The fungus Pneumocystis jiroveci is found in the lungs of most people in low numbers,but in immunocompromised people it overgrows,resulting in severe respiratory problems.The fungus is best described as

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The fungus Pneumocystis jiroveci is normally found in low numbers as resident microbiota in the lungs of most people. However, in immunocompromised individuals, it can opportunistically become an overgrowth and cause severe respiratory problems as an opportunistic pathogen. Therefore, the best description of this fungus is as both resident microbiota and an opportunistic pathogen.

The Fungus Pneumocystis Jiroveci Is Found in the Lungs of Most