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Recovery Estimation of Dried Foodborne Pathogens Is Directly Related to Rehydration Kinetics

Émilie Lang 1, 2 Fiona Zoz 1 Cyril Laconelli 1 Stéphane Guyot 3 Pablo Alvarez-Martin 2 Laurent Beney 3 Jean-Marie Perrier-Cornet 3 Patrick Gervais 3 
3 PMB - Procédés Microbiologiques et Biotechnologiques
PAM - Procédés Alimentaires et Microbiologiques, PAM - Procédés Alimentaires et Microbiologiques [Dijon]
Abstract : Drying is a common process which is used to preserve food products and technological microorganisms, but which is deleterious for the cells. The aim of this study is to differentiate the effects of drying alone from the effects of the successive and necessary rehydration. Rehydration of dried bacteria is a critical step already studied in starter culture but not for different kinetics and not for pathogens. In the present study, the influence of rehydration kinetics was investigated for three foodborne pathogens involved in neonatal diseases caused by the consumption of rehydrated milk powder: Salmonella enterica subsp. enterica serovar Typhimurium, Salmonella enterica subsp. enterica serovar Senftenberg and Cronobacter sakazakii. Bacteria were dried in controlled relative humidity atmospheres and then rehydrated using different methods. Our results showed that the survival of the three pathogens was strongly related to rehydration kinetics. Consequently, rehydration is an important step to consider during food safety assessment or during studies of dried foodborne pathogens. Also, it has to be considered with more attention in consumers' homes during the preparation of food, like powdered infant formula, to avoid pathogens recovery.
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Soumis le : lundi 13 février 2017 - 17:53:17
Dernière modification le : lundi 21 novembre 2022 - 03:53:14

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Émilie Lang, Fiona Zoz, Cyril Laconelli, Stéphane Guyot, Pablo Alvarez-Martin, et al.. Recovery Estimation of Dried Foodborne Pathogens Is Directly Related to Rehydration Kinetics. PLoS ONE, 2016, 11 (8), ⟨10.1371/journal.pone.0160844⟩. ⟨hal-01466823⟩



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