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    Trichomoniasis is a sexually transmitted disease (STD) caused by a small organism called Trichomonas vaginalis. Women are most often affected by this disease, although men can become infected and pass the infection to their partners through sexual contact.

    How Common Is Trichomoniasis?

    Trichomoniasis is the most common curable STD in young, sexually active women. An estimated 7.4 million new cases occur each year in women and men.

    How Do I Know If I Have Trichomoniasis?

    Men often do not have symptoms of trichomoniasis and usually do not know they are infected until their partners need treatment. But when symptoms do occur, they include:

    • Irritation inside the penis
    • Mild discharge
    • Slight burning after urination or ejaculation

    Many women do have signs or symptoms of infection. Symptoms in women can include:

    Symptoms usually appear within five to 28 days of exposure in women.

    How Is Trichomoniasis Diagnosed?

    To diagnose trichomoniasis, a doctor must perform a physical exam and lab test. Lab tests are performed on a sample of vaginal fluid or urethral fluid to look for the disease-causing parasite. The parasite is harder to detect in men than in women.

    How Is Trichomoniasis Treated?

    Usually an oral antibiotic called metronidazole (Flagyl) is given to treat trichomoniasis. It is the only drug that should be used to treat trichomoniasis if there is any chance that you could be pregnant.

    Your partner should also be treated at the same time to prevent reinfection and further spread of the disease. In addition, persons being treated for trichomoniasis should avoid sex until they and their sex partners complete treatment and have no symptoms. It is important to take all of your antibiotics, even if you feel better. You should get retested after three months to be certain the infection is gone, even if your partner has been treated.

    What Happens If I Don't Get Treated for Trichomoniasis?

    Trichomoniasis in pregnant women may cause premature rupture of the membranes that protect the baby, and early delivery. The genital inflammation caused by trichomoniasis might also increase a woman's risk of acquiring HIV infection if she is exposed to HIV. Trichomoniasis in a woman who is also infected with HIV can increase the chances of transmitting HIV infection to a sex partner.

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