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Comparative study of the antilisterial activity of nisin A and periocin AcH in fresh ground pork stored aerobically at 5 deg C.

Author(s) : MURRAY M., RICHARD J. A.

Type of article: Article

Summary

Listeria innocua strain Lin11 was used to compare the inhibitory activity of two bacteriocins. Nisin A proved to be considerably more efficient than pediocin AcH, but generally after two days surviving bacteria in meat treated with each bacteriocin resumed growth at a rate similar to that of the control. Increasing the nisin concentration resulted in greater loss of viability followed by regrowth of survivors. In addition, listeria cells surviving nisin action were found to have become resistant to nisin whereas survivors of pediocin AcH remained susceptible to this bacteriocin. The factors affecting bacteriocin activity in raw ground pork meat were then investigated. It was concluded that nisin A is more appropriate than pediocin AcH for decontamination of this kind of meat but that routine use of nisin A at concentrations not high enough to eradicate all listerial cells could result in emergence of populations resistant not only to nisin A but the other bacteriocins.

Details

  • Original title: Comparative study of the antilisterial activity of nisin A and periocin AcH in fresh ground pork stored aerobically at 5 deg C.
  • Record ID : 1999-1003
  • Languages: English
  • Source: Journal of Food Protection - vol. 60 - n. 12
  • Publication date: 1997/12
  • Document available for consultation in the library of the IIR headquarters only.

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