Chlamydia is a common sexually transmitted infection caused by the bacterium Chlamydia trachomatis. It is spread through unprotected vaginal, oral, or anal sex. Symptoms of chlamydia can be mild and may not be noticed, but if left untreated, it can cause serious health complications like pelvic inflammatory disease and infertility. Diagnosis is made through a urine test or swab of the infected area. Treatment is with antibiotics, and people who are sexually active should be tested regularly for chlamydia.
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