Pathogenesis and Microbiology
Classification of Chlamydia Species
Chlamydia trachomatisis a member of the Chlamydiaceae family. There is one genus Chlamydia containing three species that infect humans: C. pneumoniae, C. psittaci,and C. trachomatis.
C. pneumoniae and C. psittaci cause pneumonia. C. trachomatis causes trachoma in all ages, genital infections, lymphogranuloma venerum (LGV), and conjunctivitis in adults, and conjunctivitis and pneumonia in neonates.
Chlamydiae are obligate intracellular bacteria with a Gram-negative-like cell wall. Chlamydia generally infects the columnar epithelial cells and often becomes chronic, lasting months to more than a year if untreated.
The life cycle of C. trachomatisis 72 hours. It requires that the bacteria live within a host cell and that they survive by replication that results in the death of the cell.
More specifically, the life cycle is as follows:
Page last reviewed: December, 2009
Content Source:Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention