Abstract:
Objective To investigate the status of indoor microbial pollution in shopping malls and supermarkets in China, and to explore the main factors influencing of indoor air and object surface microbial pollution.
Methods The monitoring data of microbiological indicators of shopping malls and supermarkets in 128 cities in the "National Health Hazard Factors Monitoring Project in Public Places" in 2022 were evaluated with reference to standards such as the Hygienic Indicators and Limits of Public Places (GB 37488-2019). The chi-square test was used to compare the differences among groups in overstandard rates of microbial pollution indicators of air and public articles. A multivariate logistic regression model was used to analyze the main factors influencing microbial pollution.
Results This study surveyed a total of 1 083 shopping malls and supermarkets, including 540 shopping malls and 543 supermarkets. The highest rate of the over standard rates of total fungal count in the air was 21.16%, followed by the total bacterial count in the checkout counter (10.97%) and in shopping carts (baskets) (5.32%). The over standard rates of microbial indicators of other samples were all lower than 1.5%.The level of microbial pollution was affected by the basic conditions of the premises, such as opening hours, average daily customer flow and hygiene supervision quantization grading. Hygiene management measures, including establishing hygiene management records and organizing annual health check-ups for employees, help reduce the level of microbial contamination.
Conclusion The indoor microbial contamination level in shopping malls and supermarkets need to be further improved. Factors such as daily passenger flow, hygiene management level, and the use of centralized air conditioning systems affect their indoor microbial pollution levels.
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