International Journal of STD & AIDS > Volume 18, Number 6 > Pp. 402-403

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Original research articles

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

Charlotte Bell, Emma Hough, Alan Smith and Linda Greene

The Jefferiss Wing, St Mary's Hospital, Praed Street, London W2 1NY, UK; The Jefferiss Wing, St Mary's Hospital, Praed Street, London W2 1NY, UK; The Jefferiss Wing, St Mary's Hospital, Praed Street, London W2 1NY, UK; The Jefferiss Wing, St Mary's Hospital, Praed Street, London W2 1NY, UK

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.

Key Words: PH • TRICHOMONAS VAGINALIS • WET MOUNT PREPARATION • MICROSCOPY

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