Targeted screening for Trichomonas vaginalis in women, a pH-based approach

Bell, Charlotte; Hough, Emma; Smith, Alan; Greene, Linda
June 2007
International Journal of STD & AIDS;Jun2007, Vol. 18 Issue 6, p402
Academic Journal
In the genitourinary medicine clinic setting, the most practical and widely used method of diagnosing Trichomonas vaginalis (TV) is direct microscopy of a wet mount preparation (WMP) of a sample taken from the posterior vaginal fornix. We retrospectively reviewed the potential impact of further limiting WMP to women with a vaginal pH ≥4.5. In total, 5/100 women with TV diagnosed on WMP had a recorded vaginal pH <4.5. One case of TV was identified in 1000 consecutive WMPs performed in women with vaginal pH <4.5. Our review demonstrates that, in our two groups, TV as diagnosed by WMP is strongly associated with a vaginal pH ≥4.5.


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