Relationship between culturable airborne bacteria concentrations and ventilation systems in underground subway stations in Seoul, South Korea

Title
Relationship between culturable airborne bacteria concentrations and ventilation systems in underground subway stations in Seoul, South Korea
Author
박화미박화미
Keywords
Airborne bacteria; Enclosed subway stations; Environmental factors; Air supply; Ventilation
Issue Date
2015-01
Publisher
Springer Netherlands
Citation
Air Quality, Atmosphere and Health, Volume 9, Issue 2 , pp 173-178
Abstract
In this study, we evaluated the concentrations of culturable airborne bacteria (CABs) in the underground environment of 16 subway stations in Seoul, South Korea. The effects of environmental factors on CAB distributions and concentrations, including temperature, relative humidity, depth, year of construction, number of subway passengers, and ventilation, were investigated. Tryptone soy agar was used as the culture medium. Isolated bacteria were initially characterized according to cell morphology and Gram staining and then further characterized using the VITEK 2 XL microbial identification system. There were significant correlations between CAB concentrations and station temperature, depth, and construction year. Micrococcus and Staphylococcus species accounted for 66 % of the total number of CABs identified. CAB concentrations in stations with ventilation systems were significantly lower than those in stations without ventilation systems (p < 0.001). Thus, it is critical to develop techniques to improve indoor air quality in subway stations with no ventilation system.
URI
http://hdl.handle.net/20.500.11754/21102
ISSN
1873-9318
DOI
10.1007/s11869-015-0316-9
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > INSTITUTE OF ENVIRONMENTAL & INDUSTRIAL MEDICINE(환경및산업의학연구소) > Articles
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