What is chlamydia?
Chlamydia trachomatis - commonly known as chlamydia - is a common sexually transmitted infection (STI) caused by the bacterium of the same name. Many people do not experience any symptoms of chlamydia.
In addition to the sex organs, chlamydia can infect the rectum which may cause rectal bleeding, pain, and discharge. Bodily fluids carrying the bacteria can also infect the eye, causing conjunctivitis (pink eye).