pneumocystis
- 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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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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pneumocystis
(nōō′mə-sĭs′tĭs)- A pneumonia caused by the parasitic protozoan Pneumocystis carinii and affecting primarily individuals with an immunodeficiency disease, such as AIDS.
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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.