pneumocystis

/ (ˌnjuːməʊˈsɪstɪs) /

noun

any protozoan of the genus Pneumocystis, esp P. carinii, which is a cause of pneumonia in people whose immune defences have been lowered by drugs or a disease

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Medical definitions for pneumocystis

pneumocystis
[ nōō′mə-sĭstĭs ]

n.

A pneumonia caused by the parasitic protozoan Pneumocystis carinii and affecting primarily individuals with an immunodeficiency disease, such as AIDS.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.