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Assessment of dust endotoxins, airborne bacteria, and PM2.5 at old-age nursing homes and children's daycare centers in the Seoul metropolitan area, South Korea

Authors
 Sung Ho Hwang  ;  JongUk Won  ;  Wha Me Park 
Citation
 BUILDING AND ENVIRONMENT, Vol.267(Part B) : 112293, 2025-01 
Journal Title
BUILDING AND ENVIRONMENT
ISSN
 0360-1323 
Issue Date
2025-01
Keywords
Old-age nursing homes ; Daycare centers ; Dust endotoxin ; Airborne bacteria ; PM2.5
Abstract
Indoor air pollutants are associated with adverse health effects in people, particularly children and older adults—the most vulnerable groups health-wise who also happen to spend much of their time in indoor environments. To contribute to knowledge on how these groups can be protected, this study sought to determine the relationships between indoor pollutants (dust endotoxins, airborne bacteria (AB), and particulate matter (PM2.5)) and environmental factors (temperature, relative humidity (RH), use of air conditioners (AC), use of windows, and season). For each pollutant, 360 samples were collected from 31 old-age nursing homes and 31 daycare centers in South Korea. The Mann–Whitney U test, Kruskal–Wallis rank sum, Spearman's rank analysis, and multivariate regression were used to determine whether there were significant differences between indoor pollutants and environmental factors. Dust endotoxin values ranged between < LOD and 632 EU/mL and between 306 and 632 CFU/m3 for AB, and ranged from 3.9 to 32.5 µg/m3 for PM2.5. Dust endotoxin levels showed a significant relationship with RH and season in the multiple regression analysis. Periodic AC filter cleaning and exchange, as well as proper RH management in these facilities may help reduce indoor biological pollutants. The findings of this study are informative for addressing the respiratory health issues of older people and children in indoor facilities.
Full Text
https://www.sciencedirect.com/science/article/pii/S0360132324011351
DOI
10.1016/j.buildenv.2024.112293
Appears in Collections:
1. College of Medicine (의과대학) > Others (기타) > 1. Journal Papers
4. Graduate School of Public Health (보건대학원) > Graduate School of Public Health (보건대학원) > 1. Journal Papers
Yonsei Authors
Park, Wha Me(박화미) ORCID logo https://orcid.org/0000-0002-7499-0663
Won, Jong Uk(원종욱) ORCID logo https://orcid.org/0000-0002-9200-3297
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/202399
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