Chlamydia is a type of bacteria. There are several different species of chlamydia. A number of strains within each species are responsible for a variety of diseases in birds, humans, and other mammals. Their most common appearance is as a sexually transmitted disease (STD) referred to as chlamydia or nongonococcal urethritis (NGU).
Chlamydia is one of the most common STDs in the US, especially among sexually active teens and young adults. Prevalence is highest in people 25 years old and younger.
Chlamydia can lead to Reiter’s syndrome, which is a triad of arthr