Objective: To study the prevalence of Trichomonas vaginalis(TV) infection in Chinese male patients with nongonococcal urethritis (NGU), to evaluate the sensitivity and specificity of urine-based and urethral swab poly...Objective: To study the prevalence of Trichomonas vaginalis(TV) infection in Chinese male patients with nongonococcal urethritis (NGU), to evaluate the sensitivity and specificity of urine-based and urethral swab polymerase chain reaction(PCR) detection, to set up a method for non-invasive detection of male TV infection. Method: One hundred and five male NGU patients were selected from a Beijing STD clinic. Two urethral swabs were obtained from each patient, one for the InPouch TV culturesystem and the other for PCR. In addition, one first void urinespecimen was collected for PCR detection. Culture wasconsidered the “gold standard”. The sensitivity, specificity,positive predictive value (PPV) and negative predictive value(NPV) of the two PCR detections were compared to cultureresults. Results: The prevalence of urine-based PCR and urethralswab PCR detection was 3.81% (4/105) and 4.76% (5/105)respectively. Compared to culture, the sensitivity, specificity,PPV and NPV were 80%, 100%, 100% and 99% for urine-based PCR and 80%, 99%, 80% and 99% for urethral swabPCR. Conclusion: TV is one of the etiological agents in male NGU,with a 4.76% prevalence of infection in our study. The urinebased PCR detection has higher sensitivity and specificity and provides a noninvasive method more feasible in practice.展开更多
文摘Objective: To study the prevalence of Trichomonas vaginalis(TV) infection in Chinese male patients with nongonococcal urethritis (NGU), to evaluate the sensitivity and specificity of urine-based and urethral swab polymerase chain reaction(PCR) detection, to set up a method for non-invasive detection of male TV infection. Method: One hundred and five male NGU patients were selected from a Beijing STD clinic. Two urethral swabs were obtained from each patient, one for the InPouch TV culturesystem and the other for PCR. In addition, one first void urinespecimen was collected for PCR detection. Culture wasconsidered the “gold standard”. The sensitivity, specificity,positive predictive value (PPV) and negative predictive value(NPV) of the two PCR detections were compared to cultureresults. Results: The prevalence of urine-based PCR and urethralswab PCR detection was 3.81% (4/105) and 4.76% (5/105)respectively. Compared to culture, the sensitivity, specificity,PPV and NPV were 80%, 100%, 100% and 99% for urine-based PCR and 80%, 99%, 80% and 99% for urethral swabPCR. Conclusion: TV is one of the etiological agents in male NGU,with a 4.76% prevalence of infection in our study. The urinebased PCR detection has higher sensitivity and specificity and provides a noninvasive method more feasible in practice.