Medical Dictionary


noun Pneu·mo·cys·tis \ˌn(y)ü-mə-ˈsis-təs\

Medical Definition of Pneumocystis

  1. 1:  a genus of ascomycetous fungi that were formerly classified as protozoans and include one (P. carinii synonym P. jiroveci) causing pneumonia especially in immunocompromised individuals

  2. 2:  pneumocystis carinii pneumonia

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