Abstract
A widespread epizootic due to a granular variety of T. mentagrophytes occurred in a new stock of laboratory guinea pigs imported to Perth from an eastern state of Australia. The infection spread quickly among these animals; infection also occurred in rabbits and mice at the breeding station and in 4 people. The human infections were contracted directly through handling animals or indirectly by fomites. The strain of T. mentagrophytes causing the epizootic was distinctive from strains previously isolated in Western Australia.