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Pneumocystis Pneumonia. Pneumocystis sporozoites as seen in bronchoalveolar lavage specimen stained with Giemsa method. Eight crescent-shaped sporozoites (arrow) are clustered within the confines of a cyst wall. Giemsa does not stain the cyst wall. Compare organism with background red blood cells for estimation of size.

Source: Kline MW. Rudolph's Pediatrics, 23e; 2018. 

Leah Carton

Associate Editor - Pediatrics, Dermatology, Geriatrics , McGraw Hill