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Comportement de Listeria monocytogenes dans des traitements impliquant de la réfrigération.

Behaviour of Listeria monocytogenes under combined chilling processes.

Auteurs : MEMBRÉ J. M., ROSS T., MCMEEKIN T.

Type d'article : Article

Résumé

Growth kinetics were measured at 7 °C in tryptone soy broth supplemented with 0-6% yeast extract as the culture medium as a function of pH, pre-incubation temperatures (4 or 7 °C), cooling 0.05 or 0.1 °C/min) and freezing (0 and -5 °C) treatments. Growth curves generated were fitted by Gompertz and Baranyi functions. Listeria monocytogenes grew at 7 °C without a lag phase, except when the sub-culture was performed at 37 °C, whereas the specific growth rate was affected by the chilling processes. In fact, L. monocytogenes grew slightly faster at 7 °C pre-incubation treatment. These results suggest that to mimic the processes of contamination in industry, predictive microbiology studies should be performed with organisms cultured at low temperatures.

Détails

  • Titre original : Behaviour of Listeria monocytogenes under combined chilling processes.
  • Identifiant de la fiche : 2002-1871
  • Langues : Anglais
  • Source : Lett. appl. Microbiol. - vol. 28 - n. 3
  • Date d'édition : 03/1999
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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