Statistical Study of Dermatomycosis for 30 Years (1968-1997) in Sendai National Hospital
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概要
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A statistical study on dermatomycoses for the 30 years from 1968 to 1997 in the dermatologic section of Sendai National Hospital was carried out with the following results. The total number of dermatomycosis patients was 14, 259 and accounted for 9.59% of all new outpatients during this period. These cases of dermatomycoses were composed of the following: dermatophytoses 10, 656, candidiasis 3, 287, malassezia infection 566, sporothrichosis 20, aspergillosis 7, and chromomycosis 1. Annual changes in number of dermatophytoses varied in each clinical type: tinea corporis and tinea cruris had increased by the end of the 1970s, and there after decreased gradually until recent years. Tinea pedis and tinea unguium, on the contrary, increased after the 1980s. Age distribution of all clinical forms of dermatophytoses changed gradually, and its peak of the distribution curve shifted to an older site each year, while the number of younger generation patients decreased. Mycologically Trichophyton (T.) rubrum was mainly isolated from all types of dermatophytoses, and T. mentagrophytes followed. The ratio of these two species (R/M) in tinea pedis was 1.25, and the ratio of T. mentagrophytes was relatively high. Epidermophyton floccosum was continuously isolated, but its frequency in recent years has decreased. Microsporum canis infection increased from the middle period of this research, but after 1990 decreased gradually. The other dermatophytes were found sporadically. In recent years the species isolated have become more simplified. Among candidiasis, infantile candidiasis increased dramatically in the 1970s but soon decreased. Intertrigo type also increased in the same period and then decreased to an intermediate level. Paronychia, onychia and erosio interdigitale were constantly found in small numbers, while malassezia infection remained at a constant level and was found more in male patients.
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