Here are some ...: STIs are caused by 3 groups: Bacteria - gonorrhea, chlamydia, syphilis, & chancroid; virus - HIV, HPV, herpes simplex, hepatitis- B & C; parasites - trichomonas & crab louse. Those are so far we've known of; surely, may be more to come in the future - never know.
Answered 11/24/2014
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3 doctors weighed in across 2 answers
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