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Medical Health Encyclopedia
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Trichomoniasis

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Normal uterine anatomy (cut section)
Normal uterine anatomy (cut section)


Trichomoniasis

Definition:

Trichomoniasis is a vaginal infection caused by a sexually-transmitted parasitic organism.

Alternative Names:
Trichomonas vaginitis; "Trich"

Text Continues Below



Causes, incidence, and risk factors:

Trichomoniasis is caused by Trichomonas vaginalis, a single cell protozoan parasite with a whip-like tail that it uses to propel itself through vaginal and urethral mucus. This sexually-transmitted disease (STD) is found worldwide.

In the United States the highest incidence is in women between 16 and 35 years of age. This disease-causing protozoan cannot survive in the mouth or rectum, and therefore must be transmitted through penis-to-vagina intercourse or vulva-to-vulva contact with an infected partner.

The symptoms of the disease are quite different in men than in women.

In men, the infection is often without symptoms (asymptomatic), and clears spontaneously in a few weeks. Symptomatic men may experience a mild urethral itching or discharge, mild burning after urination or ejaculation, and, on occasion, may develop prostatitis or epididymitis from the infection.

Women develop a frothy, foul smelling, green-white or yellowish vaginal discharge. The volume of discharge may be large. Itching may occur on the labia and inner thighs and the labia may appear swollen.

Data on the incidence and prevalence of trichomoniasis is not as complete as that for gonorrhea and syphilis. Figures suggest that it is a frequently encountered infection. More than half of all females with gonorrhea also have trichomonas. Frequently, individuals with one diagnosed STD have one or more additional sexually-transmitted infections.



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