Chlamydia is a common sexually transmitted disease caused by bacteria. You can get chlamydia during oral, vaginal, or anal sex with an infected partner. Both men and women can get it.
Chlamydia usually doesn't cause symptoms. If it does, you might notice a burning feeling when you urinate or abnormal discharge from your vagina or penis.
In both men and women, chlamydia can infect the urinary tract. In women, infection of the reproductive system can lead to pelvic inflammatory disease (PID). PID can cause infertility or serious problems with pregnancy. Babies born to infected mothers can get eye infections and pneumonia from chlamydia. In men, chlamydia can infect the epididymis, the tube that carries sperm. This can cause pain, fever, and, rarely, infertility.
A lab test can tell if you have chlamydia. Antibiotics will cure the infection. Correct usage of latex condoms greatly reduces, but does not eliminate, the risk of catching or spreading chlamydia. Experts recommend that sexually active women 25 and younger get a chlamydia test every year.
NIH: National Institute of Allergy and Infectious Diseases
Diagnosis and Tests
- Chlamydia Test (American Association for Clinical Chemistry)
Prevention and Risk Factors
- Male Condoms (Mayo Foundation for Medical Education and Research)
- Chlamydia (Logical Images)
Statistics and Research
- FastStats: Sexually Transmitted Diseases/STD (National Center for Health Statistics)
- NCHHSTP Atlas (Centers for Disease Control and Prevention)
- Sexually Transmitted Diseases Surveillance, 2012: Chlamydia (Centers for Disease Control and Prevention)
- ClinicalTrials.gov: Chlamydia Infections (National Institutes of Health)
Journal ArticlesReferences and abstracts from MEDLINE/PubMed (National Library of Medicine)
Find an Expert
- Chlamydia (For Parents) (Nemours Foundation)
- Chlamydia (Nemours Foundation)
- Chlamydia Available in Spanish
- Chlamydia (Centers for Disease Control and Prevention) - PDF Available in Spanish
- Chlamydia infections in women Available in Spanish
- Chlamydial infections - male Available in Spanish
- Condom Fact Sheet in Brief (Centers for Disease Control and Prevention) - PDF Available in Spanish
- Endocervical gram stain Available in Spanish
- Lymphogranuloma venereum Available in Spanish
- Urethral discharge culture Available in Spanish