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Applied and Environmental Microbiology, April 2000, p. 1706-1710, Vol. 66, No. 4
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Significance of Inoculum Size in the Lag Time of Listeria monocytogenes

Jean-Christophe Augustin,1,* Agnès Brouillaud-Delattre,2 Laurent Rosso,3 and Vincent Carlier1

Service d'Hygiène et Industrie des Denrées Alimentaires d'Origine Animale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort Cedex,1 Agence Française de Sécurité Sanitaire des Aliments, F-94703 Maisons-Alfort Cedex,2 and Pôle de Compétence en Sécurité des Aliments, Groupe Danone, F-19100 Brive-la-Gaillarde,3 France

Received 8 November 1999/Accepted 6 January 2000

The lag time of Listeria monocytogenes growing under suboptimal conditions (low nutrient concentrations, pH 6, and 6.5°C) was extended when the inoculum was severely stressed by starvation and the inoculum size was very small. Predictive microbiology should deal with bacterial stress and stochastic approaches to improve its value for the agro-food industry.

* Corresponding author. Mailing address: Service d'Hygiène et Industrie des Denrées Alimentaires d'Origine Animale, Ecole Nationale Vétérinarie d'Alfort, 7 avenue de Général de Gaulle, F-94704 Maisons-Alfort Cedex, France. Phone: (33) (0) 1.43.96.70.43. Fax: (33) (0) 1.43.96.71.21. E-mail: augustin{at}vet-alfort.fr.

Applied and Environmental Microbiology, April 2000, p. 1706-1710, Vol. 66, No. 4
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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