pneumocystis
noun(Pneu-mo-cys-tis ca-ri-nii pneumonia)
a pneumonia chiefly affecting immunocompromised individuals that is caused by a microorganism (Pneumocystis carinii synonym P. jiroveci), attacks especially the interstitial and alveolar tissues of the lungs, and is characterized especially by a nonproductive cough, shortness of breath, and fever —abbreviation PCP