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Applied and Environmental Microbiology, December 1999, p. 5600-5603, Vol. 65, No. 12
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Escherichia coli Resistance to Chlorine and Glutathione Synthesis in Response to Oxygenation and Starvation

Sébastien Saby,1 Pierre Leroy,2 and Jean-Claude Block1,*

LCPE-LSE, UMR Université CNRS 7564,1 and Centre du Médicament-UPRES EA-ER 635,2 Faculté de Pharmacie, 54001 Nancy Cedex, France

Received 28 May 1999/Accepted 13 September 1999

Reduced glutathione (GSH) levels and resistance to chlorine were measured for two isogenic Escherichia coli strains stressed by oxygenation and/or starvation. The E. coli mutant deficient in GSH was not more sensitive to the oxidant than its parent strain when the bacteria were cultured with a low oxygenation rate. Starvation or oxygenation increased the resistance of the parent strain to chlorine, while the resistance of the deficient strain remained unchanged.

* Corresponding author. Mailing address: LCPE-UMR Université CNRS 7564, Faculté de Pharmacie, Pôle de l'Eau, 15, avenue du Charmois, F-54500 Vandoeuvre, France. Phone: 33 383 59 62 56. Fax: 33 383 59 62 60. E-mail: block{at}pharma.u-nancy.fr.

Applied and Environmental Microbiology, December 1999, p. 5600-5603, Vol. 65, No. 12
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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