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NewsContamination ControlRegulatorySanitationFood Safety Five NewsreelMicrobiological ControlBiofilm ControlFDAInternational Standards/HarmonizationUSDA

Food Safety Five Ep. 20: The Latest Research on Listeria Biofilms, E. coli, and the UPFs Debate

By Bailee Henderson
November 18, 2025

This episode of Food Safety Five discusses a study that evaluated the antimicrobial efficacy of chlorine and peracetic acid (PAA) against Listeria monocytogenes biofilms, a first-of-its kind application of experimental evolution to understand the genetic and phenotypic adaptations that enable L. monocytogenes to form robust biofilms, and an ongoing project investigating a reoccurring, emerging, and persisting (REP) Escherichia coli strain that has been linked to multiple leafy greens-associated foodborne illness outbreaks. Additionally, we mention the U.S. debate over a potential, federally recognized definition for “ultra processed foods” (UPFs), and several other regulatory updates from the UK, Canada, and the United Arab Emirates (UAE).

News Articles:

  • Study Explores Sanitizer Limitations Against Listeria Biofilms in Leafy Greens Production
  • First-of-its-Kind Study Shows How Listeria Strains Evolve Into Strong Biofilm Formers
  • Researchers Developing Tool to Help Leafy Greens Growers Mitigate REP E. coli Strain
  • Food Industry Stakeholders Share Input on FDA, USDA’s Intent to Define UPFs
  • Canada Reduces Regulatory Red Tape for Produce, Eggs
  • UK Updates Food Law Codes of Practice
  • Abu Dhabi to Establish Novel Foods Regulatory Framework

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KEYWORDS: Canada CFIA e.coli FSA leafy greens listeria study UAE UK ultra-processed foods

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Baileehendersonmay23

Bailee Henderson is the Digital Editor of Food Safety Magazine, where she covers industry-relevant current events, regulatory affairs, and scientific developments. She also produces the Food Safety Five Newsreel. Notably, Bailee's coverage for Food Safety Magazine has been featured in national televised news segments including CBS Sunday Morning and MSNBC's Rachel Maddow Show. She can be reached at hendersonb@bnpmedia.com.

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