Abstract
Isolated cases and family epidemics of mouse favus were found in the lower St. Lawrence Valley, especially in the Kamouraska County. The specific agent of mouse favus was repeatedly isolated from animals (mice, cats, dogs, fox) and children and adults (smooth skin and scalp). The mouse is the normal host of the dermatophyte. Cats and dogs acquire the disease from mice and transmit it to man.Cultures of the isolated dermatophytes resembled in all respects Quincke's α-Pilz (Achorion quinckeanum). The formation of elongate microconidia and pedicellate, spindle-shaped, thick-walled macroconidia with pointed tips was observed in slide cultures made with wort agar (Difco). These morphological features place the fungus in the genus Microsporum. Therefore, the specific agent of lavus of mice should be named forthwith. Microsporum quinckeanum.
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