CDCHAN-00281-2009-04-25-ADV-N
Investigation
and Interim Recommendations: Swine Influenza (H1N1)
CDC, in collaboration with public health
officials in
The viruses contain a unique
combination of gene segments that have not been reported previously among swine
or human influenza viruses in the
CDC has also been working closely
with public health officials in
Clinicians should consider swine
influenza infection in the differential diagnosis of patients with febrile
respiratory illness and who 1) live in San Diego or Imperial counties,
California, or Guadalupe County, Texas, or traveled to these counties or 2) who
traveled recently to Mexico or were in contact with persons who had febrile
respiratory illness and were in one of the three U.S. counties or Mexico during
the 7 days preceding their illness onset.
Patients who meet these criteria
should be tested for influenza, and specimens positive
for influenza should be sent to public health laboratories for further
characterization. Clinicians who suspect swine influenza virus infections in
humans should obtain a nasopharyngeal swab from the patient, place the swab in
a viral transport medium, refrigerate the specimen, and then contact their
state or local health department to facilitate transport and timely diagnosis
at a state public health laboratory. CDC requests that state public health
laboratories promptly send all influenza A specimens
that cannot be subtyped to the CDC, Influenza
Division, Virus Surveillance and Diagnostics Branch Laboratory.
Persons with febrile respiratory
illness should stay home from work or school to avoid spreading infections
(including influenza and other respiratory illnesses) to others in their
communities. In addition, frequent hand washing can lessen the spread of
respiratory illness.
CDC has not recommended that people
avoid travel to affected areas at this time. Recommendations found at http://wwwn.cdc.gov/travel/contentSwineFluUS.aspx
will help travelers reduce risk of infection and stay healthy.
Clinical guidance on laboratory
safety, case definitions, infection control and information for the public are
available at:http://www.cdc.gov/swineflu/investigation.htm.
·
Swine
Influenza A (H1N1) Virus Biosafety Guidelines for
Laboratory Workers: http://www.cdc.gov/swineflu/guidelines_labworkers.htm
·
Interim
Guidance for Infection Control for Care of Patients with Confirmed or Suspected
Swine Influenza A (H1N1) Virus Infection in a Healthcare Setting: http://www.cdc.gov/swineflu/guidelines_infection_control.htm
·
Interim
Guidance on Case Definitions for Swine Influenza A (H1N1) Human Case
Investigations: http://www.cdc.gov/swineflu/casedef_swineflu.htm
Morbidity and Mortality Weekly
Reports Dispatch (April 24) provide detailed information about the initial cases at http://www.cdc.gov/mmwr/preview/mmwrhtml/mm58d0424a1.htm
For more information about swine
flu: http://www.cdc.gov/swineflu
Additional information is also
available by calling 1-800-CDC-INFO (1-800-232-4636)
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- Info Service: Provides general information that is not necessarily considered to be of an emergent nature. Example: HAN00319
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