Non-thermal approach to Listeria monocytogenes inactivation in milk: The combined effect of high pressure, pediocin PA-1 and bacteriophage P100.

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ID: 64927
2020
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Abstract
Non-thermal food processing and replacement of chemical additives by natural antimicrobials are promising trends in the food industry. The objective of the present work was to evaluate the effect of a process which combines mild high hydrostatic pressure - HHP (200 and 300 MPa, 5 min, 10 °C), phage Listex™ P100 and the bacteriocin pediocin PA-1 as a new non-thermal process for destruction of Listeria monocytogenes (10 CFU mL or 10 CFU mL) in milk. For inoculum levels of 10 CFU mL, HHP combined with phage P100 eliminated L. monocytogenes immediately after pressurization. When L. monocytogenes was inoculated at levels of 10 CFU mL, a synergistic effect between phage P100, pediocin PA-1 and HHP (300 MPa) on the inactivation of L. monocytogenes was observed during storage of milk at 4 °C. For non-pressure treated samples inoculated with phage or pediocin or both, L. monocytogenes counts decreased immediately after biocontrol application, but regrowth was observed in a few samples during storage. Phage particles were stable during refrigerated storage for seven days while pediocin PA-1 remained stable only during three days. Further studies will have to be performed to validate the findings of this work in specific applications (e.g. production of raw milk cheese).
Reference Key
komora2020nonthermalfood Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Komora, Norton;Maciel, Cláudia;Pinto, Carlos A;Ferreira, Vânia;Brandão, Teresa R S;Saraiva, Jorge M A;Castro, Sónia Marília;Teixeira, Paula;
Journal food microbiology
Year 2020
DOI
S0740-0020(19)30038-3
URL
Keywords
bacteriophage listex™ p100 high hydrostatic pressure

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