A dichotomous identification key to pathogenic species of the basisiomycetous genus Trichosporon Behrend is provided. It is based on growth tests with carbon sources not traditionally used in yeast taxonomy, viz. uric acid, ethylamine, L-4-hydroxyproline, tyramine and L-phenylalanine as sources of carbon and nitrogen, and polygalacturonate, quinate, 4-ethylphenol, 2,3-dihydroxybenzoate and orcinol as sole carbon sources. Of the standard growth tests, assimilation of L-rhamnose and the maximum growth temperature proved to be useful. In addition to medically relevant species, other species able to grow at 37 degrees C were treated as well.
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