Trichomonas vaginalis is a microscopic organism that causes the disease trichomoniasis, which can be sexually transmitted from person to person.
Trichomoniasis is transmitted through vaginal sex with an infected person.
The chance of becoming infected with trichomoniasis can be reduced by avoiding risky sexual behaviors. Sex partners should receive treatment even if they do not have any symptoms. Both men and women may be infected with trichomoniasis. Many people who are infected have no symptoms. Trichomoniasis itself is not known to lead to serious complications.