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

Author(s) : ZHANG S., MUSTAPHA A.

Type of article: Article

Summary

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.

Details

  • Original title: Reduction of Listeria monocytogenes and Escherichia coli O157:H7 numbers on vacuum-packaged fresh beef treated with nisin or nisin combined with EDTA.
  • Record ID : 2001-0333
  • Languages: English
  • Source: Journal of Food Protection - vol. 62 - n. 10
  • Publication date: 1999/10
  • Document available for consultation in the library of the IIR headquarters only.

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