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    • IJAFR volume 55, no 1. 2016
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    • Irish Journal of Agricultural & Food Research
    • IJAFR volume 55, no 1. 2016
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    Effect of a bacteriophage cocktail in combination with modified atmosphere packaging in controlling Listeria monocytogenes on fresh-cut spinach

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    Author
    Boyacioglu, O.
    Sulakvelidza, A.
    Sharma, M.
    Goktepe, I.
    Keyword
    bacteriophage;
    biocontrol
    L. monocytogenes;
    modified atmosphere packaging
    spinach
    Date
    2016-12-14
    
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    URI
    http://hdl.handle.net/11019/1144; https://doi.org/10.1515/ijafr-2016-0007
    Citation
    Boyacioglu, O., Sulakvelidze, A., Sharma, M., et al. (2016). Effect of a bacteriophage cocktail in combination with modified atmosphere packaging in controlling Listeria monocytogenes on fresh-cut spinach. Irish Journal of Agricultural and Food Research, 55(1), pp. 74-79, doi:10.1515/ijafr-2016-0007
    Abstract
    A Listeria monocytogenes-specific bacteriophage cocktail was evaluated for its activity against a nalidixic acid-resistant L. monocytogenes (Lm-NalR) isolate on fresh-cut spinach stored under modified atmosphere packaging at various temperatures. Pieces (~2 × 2 cm2) of fresh spinach inoculated with 4.5 log CFU/cm2 Lm-NalR were sprayed with the phage cocktail (6.5 log plaque-forming units [PFU]/cm2) or a control. The samples were stored at 4°C or 10°C for up to 14 d in sealed packages filled with either atmospheric air (AA) or modified atmosphere (MA). At 4°C under AA, the phages significantly (P ≤ 0.05) lowered the Lm-NalR populations on spinach, compared to control-treated inoculated samples, by 1.12 and 1.51 log CFU/cm2 after 1 and 14 d, respectively. At 4°C under MA, Lm-NalR was significantly reduced by 1.95 log CFU/cm2 compared to control leaves after both 1 and 14 d. At 10°C under AA, the phages significantly reduced Lm-NalR by 1.50 and 2.51 log CFU/cm2 after 1 and 14 d compared to the control. Again at 10°C under MA, the phages significantly reduced Lm-NalR by 1.71 and 3.24 log CFU/cm2 compared to control after 1 and 14 d, respectively. The results support the potential of lytic bacteriophages in effectively reducing populations of L. monocytogenes on freshcut leafy produce, under both AA and MA conditions.
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    IJAFR volume 55, no 1. 2016

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