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Trichosporon cutaneum
(de Beurmann, Gougerot & Vaucher) Ota (1926)
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Colonies on Sabouraud dextrose agar at 25°C are cream, cerebriform with broad, moist, glistening, marginal zones. Colony size is 15-17 mm after 10 days incubation.
On cornmeal following 72 hours incubation at 25°C, T. cutaneum produces both blastoconidia and true hyphae which disarticulate into rectangular arthroconidia measuring approximately 3-4 x 4-8 µm. Appressoria are absent [1270], [928].
This isolate is urease positive, but fails to grow on medium containing cycloheximide. Growth occurs at 30°C, but not at 35°C. The type strain was isolated from a skin lesion on a human. This species is most frequently associated with superficial mycoses [113], [418], has mimicked eczema in a leukemia patient [1610], and has been reported as an agent of onychomycosis [2206]. It has also been reported as an etiologic agent of septicemia, however [418], and has been reported from a neonatal intensive care unit in northeast Argentina [847]. Trichosporon cutaneum may be distinguished from other clinically-significant Trichosporon spp. by its inability to grow at temperatures above 30°C.
PubMed
GenBank
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References
113. Archer-Dubon, C., R. Orozco-Topete, J. Leyva-Santiago, R. Arenas, J. Carbajosa, and A. Ysunza. 2003. Superficial mycotic infections of the foot in a native pediatric population: a pathogenic role for Trichosporon cutaneum? Pediatr Dermatol. 20:299-302.
418. Chang, S. E., K. J. Kim, W. S. Lee, J. H. Choi, K. J. Sung, K. C. Moon, and J. K. Koh. 2003. A case of Trichosporon cutaneum folliculitis and septicaemia. Clin Exp Dermatol. 28:37-8.
847. Giusiano, G. E., M. Mangiaterra, F. Rojas, and V. Gomez. 2004. Yeasts species distribution in Neonatal Intensive Care Units in northeast Argentina. Mycoses. 47:300-3.
928. Gueho, E., M. T. Smith, G. S. de Hoog, G. Billon-Grand, R. Christen, and W. H. Batenburg-van der Vegte. 1992. Contributions to a revision of the genus Trichosporon. Antonie Van Leeuwenhoek. 61:289-316.
1270. Kurtzman, C. P., and J. W. Fell (ed.). 2000. The Yeasts. A Taxonomic Study. Elsevier Scientific B.V., Amsterdam, The Netherlands.
1610. Nakagawa, T., K. Nakashima, T. Takaiwa, and K. Negayama. 2000. Trichosporon cutaneum (Trichosporon asahii) infection mimicking hand eczema in a patient with leukemia. J Am Acad Dermatol. 42:929-31.
2206. Svejgaard, E. L., and J. Nilsson. 2004. Onychomycosis in Denmark: prevalence of fungal nail infection in general practice. Mycoses. 47:131-5.
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