what can you get trichomoniasis from?
Trichomoniasis. Trichomoniasis (TRIK-uh-muh-NEYE-uh-suhss) or "trich" is a sexually transmitted infection (STI) caused by a parasite. The parasite is spread most often through vaginal, oral, or anal sex. It is one of the most common STIs in the United States and affects more women than men.