In this year-end episode of Food Safety Matters, we round up the top stories of 2025, covering U.S. federal food safety policy changes under the Trump Administration, MAHA- and state-led moves against food additives of concern and ultra-processed foods, infant formula safety, science on Listeria and biofilms, ongoing monitoring of avian flu, and AI food safety applications.
A new USDA study suggests that the “green,” biodegradable enzyme ficin can improve the efficacy of conventional sanitizers when used as a pre-treatment in egg processing environments, reducing the contact time and sanitizer concentration required to achieve Salmonella biofilm inactivation.
In processing operations for dairy and low-moisture foods, specialized sanitation and environmental monitoring programs are paramount to securing food safety and hygienic operation of facilities.
This episode of Food Safety Five discusses research on Listeria biofilms, including sanitizer efficacy and evolutionary insights, and on a persisting Escherichia coli strain in leafy greens. It also covers regulatory developments in the UK, Canada, and the UAE, as well as a potential U.S. ultra-processed foods (UPFs) definition.
Wageningen University researchers conducted an experimental evolutionary study to explore the genetic and phenotypic mechanisms that drive the enhanced biofilm formation ability of evolved L. monocytogenes strains, identifying the overexpression of a certain protein as a key contributor.
This episode of Food Safety Five discusses hoses as reservoirs for biofilms in food processing facilities, the presence of Listeria monocytogenes and Campylobacter on retail beef and chicken, a new Salmonella serovar database, and microplastics release from food contact materials.
A recent study sought to better understand the ability of Listeria monocytogenes biofilms on stainless steel surfaces to withstand common industry sanitizers, chlorine and PAA, using strains and temperature conditions relevant to the fresh leafy greens supply chain.
A recent study investigating biofilms in water hoses used in a meat processing facility revealed widespread microbial colonization, reaffirming concerns about hoses as reservoirs for pathogens, and underscoring the need for routine monitoring and maintenance of water delivery systems.
A recent study found that Listeria monocytogenes from multispecies biofilms exhibits higher growth in ready-to-eat (RTE) cold-smoked salmon than L. monocytogenes from single-species biofilms. Additionally, L. monocytogenes contamination from the multi-species biofilm surpassed EU regulatory limits after 15 days of storage.
Study’s results suggest that charged nanoplastics can influence the growth, viability, virulence, physiological stress response, and biofilm lifestyle of the pathogen Escherichia coli O157:H7.
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