Abstract
A fungus resembling the human pathogen Wangiella dermatitidis (Kano) McGinnis, a dematiaceous hyphomycete, was recovered from imported desiccated "black fungus" mushrooms (Auricularia polytrichia (Mont.) Sacc.), a food item popular in Far Eastern cuisine. Except for its conidia, which are mostly reniform to allantoid rather than ovoid as is characteristic for W. dermatitidis, and the undecided mode of conidiogenesis, the isolate closely resembles W. dermatitidis in gross and microscopic morphology, thermotolerance, and general and neurotrophic infectivity patterns in mice injected intraperitoneally. The foodborne isolate was also infective for infant mice inoculated by oral intubation. The systematic position of the isolate is still under investigation. There has been no previous report of W. dermatitidis or of a fungus resembling it occurring in or on foods or of the infectivity of a fungus for a mammalian host by oral intubation.
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