JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
RESEARCH SUPPORT, U.S. GOV'T, P.H.S.
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Use of the polymerase chain reaction to study arthritis due to Neisseria gonorrhoeae.

OBJECTIVE: To explore the utility of the polymerase chain reaction (PCR) in the diagnosis, management, and investigation of arthritis due to Neisseria gonorrhoeae.

METHODS: The PCR was used to detect DNA from N gonorrhoeae in model systems and in extracts of synovial fluid (SF) from patients with systemic gonococcal infections and objective evidence of arthritis.

RESULTS: One N gonorrhoeae organism or its equivalent was detectable in human SF from inflamed joints. Five of 8 patients with systemic N gonorrhoeae infection and arthritis had N gonorrhoeae DNA demonstrated by PCR in at least 1 pretreatment SF specimen that was N gonorrhoeae culture positive. Thirty-seven of 38 control specimens were negative, the exception probably being due to cross-contamination from a positive specimen. All specimens that were positive for N gonorrhoeae by other methods were also positive by PCR. Two others were positive by PCR but negative by other methods. Four pretreatment specimens were negative by all methods, including PCR. This suggests that, for these patients, negative cultures reflected true absence of N gonorrhoeae, and not the presence of unculturable organisms. This group also had a significantly shorter duration of disease than did the patients with N gonorrhoeae DNA found in their SF. All patients had a prompt response to antibiotic treatment. Two of 3 patients whose specimens were previously positive showed marked decreases in SF N gonorrhoeae DNA after treatment.

CONCLUSION: The PCR using these or similar oligonucleotide primers can be a useful adjunct in the diagnosis of gonococcal arthritis and can be of value in assessing its response to therapy. In some N gonorrhoeae-associated arthritides, there appears to be a lack of both viable and nonviable N gonorrhoeae organisms in the SF. These observations may have implications regarding the pathogenesis of this form of arthritis.

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