What is chlamydia?
Chlamydia (say cla-mid-ee-ah) is a bacteria (germ) that you can catch through sexual contact with someone who is infected. It can also be given to newborn babies by mothers who have chlamydia during the last part of their pregnancy. Chlamydia is one of the most common sexually transmitted infections (STIs) in the United States.
Written by familydoctor.org editorial staff
Reviewed/Updated: 03/10
Created: 09/00