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Trich: The Most Common Sexually Transmitted Infection You May Never Have Heard Of

Trichomona Vaginalis trophozoite.

Trichomoniasis, a Sexually Transmitted Infection caused by a parasite, infects more people in the U.S. each year than chlamydia, gonorrhea, and syphilis combined.  And yet, according to a new survey, few people have even heard of it. 

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