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"Trich" redirects here. For the hair pulling disorder, see Trichotillomania.
Classification & external resources
Trichomoniasis epidemiology
ICD-10 A59.
ICD-9 131
DiseasesDB 13334
eMedicine med/2308  emerg/613
MeSH D014246

Trichomoniasis, sometimes referred to as "trich", is a common sexually transmitted disease that affects 7.4 million previously unaffected Americans each year. It is caused by a single-celled protozoan parasite Trichomonas vaginalis. Trichomoniasis is primarily an infection of the genitourinary tract; The urethra is the most common site of infection in men, and the vagina is the most common site of infection in women. It is most common in women and uncircumsized men. For uncircumsized men, the most common site for the infection is the tip of the penis.



Trichomoniasis, like many other sexually transmitted diseases, often occurs without any symptoms. Men almost never have symptoms, while 20% of women are asymptomatic.

  • When women have symptoms, they usually appear within 5 to 28 days of exposure. The symptoms in women include a heavy, yellow-green or gray vaginal discharge, discomfort during intercourse, unpleasant vaginal odor, and painful urination. Irritation and itching of the female genital area, and on rare occasions, lower abdominal pain also can be present. In about two-thirds of infected females, there is edema, inflammation, cell hypertrophy and metaplasia.
  • The symptoms in men, if present, include a thin, whitish discharge from the penis and painful or difficult urination.

Genetic Sequence

A draft sequence of the Trichomoniasis genome was published on January 12, 2007 in the journal Science confirming that the genome has at least 26,000 genes, a similar number to the human genome.[1]


Research has shown a link between trichomoniasis and two serious sequelæ. Data suggest that:

  • Trichomoniasis is associated with increased risk of transmission of HIV.
  • Trichomoniasis may cause a woman to deliver a low-birth-weight or premature infant.

Additional research is needed to fully explore these relationships.


Use of male condoms may help prevent the spread of trichomoniasis, although careful studies have never been done that focus on how to prevent this infection. Treatment is usually Metronidazole.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Trichomoniasis". A list of authors is available in Wikipedia.
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