title: Single cysts of P. carinii identified on Papanicolaou smears.
mesh_terms: D003581:Cytodiagnosis; D006801:Humans; D011010:Pneumocystis / Q000166:cytology*; D011020:Pneumonia, Pneumocystis / Q000175:diagnosis* / Q000382:microbiology; D013194:Staining and Labeling