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Applied and Environmental Microbiology, September 1999, p. 4245-4257, Vol. 65, No. 9
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Temperature-Dependent Fermentation of D-Sorbitol in Escherichia coli O157:H7

O. M. M. Bouvet,* S. Pernoud, and P. A. D. Grimont

Unité des Entérobactéries, Unité INSERM 389, Institut Pasteur, 75724 Paris Cedex 15, France

Received 16 February 1999/Accepted 17 June 1999

The influence of growth temperature on the ability to ferment D-sorbitol was investigated in Escherichia coli O157:H7. It was found that O157:H7 strains have a temperature-sensitive sorbitol phenotype. D-Sorbitol transport and sorbitol-6-phosphate dehydrogenase activities were expressed in sorbitol-fermenting cells grown at 30°C but only at a low level at 40°C. Sorbitol-positive variants able to transport D-sorbitol were easily selected at 30°C from culture of Sor- E. coli O157:H7 strains.

* Corresponding author. Mailing address: Unité des Entérobactéries, Institut Pasteur, 75724 Paris Cedex 15, France. Phone: 33-1-40-61-36-73. Fax: 33-1-45-68-88-37. E-mail: obouvet{at}pasteur.fr.

Applied and Environmental Microbiology, September 1999, p. 4245-4257, Vol. 65, No. 9
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.




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