Untitled

Abstract

Statistical survey of dermatophytes isolated in the dermatology clinic, Hokkaido University Hospital, during the period from Sept. 1978 to Aug. 1979 revealed that T, rubrum and T, mentagrophytes were predominant.Dermatomycoses due to M, canis and T, verrucosum respectively were more frequently observed in Hokkaido compared with the other district of Japan. The reason for the prevalence of M.canis infections in Hokkaido might be explained as much spreading of the fungus infections among cats and more closer contact to infected cats in this district. T, verrucosum infections were almost always observed among dairly farmers and their families. Dairy farming is one of the main industries in Hokkaido. Therefore, it is understandable that this disease is prevalent in this district, because the transmission of fungus may more frequently happen, if the cattles were infected with T, verrucosum.The cases infected with M, gypseum and T, uiolaceum respectively were observed in recent years, which were considered to be rare in Hokkaido. This fact might indicate that the etiology of the ringworm in Hokkaido seems to become similar to that in the other districts of Japan.