What is the only common infection of the reproductive tract caused by a protozoan?

gonorrhea

chlamydia

trichomoniasis

candidiasis

Trichomoniasis

Explanation:

Trichomoniasis is an sexually transmitted disease that affects around 30% of world population. The common symptoms are frequent urge to urinate, vaginal bleeding, burning sensation during urination.

The causative agent of trichomoniasis is a protozoa called Trichomonas vaginalis. This protozoan can be transfer through the genital contact. The protozoa can easily be transfer from affected individual to the healthy individual.

Thus, the correct answer is option (3).