Chlamydia

Cause

Chlamydia infection is caused by the bacterium Chlamydia trachomatis. It is spread during vaginal, anal, or possibly oral sex with an infected partner. A pregnant woman may spread the infection to her newborn during delivery.

You can spread chlamydia even if you do not have symptoms of infection. You can spread the infection until you have been treated.

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Author:	Sandy Jocoy, RN	Last Updated: January 9, 2009
Medical Review:	Joy Melnikow, MD, MPH - Family Medicine Jeanne Marrazzo, MD, MPH - Infectious Disease
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