02-28-2007, 03:53 PM
A 35-year-old white male, who is known to be positive for human immunodeficiency virus, presents for infectious diseases follow-up, complaining of chest tightness and mouth soreness. He reports that he was recently in Ohio with his bird-watching club. A physical exam reveals ulcers on the tongue, and auscultation indicates possible lower lobe consolidation with egophony. Radioimmunoassay testing confirms the diagnosis. What is the morphology of the yeast form of this fungus?
A. Alternating arthrospores and empty cells
B. ˜Captain™s wheel' configuration, with small buds around a thick-walled central yeast cell
C. Oval buds within macrophages
D. Spherule with endospores
E. Tuberculate macroconidia