Pneumocystis jirovecii 2

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Pneumocystis jirovecii 2

#00066773

Author: Najmaldin Saki, PhD; Mahdis Kakoli, M.Sc.
Category: Infectious Disease > Fungi > Pneumocystis
Published Date: 11/10/2026

This case report presents a 39-year-old woman with pulmonary cavitary lesions, in whom Ziehl-Neelsen staining for suspected mycobacteria incidentally revealed false-positive acid-fast Pneumocystis jirovecii cysts. This case illustrates diagnostic mimicry, emphasizing that P. jirovecii—the primary causative agent of Pneumocystis pneumonia (PJP) in immunocompromised patients—can confound the diagnosis of acid-fast bacilli (AFB) infections.

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