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Survie de Pseudomonas fluorescens et Salmonella typhimurium dans du boeuf traité par faisceau électronique et par irradiation ionisante avant entreposage frigorifique.

Survival of Pseudomonas fluorescens and Salmonella typhimurium after electron beam and gamma irradiation of refrigerated beef.

Auteurs : CHUNG M. S., KO Y. T, KIM W. S.

Type d'article : Article

Résumé

The radurization effects of gamma ray and electron beam irradiation at 1.5 and 3.0 kGy on beef steaks inoculated with Salmonella typhimurium and Pseudomonas fluorescens were investigated during 8 days of storage at 5 °C. Total bacterial counts and numbers of Salmonella typhimurium and P. fluorescens were analyzed at 2-days intervals. Total bacterial counts of samples irradiated by both gamma rays and electron beam were significantly (P < 0.05) reduced by 3.8 to 5.3 log CFU/g, Salmonella typhimurium was not detectable during the experimental period. P. fluorescens counts of samples irradiated by gamma ray at both 1.5 and 3.0 kGy were not detected; however, P. fluorescens in samples irradiated by electron beam at 1.5 and 3.0 kGy was recovered after 2 days, and bacterial counts reached 7.8 and 6.9 log CFU/g, respectively. Both gamma ray and electron beam irradiation reduced total bacterial counts initially. Irradiation was very effective in destroying Salmonella typhimurium; however, P. fluorescens was not completely eliminated by electron beam irradiation. Gamma ray irradiation was thus more effective than electron beam irradiation in the destruction of P. fluorescens.

Détails

  • Titre original : Survival of Pseudomonas fluorescens and Salmonella typhimurium after electron beam and gamma irradiation of refrigerated beef.
  • Identifiant de la fiche : 2001-1464
  • Langues : Anglais
  • Source : Journal of Food Protection - vol. 63 - n. 2
  • Date d'édition : 02/2000
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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