AI Article Synopsis
- More Chinese families are adopting dishwashers and are particularly interested in their ability to sterilize and disinfect, although there is limited research on microbial distribution in these appliances across the country.
- This study used plate culture methods and high-throughput sequencing to analyze the microbiology of household dishwashers in different Chinese cities across all four seasons, isolating a total of 1109 strains of bacteria and fungi.
- Results showed consistent findings across both culturable and culture-independent analyses, identifying specific bacteria and fungi types, and providing a foundation for improving dishwasher sterilization and disinfection functions.
Article Abstract
More and more Chinese families are using dishwashers, consumers have paid special attention to the sterilization and disinfection function of dishwashers in recent years. However, there is still a lack of research on the distribution of microorganisms in dishwashers nationwide in China. In order to better upgrade the sterilization and disinfection functions of dishwashers, the plate culture method and high-throughput sequencing technology were used to comprehensively analyze the microbiology of household dishwashers in different cities of China in spring, summer, autumn and winter in this study. A total of 1109 strains of bacteria were isolated from dishwashing machine samples by culturable method, including 706 strains of bacteria distributed in 72 genera, 403 strains of fungi distributed in 52 genera.The most frequently isolated bacteria were Bacillus, Pseudomonas, Brevibacillus, Exiguobacterium, and Acinetobacter. The most frequently isolated fungi were Aspergillus, Penicillium, Exophiala, Fusarium, and Candida. A total of 3779 OTUs were obtained from bacteria and 1541 OTUs were obtained from fungi by amplicon sequencing. The results of culture-independent analysis were consistent with those of culturable analysis. This study laid a foundation for the directional screening of superior microbial resources in dishwashers. It provided data support for the further upgrading of the sterilization and disinfection function of the dishwasher.
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