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Applied and Environmental Microbiology, July 1999, p. 3229-3232, Vol. 65, No. 7
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Viability and Virulence of Experimentally Stressed Nonculturable Salmonella typhimurium

Audrey Caro,1,* Patrice Got,1 Jean Lesne,2 Sylvie Binard,2 and Bernard Baleux1

Laboratoire Hydrobiologie, UMR CNRS-Université Montpellier II No. 5556, Université Montpellier II, F-34095 Montpellier cedex 5,1 and Laboratoire Environnement et Santé, Ecole Nationale de la Santé Publique, F-35043 Rennes cedex,2 France

Received 30 October 1998/Accepted 6 April 1999

Maintenance of pathogenicity of viable but nonculturable Salmonella typhimurium cells experimentally stressed with UV-C and seawater, was investigated relative to the viability level of the cellular population. Pathogenicity, tested in a mouse model, was lost concomitantly with culturability, whereas cell viability remained undamaged, as determined by respiratory activity and cytoplasmic membrane and genomic integrities.


* Corresponding author. Mailing address: 3205 McGavran-Greenberg Hall, CB#7400, Environmental Sciences & Engineering, School of Public Health, University of North Carolina, Chapel Hill, NC 27599-7400. Phone: (919) 966-7316. Fax: (919) 966-4711. E-mail: acaro{at}emailunc.edu.


Applied and Environmental Microbiology, July 1999, p. 3229-3232, Vol. 65, No. 7
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.



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