Trichomoniasis - How long after I start the metronidazole am I still contagious?

Trichomoniasis is a very common, often symptomless, sexually transmitted disease (STD) that is caused by infection with a protozoan parasite called Trichomonas vaginalis. It can be treated with a single dose of prescription antibiotic such as metronidazole. To avoid getting reinfected, make sure that all of your sex partners get treated, and to avoid passing it on wait for about a week, or until your symptoms have gone, before having sex again.

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