Trichomoniasis CausesUnderstanding trichomoniasis causes starts with a little known parasite. The infection is caused by a parasite called Trichomonas vaginalis when it affects humans. Different strains also affect cows, pigeons and other animals, but those strains are not called Trichomonas vaginalis.
Trichomoniasis is a curable STD, and is considered the most common non-viral STD in the world. An estimated 276 million cases of trichomoniasis happen each year around the world, with 187 million people carrying the STD at any given point in time. (2)
The most common of trichomoniasis causes is the spread of infection through sexual contact, either between a man and a woman or between two women. In women, trichomoniasis typically infects the vulva, vagina or urethra. Trichomoniasis in men most often occurs inside the penis (in the urethra). It does not affect other body parts, since the parasite cannot survive in places such as the mouth and anus. (3) Trichomoniasis is very unlikely to pass between two men.
In some cases, the body can fight off trichomoniasis without treatment within a few weeks or months. But in most cases, a complete trichomoniasis cure requires medical treatment. Considering it's possible to have trichomoniasis without any symptoms, it’s best to get tested again after treatment.Anyone who is sexually active can get trichomoniasis, but those most at risk are women between the ages of 16 and 35. (4) African American women in the United States are almost 10 times as likely to have the infection as white or Mexican American women. (5)