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Reduction of normal flora by irradiation and its effect on the ability of Listeria monocytogenes to multiply on ground turkey stored at 7 °C when packaged under a modified atmosphere.

Author(s) : THAYER D. W., BOYD G.

Type of article: Article

Summary

Listeria monocytogenes did not multiply faster during storage at 7 °C on irradiated than on nonirradiated raw ground turkey, and there was a concentration-dependent inhibition of its multiplication by CO2. Ground turkey was gamma irradiated at 5 °C to 0, 1.5, and 2.5 kGy and inoculated (~100 CFU/g) after irradiation with a cocktail of L. monocytogenes ATCC 7644, 15313, 49594, and 43256. The meat was then packaged in air-permeable pouches or under atmospheres containing 30 or 53% CO2, 19% O2, and 51 or 24% N2 and stored at 7 °C for up to 28 days. A dose of 2.5 kGy extended the time for the total plate count to reach 10 000 000 CFU/g from 4 to 19 days compared to that for nonirradiated turkey in air-permeable pouches. Irradiating ground turkey did not decrease its safety when it was contaminated following processing with L. monocytogenes.

Details

  • Original title: Reduction of normal flora by irradiation and its effect on the ability of Listeria monocytogenes to multiply on ground turkey stored at 7 °C when packaged under a modified atmosphere.
  • Record ID : 2002-0271
  • Languages: English
  • Source: Journal of Food Protection - vol. 63 - n. 12
  • Publication date: 2000/12
  • Document available for consultation in the library of the IIR headquarters only.

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