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Trichomoniasis investigation — DFSRH MCQ

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ModerateSTI diagnosis and managementTrichomoniasis investigationDFSRH

A 28-year-old woman presents with frothy yellow-green discharge, vulval soreness and a strawberry cervix. Pregnancy test is negative and microscopy is available in clinic. What is the most appropriate investigation?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: C — Microscopy or NAAT for Trichomonas vaginalis with STI screen

The clinical picture suggests trichomoniasis, so microscopy or NAAT for Trichomonas plus wider STI screening is appropriate. Syphilis serology alone does not investigate discharge, and group B streptococcus is not the likely cause. Urine culture and CT do not address the vaginal/cervical presentation. The pearl is that discharge character can guide testing but should not replace STI risk assessment.

Reference: BASHH Guidelines: Trichomonas vaginalis