Chlamydia

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Chlamydia (klă-mid-iă) n. a genus of Gram-negative bacteria that are obligate intracellular parasites of humans and other animals, in which they cause disease. C. pneumoniae a cause of pneumonia. C. psittaci the cause of psittacosis. C. trachomatis the causative agent of the eye disease trachoma and a common cause of sexually transmitted infections (see urethritis).
—chlamydial adj.

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