Found on WebMD.com

What Is Trichomoniasis?

Trichomoniasis — an infection from a parasite spread primarily through sexual intercourse — is not serious, but it is contagious. In most men it does not cause symptoms, which makes it notoriously difficult to diagnose. However, women usually do have symptoms, which may include discomfort that lasts for a week to several months and may be more pronounced right after menstruation or during pregnancy. Left untreated, the parasite may infect tissues throughout the urinary tract and reproductive system. In men the infection may spread to the urethra, prostate gland, seminal vesicles, and epididymis. In women, vulnerable sites for infection include the vagina, urethra, cervix, bladder, and various glands.

Women have a greater chance of getting the infection if they use oral contraceptives, are pregnant, or frequently use commercial douches, all of which create the right environment in the body for the infection.

What Causes It?

The culprit behind trichomoniasis is a protozoan parasite called Trichomonas vaginalis, which usually is transmitted through intercourse. There has been some conjecture that trichomonas may also be acquired from toilet seats, locker room benches, damp towels, and bathing suits, but there is no actual proof.



How Do I Know If I Have Trichomoniasis?

Your doctor may want to examine your vaginal or urethral discharge under a microscope or test your urine. Trichomoniasis occasionally shows up on Pap smears in women with no symptoms. Your best bet is to get tested if you think you may have been exposed to the parasite.

What Are the Treatments?

Nine out of 10 people with trichomoniasis are cured with a single course of antibiotics. Stubborn cases require larger doses administered over longer periods of time.

Medication
The drug most commonly used to fight trichomoniasis is Flagyl, or metronidazole, which comes in tablet form; few other drugs are as effective. If you take Flagyl, you may experience side effects such as nausea, vomiting, or a metallic aftertaste. You can minimize discomfort by taking the drug during or immediately after a meal. Also, don't drink alcohol within 24 hours of taking the medicine; if you do, you may experience severe abdominal pain and vomiting.

At-Home Remedies
Women who douche frequently with commercial chemical products may raise their risk of developing trichomoniasis. You should not douche unless told to do so by a healthcare professional.

How Can I Prevent It?

   * Use a condom when having sex.
* Don't share towels or swimsuits.

Trichomonas is not likely transmitted through oral sex.  Digestive enzymes in stomach should destroy the parasite. If trichomas gets into the bowel or bladder (usually from vaginal or rectal intercourse), it can cause chronic recurrent bowel problems/urinary complaints until treated - in addition to the typical vaginitis.  It is more of an "STD-fellow-traveler", rather than a true STD, since it can be acquired from activities other than sexual contact.