Genital chlamydia infection is caused by some of the subtypes of Chlamydia trachomatis
. Other subtypes cause trachoma and lymphogranuloma venereum (LGV). Like all chlamydial species, the organism has to grow within cells, and so it is found within the endothelium and epithelium of the endocervix, rectum, peritoneal cavity, fallopian tubes, oropharynx and conjunctiva. Genital chlamydia is a common STI in Australia, particularly in adolescents and young adults.
The incubation period is 7-14 days or longer. The period of communicability is unknown but relapses are probably common. Contact infectivity is high with 68% of male partners of infected women found positive by NAAT (PCR)