Combined effect of nisin and high hydrostatic pressure on destruction of Listeria innocua and Escherichia coli in liquid whole egg

E. Ponce, R. Pla, E. Sendra, B. Guamis, M. Mor-Mur

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    Resum

    High hydrostatic pressure inactivation of Escherichia coli and Listeria innocua inoculated in liquid whole egg was improved significantly (P < 0.05) with nisin addition at concentrations of 1.25 and 5 mg/l. A reduction of almost 5 log10 units in E. coli counts and more than 6 log10 units for L. innocua was obtained at 450 MPa and 5 mg/l of nisin. For this treatment, the two microorganisms were not detectable after 1 month of storage at 4°C. The amount of nisin added did not affect E. coli inactivation at 300 MPa. For L. innocua, 5 mg/l of nisin was more effective than 1.25 mg/l. Nisin showed no effect when samples were stored at 20°C after pressurization, except for samples with L. innocua containing 5 mg/l of nisin and treated with 450 MPa.
    Idioma originalEnglish
    Pàgines (de-a)15-19
    RevistaInternational Journal of Food Microbiology
    Volum43
    DOIs
    Estat de la publicacióPublicada - 18 d’ag. 1998

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