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SEXUALLY TRANSMITTED DISEASES CONTROL BRANCH
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Chlamydia

ChlamydiaChlamydia is a common sexually transmitted infection (STI) caused by a bacterium called Chlamydia trachomatis. Infection often causes​​ no symptoms, and if not treated, can lead to serious reproductive health problems such as pelvic inflammatory disease (PID) and infertility. Chlamydia also can cause infections in newborn babies. Tests and effective treatments are available.​

​**Please note, the treatment regimens for patient-delivered partner therapy/expedited partner therapy are out of date in these documents. Please refer to the 2021 STI Treatment guidelines for the current treatment regimens.
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