alexa Combined effect of sodium nitrite with high-pressure treatments on the inactivation of Escherichia coli BW25113 and Listeria monocytogenes NCTC 11994.


Journal of Food Processing & Technology

Author(s): De Alba M, Bravo D, Medina M, Park SF, Mackey BM

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Abstract The bactericidal effect of acidified sodium nitrite alone or when combined with high hydrostatic pressure (HHP) treatment was examined with Escherichia coli BW25113 and Listeria monocytogenes NCTC 11994. A powerful synergistic effect of HHP plus nitrite was observed at pH 4·0, but not at higher pH values. Escherichia coli hmpA and norV mutants lacking defences against nitrosative stress were more sensitive to pressure combined with acidified sodium nitrite than the wild-type strain, suggesting an involvement of nitric oxide in the bactericidal effect. © 2012 The Society for Applied Microbiology. This article was published in Lett Appl Microbiol and referenced in Journal of Food Processing & Technology

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