Chlamydia is a sexually transmitted bacterial infection and the most common sexually transmitted disease (STD). It affects both men and women and can spread via oral, vaginal or rectal intercourse. An infection may not always produce symptoms, which is why routine screening for chlamydia is recommended for at-risk sexually active men and women.
Chlamydia is easily treated with antibiotics. However, it can lead to serious reproductive health problems if left untreated. Pregnant women carry the risk of passing on the infection to their newborn.