Trichomoniasis laboratory findings
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Diagnosis of vaginal trichomoniasis is usually performed by microscopy of vaginal secretions, but this method has a sensitivity of only approximately 60%–70% and requires immediate evaluation of wet preparation slide for optimal results.
Laboratory Findings
Trichomoniasis is diagnosed by visually observing the trichomonads via a microscope. In women, the examiner collects the specimen during a pelvic examination by inserting a speculum into the vagina and then using a cotton-tipped applicator to collect the sample. The sample is then placed onto a microscopic slide and sent to a laboratory to be analyzed.
In men, wet preparation is insensitive, and culture testing of urethral swab, urine, and semen is required for optimal sensitivity. No FDA-cleared PCR test for T. vaginalis is available in the United States, but such testing might be available from commercial laboratories that have developed their own PCR tests. [2][3]
Two trophozoites of Trichomonas vaginalis obtained from in vitro culture. Smear was stained with Giemsa.[4]