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Int J Food Microbiol. 2006 Apr 1;107(3):281-6. Epub 2006 Jan 4.

Antilisterial activity of grape juice and grape extracts derived from Vitis vinifera variety Ribier.

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Food Science Postgraduate Programme, Department of Chemistry, The University of Auckland, Private Bag 92019, Auckland, New Zealand.


Grape juice and skin and seed extracts of Vitis vinifera var. Ribier black table grapes were found to be highly inhibitory towards Listeria monocytogenes. This grape juice was also active against all other Listeria species tested but not against Bacillus cereus, Salmonella Menston, Escherichia coli, Staphylococcus aureus or Yersinia enterocolitica. Fractionation of the extracts showed that the antilisterial activity was strongest in the polymeric phenolic fractions. Two different types of active compounds were identified: the red-pigmented polymeric phenolics from juice and skin showed pH-dependent antilisterial activity, while the unpigmented polymeric phenolics from the seed showed antilisterial activity which was independent of pH.

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