Differential growth of Listeria monocytogenes at 4 and 8°C: Consequences for the Shelf Life of Chilled Products

Authors: Rosso, L.¹; Bajard, S.²; Flandrois, J.P.³; Lahellec, T.C.⁴; Fournaud, J.⁵; Veit, P.⁶

Source: Journal of Food Protection®, Volume 59, Number 9, September 1996 , pp. 944-949(6)

Publisher: International Association for Food Protection

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Abstract:

Growth rates and lag times of Listeria monocytogenes at 4 and 8°C were compared in dairy products (milk, cream, and cheese), minced beef, and smoked salmon. Results showed that an increase in incubation temperature from 4 to 8°C leads to a significant decrease in time required to reach a given bacterial population density. The decreases were about 50% on cheese surfaces, 60 to 65% in milk and cream, and 75 to 80% in minced beef and smoked salmon. Consequences on the shelf life of chilled products are discussed on the basis of a simple and general linear relationship between the relative decrease in shelflife and generation time. This relationship was experimentally highlighted and theoretically demonstrated.

Keywords: LISTERIA MONOCYTOGENES; MICROBIAL GROWTH; TEMPERATURE; SHELF LIFE; DAIRY PRODUCTS; BEEF; SMOKED FISH

Document Type: Research article

Affiliations: 1: Laboratoire de Bacteriologie, CNRS UMR 5558, Faculte de Medecine Lyon-Sud, B. P. 12, 69921 Oullins Cedex and Crealis, Danone Group, 2.1. du Teinchurier, 19100 Brive 2: Laboratoire de Bacteriologie, CNRS UMR 5558, Faculte de Medecine Lyon-Sud, B. P. 12, 69921 Oullins Cedex and Centre National des Etudes Wterinaires et Alimentaires, CNEVA (Ministere de 'Agriculture et de : , Alimentation), 43 rue de Dantzig, 7501 : 3: Laboratoire de Bacteriologie, CNRS UMR 5558, Faculte de Medecine Lyon-Sud, B. P. 12, 69921 Oullins Cedex 4: Centre National des Etudes Wterinaires et Alimentaires, CNEVA (Ministere de 'Agriculture et de : , Alimentation), 43 rue de Dantzig, 75015 Paris : 5: Ministere de I 'Agriculture et de l'Alimentation, Direction Generale de l'Alimentation, 175 Rue du Chevaleret, 75013 Paris 6: Direction Generale de la Consommation, de la Concurrence et de la Repression des Fraudes (Ministere de l'Economie), Bureau Hygiene, 59, boulevard Vincent Auriol, 75703 Paris, Cedex 13, France

Publication date: 1996-09-01

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Differential growth of Listeria monocytogenes at 4 and 8°C: Consequences for the Shelf Life of Chilled Products

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