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The Effects of Ventilation, Humidity, and Temperature on Bacterial Growth and Bacterial Genera Distribution

Author

Listed:
  • Yujia Qiu

    (Department of Physiology, The School of Basic Medicine Science, Central South University, Changsha 410000, China
    These authors contributed equally to this work.)

  • Yan Zhou

    (Department of Physiology, The School of Basic Medicine Science, Central South University, Changsha 410000, China
    These authors contributed equally to this work.)

  • Yanfen Chang

    (Department of Physiology, The School of Basic Medicine Science, Central South University, Changsha 410000, China)

  • Xinyue Liang

    (Department of Physiology, The School of Basic Medicine Science, Central South University, Changsha 410000, China)

  • Hui Zhang

    (Center for the Built Environment, University of California at Berkeley, Berkeley, CA 2506, USA)

  • Xiaorui Lin

    (China Vanke Co., Ltd., Changsha 410000, China)

  • Ke Qing

    (China Vanke Co., Ltd., Changsha 410000, China)

  • Xiaojie Zhou

    (School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266061, China)

  • Ziqiang Luo

    (Department of Physiology, The School of Basic Medicine Science, Central South University, Changsha 410000, China)

Abstract

Background: Bacteria are readily nourished in airtight environments with high humidity, such as storage cabinets, clothing closets, and corners, where ventilation is normally low and humidity is high. Objectives: We characterized the role of humidity and ventilation in bacterial growth and genus distribution at different temperatures (26 °C and 34 °C). Methods: Fresh pork, which was used as the substrate for bacterial culture, was placed in storage cabinets. Bacterial growth and genera distribution on the surface of pork placed in a storage cabinet under different temperatures (26 °C and 34 °C); relative humidity levels (RH: 50%, 70%, 90%); and ventilation conditions (no ventilation and low, medium, and high levels of ventilation) were assessed by rDNA sequencing. Results: Increased ventilation and reduced humidity significantly decreased bacterial growth at 26 °C and 34 °C. The contribution of increased ventilation to the reduction in bacterial growth exceeded that of decreased humidity. Ventilation had the greatest effect on reducing bacterial growth compared to the unventilated conditions at 70% RH. At 34 °C, medium and high levels of ventilation were required to reduce bacterial growth. High temperatures greatly increased bacterial growth, but ventilation could reduce the degree of this increase.

Suggested Citation

  • Yujia Qiu & Yan Zhou & Yanfen Chang & Xinyue Liang & Hui Zhang & Xiaorui Lin & Ke Qing & Xiaojie Zhou & Ziqiang Luo, 2022. "The Effects of Ventilation, Humidity, and Temperature on Bacterial Growth and Bacterial Genera Distribution," IJERPH, MDPI, vol. 19(22), pages 1-13, November.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:22:p:15345-:d:978656
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    References listed on IDEAS

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    1. Silvio D Brugger & Christian Baumberger & Marcel Jost & Werner Jenni & Urs Brugger & Kathrin Mühlemann, 2012. "Automated Counting of Bacterial Colony Forming Units on Agar Plates," PLOS ONE, Public Library of Science, vol. 7(3), pages 1-6, March.
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