Urology and Nephrology Practice Test

Trichomoniasis is caused by a protozoan organism, specifically the flagellated single-celled parasite Trichomonas vaginalis that infects the urogenital tract. This means it’s a eukaryotic microbe that lives independently as a parasite, unlike bacteria which are prokaryotic, viruses which require a host to replicate, or fungi which have different cellular structures and growth forms. Recognizing it as a protozoan helps explain its transmission, clinical presentation, and diagnostic approach (for example, detecting motile trophozoites on a wet mount or using molecular tests).