Bacterial Contamination in the Different Parts of Household Washing Machine: New Insights from Chengdu, Western China

Sun, Donglei; Sun, Weilian; Tang, Li; Huang, Wei; Zhang, Zunzhen

doi:10.1007/s00284-024-03630-y

Curr Microbiol

2024

DOI: 10.1007/s00284-024-03630-y

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Bacterial Contamination in the Different Parts of Household Washing Machine: New Insights from Chengdu, Western China

Donglei Sun,

Weilian Sun,

Li Tang

et al.

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Bacterial contamination in the different parts of household air conditioners: a comprehensive evaluation from Chengdu, Southwest China

Sun,

Tang,

Long

et al. 2024

Front. Public Health

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IntroductionAir flow driven by air-conditioner has a significant impact on the indoor environment, however, the bacterial contamination conditions in the different parts of air-conditioners have not been fully elucidated.MethodsIn this study, we assessed the bacterial pollution in the four parts, including air outlet, filter net, cooling fin and water sink, of ten household air-conditioners quantitatively and qualitatively from Chengdu, southwestern China.ResultsThe microbial cultivation results showed the large total bacterial counts of 5042.0, 9127.6, 6595.1, and 12296.2 CFU/cm2 in air outlet, filter net, cooling fin, and water sink. Furthermore, the sequencing data showed that these four parts displayed different bacterial characteristics. At the level of genus, Caproiciproducens and Acidipropionibacterium were predominant in air outlet. Bacillus, Acinetobacter, Paracoccus, and Corynebacterium were detected as the characteristic bacteria in filter net. For cooling fin, Rhodococcus, Achromobacter, and Nocardioides were the dominant bacteria. The genera of Methylobacterium-Methylorubrum, Brevibacterium, Stenotrophomonas, and Psychrobacter were identified as the bioindicators in water sink. The bioinformatic analysis on the sequencing data illustrated that the bacteria from air-conditioners were associated with metabolic disturbance.DiscussionThis study reveals the distinct bacterial compositions in the different parts of air-conditioner, and provides new clues for the non-negligible bacterial pollution in this common appliance from Chinese households.

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Bacterial contamination in the different parts of household air conditioners: a comprehensive evaluation from Chengdu, Southwest China

Sun,

Tang,

Long

et al. 2024

Front. Public Health

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Bacterial Contamination in the Different Parts of Household Washing Machine: New Insights from Chengdu, Western China

Cited by 1 publication

References 37 publications

Bacterial contamination in the different parts of household air conditioners: a comprehensive evaluation from Chengdu, Southwest China

Bacterial contamination in the different parts of household air conditioners: a comprehensive evaluation from Chengdu, Southwest China

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