Trichomoniasis (pronounced trick-oh-mo-NEYE-ah-sis) is a sexually transmitted infection (STI). Trichomoniasis — sometimes called "trich" — is caused by a protozoa, a microscopic creature. You can catch trich by having sex without a condom with a partner who already has trichomoniasis.

A person infected with trichomoniasis often shows no symptoms. Women may notice a fishy smelling, yellowish vaginal discharge, and men may experience itching, irritation or redness at the tip of the penis. Both men and women can experience burning or pain during urination.

To screen a patient for trichomoniasis, a medical provider has to take a sample of the discharge and look for the germ under a microscope. In the near future, simpler screening tests will be available in clinics and hospitals.

Yes, trichomoniasis can be treated with antibiotics.

The risk of trichomoniasis can be reduced by choosing not to have sex or consistently using condoms whenever you do have anal or vaginal sex.

Here are some good sources of information about trichomoniasis:

"Trichomoniasis (Trich)" from Planned Parenthood

"The STI Files: Trichomoniasis" from Scarleteen

"Trichomoniasis" from KidsHealth.org