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Diminution du nombre de Listeria monocytogenes et d'Escherichia coli O157:H7 dans du boeuf frais emballé sous vide, grâce à un traitement à la nisine ou à la nisine et à l'EDTA utilisés ensemble.

Reduction of Listeria monocytogenes and Escherichia coli O157:H7 numbers on vacuum-packaged fresh beef treated with nisin or nisin combined with EDTA.

Auteurs : ZHANG S., MUSTAPHA A.

Type d'article : Article

Résumé

Nisin or nisin combined with EDTA was used to treat fresh beef. Beef cubes (2.5-2.5-2.5 cm) that were inoculated with approximately 7 log CFU/ml of Listeria monocytogenes Scott A or Escherichia coli O157:H7 505 B were dipped in the following solutions: (i) H2O, (ii) HCl, (iii) nisin, (iv) EDTA, or (v) nisin combined with EDTA, respectively, for 10 min each, with the exception of one set of control beef samples without treatment. Beef samples were then dip-dried for 15 min, vacuum packaged, and stored at 4 °C for up to 30 days. The pH on beef after different treatments was not a key factor in preventing bacterial growth. Treatment with nisin or with nisin combined with EDTA reduced the population of L. monocytogenes by 2.01 and 0.99 log CFU/cm2 as compared to the control, respectively, under the conditions of vacuum package and storage at 4 °C for up to 30 days.

Détails

  • Titre original : Reduction of Listeria monocytogenes and Escherichia coli O157:H7 numbers on vacuum-packaged fresh beef treated with nisin or nisin combined with EDTA.
  • Identifiant de la fiche : 2001-0333
  • Langues : Anglais
  • Source : Journal of Food Protection - vol. 62 - n. 10
  • Date d'édition : 10/1999
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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