Investigation and health risk assessment of microbial contamination of indoor air in public places in Xi'an City
10.3969/j.issn.1006-2483.2026.01.016
- VernacularTitle:西安市公共场所室内空气微生物污染状况调查及健康风险评价
- Author:
Dong LIU
1
;
Fan GAO
1
;
Feng ZHANG
1
;
Ping LIU
1
;
Ling CHANG
2
Author Information
1. Xi'an Center for Disease Control and Prevention, Xi'an, Shaanxi 710054, China
2. Shaanxi Provincial Health Commission, Xi'an, Shaanxi 710003, China
- Publication Type:Journal Article
- Keywords:
Public places;
Indoor microbial contamination;
Health risk assessment
- From:
Journal of Public Health and Preventive Medicine
2026;37(1):78-82
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the microbial contamination and its influencing factors of indoor air in public places in Xi'an City, to assess the health risk of employees, and to provide a scientific basis for improving the indoor environment of public places. Methods Total bacterial count and total fungal count in indoor air were monitored in hotels/inns, shopping malls/supermarkets, gyms, and waiting rooms in Xi'an from 2023 to 2024. The health risk assessment of employees was evaluated according to the Chinese Population Exposure Parameters Manual (Adult Volume). Results Overall, the standard-exceeding rate of total bacterial count in Xi'an was 3.85%, and the median values of total bacterial count and total fungal count were 350 CFU/m3 and 300 CFU/m3, respectively. The results of the generalized linear model showed that high indoor temperature and PM10 levels were associated with increased indoor bacterial concentrations (β>0, P<0.05), while high daily passenger flow, and high indoor relative humidity and PM10 levels were associated with increased indoor fungal concentrations (β>0, P<0.05). The multivariate logistic regression showed that high levels of indoor bacterial and fungal concentrations were risk factors for respiratory discomfort among employees. The hazard quotient (HQ) values for all types of public places were less than 1, indicating that the health risk of microbial aerosol exposures for employees was relatively low. Conclusion The indoor microbial pollution in public places in Xi'an is relatively mild, but countermeasures still need to be taken to reduce indoor air microbial contamination.
