ブユ刺咬症の疫学調査成績

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The epidemiological study was made on the cases of black fly bites in the campus of a certain college of Kanagawa prefecture during the period from February 1976 to January 1977,where many students had been suffered from various skin lesions by black fly bites and six kinds of black flies including the dominant species of Simulium aokii were identified from the nearby stream. The patients of 85 individuals were recorded among 200 students in total during one year survey. Black fly bites were observed in all seasons, but most of the bites occurred in three months from May to July. Most of the bites were inflicted around sunrise or sunset, especially from 3 to 5 p.m. Most of the bites occurred in the fields such as the farm or the lawn around the campus but a few cases were recognized indoor such as the green house or the passage of the school building. The sites of bites were present mainly at the upper or lower extremities. Many lesions and accompanying manifestations produced by black fly bites were recognized. Redness as primary lesions was classified into four types : erythema, point-sharp erythema, erythema nodosum and urticarial rash. These reactions occurred within 15min in most cases but the occurrence of 24hrs later was also observed. While, erythema nodosum and urticarial rash developed into secondary lesions including eczematous purulence or necrosis. In this study, severe cases including fever, nausea, headache, lymphnode swelling or general malaise were recognized. Their manifestations may suggest the participation of allergic reaction for the toxin of black flies. The duration of the scar of black fly bites was common in 4 or 5 days, but also in one year or so.
日本衛生動物学会の論文
1978-06-15

ブユ刺咬症の疫学調査成績

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