Chlamydia is a strict intracellular parasite with unique developmental cycle. Macrophages, as the first line of defense components in innate immunity, not only participate in inflammation induced by Chlamydia , but also play a vital role in the fight against Chlamydia infection. Meanwhile, Chlamydia has gradually formed a variety of effective mechanisms to escape from macrophage killing. A brief overview of the mechanism of interaction between C.pneumonia, C.trach...