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KMID : 1156220040300050440
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Journal of Environmental Health Sciences
2004 Volume.30 No. 5 p.440 ~ p.448
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Factors Influencing Airborne Concentration of Fungi, Bacteria and Gram Negative Bacteria in Kindergarten Classroom
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Park Dong-Uk
Yoon Chung-Sik
Park Doo-Yong
Jo Kyung-A
Han In-Young
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Abstract
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Airborne bacteria, gram negative bacteria (GNB) and fungi were measured in 70 class of 17 kindergartens. The objective of this study is to identify the factors influencing airborne concentrations of bacteria, GNB and fungi using multiple regression analysis. The average concentrations of bacteria and fungi exceeded 1,000 CFU/㎥. The average of GNB was 3.7×10² CFU/㎥. This results indicated that air of kindergartens was contaminated with microbes such as bacteria and fungi. ANOVA test found that the concentrations of bacteria, GNB and fungi were significantly different by the characteristics of weather (rain, after rain, sunny) sampling date (July, August, September and October), the location of sampling site (ground level and basement) and the location of toilet (inside class, nearby class and away class). Multiple regression tests concluded that sampling date, the scale of city where kindergartens are located, the location of sampling site and ventilation efficiency can significantly affect the airborne concentration of bacteria, GNB and fungi. Most of these factors could be related moisture. Environmental factors that can cause the increment of moisture should be controlled in order to reduce airborne concentration of bacteria, GNB and fungi. Legal actions concerning prohibition on the presence of toilet inside class and ventilation criteria should be taken.
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