ヒョウヒダニ類の生息状況に及ぼす部屋の用途および床材の影響

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In order to elucidate the influence of types of houses, rooms, and flooring on the prevalence of house dust mites, surveys were undertaken in livingrooms and bedrooms of wooden Japanesestyle houses and concrete-built apartments in and around Nagoya City, from September 1983 to June 1985 at about 3-month intervals. The numbers of rooms examined were 33 livingrooms and 34 bedrooms in wooden houses, 27 and 29 in apartments, respectively. In wooden houses, the annual mean number of Dermatophagoides pteronyssinus was not significantly affected by room ratios (No. of rooms/family size), types of rooms, or flooring, whereas the number of D. farinae was significantly greater in houses with high room ratios (>1.3) than houses with low room ratios (<1.2). The prevalence of D. farinae was also affected by flooring; relatively large number of the mites was detected from carpeted floors. In apartments, the number of D. pteronyssinus decreased with the height from the ground, while the number of D. farinae did not significantly vary with the floor level, types of rooms, or flooring. These data suggested that there was no appreciable limiting factor for the prevalence of D. pteronyssinus in wooden houses, nor for D. farinae in apartments. It was also shown that the type of rooms had no significant influence on the prevalence of mites of both species. On carpeted floors, which has low humidity control capacity and thermal conductivity, the number of D. farinae was greater than that of D. pteronyssinus. The results suggested that microhabitats on carpeted floors were rather dry and more favorable for the prevalence of D. farinae than for D. pteronyssinus. On the other hand, on tatami and wood floors, which are known to have high humidity control capacity, the numbers of D. farinae in wooden houses and D. pteronyssinus in apartments varied greatly according to room ratio and floor level, respectively. Relatively large numbers of D. farinae and D. pteronyssinus were detected from the plastic floors of apartments. These results suggested an interrelationship among the humidity requirements in mites, humid conditions of rooms influenced largely by room ratio in wooden houses and the floor level of apartments, and microclimates of the floor, which are influenced by humidity control capacity and thermal conductivity of flooring materials, in the prevalence of house dust mites.
日本衛生動物学会の論文
1993-09-15

ヒョウヒダニ類の生息状況に及ぼす部屋の用途および床材の影響

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