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Effect of Antimicrobial Washes, Essential Oil Vapor Phase, and Antimicrobial Pullulan Coating in Reducing Escherichia coli O157:H7 and Salmonella Typhimurium on Strawberries

Food Protection Trends • 2021
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Publication Information
Authors Mohamed K. Morsy, Mohamed A. Abdelmonem, and Valentina Trinetta
Keywords Not Available
Journal Food Protection Trends
Publisher International Association for Food Protection
Volume 41
Issue 5
Pages 464–475
publication.type International
Paper Link Open Link
Supplementary Materials Not Available
Abstract
The aim of this study was to evaluate three different antimicrobial strategies—washes, essential oil vapor phases, and coatings—against Escherichia coli O157:H7 and Salmonella Typhimurium to improve the safety of strawberries. Results indicated that 0.5% acetic acid and acidified 0.1% sodium chlorite were effective in reducing the population of E. coli O157:H7 (1.6 and 2.6 log CFU/g) and Salmonella Typhimurium (2 and 2.8 log CFU/g), respectively. Thyme essential oil vapor at 500 μL/Lair showed greater inhibition against E. coli O157:H7 and Salmonella Typhimurium on strawberry (2 and 3 log CFU/g, respectively) than oregano oil (1.5 and 2.5 log CFU/g, respectively; P < 0.05). During challenge studies, the coatings containing grape seed nanoparticles and pomegranate peel nanoparticles were demonstrated to effectively inhibit (P < 0.05) these pathogens compared with the control coatings. Overall, a greater antimicrobial activity (>4 log CFU/g) was observed when the different systems were combined, demonstrating the possibility to use these strategies to improve the quality and safety of strawberries.