Abstract
Summary When slope cultures are used to isolate fungi from dermatological specimens, the very slow growing fungus Trichophyton verrucosum cannot be identified in less than 2 wk. The use of petri-dish cultures allows direct examination of the inocula under the low power of the microscope after a brief period of incubation, when the distinctive appearance of T. verrucosum, which forms short, thick hyphae, many of which end in swollen vesicles, permits accurate reporting in 4 days. The same method allows rapid reporting of cultures on specimens that are microscopically negative and the removal of fast-growing contaminants before they obscure neighbouring inocula.
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