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<p>Persistent <i>Listeria monocytogenes</i> biofilms on plastic food contact substances pose significant food safety risks in food processing environments, where material composition, surface wear, and multispecies microbial interactions can promote long-term contamination. However, the combined effects of plastic composition, topography, and microbial co-culture on pathogen persistence remain insufficiently understood. Here, biofilm formation of <i>L. monocytogenes</i> was investigated on ultra-high-molecular-weight polyethylene, polyoxymethylene, polypropylene, and polyvinyl chloride surfaces with Bare, Dot, and Line topographies under monospecies and co-culture conditions. In multispecies biofilms, <i>Pseudomonas fluorescens</i> consistently promoted <i>L. monocytogenes</i> biofilm accumulation. Plastic composition and topography further modulated co-culture interactions, with polypropylene and Line-patterned surfaces supporting greater <i>L. monocytogenes</i> accumulation, whereas Bare surfaces showed lower biofilm accumulation. These findings demonstrate that material properties, surface design, and microbial interactions jointly regulate <i>L. monocytogenes</i> persistence on plastic food contact substances, providing practical insights for surface engineering and sanitation strategies to mitigate biofilm-associated contamination in food processing environments.</p>

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Surface–microbe interactions regulating Listeria monocytogenes persistence in multispecies biofilms on plastic food contact substances

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月22日

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  • Tingting Gu,
  • Yaguang Luo,
  • Zhen Jia,
  • Apisak Meesrisom,
  • Sitara Sriram,
  • Nikhita R. Kasireddy,
  • Ruogu Tang,
  • Arne J. Pearlstein,
  • Patricia D. Millner,
  • Michelle D. Danyluk,
  • KwangCheol Casey Jeong,
  • Keith R. Schneider,
  • Boce Zhang

摘要

Persistent Listeria monocytogenes biofilms on plastic food contact substances pose significant food safety risks in food processing environments, where material composition, surface wear, and multispecies microbial interactions can promote long-term contamination. However, the combined effects of plastic composition, topography, and microbial co-culture on pathogen persistence remain insufficiently understood. Here, biofilm formation of L. monocytogenes was investigated on ultra-high-molecular-weight polyethylene, polyoxymethylene, polypropylene, and polyvinyl chloride surfaces with Bare, Dot, and Line topographies under monospecies and co-culture conditions. In multispecies biofilms, Pseudomonas fluorescens consistently promoted L. monocytogenes biofilm accumulation. Plastic composition and topography further modulated co-culture interactions, with polypropylene and Line-patterned surfaces supporting greater L. monocytogenes accumulation, whereas Bare surfaces showed lower biofilm accumulation. These findings demonstrate that material properties, surface design, and microbial interactions jointly regulate L. monocytogenes persistence on plastic food contact substances, providing practical insights for surface engineering and sanitation strategies to mitigate biofilm-associated contamination in food processing environments.