After Returning from a Vacation Trip to the Amazon River

Multiple Choice

After returning from a vacation trip to the Amazon River delta in Brazil, a man notices a white dirtlike substance on his axilla hair that does not wash off in the shower. His health care provider samples the hairs and sends them to the laboratory for culture. Straw-colored yeastlike colonies show the following microscopic morphology. This is most consistent with an identification of

A) Malassezia furfur.
B) Trichosporon spp.
C) Microsporum audouinii.
D) Trichophyton rubrum.