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The emergence of Neisseria gonorrhoeae with decreased susceptibility to Azithromycin in Kansas City, Missouri, 1999 to 2000.
Sexually Transmitted Diseases 2004;31(2):73-78.
McLean CA, Wang SA, Hoff GL, Dennis LY, Trees DL, Knapp JS,
Markowitz LE, Levine WC.
Abstract
BACKGROUND AND OBJECTIVES: We describe the first cluster of persons with Neisseria
gonorrhoeae with decreased susceptibility to azithromycin (AziDS; minimum
inhibitory concentration >/=1.0 microg/mL) in the United States.GOAL The
goal of this study was to identify risk factors for AziDS N. gonorrhoeae
and to describe isolate microbiology. STUDY DESIGN: Persons with AziDS N.
gonorrhoeae (cases) were identified in Kansas City, Missouri, through the
Gonococcal Isolate Surveillance Project (GISP) in 1999 and expanded surveillance,
January 2000 to June 2001. A case-control study using 1999 GISP participants
was conducted; control subjects had azithromycin-susceptible N. gonorrhoeae.
RESULTS: Thirty-three persons with AziDS N. gonorrhoeae were identified.
Case patients were older than control patients (median age, 33 years vs.
23 years; P <0.001). Fifty percent of cases and 13% of control subjects
had a history of sex with a female commercial sex worker (odds ratio, 7.0;
95% confidence interval, 1.3-36.0); 50% of cases and 4% of control subjects
met sex partners on street A (P <0.01). AziDS N. gonorrhoeae isolates
were phenotypically and genotypically similar and contained an mtrR gene
mutation. CONCLUSIONS: With few treatment options remaining, surveillance
for antimicrobial-resistant N. gonorrhoeae is increasingly important, especially
among persons at high risk.