(Rischin) Ota (1926)

Macroscopic morphology

Colonies on Sabouraud dextrose agar at 25°C are white, undulate, dull, and radially furrowed. Colony size is 10 mm after 10 days incubation.

Microscopic morphology

On cornmeal following 72 hours incubation at 25°C, it produces primarily true hyphae that disarticulate into rectangular arthroconidia measuring approximately 3-4 x 4-8 µm. Yeast cells are seen sparingly. Appressoria are absent [1270], [928].

Special notes

This isolate is urease positive and grows on media containing cycloheximide. The type strain was isolated from human skin. This species is most frequent associated with superficial mycoses [925], although it has been noted as an etiological agent in a nosocomial fungemia [1272]. Trichosporon asteroides may be distinguished from N/A(L):T. asahii by its primarily filamentous morphology and from N/A(L):T. inkin by it inability to form appressoria. Medically relevant Trichosporon species may also be identified based on sequences of the internal transcribed spacer regions [2189].