Risk Assessment and Laboratory Diagnosis of Trichomoniasis in Men

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Abstract
Control of Trichomonas vaginalis is assuming higher priority because recent studies have suggested that trichomoniasis enhances susceptibility to human immunodeficiency virus infection and the risk for delivery oflow-birth weight infants. In a cross-sectional study, 50 cases were identified among 447 men attending a sexually transmitted disease clinic. As previously reported; trichomoniasis was associated with nonchlamydial nongonococcal urethritis. Other risk factors included sexual contact with an infected woman or prior treatment for trichomoniasis or nongonococcal urethritis. Urethral and first-void urine cultures were positive in 80% and 68% of positive cases, respectively. When combined, these two cultures diagnosed 49 (98%) of 50 cases. These data suggest that criteria for selection of men for culture should include presence of nonchlamydial nongonococcal urethritis, recent exposure to trichomoniasis, or a history of trichomoniasis or nongonococcal urethritis. In addition, combining urethral and urine sediment cultures may prove accurate for evaluating T. vaginalis infection.

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