
Chlamydia: Symptoms, Causes, Treatment & When to Get Tested
Chlamydia is one of the most common sexually transmitted infections (STIs) in the United States. It is caused by the bacterium Chlamydia trachomatis and can affect the genitals, rectum, and throat. Many people with chlamydia have no noticeable symptoms, which means an infection can go undetected without testing.









