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''Chlamydia trachomatis'', an organism responsible for the most prevalent STD in the United States, is one of four bacterial species in the genus ''Chlamydia''. ''C. trachomatis'' is a gram-negative bacterium. It is ovoid in shape and non- motile. The bacteria are non spore forming but the elementary bodies act as a spore when released into the host. The inclusion bodies of ''Chlamydia trachomatis'' were first described in 1942; the ''Chlamydia trachomatis'' agent was first cultured in the yolk sacs of eggs by Professor Tang Fei-fan et al in 1957.〔 〕 ''C. trachomatis'' includes three human biovars: *Serovars Ab, B, Ba, or C — cause trachoma: infection of the eyes, which can lead to blindness *Serovars D-K — cause urethritis, pelvic inflammatory disease, ectopic pregnancy, neonatal pneumonia, and neonatal conjunctivitis *Serovars L1, L2 and L3 — lymphogranuloma venereum (LGV). Many, but not all, ''C. trachomatis'' strains have an extrachromosomal plasmid. Chlamydia can exchange DNA between its different strains, thus the evolution of new strains is common. ==Identification== ''Chlamydia'' species are readily identified and distinguished from other Chlamydia species using DNA-based tests. Most strains of ''C. trachomatis'' are recognized by monoclonal antibodies (mAbs) to epitopes in the VS4 region of MOMP. However, these mAbs may also cross-react with two other ''Chlamydia'' species, ''C. suis'' and ''C. muridarum''. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chlamydia trachomatis」の詳細全文を読む スポンサード リンク
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