Chlamydia pecorum - The Fourth Species of Genus Chlamydia―
Hideto Fukushi*, and Katsuya Hirai
Department of Veterinary Microbiology, Faculty of Agriculture, Gifu University, Gifu, Gifu 501-11, Japan
Chlamydia is an obligatory intracellular bacterium. It has a unique developmental cycle accompanying morphological changes and manifests various pathogenicities including lethal systemic infection to inapparent infection (33). Before we (8) proposed a new species, Chlamydia pecorum, three species were recognized: C. trachomatis, which is a type species of genus Chlamydia, C. pneumoniae, and C. psittaci (11, 22). C. trachomatis and C. pneumoniae are human pathogens, whereas C. psittaci and C. pecorum are animal pathogens. In this article, we will review characteristics of C. pecorum, specially from molecular genetic and immunochemical point of view, adding a brief description of diseases caused by C. pecorum.