Chlamydia pneumoniae is a causative agent of respiratory diseases, such as pneumonia, bronchitis, and sinusitis.Even though everyone is not affected by it, C.pneumoniae is one of the microorganisms that causes community-acquired pneumoniae. C.pneumoniae is pleomorphic, a gram negative obligate intracellular bacterium. C.pneumoniae exists in two forms, the EB and RB. The extracellular which is called elementary body(EB) is attached the host’s cell and transforms to reticulate body (RB) after being phagocytized by the cell. When it is in RB form, it is capable of using the host’s cell energy for replication. A laboratory test, such as direct microscopic which is and fluorescent antibody test is done for C.pneumoniae. In direct microscopic, inclusions
