Trichomoniasis is a sexually transmitted infection (STI) caused by the parasite Trichomonas vaginalis (T. vaginalis) which was first discovered in 1836.

What is the origin of trichomoniasis?

Trichomoniasis is caused by a one-celled protozoan, a type of tiny parasite that travels between people during sexual intercourse. The incubation period between exposure and infection is unknown, but it's thought to range from four to 28 days.

What animal did trichomoniasis come from?

Trichomoniasis is a venereal disease of cattle. It is transmitted from cow to cow by a bull during breeding. Bulls show no clinical signs.