Chlamydia trachomatis

Chlamydia includes C. trachomatis, C. psittaci, and C. pneumonia. Chlamydia trachomatis is further divided into three biological variants: trachoma, sexually transmitted lymphogranuloma venereum (LGV), and rat biological variants. Chlamydia trachomatis biological variants have A to K18 serotypes, of which A, B, Ba, C cause trachoma, and D to K cause urogenital infections, such as inclusion body conjunctivitis, non-gonococcal urethritis, cervicitis, salpingitis , Epididymitis, proctitis, neonatal pneumonia and otitis media. Chlamydia genitourinary tractitis is one of the most sexually transmitted diseases in the world. There are four serotypes of venereal lymphogranuloma, L1, L2, L2a, and L3, which can cause venereal lymphoblastoma. Murine biological variants do not cause human disease. Chlamydia psittaci and Chlamydia pneumoniae cause respiratory infections, especially pneumonia.