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[Pneumocystis jirovecii]

A	B

A: Indirect immunofluorescence using monoclonal antibodies against Pneumocystis jirovecii.
B: Direct immunofluorescence antibody stain using monoclonal antibodies that target Pneumocystis jirovecii.  This image is from a bronchoalveolar lavage (BAL) specimen from a patient with a malignancy.  Image courtesy of Brigham & Women's Hospital, Boston, MA.