Externally Peer Reviewed by the Iowa Department of Public Health Chlamydia is the most common STD today. It is caused by a bacterium called Chlamydia trachomatis . It Men and women catch it by having sexual intercourse, oral sex or anal sex.
Babies catch it from their mothers during birth.
When Symptoms Show Most women have no early symptoms. Many men see signs of infection in 1 to 3 weeks. Even if you don't have symptoms, you can still give your germs to a sex partner or a baby . Signs of Infection A woman can have a discharge from her vagina. Their joints may ache, their eyes might itch or burn, or it can itch or burn around their bowel openings.