Q: What are the effects of an untreated chlamydia infection?
A: The infection may move inside the body if it is not treated. There, it can cause pelvic inflammatory disease (PID) in women and epidydimitis in men, two very serious illnesses. C. trachomatis can cause inflammation of the rectum and of the lining of the eye ("pink eye"). The bacteria also can infect the throat from oral sexual contact with an infected partner. In newborn babies infected with chlamydia, it may cause an eye or a lung infection.