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KMID : 0895420060160020101
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Journal of Korean Society of Occupational and Enviromental Hygiene
2006 Volume.16 No. 2 p.101 ~ p.109
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Size-based Characteristics of Airborne Bacteria and Fungi Distributed in the General Hospital
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Kim Ki-Yion
Won Jong-Uk
Roh Jae-Hoon
Lee Chang-Rae
Kim Chi-Nyon
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Abstract
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The objective of this study is to provide fundamental data for pertinent management of indoor air quality through
investigating the size-based characteristics of bioaerosol distributed in the general hospital. Measurement sites are main lobby, ICU, ward and laboratory and total five times were sampled with six-stage cascade impactor. Based on the result of this study, concentrations of airborne bacteria and fungi were the highest in main lobby as followed by an order of ward, ICU and laboratory. Concentrations of airborne bacteria was generally higher than those of airborne fungi and the ratio of indoor and outdoor concentration of both exceeded 1.0 in all the measurement sites of the general hospital. The predominant genera of airborne bacteria identified in the general hospital were Staphylococcus spp.(50%), Micrococcus spp.(15 20%), Corynebacterium spp.(5 20%), and Bacillus spp.(5 15%). On the other hand, the predominant genera of airborne fungi identified in the general hospital were Cladosporium spp.(30%), Penicillium spp.(20 25%), Aspergillus spp.(15 20%), and Alternaria spp.(10 20%). In regard to size distribution of bioaerosol, the detection rate was generally highest on 5 stage(1.1 2.1 ) for airborne bacteria and on 1 stage( 7.0 ) for airborne fungi. Cleanliness of facilities in the general hospital and condition of HVAC system should be monitored regularly to prevent indoor air contamination by airborne
microorganisms.
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KEYWORD
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general hospital, airborne bacteria, airborne fungi, size distribution, bioaerosol
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