epidemiology of zoonotic pathogens in the livestock industry can lead to HACCP procedures that will reduce their impact on the well being of the public.  
OBJECTIVES: 1. To define and resolve important and emerging animal diseases in agricultural production systems.  2. To define and resolve problems of food safety and food quality generated at the farm level by on-farm research in animal agricultural production systems.  3. To define and resolve problems of zoonotic disease in agricultural animals by on-farm research.
APPROACH: The identification of herd disease problems requiring investigation and research, and herds to collaborate in research, will be through the accessions of the Washington Animal Disease Diagnostic Laboratory, through specific livestock industry requests, and through identification of problems and herds by private veterinary practitioners and county livestock agents.  The Washington Animal Disease Diagnostic Laboratory receives samples from herds with problems throughout the State and its accessions can readily identify a disease problem occurring or developing at multiple sites throughout the State.  Disease investigative teams will be formed for each disease problem that is identified as an emerging disease that warrants investigation.  The team will consist of a core and ancillary members.  The core will consist of epidemiologists and species specialists from the Field Disease Investigation Unit.  The ancillary group will be those scientists in the Veterinary College and the College of Agriculture and Home Economics at Washington State University or other faculty members at WSU that have particular expertise pertinent to the problem at hand.  The team will plan the method of investigation of the problem and the analytical approach required.  The actual investigation in the field will be the responsibility of the core group.  The ancillary group will provide support in terms of their technical and laboratory expertise.  A disease problem that has been identified as a potential candidate for further investigation will be considered for selection only if there is a reasonable chance that its investigation will lead to resolution of the problem or a significant advance in knowledge.  This will limit investigations to those disease problems that relate to the particular expertise of faculty within the departments of the Veterinary College and the College of Agriculture and Home Economics at WSU. Investigations will also consider diagnosed herd or flock problems where there is a lack of epidemiologic knowledge on which to base a sound, preventive or control program and problems where epidemiologic investigation could lead to an advance in knowledge.  The methodology of investigation will vary according to the problem under consideration.  In general, it will include the detailed definition of the problem by farm visitation, data recording, and record analysis and the establishment of hypotheses and risk factors for its cause and spread by standard epidemiologic analysis, laboratory analysis, post mortem analysis and response trial analysis.  For those diseases where there funded projects (verotoxigenic Escherichia coli, Salmonella typhimurium DT104 and Listeria monocytogenes) study design and analysis is according to the grant proposal.  Study herds are identified that have management or other characteristics required for the study.  Herds may be selected on demographic characteristics, production characteristics or other parameters for survey studies or in selected cross sectional, case control or cohort studies.
PROGRESS: 2005/01 TO 2005/12The Agricultural Animal Health Group has had several areas of focus.  Currently we have a program in Johne’s disease, where the agent is Mycobacterium paratuberculosis.  Dr. Gay is a member of the Washington State Johne’s Advisory Committee with contributing members from the states dairy and beef commodity associations, the WSVMA, and the State Department of Ag.  The objective of this committee is to broaden focus of herd assessments and control strategies for this disease.  Additionally, a graduate student, Dr. Allen, is conducting trials to elucidate the early immunological response of the bovine to infection with M. paratb.  The surgical procedures for a calf ileal inoculation model have been developed and some preliminary initial immunological response studies have begun.  A trial on the efficacy of a neospora vaccine that is designed to prevent the vertical transmission of this disease is ongoing.  Stakeholder input was solicited from veterinary practitioners and a pharmaceutical company on the design and implantation of this trial.  The alkaloid in lupines is teratogenic and will induce crooked calf disease.  With stake holder input and support, the WA State Cattlemans association and the Poisonous Plant Research Unit of USDA in Logan, UT, lactating cows were fed Lupinus leucophyllus and analytical protocols were developed for analysis of lupine alkaloids in milk.  Significant levels of teratogenic alkaloids were detected in the blood and milk of cows fed L. leucophyllus.  Absorption and elimination profiles were determined in blood and milk.  In a second trial the cows were grouped by body condition scoring; fat and thin cows were split into 2 groups and allowed to graze lupines.  Thin cows ate significantly more lupines and may have had a significantly reduced body detoxification of alkaloids.  As expected, consumption was affected by grazing time.  The impact of these studies is the development of strategies to minimize ingestion of these toxic plants.  The data to date would indicate that cattle should be segregated by body condition and only more conditioned cows should be allowed to graze in areas with potential lupine infestation.  A major goal of the continuing project is to sample and record alkaloid levels in plants in a year that results in sufficient risk as well as attempt to develop management tools to avoid major impacts by understanding the plant physiology and environment relationships to grazing livestock.
IMPACT: 2005/01 TO 2005/12  The impact of the Johne’s disease work may be high.  Johne’s is a disease that has been linked to Crohn’s disease in humans.  Efforts to reduce Johne’s in cattle will not only increase profitability on cattle operations, but diminish the possible link to a human health hazard.  A successful vaccine will have significant impact in a reduction in the transmission of this abortifacient.  Regarding lupine toxicology, the impact of information gathered that will reduce ingestion of this plant will reduce morbidity and thus improve production efficiency by increasing the number of healthy calves and improved feed conversion.
PUBLICATIONS: 2005/01 TO 2005/12
1. Smith, E.M., L.E. Green, G.F. Medley, H.E. Bird, L.K. Fox, Y.H. Schukken, J.V. Kruze, A.J. Bradley, R.N. Zadoks, and C.G. Dowson. 2005. Multilocus sequence typing of intercontinental bovine Staphylococcus aureus isolates. J. Clin. Micro 43:4737-4743.
2. Fox, L.K., J.H. Kirk, and A. Britten. 2005. Mycoplasma mastitis: A review of transmission and control. J. Vet. Med. 52:153-160.
3. Biddle, M.K., L.K. Fox, M.A. Evans, and C.C. Gay. 2005. Pulsed-field gel electrophoresis patterns of Mycoplasma isolates from various body sites in dairy cattle with Mycoplasma mastitis. JAVMA 227:445-459.
4. Chang, S. B., G.A. Bohach, S.U. Lee, W.C. Davis, L.K. Fox, W.A. Ferens, K.S. Seo, H. C. Koo, M.H Kwon, Y.H. Park. 2005. Immunosuppression by T regulatory cells in cows infected with Staphylococcal superantigen. J. Vet. Sci. 6:247-250.
5. Griffin KB, J.J. Michal, L.K. Fox, C.T. Gaskins, J. Jiang. 2005. Fine mapping of the bovine chromosome 22q24 region that harbors antimicrobial genes and a QTL for somatic cell score. Animal Genetics 36:448-450.
PROJECT CONTACT:
     Name: Fox, L. K.  Phone: 509-335-0786  Fax: 509-335-1082
     Email: fox@wsu.edu

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: TERMINATED
START: 01 AUG 1995 TERM: 30 JUN 2002 FY: 2002
INVESTIGATOR: Mcelwain, T. F.; Knowles, D. P.; McGuire, T. C.
PERFORMING INSTITUTION: Animal Health Research Center.  Washington State University.  Pullman, Washington 99164
SUBJECT:  Agricultural animal health unit.
OBJECTIVES: The WSU CVM has established the Agricultural Animal Research and Investigation Unit (AARIU) to consolidate all of the College's efforts on behalf of the agricultural animal industries.  The AARIU mission is to enhance the well-being of agricultural animals and wholesomeness of food animal products in the State of Washington and Pacific Northwest through comprehensive disease diagnosis, field investigation, and laboratory research.  It is a multidisciplinary unit with expertise in individual animal and population medicine, laboratory diagnostics, and research provided primarily through the Washington Animal Disease Diagnostic Laboratory, Field Disease Investigation Unit, and Animal Health Research Center.  AARIU efforts are divided into two primary areas: (1) disease diagnosis, consultation and field investigation; and (2) research.  The objectives of this CRIS project are to support AARIU infrastructure and research efforts in improved disease control, with an initial focus on food safety, molecular diagnostics, and transgenic disease-resistant animals.
APPROACH: AARIU investigators have an active program of research on the epidemiology of E.coli O157:H7, and have recently recognized the emergence of a Salmonella typhimurium phage type 104 with a unique antibiotic resistance profile and significant animal and public health impact.  Initial studies are aimed at the development of rapid and reliable methods of specifically identifying infected animals and animal populations, and to implement these tests in prevalence and case control studies.  Additional AARIU research projects include the field testing and implementation of monoclonal antibody and recombinant antigen based CI-ELISA assays for anaplasmosis, neosporosis, and caprine arthritis and encephalitis virus; development of rapid assays to quanititatively assess the immune response of ruminants; and development of transgenic disease resistant cattle.  All objectives represent well the mission of AARIU - to promote the health and well being of agricultural animals through coordinated efforts extending from the field to the research laboratory.
PROGRESS: 1995/08 TO 2002/06  This project was an umbrella infrastructure project of the Agricultural Animal Health Program (AAHP) in the College of Veterinary Medicine, and provided temporary funding to address emergent regional disease problems in agricultural animal health under advisement and recommendation of practicing veterinarians, commodity groups, and formal Advisory Boards of the AAHP.  Seed research funds are provided toward agricultural animal health and food safety problems that have regional application and significance, with a goal of leveraging these funds into significant extramural support for a larger program of research.  Projects on the immune response against Neospora caninum, a significant cause of bovine abortion in the Pacific Northwest; Salmonella typhimurim phage type DT104 characterization, ecology and infection; Mycobacterium avium paratuberculosis (Johne's Disease) diagnostic assay development; Mycoplasma bovis outbreak isolate characterization; crooked calf disease epidemiology; and antimicrobial resistance development and maintenance on dairies have all been supported.  Research results for Neospora caninum, Salmonella typhimurium DT104, and Johne's Disease have previously been reported.  Field disease investigations over the last year have included continued investigation of the emergence and epidemiology of Salmonella DT104, S. Newport, and Listeriosis in dairies; ecology of E. coli O157:H7 in feedlots; an increase in Mycoplasma mastitis, otitis and pneumonia in Washington State dairies; and the continued occurrence of crooked calf disease in cow/calf operations in Central Washington related to the presence of lupines in natural grasslands.  Management practices for controlled grazing and pasture management methods to reduce the prevalence of this disease are being investigated.  Farm management practices and ecological factors that affect the emergence of antimicrobial resistance in animal pathogens also have been investigated.  Importantly, the continued presence of antibiotic resistant bacteria in dairy calves after the withdrawal of antibiotic treatment indicates that factors other than the use of antibiotics may be responsible for maintenance of multiple antibiotic resistant strains in this environment.  A novel technique for typing food-borne agents using microarray technology has been developed.  This assay is now being used to identify genes unique to isolates that are capable of surviving in specific ecological niches on farms and in processing plants.
IMPACT: 1995/08 TO 2002/06  Regional animal health issues are addressed through funding under this umbrella project.  Guidance from stakeholders helps ensure that projects focus on relevant animal health issues.  Successful completion of the projects will provide solutions to important agricultural animal health problems in the Pacific Northwest.
PUBLICATIONS: 1995/08 TO 2002/06
1. Call, DR, Borucki MK, Loge FJ. 2003. In press. Detection of bacterial pathogens in environmental samples using DNA microarrays. J Micro Methods.
2. Barrington GM, Gay JM, Eriks IS, Davis WC, Evermann JF, Emerson C, O'Rourke JL, Hamilton MJ, Bradway DS. 2003. Temporal patterns of diagnostic results in serial samples from cattle with advanced paratuberculosis infections. J Vet Diagn Invest 15:195-200.
3. Borucki MK, Krug MJ, Muraoka WT, Call DR. 2003. Genetic characterization of Listeria monocytogenes using DNA microarrays. Vet Micro 92:351-362.
4. Call, DR, Borucki MK, Besser TE. 2003. Mixed-genome microarrays reveal multiple serotype and lineage-specific differences for Listeria monocytogenes. J Clin Micro 41:632-639.

 

PROJ TYPE: ANIMAL HEALTH PROJ STATUS: TERMINATED
START: 01 JUL 2001 TERM: 30 JUN 2002 FY: 2002
INVESTIGATOR: Barrington, G. M.; Davis, W. C.; Eriks, I. S.; Gay, J. M.
PERFORMING INSTITUTION: Animal Health Research Center.  Washington State University.  Pullman, Washington 99164
SUBJECT:  CD4+ T-cell IFN-gamma expression in bovines infected with M. paratuberculosis. NON-TECHNICAL SUMMARY: Paratuberculosis (Johne's Disease) is a chronic, debilitating gastrointestinal disease of ruminants and other species world wide.  Currently, available diagnostic tests are unable to reliably detect infected animals until very late in the disease.  This proposal describes the development of a diagnostic test that will allow the earliest detection of animals infected with M. paratuberculosis.
OBJECTIVES: Paratuberculosis (Johne's Disease) is a chronic debilitating gastrointestinal disease of ruminants and other species caused by the bacterium Mycobacterium avium subspecies paratuberculosis (Map).  It has a worldwide distribution and is increasing in prevalence.  In the United States, paratuberculosis is especially prevalent in the dairy industry where it results in significant economic costs due to decreased production, increased treatment, and premature death losses.  Recently, both scientific and lay articles have called attention to the potential link between Map and Crohn’s's disease in humans.  Such publicity may have a significant impact on agriculture through altered consumer confidence, even if Map is not causal.  Clearly, paratuberculosis is, and will continue to be, a major concern for United States animal agriculture.  Currently, available diagnostic tests for paratuberculosis cannot reliably detect infected animals during stage I, or the 'silent infection' period.  This seriously hampers implementation of control measures and facilitates propagation of the disease.  However, one general testing strategy has significant promise for enabling early detection.  Tests based on cell mediated immune (CMI) responses are likely to allow early detection because the initial reaction to mycobacterium infections is a CMI response.  In this proposal we describe the development of a CMI-based diagnostic test using state of the art, flow cytometry technologies.  We believe this technique will have exceptional potential for enabling early detection of disease as well as characterizing the immune response to Map during the earliest stages of disease.  This assay will also be an essential tool for the examination and characterization of various Map antigens.  This knowledge is critical for the development of vaccines for paratuberculosis, and will allow differentiation of diseased versus vaccinated animals.
APPROACH: This project is designed to validate the flow cytometric assay in animals known to be infected with Map.  Study animals will be chosen from local cooperating dairies based on their infection status as determined by ELISA, fecal and milk PCR, and fecal culture results.  The dairy supplying samples from infected animals has ongoing monthly serologic testing of all late gestation cows.  Access to the 3500 cows in this herd (20% ELISA positive prevalence) will enable the selection of a pool of infected animals.  Samples from non-infected control animals will be obtained from the Washington State University research dairy.  The WSU dairy has not had a case of paratuberculosis diagnosed on the farm for over 30 years and a whole-herd ELISA screen is underway to verify its status for the purposes of this research thrust.  Three groups of cattle will be tested including 5 subclinically infected animals, 5 clinically infected animals and 5 non-infected control animals.  Clinically infected cows will be included because earlier studies have conflicting findings regarding IFN-gamma production by cells obtained from late-stage Map infected animals.  Non-infected cows from the negative herd will serve as negative case controls.  A variety of antigens will be used to stimulate cytokine production by memory T-cell populations.  These will include different preparations of whole Map organisms, Johnin PPD, as well as a non-specific T-cell mitogen.  Data obtained from these assays will also serve as a valuable baseline for further studies designed to investigate specific isolated Map antigens.  Multicolor flow cytometry will be used to identify T-cell subsets responding to Mycobacteria antigens by recognizing which subsets are producing cytokines.  Current cell-mediated immunity assays for IFN-gamma production depend on adequate numbers of cells in the sample, yet they cannot distinguish which cells are producing IFN-gamma.  In contrast, flow cytometry has the greatest sensitivity for identifying specific antigen induced cytokine production in individual cells.  The commercially available bovine gamma interferon test kit (Bovigam, CSL Veterinary Limited, Victoria, Australia) will be used on samples concurrently as a positive IFN-gamma assay control.  Finally, the generation of data on cell profiles from subclinical, clinical and non-infected animals will provide novel information regarding the cellular immune status during different stages of paratuberculosis.
PROGRESS: 2001/07 TO 2002/06The validation of our assay to measure intracellular IFN-gamma in cells isolated from cattle infected with Map is in progress.  Studies are ongoing to characterize leukocyte subsets from the control and Map-infected calves.  Thus far, no major differences in leukocyte populations from Map-infected and control calves have been identified.  Work is also ongoing to identify cell surface molecule expression in leukocyte populations obtained from Map-infected calves.  Of great interest, we have observed differences in memory T-cell surface expression of CD25 (interleukin-2 receptor-alpha, IL2R-alpha) and CD26 (activation molecule 3, ACT-3) between Map-infected and control calves, whereby expression of these molecules is up-regulated in the infected calves.
IMPACT: 2001/07 TO 2002/06  Early and accurate detection of cattle infected with M. paratuberculosis is essential for investigating the immunology, pathobiology, and epidemiology of paratuberculosis.  A more thorough understanding of these areas will be critical for implementing successful and appropriate control and prevention strategies.
PUBLICATIONS: 2001/07 TO 2002/06
Barrington GM, Gay JM, Eriks IS, Davis WC, Evermann JF, Emerson C, O'Rourke JL, Hamilton MJ, Bradway DS. 2003. Temporal patterns of diagnostic results in serial samples from cattle with advanced paratuberculosis infections. J Vet Diag Invest (in press)
PROJECT CONTACT:
     Name: Barrington, G. M.  Phone: 509-335-0703  Fax: 509-335-3330
     Email:
geob@vetmed.wsu.edu

 

PROJ STATUS: TERMINATED
START: 01 JUL 2002 TERM: 30 JUN 2003 FY: 2003 INVESTIGATOR: Davis, W. C.; Barrington, G. M.; Park, Y. H.
PERFORMING INSTITUTION: ANIMAL HEALTH RESEARCH CENTER WASHINGTON STATE UNIVERSITY PULLMAN, WASHINGTON 99164
SUBJECT:  Rapid universal diagnostic assays for detection and differentiation of animals infected with M. bovis and/or M. paratuberculosis.
NON-TECHNICAL SUMMARY: Two mycobacteria are of economic importance and a potential health hazard for animals and humans: M. bovis, the causative agent of bovine tuberculosis and M. paratuberculosis, the causative agent of Johne's disease (paratuberculosis).  The lack of effective vaccines and rapid diagnostic tests for early detection has made eradication of these diseases difficult.  There is an essential need to develop better assays to control these diseases.  The primary objective of this research is to develop rapid simple diagnostic assays that can be used for early diagnosis and control of these diseases.  
OBJECTIVES: 1. Demonstrate an anti-RBC monoclonal antibody conjugated with peptide sequences containing an epitope derived from species-specific early antigens expressed by Mbv and Map can be used in an autologous hemagglutination assay to detect animals infected with either pathogen.  2. Demonstrate a commercial latex bead coated with peptide sequences containing an epitope derived from species-specific early antigens expressed by Mbv and Map can be used in an agglutination assay to detect animals infected with either pathogen.
APPROACH: 1. A non-hemagglutinating mAb, TH17A (IgM), known to recognize a highly conserved determinant on RBCs and leukocytes, will be used in the initial studies to prepare ESAT-6 and a362 peptide conjugates.  Peptides containing the immunodominant determinants of ESAT-6 and a362 will be prepared with an extra lysine for conjugation with the mAb.  Following purification, the mAb will be treated with sodium periodate to generate aldehyde groups on the carbohydrate sidechains.  The peptides will bind through an amine group to the aldehyde.  The binding of mAb-peptide conjugates to RBC will be demonstrated by flow cytometry.  Reactivity of the peptide will be determined by ELISA before and after coupling to the antibody, using immune sera from animals infected with Mbv or Map.  Nonspecific peptides will be coupled to the mAb and used as negative controls.  The mAb conjugates will be tested for their capacity to agglutinate in the presence of antibody.  2. A commercial source of sulfated 0.8 mM latex microspheres will be used in initial trials to develop bead assays to detect ESAT-6 and a362 peptide antigens.  The beads will be prepared according to the manufacturer's protocol and reacted with serial dilutions of ESAT-6 and a362 peptides.  Comparable sets of latex beads will be coated with nonspecific peptides to serve as negative controls.  Following validation of the capacity of the mAb and latex bead conjugates to form antibody-antigen aggregates, studies will be performed with sets of antisera from known infected animals and uninfected animals to establish the sensitivity and specificity of the assays. PROGRESS: 2002/07 TO 2003/06  The objective of the study was to develop and compare the sensitivity and specificity of two antigenic peptide based assays for use in the diagnosis and control of bovine tuberculosis and paratuberculosis.  A red blood cell (rbc) based antigen-antibody capture assay and antigen coated latex bead assay were developed and compared with the sensitivity and specificity of an existing enzyme linked immunosorbent assay (EIA).  An antigenic peptide from Mycobacterium bovis, ESAT-6, was used as the first test antigen.  The rbc based antigen assay proved to be difficult to use and not sufficiently sensitive so further efforts to develop the assay were stopped.  Comparison of the latex bead agglutination assay with the EIA, with a panel of sera obtained from infected and uninfected animals, showed both assays yield comparable levels of sensitivity, 94% and 96% respectively.  The data suggest it will be possible to develop a rapid latex bead based diagnostic assay for use in the diagnosis of animals infected with M. bovis.  Studies are now needed with blind panels of sera from known infected and uninfected animals to verify the sensitivity and specificity of the assay.  Studies are also needed to determine if a comparably sensitive latex bead agglutination assay can be developed for paratuberculosis.
IMPACT: 2002/07 TO 2003/06  Diagnostic assays that improve our ability to detect infected animals at early stages of disease will help control disease and the movement of infected animals into clean dairy and cattle operations.
PUBLICATIONS: 2002/07 TO 2003/06
No publications reported this period
PROJECT CONTACT:
     Name: Davis, W. C.  Phone: 509-335-6051  Fax: 509-335-8328
     Email:
davisw@vetmed.wsu.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT
PROJ STATUS: NEW
CONTRACT/GRANT/AGREEMENT NO: 2002-35204-11688 PROPOSAL NO: 2001-02282
START: 15 DEC 2001 TERM: 30 DEC 2003 FY: 2004 GRANT YR: 2002 GRANT AMT: $117,000
INVESTIGATOR: Barrington, G. M.; Davis, W. C.; Eriks, I. S.; Gay, J. M.
PERFORMING INSTITUTION: Animal Health Research Center. Washington State University. Pullman, Washington 99164
SUBJECT:  CD4+ T-cell IFN-y expression in bovines infected with M. paratuberculosis.
NON-TECHNICAL SUMMARY: Paratuberculosis (Johne's disease) is a chronic, debilitating, gastrointestinal disease of cattle, worldwide.  Strategies for control will ultimately be based on a thorough understanding of the biology and epidemiology of the disease.  Currently, the single largest impediment to improving our knowledge of this disease lies in the absence of a sensitive diagnostic test that identifies infected animals during the early phases of disease (Stage 1 or the 'silent infection' stage).  The primary goal of this project is to develop a novel diagnostic test to identify animals infected with Mycobacterium avium subsp. paratuberculosis (Map), the causative agent of paratuberculosis, during the early stages of disease.  To accomplish this goal, we will develop a test to measure substances produced by specific cells of the immune system in response to infection.  Once validated in known-infected animals, the test will be used to identify the earliest time in which infection can be identified in calves infected with Map, from birth until 15 months of age.  The test will also help define changes in the immune system of infected animals during progression of disease.  This diagnostic test will provide a critical tool to accelerate investigations of many aspects of paratuberculosis, eventually leading to development of vaccines and other preventative strategies that will reduce the prevalence of this infection in cattle.  Such knowledge will have a substantial positive benefit for U.S. and international animal industries and animal health.
OBJECTIVES: The objective of this project is to develop a flow cytometric-based assay capable of identifying cattle infected with Mycobacterium avium subsp. paratuberculosis (Map), the causative agent of paratuberculosis, during the earliest stages of disease.
APPROACH: The most promising early-stage diagnostic approach to paratuberculosis involves recognition of the cell-mediated immune response as it is the first detectable host response to Mycobacteria infections.  To date, the most proficient technology to evaluate such a response is multiparameter flow cytometry.  In this proposal, we hypothesize that a flow cytometry assay will demonstrate intracellular expression of interferon (IFN) gamma in activated CD4+ T lymphocytes of animals silently infected by Map.  Two specific aims are proposed to examine this hypothesis. Specific aim 1: Demonstrate the expression of IFN-gamma in activated CD4+ T lymphocytes of known Map-infected animals using multiparameter flow cytometry.  This aim will validate the flow cytometric assay in animals known to be infected with Map.  Study animals will be chosen based on their infection status as determined by enzyme linked immunosorbent assay (ELISA), fecal and milk polymerase chain reaction (PCR), and fecal culture results.  Samples from non-infected control animals will be obtained from a separate paratuberculosis-free dairy (no paratuberculosis diagnosed for 30+ years).  Three groups of cattle will be tested including 5 subclinically infected animals, 5 clinically infected animals and 5 non-infected control animals.  A variety of antigens will be used to stimulate cytokine production by memory T-cells including preparations of whole Map organisms, Johnin purified protein derivative (PPD), and a non-specific T-cell mitogen.  Flow cytometry will be used to identify T-cell subsets responding to Mycobacteria antigens by recognizing which subsets are producing cytokines.  Specific aim 2: Identify the age at which IFN-gamma expression by CD4+ T lymphocytes can be demonstrated in calves experimentally infected with Map.  A total of 8 male, castrated calves will be used for this study.  The calves will be separated into 2 groups of 5 infected and 3 control calves.  Calves will be infected multiple times during the first week of life to assure infection and to mimic exposure in an endemic herd.  Infected calves will be obtained from a dairy with endemic paratuberculosis mentioned in aim 1.  Control calves will be obtained from the paratuberculosis-free dairy previously described.  Sampling of calves will occur bi-monthly until the calves are 15 months of age.  This age is the approximate time that heifers are bred and is therefore a critical juncture for management decisions in the dairy industry.  Sampling during this period will identify the earliest age at which a cell mediated immune (CMI) response occurs and will facilitate characterizing the dynamics of the CMI response over time.  It is possible that calves will develop a CMI response at different ages and some calves may even develop clinical disease within the 15-month period.  We believe that data obtained from these calves will be critical for beginning to elucidate the heterogeneity of responses to Map infection.  Future studies will be directed at utilizing this assay in calves naturally infected with Map.
PROGRESS: 2002/01 TO 2002/12  Newborn Holstein calves were obtained for experimental infection with M. paratuberculosis (Map).  The day after birth, 5 calves were orally infected with 1x107 Map organisms for 7 consecutive days.  Three calves have been serving as non-infected controls.  Fecal, peripheral blood leukocytes and serum have been serially obtained from all calves on a bi-monthly to monthly basis for approximately the last 7 months.  Fecal cultures have been negative from infected calves thus far.  The validation of our assay to measure intracellular IFN-gamma in cells isolated from cattle infected with Map is still in progress.  Studies are ongoing to characterize leukocyte subsets from the control and Map-infected calves.  Thus far, no major differences in leukocyte populations from Map-infected and control calves have been identified.  Work is also ongoing to identify cell surface molecule expression in leukocyte populations obtained from Map-infected calves.  Of great interest, we have observed differences in memory T-cell surface expression of CD25 (interleukin-2 receptor-alpha, IL2R-alpha) and CD26 (activation molecule 3, ACT-3) between Map-infected and control calves, whereby expression of these molecules is up-regulated in the infected calves.
IMPACT: 2002/01 TO 2002/12  Early and accurate detection of cattle infected with M. paratuberculosis is essential for investigating the immunology, pathobiology, and epidemiology of paratuberculosis.  A more thorough understanding of these areas will be critical for implementing successful and appropriate control and prevention strategies.
PUBLICATIONS: 2002/01 TO 2002/12
Barrington GM, Gay JM, Eriks IS, Davis WC, Evermann JF, Emerson C, O'Rourke JL, Hamilton MJ, Bradway DS. 2003. Temporal patterns of diagnostic results in serial samples from cattle with advanced paratuberculosis infections. J Vet Diag Invest (in press)
PROJECT CONTACT:
     Name: Barrington, G. M.  Phone: 509-335-0703  Fax: 509-335-0880
     Email:
geob@vetmed.wsu.edu

 

PROJ STATUS: NEW
START: 01 OCT 2006 TERM: 30 SEP 2010
INVESTIGATOR: Landick, R.
PERFORMING INSTITUTION: Bacteriology.  Univ of Wisconsin.  Madison, Wisconsin 53706 SUBJECT:  Recombinant mycobacterial RNA polymerases for functional study and inhibitor screening.
NON-TECHNICAL SUMMARY: RNA polymerase is a good target for developing new antibiotics needed to control agricultural pathogens.  This project will develop new methods to produce RNA polymerases from agricultural pathogens and to use them to identify new antibiotic candidates. OBJECTIVES: This project will generate new methods for study of mycobacterial RNAPs by developing methods to produce them in recombinant form using E. coli (mycobacteria are exceptionally hard to grow in the lab, making direct purification difficult).  The recombinant mycobacterial RNAPs will be used to characterize the function of different mycobacterial sigma initiation factors involved in the mycobacterial life cycle, to characterize unique structural features of mycobacterial RNAP, to determine the termination mechanism of mycobacterial RNAPs, which is currently unknown, and to develop a novel method to screen for new inhibitors of mycobacterial RNAPs.  The work is directly relevant to major bacterial threats to Wisconsin agriculture, M. bovis and M. paratuberculosis.
APPROACH: We will construct overexpression plasmids for mycobacterial RNAPs and produce purified mycobacterial RNAPs for in vitro study.  These will include plasmids to produce M. bovis RNAP and M. paratuberculosis RNAP.  We will use recombinant RNAPs to study sigma interactions and intrinsic signal specificity. We will also test use of foreign and native sigmas by mycobacterial RNAPs, including E. coli sigma70, T. aquaticus sigmaA, M. bovis sigmaA, sigmaB, and sigmaF.  We will construct a deletion mutant to test the function of a sequence insertion (SI5) in mycobacterial RNAP beta prime subunit.  We also will identify mycobacterial transcriptional terminators in vitro.  Finally, we will use mycobacterial RNAP expression plasmids to screen for lineage-specific inhibitors of mycobacterial RNAP.
PROJECT CONTACT:
     Name: Landick, R.  Phone: 608-265-8475.  Fax: 608-262-9865
     Email:
landick@bact.wisc.edu

 

PROJ STATUS: NEW
START: 01 OCT 2006 TERM: 30 SEP 2009
INVESTIGATOR: Talaat, A.
PERFORMING INSTITUTION: Animal Health & Biomedical Science.  Univ of Wisconsin.  Madison, Wisconsin 53706
SUBJECT:  Genomic plasticity of Mycobacterium paratuberculosis causing Johne's disease.
NON-TECHNICAL SUMMARY: Cattle infection with Mycobacterium paratuberculosis causes Johne’s disease.  Millions of dollars (from the dairy industry) are lost every year because of the Johne’s disease especially in Wisconsin.  To better understand infection with M. paratuberculosis and to identify sound control measures.
OBJECTIVES: The main goal of this project is to evaluate the impact of genomic plasticity on the virulence of M. paratuberculosis, especially those circulating in human and animal populations.  APPROACH: We will begin our efforts by assessing the overall genomic rearrangements among a large number of M. avium and M. paratuberculosis isolates.  The virulence of representative isolates of each clade of mycobacteria will be examined using the mouse model of infection.  Moreover, we will delineate the role of M. paratuberculosis-specific GIs in mycobacterial persistence using homologous recombination techniques.  The gained knowledge from this project will lead to the design of novel vaccines and diagnostics that are necessary to combat Johne’s disease.
PROJECT CONTACT:
     Name: Talaat, A.  Phone: 608-262-2861  Fax: 608-262-7420
     Email:
atalaat@wisc.edu

 

PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 00-35204-9311 PROPOSAL NO: 2000-02295
START: 01 SEP 2000 TERM: 31 AUG 2003 FY: 2003 GRANT YR: 2000 GRANT AMT: $199,000
INVESTIGATOR: Collins, M. T.
PERFORMING INSTITUTION: PATHOBIOLOGICAL SCIENCES. UNIV OF WISCONSIN. MADISON, WISCONSIN 53706
SUBJECT:  Induction of diagnostically valuable M. a. paratuberculosis antigens.
NON-TECHNICAL SUMMARY: M. paratuberculosis antigens used to develop diagnostic tests for Johne's disease in livestock may vary depending upon the conditions under which the bacterium is grown.  This study will analyze the differences among antigens seen when M. paratuberculosis is grown under different conditions.
OBJECTIVES: To analyze protein expression patterns, growth rate, and phenotypic culture characteristics of M. paratuberculosis grown under different culture conditions mimicking aspects of its intracellular environment.  To determine which M. paratuberculosis proteins induced under varied culture conditions are novel and immunodominant in the natural course of bovine paratuberculosis.
APPROACH: We hypothesize that M. paratuberculosis responds to different culture conditions by producing different proteins.  Based on our in-depth experience with the organism plus a review of the literature addressing intracellular environments and preliminary studies, we have selected 5 chemical or environmental factors (Tween 80, iron, pH, oxygen tension, and heat shock) that have a high likelihood of affecting the physiological characteristics of M. paratuberculosis.  By varying these factors individually and in combination in a focused manner, we hypothesize that new proteins will be induced which may be immunodominant in the course of Johne's disease. M. paratuberculosis strains will be cultured under specified culture conditions and the growth curves will be measured.  Cellular, extracellular, and membrane bound proteins of M. paratuberculosis will be subjected to SDS-PAGE and BN-PAGE analysis to qualitatively and quantitatively compare protein profiles, and to Western blot analysis using a panel of sera from naturally infected cattle to identify immunodominant antigens.  Protein bands on Western blot that are recognized only by sera of infected vs. uninfected cattle will be considered indicative of M. paratuberculosis-specific immunodominant antigen(s).
PROGRESS: 2000/09 TO 2003/08  Study of M. paratuberculosis response to intracellular life in the infected host or extracellular life and persistence outside the host requires in vitro experimentation.  In vitro studies generally necessitate cultivation of the organism.  The work from this project demonstrated that multiple in vitro factors influence the degree to which M. paratuberculosis can withstand thermal stress or exposure to low pH conditions.  It illustrates that extrapolating from in vitro observations to the in vivo situation, be it a macrophage phagosome, raw milk, soil or lake water, is problematic and should be done with extreme caution.  However, careful characterization of the M. paratuberculosis can lead to a better understanding of the fundamental mechanisms of pathogen response to stress and adaptation to suboptimal environments.  For example, both sublethal heat stress and low pH stress cause up regulation of GroES which can repair damaged proteins. Interestingly, adverse conditions for M. paratuberculosis also caused up regulation of key cell wall synthesis enzymes, the Antigen 85 Complex, and this was then associated with greater amounts of mycolic acids in the cell wall.  A thicker cell wall could be another defensive strategy for M. paratuberculosis that may help survival under some adverse conditions.  M. paratuberculosis is a worthy adversary for animals and possibly humans.  Knowing the adversary will enhance our ability to control it.
IMPACT: 2000/09 TO 2003/08  Culture medium was shown to affect heat resistance, acid resistance, cell wall thickness, and protein profiles.  The impact of this work will be to draw the attention of future investigators to the profound impact of culture medium on the phenotypic characteristics of M. paratuberculolsis and thereby insure appropriate in vitro cultivation methods are used to study this important pathogen, avoiding laboratory artifact.  Specifically, this study will impact antigen production methods for Johne's disease diagnostic tests.
PUBLICATIONS: 2000/09 TO 2003/08
1. Sung, N., Collins, M.T. 2003. Variation in resistance of Mycobacterium paratuberculosis to acid environments as a function of culture medium. Appl. Env. Microbiol. 69:6833-6840.
2. Sung, N., Collins, M.T. 2004. A possible association of GroES and antigen 85 proteins with heat resistance of Mycobacterium paratuberuclosis. Appl. Env. Microbiol. (in press).
PROJECT CONTACT:
     Name: Collins, M. T.  Phone: 608-262-8457  Fax: 608-265-6463
     Email:
mcollin5@facstaff.wisc.edu

 

PROJ TYPE: OTHER GRANTS
PROJ STATUS: TERMINATED
CONTRACT/GRANT/AGREEMENT NO: 00-52100-9621 PROPOSAL NO: 2000-04294
START: 15 SEP 2000 TERM: 15 SEP 2005 FY: 2005 GRANT YR: 2000 GRANT AMT: $477,220
INVESTIGATOR: Shook, G. E.; Collins, M. T.; Kirkpatrick, B. W.
PERFORMING INSTITUTION: Dairy Science.  Univ of Wisconsin.  Madison, Wisconsin 53706
SUBJECT:  Genetic resistance to paratuberculosis in dairy cattle.
NON-TECHNICAL SUMMARY: Paratuberculosis, commonly known as Johne's Disease, affects 22 percent of all U. S. dairy herds and nearly 40 percent of herds larger than 300 cows.  This incurable disease continues to spread and is estimated to cost the U. S. dairy industry over $200 million annually.  This project seeks to discover locations of genes on chromosomes that influence resistance and susceptibility to Johne's Disease.  Knowledge of these chromosomal regions will enable the dairy industry to breed cattle that are genetically more resistant to this disease.  The project will test a total of 6,000 daughters of 15 prominent U. S. Holstein sires.  Diagnostic tests for Johne's Disease will be carried out for these daughters in cooperating commercial herds throughout the U. S. Genotyping will be done for 140 genetic markers spread across all 29 cattle chromosomes [excluding sex chromosomes].  Genetic markers inherited from the sires will be compared between infected and uninfected daughters to locate the genes for susceptibility and resistance.  For the 15 sire families involved in this research it will be possible to identify specific sons and daughters that inherited chromosomes with the resistance genes.  Breeding for genetic resistance has been a successful strategy for control of many plant diseases; this approach has not been applied in animals.  Genetic resistance to infectious disease has been well documented in laboratory animals, poultry, and livestock.  This project will be an early practical example of using molecular genetics as an aid to preventing disease in livestock.
OBJECTIVES: The long-term objective of our collaboration is to develop a genetic approach to prevention of paratuberculosis in cattle.  The specific objectives for this project are: 1) Establish a resource of DNA samples and paratuberculosis test results for 15 half sib families of Holstein cattle for study of genetic resistance to paratuberculosis; 2) Search for segregating DNA markers throughout the cattle genome that are associated with resistance or susceptibility to paratuberculosis in five sire families.  The paratuberculosis test results and DNA samples obtained under objective 1 will later be used to complete a genome wide scan in the remaining ten sire families; 3) Disseminate the results of this research to: a) producers, veterinarians, and dairy extension agents throughout the country, b) sire procurement personnel in the artificial insemination industry, and c) students in our undergraduate, graduate, and veterinary medicine courses.
APPROACH: A genome wide search for DNA markers linked with major genes that influence paratuberculosis resistance or susceptibility will be carried out.  This scan will involve 140 heterozygous markers across all 29 autosomal chromosomes.  We propose to study a total of 6000 daughters of 15 prominent sires in 400 to 600 commercial dairy herds throughout the country.  This project will complete the disease testing for all 15 sire families and genotyping for five sire families.  Subsequently, with additional funding, the genome wide search will be completed for the remaining ten sire families.  Paratuberculosis will be assessed by the combination of an ELISA test for serum antibody to the pathogen and bacterial culture of the pathogen from fecal samples.  In herds with disease prevalence between 5 and 25%, predictive values for both positive and negative test results are greater than 90% for the combined tests.  Genotyping will be performed selectively for all daughters that are positive for either of the two diagnostic tests.  Advantages for genotyping positive animals include a considerable reduction in the number of animals genotyped and the fact that the diagnostic tests have a low rate of false positive results.  Animals with negative test results may have escaped exposure to the disease and the diagnostics have a moderately high rate of false negative results; therefore, these cases would not indicate resistance to disease even though test results are negative.  Data analysis will be carried out within sire families: For loci with no effect on disease resistance, affected daughters are expected to have inherited with equal frequency one of the two alleles from their sire.  Loci at which the two sire alleles differ in their disease resistance will be revealed by a high frequency of the susceptible allele and low frequency of the resistant allele among affected daughters.  We plan a proactive nationwide program of extension activities and website development to make our findings known to producers, veterinarians, the animal genetics industry, and dairy extension agents.
PROGRESS: 2000/09 TO 2005/09  Phase 1 of the project involved collecting blood and fecal samples for disease testing and a second blood sample for DNA extraction. A total of 308 cooperating commercial, pedigreed herds submitted samples.  Our final resource population consisted of 4233 daughters of 12 project bulls in a daughter design.  The 12 project sires were selected based on large numbers of daughters in production and low genetic relationships among sires.  Two disease diagnostic tests for M. paratuberculosis were performed on each cow: a serum antibody ELISA and a fecal culture for the pathogen.  A cow was classified as infected if positive to either test.  Only daughters from herds with direct evidence of disease were included in these studies. Phase 2 involved quantitative analysis of the disease test results.  Predicted apparent prevalence of Johne's disease in bulls' daughter groups ranged from 5.3 to 10.4% and averaged 7.9%. Heritability for disease susceptibility from the combined antibody and fecal culture tests was 10.2%.  These results demonstrate that important genetic variation exists among bulls and that selection against disease susceptibility would be effective.  Phase 3 involved identification of molecular markers associated with susceptibility to paratuberculosis infection.  We have completed a genomewide scan for quantitative trait loci (QTL) with DNA pools in 3 of our 12 half-sib sire families.  These families were chosen for their large numbers of daughters (252, 570, and 400) and relatively high predicted future daughter disease prevalence (7.2, 8.0, and 9.0%).  The sires were genotyped for a set of 270 microsatellite markers to determine each sire's heterozygosity for each marker.  One sire was heterozygous for 176 markers and the other two were heterozygous for 151 markers.  Correct sire identification was verified with 8 independent, polymorphic markers for which the sires were heterozygous.  Incorrect parentage was found for 15% of the daughters which is similar to the industry average.  Parentage verified daughters were genotyped within family by selective DNA pooling.  Infected daughters (positive pool) were matched with 2 of their non-infected herdmates (negative pool) in the same lactation to control for herd and age effects.  The DNA pools for each sire were genotyped for markers that were heterozygous in the sire.  Nine chromosomal regions (BTA 7, 10, 12, 14, 15, 16, 18, 20, and 25) (P < 0.01) were putatively associated with M. paratuberculosis infection in at least one family.  Three of these regions (BTA 7, 10, and 12) were significantly associated with infection in 2 families.  Interval mapping is in progress to validate significance and refine location of these effects.  Also, a linkage disequilibrium analysis is in progress for the remaining nine sire families.  For this experiment, DNA pools were formed across families and were genotyped on a commercial10K bovine SNP chip which uses molecular inversion probe technology.  Pool genotyping has been completed and data analysis is in progress.
IMPACT: 2000/09 TO 2005/09  The project has assisted more than 300 dairy producers throughout the US to identify the presence or absence of Johne's disease in their herds.  This is the first study of its kind in US Holsteins, the predominant US dairy breed.  We found that 10% of variation among cows for Johne's disease susceptibility is attributable to genetics. Disease prevalence in the most susceptible sire lines is twice the prevalence in the least susceptible lines.  Practically, this knowledge will enable geneticists and producers to select dairy bulls that confer to their offspring decreased susceptibility to Johne's disease.  Scientifically, this work will identify chromosomal regions in cattle with genes that have a major effect on Johne's disease resistance/ susceptibility.  Chromosomal regions significantly associated with susceptibility to M. paratuberculosis infection with our linkage and linkage disequilibrium analyses are good candidates for future fine-mapping studies.  The resource of DNA samples, antibody samples, and disease test results will continue to be exploited for genetic studies of Johne's disease and other diseases.
PUBLICATIONS: 2000/09 TO 2005/09
1. Shook, G. E., M. G. Gonda, B. W. Kirkpatrick, and M. T. Collins. 2004. A search for major genes that cause susceptibility to Johne's disease. Pages 106-111 in Proc. 20th Tech. Conf. Artificial Insemination and Reproduction. Nat'l. Assoc. Anim. Breeders, Columbia, MO.
2. Gonda, M. G., Y. M. Chang, G. E. Shook, M. T. Collins, and B. W. Kirkpatrick. 2005. Effect of Johne's disease status on production, reproduction, and health traits in U. S. Holstein cows. J. Dairy Sci. 88 (Suppl. 1):133. (Abstract).
3. Gonda, M. G., Y. M. Chang, G. E. Shook, M. T. Collins, and B. W. Kirkpatrick. 2005. Genetic variation of Johne's disease susceptibility in U. S. Holstein cattle. J. Dairy Sci. 88 (Suppl. 1):231. (Abstract).
4. Gonda, M.G., G.E. Shook, B.W. Kirkpatrick, and M.T. Collins. 2006. Mapping quantitative trait loci affecting Mycobacterium paratuberculosis infection in cattle. Page 234 in Proceedings Plant and Animal Genome Conference XIV, San Diego, CA. (Abstract).
PROJECT CONTACT:
     Name: Shook, G. E.  Phone: 608-263-3486.  Fax: 608-263-9412
     E
mail: shook@calshp.cals.wisc.edu

 

PROJ TYPE: ANIMAL HEALTH
PROJ STATUS: TERMINATED
START: 01 OCT 2002 TERM: 30 SEP 2003 FY: 2003
INVESTIGATOR: Collins, M. T.
PERFORMING INSTITUTION: Pathobiological Sciences.  Univ of Wisconsin.  Madison, Wisconsin 53706
SUBJECT:  Biosecurity: field evaluation of best management practices.
NON-TECHNICAL SUMMARY: Johne's disease is an infectious disease affecting over 22 percent of U.S. dairy herds and has become a major economic problem.  The purpose of the project is to evaluate the effectiveness of a Johne's disease control program on typical commercial dairy herds of various sizes and management styles that have a moderate to high infection rate.  The control program includes both changes to calf rearing methods and a regular adult cow testing program. OBJECTIVES: 1. Enroll 10 herds with a significant M. paratuberculosis infection rate in the biosecurity field trial.  2. Measure baseline rates of calf morbidity and mortality for all farms.  3. Measure baseline rate of M. paratuberculosis infection in adult cattle (over 2 years old) using two diagnostic tests, fecal culture and ELISA.  4. Institute a biosecurity program aimed at limiting transmission of infectious diseases from cows to calves.  5. Estimate new M. paratuberculosis infection rate using tests for cellular immunity to M. paratuberculosis.
APPROACH: Wisconsin dairy herds in which at least 10% of adult cows test positive for Johne's disease using a commercial ELISA will be enrolled in the biosecurity project.  Baseline infection rates will be established using both the ELISA (blood test for serum antibodies to M. paratuberculosis) and fecal culture using the BACTEC (radiometric) technology.  Baseline calf morbidity and mortality rates will be established using a standardized calf health monitoring instrument for a minimum of a 3 month period.  After baseline parameters are established the biosecurity program will be implemented.  The program has two components; 1) calf rearing systems to limit infectious agent transmission, and 2) a testing program to identify cows of greatest risk of harboring and transmitting M. paratuberculosis.  The program will be implemented after a signed agreement has been obtained that itemizes explicitly the calf management changes expected of the herd owner.  The program is intended to limit spread of multiple infectious diseases but the cause of Johne's disease, M. paratuberculosis, is the pathogen that will be monitored.  New infections with M. paratuberculosis will be measured by assays for cellular immune responses to the agent, skin testing and gamma interferon assay, applied to heifers 8-16 months old, by assays for serum antibodies using commercial ELISA technology, and by fecal culture using BACTEC methods applied to adult cattle over 2 years old.  Program success will be measured by comparing calf health measures and M. paratuberculosis infection rates before and after implementation of the biosecurity program.
PROGRESS: 2002/10 TO 2003/09  Ten Wisconsin dairy herds continued on a Johne's disease program with the assistance provided by the Experiment Station funding.  Herds ranged in size from 70 to 1400 milking cows.  Funding helped the PI to leverage additional support, an amount 4 times that of the Experiment Station grant, to sustain the 7 year project.  In herds with calf health problems, the heifer rearing management recommendations served to improve calf health.  Heifers born under the Johne's control program will enter the herds as milking cows in 2004. This will be the first opportunity to measure the success of the control program.
IMPACT: 2002/10 TO 2003/09  If Johne's control is successful, dairy producers will have an affordable and effective field-tested control program.  If control of this disease is not achieved, then we will have learned that more sensitive diagnostic tests and/or more stringent heifer rearing hygiene is required to control M. paratuberculosis infections in dairy herds.
PUBLICATIONS: 2002/10 TO 2003/09
No publications reported this period
PROJECT CONTACT:
     Name: Collins, M. T.  Phone: 608-262-8457.  Fax: 608-265-6463
     E
mail: mcollin5@wisc.edu

 

PROJ TYPE: ANIMAL HEALTH
PROJ STATUS: NEW
START: 01 OCT 2003 TERM: 30 SEP 2006 FY: 2005
INVESTIGATOR: Czuprynski, C.
PERFORMING INSTITUTION: School of Veterinary Medicine. Univ of Wisconsin. Madison, Wisconsin 53706
SUBJECT:  Effect of macrophage receptors on uptake, phagosomal fusion and intracellular fate of Mycobacterium paratuberculosis.
NON-TECHNICAL SUMMARY: Mycobacterium paratuberculosis is the causative agent of Johne's disease, a chronic progressive enteritis of cattle and other ruminant species that causes considerable economic losses to the dairy and beef cattle farmers of Wisconsin and the nation.  The overall goal of the proposed research is to investigate how activation of surface receptors on bovine macrophages affects the uptake, compartmentalization and fate of Mycobacterium paratuberculosis. OBJECTIVES: Mycobacterium paratuberculosis is the causative agent of Johne's disease, a chronic, progressive enteritis of cattle and other ruminant species.  There is no effective treatment; nor is it likely that an economically acceptable treatment will be developed.  It has been estimated that up to 34 percent of Wisconsin's dairy herds are infected with M. paratuberculosis.  This in turn results in losses due to increased mortality rate, culling and replacement heifer costs, and decreased milk production.  One estimate placed the cost of Johne's disease to the U.S. dairy industry at 200 to 250 million dollars annually.  Efforts to prevent or control Johne's disease in cattle have been stymied by our limited understanding of the pathogenesis of paratuberculosis.  Efforts to improve diagnostic and management techniques are limited by our understanding of how the bacilli enter their preferred niche (i.e. macrophage) and how alterations in this process might influence the course of the infection.  The overall goal of the proposed research is to investigate how activation of surface receptors on bovine macrophages affects the uptake, compartmentalization and intracellular fate of M. paratuberculosis.  The central hypothesis is, that opsonization of M. paratuberculosis with antibody or complement proteins before entry into bovine macrophages, affects maturation of the resulting phagosome and survival of the bacilli.  A second hypothesis is that activation of the P2X7 purinergic receptor enhances apoptotsis in infected macrophages and concomitantly reduces the viability of the bacilli themselves.  There are two specific aims: 1) Compare phagosome maturation in bovine macrophages that ingest IgG-opsonized, complement opsonized or unopsonized M. paratuberculosis; and 2) Determine whether macrophage apoptosis and inactivation of ingested bacilli is affected by ATP activation of the P2X7 purinergic receptor on bovine macrophages.  The proposed work will provide much needed information about the pathogenesis of paratuberculosis, and how the host response to infection might alter the survival of infected macrophages.  Such information could be used to devise new vaccines that elicit an immune response that facilitates ingestion of M. paratuberculosis via a macrophage receptor pathway that enhances anti-mycobacterial activity.  Achieving this long-term goal would `promote the general welfare through the improved health and productivity of domestic livestock which are essential to the Nation's food supply.  In a more general sense, the proposed work will `promote the general welfare through expanded programs of research and extension to improve animal health.' (Section 1429 Title XIV of Public Law 95-113).
APPROACH: In the proposed work we will determine whether prior opsonization with IgG or complement affects the vacuole within which M. paratuberculosis resides in bovine macrophages.  Experiments will be performed using a bovine macrophage cell line that exhibits many characteristics of normal macrophages.  We will compare our results with those obtained using bovine peripheral blood monocytes, or monocytes cultured in vitro until they acquire the characteristics of macrophages.  Uptake of bacilli will be quantified by microscopic (acid-fast staining) and radiometric (Bactec) methods.  To assess the ability of Fc receptors to facilitate macrophage ingestion of M. paratuberculosis, we will pre-incubate M. paratuberculosis with serum from cattle that are positive for anti-M. paratuberculosis antibodies using a commercial ELISA assay, as described previously.  These sera will be generously provided by my colleague Dr. M. Collins, whose Johne's Testing Center has a large bank of sera obtained from experimental and field studies of M. paratuberculosis.  The role of complement receptors in facilitating macrophage ingestion of M. paratuberculosis will be determined by comparing uptake of bacilli pre-incubated with heat-inactivated (56 C for 1 hr) and untreated bovine sera (from ELISA negative uninfected cattle).  During the initial stages of the infection it is likely the bacilli interact with macrophages in the absence of significant levels of immunoglobulin nor complement.  Thus, other macrophage receptors are likely to be involved in adherence and ingestion of M. paratuberculosis.  Although several receptors could be involved (e.g. scavenger receptors and others) published evidence suggests that mannose receptors provide an additional pathway for ingestion of mycobacteria by macrophages.  To assess the effects of mannose receptor mediated uptake of M. paratuberculosis, macrophages will be preincubated with mannosylated BSA and ingestion of bacilli allowed to occur in the presence of the same (no serum present) as described previously.  Fusion of lysosomal granules with M. paratuberculosis containing phagosomes will be evaluated by dual staining with fluorescent probes.  The production of reactive oxygen intermediates by macrophages that have ingested M. paratuberculosis via the receptor mediated pathways of interest, will be assessed by quantifying release of hydrogen peroxide and superoxide anion into the culture medium.  Release of nitrogen intermediates by macrophages, following ingestion of M. paratuberculosis, will be assessed using the Greiss reagent, as described previously.  We will examine what effect P2X7 receptor stimulation has on the fate of M. paratuberculosis in bovine macrophages by incubating infected macrophages with P2X7 agonists or antagonists.  Macrophage apoptosis will be evaluated by staining with Hoechst 33342, TUNEL staining and by caspase-3 activation as described previously. In these same experiments, we will estimate the numbers of intracellular M. paratuberculosis by lysing the infected monolayers and quantifying the bacilli by the Bactec radiometric method. PROGRESS: 2005/01 TO 2005/12  Mycobacterium paratuberculosis is the causative agent of Johne’s disease, a chronic, progressive enteritis of cattle and other ruminant species.  Efforts to improve diagnostic and management techniques are limited by our understanding of how the bacilli enter their preferred niche (i.e. macrophage) and how alterations in this process might influence the course of the infection.  The overall goal of the proposed research is to investigate how activation of surface receptors on bovine macrophages affects the uptake, compartmentalization and intracellular fate of M. paratuberculosis.  The central hypothesis is, that opsonization of M. paratuberculosis with antibody or complement proteins before entry into bovine macrophages, affects maturation of the resulting phagosome and survival of the bacilli.  We have found that M. paratuberculosis is readily ingested by bovine monocytes, but ingestion by a viral-transformed bovine macrophage cell line is much slower and more limited.  Opsonization of the bacilli with serum increases uptake by monocytes and to a lesser extent by the macrophage cell line, although it does not correct the defect in ingestion by the latter.  Opsonization does not appear to substantially alter the intracellular survival of the bacilli in monocytes or the macrophage cell line.  Intracellular survival of bacilli in monocytes is biphasic, with an initial small increase in numbers followed by a decline in estimated numbers of bacilli using a radiometric method.  The numbers of intracellular bacilli in the cell line are more stable over time.  The effects of several cytokines on the ingestion and intracellular survival of M. paratuberculosis has been investigated.  The results suggest that inhibition of IL-1 release by addition of pentoxifylline increases the intracellular survival of the bacilli.  Likewise addition of an anti-IL-1 antibody or an IL-1 receptor antagonist increased the number of bacilli.  Similarly, pretreatment of monocytes with recombinant IL-1 inhibits intracellular survival.  Infected monocytes also release ATP.  Inhibition of P2 nucleotide receptors has little effect on intracellular survival of M. paratuberculosis, but stimulation of P2 receptors with benzyl ATP or high concentrations of ATP increases monocyte apoptosis and decreases survival of bacilli.
IMPACT: 2005/01 TO 2005/12  This study will provide needed information about the role of macrophages receptors in the pathogenesis of paratuberculosis.  The results suggest that the receptor pathway by which the bacilli enter the macrophage can affect the numbers of bacilli that do so. Stimulation of certain cytokine or nucleotide receptors are likely to affect the fate of the bacilli.  Such information could be used to devise new vaccines that elicit an immune response that facilitates ingestion of M. paratuberculosis via a macrophage receptor pathway that enhances anti-mycobacterial activity.
PUBLICATIONS: 2005/01 TO 2005/12
Woo, S.R., J. Sotos, A.P. Hart, R. G. Barletta, and C.J. Czuprynski. 2006. Bovine monocytes and a macrophage cell line differ in their ability to phagocytose and support the intracellular survival of Mycobacterium avium subsp. paratuberculosis. Vet. Immunol. Immunopathol. 110:109-120.
PROJECT CONTACT:
     Name: Czuprynski, C.  Phone: 608-262-8102.  Fax: 608-262-8102

 

PROJ TYPE: ANIMAL HEALTH
PROJ STATUS: TERMINATED
START: 01 OCT 2003 TERM: 30 SEP 2005 FY: 2005
INVESTIGATOR: Talaat, A. M.
PERFORMING INSTITUTION: Animal Health & Biomedical Science.  Univ of Wisconsin.  Madison, Wisconsin 53706
SUBJECT:  Genetic analysis of the virulence of Mycobacterium avium subspecies paratuberculosis.
NON-TECHNICAL SUMMARY: A) Infection with Mycobacterium avium subspecies paratuberculosis (MAP), the causative agent of Johne's disease (Paratuberculosis) causes severe economic losses estimated to be around $200-$250 million a year for the dairy industry in the USA alone.  B) Currently, no feasible antibiotic regimen or protective vaccine is approved to combat Johne's disease.  A) This project will develop molecular tools necessary to better understand the disease process.  B) It will also generate candidates for vaccine development.
OBJECTIVES: We will investigate the molecular pathogenesis of Mycobacterium avium subsp. paratuberculosis (MAP) using genome-wide approaches that were developed recently.  In this proposal, we will use transposable elements to generate a random insertional mutant library that could be screened for potential virulence factors or protective vaccine candidates.
APPROACH: Specifically, the library of MAP mutants will be characterized by Southern hybridization (to ensure randomness), sequencing (to identify the disrupted genes) as well as identification of nutritional auxotrophs.  Verified auxotrophs will be further studied in the mouse model of paratuberculosis to assess their virulence.  In future experiments, we will use the DNA microarrays technology to dissect the genetic basis of MAP colonization/invasion into the host cells. PROGRESS: 2003/10 TO 2005/09  Johne’s disease, caused by Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis) infection, is a worldwide problem for the dairy industry and has a possible involvement in Crohn’s disease in humans.  To identify virulence determinants of this economically important pathogen, a library of 5,060 transposon mutants was constructed using Tn5367 insertion mutagenesis, followed by large-scale sequencing to identify disrupted genes.  During this project, 1,150 mutants were analyzed and 970 unique insertion sites were identified.  Sequence analysis of the disrupted genes indicated that the insertion of Tn5367 was more prevalent in genomic regions with lower G+C content (50.5 to 60.5%) than the average G+C content (69.2%) of the rest of the genome.  Phenotypic screening of the library identified disruptions of genes involved in iron, tryptophan or mycolic acid metabolic pathways that displayed unique growth characteristics.  Bioinformatic analysis of disrupted genes identified a list of potential virulence determinants for further testing in animals.  Mouse infection studies showed a significant decrease in tissue colonization by mutants with a disruption in gcpE, pstA, kdpC, papA2, impA, umaA1 or fabG2 2 genes.  Attenuation phenotypes were time-specific (e.g. gcpE, kdpC) as well as tissue-specific (e.g. impA, papA2), suggesting that those genes may be involved in different virulence mechanisms.  The identified potential virulence determinants represent novel functional classes that could be necessary for mycobacterial survival during infection and could provide suitable targets for vaccine and drug developments against Johne’s and Crohn’s diseases.
IMPACT: 2003/10 TO 2005/09  During this project, we generated specific mutants that could be the next generation of vaccines against Johne’s Disease. We also identified several virulence factors that were not known before.
PUBLICATIONS: 2003/10 TO 2005/09
1. Talaat, A.M., Stemke-Hale, K. 2005. Expression Library Immunization: A road-map for vaccine discovery against infectious diseases. Infect. Immun. 73, 7089-7098.
2. Shin, S-J., Wu, C-W., Steinberg, H., Talaat, A.M. 2006. Identification of novel virulence determinants in Mycobacterium avium subspecies paratuberculosis using large-scale screening of an Insertional Mutant Library. (Submitted).
PROJECT CONTACT:
     Name: Talaat, A. M.  Phone: 608-262-2617
     E
mail: atalaat@wisc.edu

 

PROJ TYPE: ANIMAL HEALTH
PROJ STATUS: TERMINATED
START: 01 DEC 2003 TERM: 30 SEP 2004 FY: 2004
INVESTIGATOR: Collins, M. T.
PERFORMING INSTITUTION: School of Veterinary Medicine.  Univ of Wisconsin.  Madison, Wisconsin 53706
SUBJECT:  Induction of diagnostically valuable Mycobacterium paratuberculosis protein antigens.
NON-TECHNICAL SUMMARY: Johne's disease is economically important to a wide variety of ruminants of agricultural importance and blood tests to diagnosis this infection are not sufficiently accurate.  This study is designed to understand the proteins that make up the bacterium causing Johne's disease in order to design more accurate blood tests.
OBJECTIVES: General objective: Based on the novel findings from our previously funded work, we will define the spectrum of proteins expressed by Mptb using 2-dimensional electrophoresis (2-DE).  We will identify those proteins most reactive with sera from M. paratuberculosis-infected cattle that are not bound by negative control sera to significantly improve a serological test for paratuberculosis.  Specific objectives: 1. Create for the first time a 2-DE protein profile for M. paratuberculosis necessary to assess antigens of immunodiagnostic relevance.  2. Screen the proteins with sera from 50 cattle infected with M. paratuberculosis and 50 cattle free of infection to reveal those proteins directly contributing to diagnostic sensitivity and specificity.  3. Produce a semi-purified protein preparation(s) for use as solid- phase M. paratuberculosis antigens and cross-reactive absorption antigens.  4. Employ these proteins in an ELISA and validate its performance (with and without serum absorption using cross-reactive antigens) using a panel of 4,000 sera from cattle of well-defined M. paratuberculosis infection status.
APPROACH: Stage #1 2-DE immunoblot analysis of 4 antigenic preparations from two bovine strains of Mptb will be done using sera pooled from 50 infected or noninfected cattle.  Proteins that stain strongly using pooled serum from cases but not at all or far less strongly with serum from controls will be considered proteins of potentially high diagnostic specificity.  Stage #2 By 2-DE immunoblot sera from 50 fecal culture-positive and 50 fecal culture-negative cattle will establish the percentage of cattle responding to Mptb-specific proteins.  The Kodak immunoblotting system allows screening of serum from up to 10 cattle using a single 2-DE gel.  The frequency and intensity of each spot will be calculated.  Proteins showing the best infection category discrimination potential will be evaluated for analytical specificity.  Stage #3 Mycobacteria commonly found in cattle and those believed to trigger false-positive commercial ELISAs will be studied using the same methods as for Mptb.  Proteins will be separated using 2-DE.  Pooled sera from cases and controls will be used.  Internal markers added to the antigen preparations will permit alignment of the gels allowing us to identify the proteins in these other mycobacteria that are similar to those of Mptb.  If the candidate Mptb proteins are not in the same 2-DE gel location as immunostained proteins of other mycobacteria, then we will presume that the Mptb proteins have good analytical specificity.  When we confirm that immunogenic proteins with good diagnostic sensitivity are unique to Mptb, we will proceed to identify them by Matrix-Assisted Laser Desorption/Ionization Mass Spectrophotometry.  Stage #4 The protein or proteins of interest will be excised from wet 2-DE gels and analyzed by MALDI-MS.  The data from these assays will be compared to available databases to determine if the amino acid sequence of the protein matches that of any known protein or is novel.  Many mycobacterial proteins have been identified and catalogued in public databases.  Stage #5 We will seek to create a protein fraction from Mptb, not to isolate single proteins since this has already been done and the result predictably was assays of low sensitivity.  The location of proteins of interest in 2-DE will reveal their molecular weight range and pI.  Classical chromatography methods, molecular sieve and ion exchange, will be used to create protein fractions from Mptb that are enriched in the proteins of greatest diagnostic value and depleted of those most cross-reactive with other mycobacteria.  Stage #6 The ELISA will be optimized and tested with 500 sera from cattle of known Mptb fecal culture status and over 500 sera from certified paratuberculosis-free herds.  All 4,000 sera will be tested using the improved ELISA.  OD values for cases (infected) and controls (certified-free) will be evaluated using likelihood ratio methods.
PROGRESS: 2003/12 TO 2004/09  The first ever two-dimensional electrophoresis (proteomic) analysis of Mycobacterium paratuberculosis was created.  Culture medium composition and pH were found to significantly influence the protein expression profile.  Certain proteins were found associated with heat resistance of the organism.  More proteins from culture filtrates were immunogenic (based on induction of serum antibodies in dairy cattle) than were proteins from the cells harvested from cultures.  The antibody response of cattle to the secreted proteins of M. paratuberculosis was highly variable with regard to the number and type of protein antigens recognized.  Twenty-three immunogenic proteins were identified by MALDI-MS.  Of these, 13 were cloned and expressed in E. coli and purified in large amounts.  These proteins are being evaluated for their diagnostic potential.
IMPACT: 2003/12 TO 2004/09  The full protein antigenic profile of Mycobacterium paratuberculosis, the cause of Johne's disease, was analyzed for the first time.  Key antigens that trigger antibody response in dairy cattle were cloned and purified.  These antigens are not ready for development into improved, low-cost, high-throughput diagnostic assays.
PUBLICATIONS: 2003/12 TO 2004/09
1. Sung, N.*, K. Takayama, and M.T. Collins. 2004. Possible association of GroES and antigen 85 proteins with heat resistance of Mycobacterium paratuberculosis. Appl. Environ. Microbiol. 70:1688-1697.
2. Sung, N.*, and M.T. Collins. 2003. Variation in resistance of Mycobacterium paratuberculosis to acid environments as a function of culture medium. Appl. Env. Microbiol. 69:6833-3840.
3. Collins, M.T. 2002. Interpretation of a commercial bovine paratuberculosis enzyme-linked immunosorbent assay by using likelihood ratios. Clin. Diagn. Lab. Immunol. 9:1367-1371.
4. Gardner, I.A., H. Stryhn, P. Lind, and M.T. Collins. 2000. Conditional dependence between tests affects the diagnosis and surveillance of diseases. Prev. Vet. Med. 45:107-122. 23.
PROJECT CONTACT:
     Name: Collins, M. T.  Phone: 608-262-8457.  Fax: 608-265-1958
     E
mail: mcollin5@facstaff.wisc.edu

 

PROJ TYPE: NRI COMPETITIVE GRANT
PROJ STATUS: EXTENDED
CONTRACT/GRANT/AGREEMENT NO: 2004-35204-14209 PROPOSAL NO: 2003-02230
START: 01 JAN 2004 TERM: 31 DEC 2006 FY: 2005 GRANT YR: 2004 GRANT AMT: $220,000
INVESTIGATOR: Talaat, A.
PERFORMING INSTITUTION: Animal Health & Biomedical Science.  Univ of Wisconsin.  Madison, Wisconsin 53706
SUBJECT:  Persistence and virulence of Mycobacterium paratuberculosis during infection: a functional genomics approach.
NON-TECHNICAL SUMMARY: Johne’s disease in cattle causes severe economic losses for the dairy industry in the USA.  No current vaccine is available to reverse this trend.  We will use novel approaches to better understand how bacteria establish itself in animals.  This research will provide new leads for developing vaccines and diagnostics desperately needed to control Johne’s disease. OBJECTIVES: Johne’s disease in cattle (infection with Mycobacterium avium subspecies paratuberculosis) causes severe economic losses for the dairy industry in the USA.  Identifying gene regulatory networks responsible for establishing chronic infection is a key step in understanding the nature of the host-pathogen interactions in Johne’s disease.  Toward this end, we will use a functional genomic approach to analyze the gene expression profile of M. a. paratuberculosis (MAP) during murine infection.  The ultimate goal of this study is to identify mycobacterial genes actively expressed during infection, on a genome-wide level to better understand the molecular pathogenesis of Johne’s disease.
APPROACH: To achieve our goal, we will employ DNA microarrays and the mouse model of paratuberculosis to: I)Identify variations among several isolates of M. avium subspecies paratuberculosis (MAP) and subspecies avium (MAV) on both genome and transcriptome levels, and; II)Identify genes actively expressed during the infection of MAP in both bcgs (BALB/c) and bcgr (DBA/2) mouse models of paratuberculosis to identify genes responsible for the persistence of MAP.
PROGRESS: 2005/01 TO 2005/12  Infection with Mycobacterium avium subsp. paratuberculosis (M. paratuberculosis) causes Johne’s disease in cattle and is also implicated in cases of Crohn’s disease in humans.  Another closely related strain, M. avium subsp. avium (M. avium) is a health problem for immunocompromised patients.  To understand the molecular pathogenesis of M. avium subspecies, we analyzed the genome contents of isolates collected from humans and domesticated or wildlife animals.  Comparative genomic hybridizations indicated distinct lineages for each subspecies where the closest genomic relatedness existed between M. paratuberculosis isolates collected from human and clinical cow samples.  Genomic islands (N=24) comprising 846 Kb were present in the reference M. avium strain but absent from 95% of M. paratuberculosis isolates.  Additional analysis identified a group of 18 M. paratuberculosis-associated islands comprising 240 Kb that were absent from most of the M. avium isolates.  Sequence analysis of DNA regions flanking the genomic islands identified three large-size inversions in addition to several small inversions that could play a role in regulation of gene expression.  Analysis of genes encoded in the genomic islands reveals factors that are probably important for various mechanisms of virulence.  Overall, M. avium isolates displayed a higher level of genomic diversity than M. paratuberculosis isolates.  Among M. paratuberculosis isolates, those from wildlife animals displayed the highest level of genomic rearrangements that were not observed in other isolates.  The presented findings will affect the future design of diagnostics and vaccines for Johne’s and Crohn’s diseases and provide a model for genomic analysis of closely related bacteria.
IMPACT: 2005/01 TO 2005/12  So far, we identified several regions of difference between the genome of the pathogenic M. paratuberculosis and the less virulent strain of M. avium.  These regions can be further exploited to develop accurate diagnostic tests.
PUBLICATIONS: 2005/01 TO 2005/12
1. Talaat, A.M., Stemke-Hale, K. 2005, Expression Library Immunization: A road-map for vaccine discovery against infectious diseases. Infect. Immun. 73, 7089-7098.
2. Wu, C-W, Glasner, J., Collins, M.T., Naser, S., Talaat, A.M. 2006, Whole genome plasticity among Mycobacterium avium subspecies: insights from comparative genomic hybridizations J. Bacteriol. 188, 711-723.
PROJECT CONTACT:
     Name: Talaat, A. M.  Phone: 608-262-2861.  Fax: 608-262-7420
     E
mail: atalaat@wisc.edu

 

PROJ TYPE: STATE
PROJ STATUS: TERMINATED
START: 01 JUL 2001 TERM: 30 JUN 2003 FY: 2003
INVESTIGATOR: Collins, M. T.; Kelm, S. C.; Baumann, L. E.
PERFORMING INSTITUTION: School of Veterinary Medicine. Univ of Wisconsin.  Madison, Wisconsin 53706
SUBJECT:  Johne's disease prevalence in a dairy breed compared with the Holstein breed.
NON-TECHNICAL SUMMARY: Johne's disease is an infectious gastro-intestinal disorder that affects dairy cattle worldwide.  This project examines the prevalence of this disorder in dairy cattle breeds other than Holsteins in an effort to determine if certain breeds are more resistant to Johne's disease than Holsteins.  Approximately 85% of all dairy cattle in the US are from the Holstein breed. OBJECTIVES: To measure the prevalence of Johne's disease in a protein breed of dairy cattle, such as Brown Swiss, and compare the prevalence rate within the protein breed to the prevalence rate for Holsteins housed within the same herd.
APPROACH: To measure the level of Johne's disease in a protein breed compared with Holsteins we will select dairy farms with the two breeds of dairy cattle in the same herd and under the same management system.  According to Wisconsin DHI data, Jerseys, Guernseys, and Brown Swiss are the most abundant dairy breeds in Wisconsin after Holsteins.  Within a herd we will select a protein breed cow and match it with a birth cohort (born within 3-6 months) Holstein cow.  We will need at least 20 matched pairs within each herd and will collect data on more matched pairs if they are available.  The Wisconsin DHI records indicate that there are 20 Jerseys/Holstein herds, 15 Guernseys/Holstein herds, and 20 Brown Swiss/Holstein herds that meet the above criteria.  We will recruit at least 20 herds from the DHI population for this study.  Initial preference will be given to Brown Swiss, because of anecdotal evidence from the field suggesting more resistance in this protein breed, but final selection of the protein breed will depend upon the number of farms willing to cooperate in the study.  Johne's disease will be evaluated using the ELISA blood test and a fecal culture using the radiometric (BACTEC) method.  When these two tests are used in combination, the sensitivity and specificity of classification is 69% and 99.5% respectively, which is better than either test used individually.  Comparisons of the Johne's disease prevalence between the breeds within each herd will be done using a paired t-test analysis.  Analysis of the Johne's disease between matched pairs will be analyzed using 2x2 tables and the Mantel-Haenszel Procedure for estimating the Relative Risk and Odds Ratio.  The results will be published in the Journal of Dairy Science.  Whole blood samples will also be collected from each cow.  The leucocytes will be harvested and stored for future DNA extraction.  If the results of this study show a significant difference between breeds, future studies will use these samples to investigate potential genetic markers for Johne's disease resistance.
PROGRESS: 2001/07 TO 2003/06  A total of 17 dairy herds participated.  Criteria for herd participation included maintenance of both Brown Swiss and Holstein breeds within the lactating herd.  Birth cohorts were sampled: Brown Swiss and Holstein animals born within a 90-day window.  Two tests for Johne’s disease were done on each animal: serum ELISA and fecal culture (BACTEC).  Samples were collected from a total of 836 cows.  Brown Swiss and Holstein breeds were represented by 42% and 58% of the samples, respectively.  Results have been summarized from the first 10 herds sampled.  These results are based upon 203 Brown Swiss cows and 279 Holstein cows.  Based upon ELISA and fecal culture results, Johne’s disease incidence was lower in the Brown Swiss breed than in the Holstein breed.  Results from the ELISA may be grouped as negative, suspect, and positive.  Only 4 Brown Swiss cows were ELISA positive for Johne’s Disease (2% of Brown Swiss cows sampled).  A total of 18 cows (8.9%) were classified as suspect and the remaining 181 cows (89.1%) were classified as negative.  A total of 14 Holstein cows were ELISA positive (6.5%), 64 were classified as suspect (22.9%), and 201 samples were classified as negative.  Fecal culture results are classified as positive or negative.  Contamination of fecal cultures with molds and other microorganisms posed a significant problem for the research. As a result, duplicate fecal cultures were completed for each cow.  No Brown Swiss fecal samples were positive for Johne’s disease and 4 Holstein fecal samples were positive.  Work to be completed on the project includes summarization of remaining results (7 herds, 354 samples), statistical analysis of the raw data, and publication of project findings.
IMPACT: 2001/07 TO 2003/06  Reports of Johne’s Disease prevalence in the US have been limited principally to the Holstein breed.  This particular work provides an estimate of the disease prevalence within a second major dairy breed and, potentially more importantly, points to a breed that may have a genetic predisposition to greater resistance to the disease.  The Brown Swiss breed may serve as an appropriate resource for investigation into the molecular basis for disease resistance. At the farm level, Brown Swiss may represent an option for farms that wish to reduce herd incidence of Johne’s Disease, either via crossbreeding programs or purchase of purebred animals.
PUBLICATIONS: 2001/07 TO 2003/06
No publications reported this period
PROJECT CONTACT:
     Name: Collins, M. T.  Phone: 608-262-8457.  Fax: 608-265-1958
     E
mail: mcollin5@facstaff.wisc.edu

 

PROJ TYPE: STATE
PROJ STATUS: TERMINATED
START: 01 JUL 2003 TERM: 30 JUN 2005 FY: 2005
INVESTIGATOR: Collins, M.; Kelm, S.; Baumann, L.
PERFORMING INSTITUTION: School of Veterinary Medicine.  Univ of Wisconsin.  Madison, Wisconsin 53706
SUBJECT:  Evaluating stage of lactation and pooled sample effects for Johne's tests utilizing fecal culture. 
NON-TECHNICAL SUMMARY: Johne's disease affects a majority of Wisconsin dairy herds. Diagnosis of Johne's disease is difficult.  This study evaluates to improve the ability to detect cows with Johne's disease by using composite samples from cows and timing sample collection based on stage of lacation.
OBJECTIVES: #1 Determine if stage of lactation influences the sensitivity of tests based on fecal culture. #2 Determine if a pooled fecal sample, based on fecal samples collected over 5 consecutive days from an individual cow, will provide greater sensitivity than a single sample. #3 Enhance our current understanding of S/P ratios for interpretation of serum ELISA results.
APPROACH: Blood and fecal samples will be collected from 100 serum ELISA-positive cows that are in their second or higher lactation and reside in western Wisconsin dairy herds known to have Johne's disease.  Samples will be collected at 4 different periods during the lacation cycle: dry-period, 30-60 days in milk (DIM), 120-180 DIM, and 210-270 DIM.  Fecal samples (3 gm) will be collected on the same day as the blood sample (day 1) and also on the next 4 consecutive days.  Two fecal cultures will be completed for each cow at each sampling time.  The first fecal culture will be done on the day 1 sample.  The second culture will be done on a pooled sample comprised of equal amounts of feces from each of the 5 collection days.  BACTEC methods will be used to culture all fecal samples.  Single versus pooled fecal culture results will be analyzed using 2x2 contingency tables to test for congruent and incongruent results.  Stage of lactation results will be evaluated using analysis of variance within a model that includes, but is not limited to, effects of year of the study (1 or 2), type of fecal sample (individual or pooled), parity, and stage of lactation.
PROGRESS: 2003/07 TO 2005/06  Cows from within commercial herds in NW Wisconsin were utilized for the study.  Sampling began in 2004 and has been completed. We experienced some difficulty in attaining sufficient cow numbers, as several candidate herds in the area have stopped testing for Johne’s disease.  We have been working with area veterinarians to identify additional herds to help with cow numbers.  Approximately 75 cows have been sampled within the project from five cooperating farms.  We continue working with additional herds to attain our goal of 100 cows sampled.  Cows that have tested positive for Johne’s disease previously are used for the study.  Animals selected for the study were sampled a maximum of four times a year.  Within each sample period for each cow, a blood sample was collected for serum ELISA testing and fecal samples were collected for 5 consecutive days.  Three separate fecal cultures were run for each animal within a period, one based upon fecal sample taken on a single day, a second based on a composite sample from 3 days, and the third based upon a sample that represents a composite of the 5 consecutive daily samples.  Culture results on the last samples collected are still pending.
IMPACT: 2003/07 TO 2005/06  Johne’s disease represents a significant economic cost to dairy farms in the Midwest.  Accurate identification of infected animals is required for appropriate on-farm control.  The results of this research may be able to enhance the identification of infected animals via strategic use of currently available diagnostic tests.
PUBLICATIONS: 2003/07 TO 2005/06
No publications reported this period
PROJECT CONTACT:
     Name: Collins, M.  Phone: 608-263-9801.  Fax: 608-265-6748
     E
mail: mcollin5@wisc.edu

Return to Contents



USDA logo ARS logo NAL logo
The Animal Welfare Information Center, Contact AWIC
http://www.nal.usda.gov/awic/pubs/johnes/johnes2.htm
October 16, 2006