Trichomoniasis, sometimes referred to as “trich”, is a common sexually transmitted disease that affects 7.4 million previously unaffected Americans each year. It is caused by a single-celled protozoan parasite Trichomonas vaginalis. Trichomoniasis is primarily an infection of the genitourinary tract; the urethra is the most common site of infection in men, and the vagina is the most common site of infection in women.
