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Applied and Environmental Microbiology, July 2000, p. 3110-3112, Vol. 66, No. 7
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Roles of Fe Superoxide Dismutase and Catalase in Resistance of Campylobacter coli to Freeze-Thaw Stress

Don Stead and Simon F. Park*

School of Biological Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom

Received 30 December 1999/Accepted 19 April 2000

We demonstrated that oxidative stress plays a role in freeze-thaw-induced killing of Campylobacter coli following analysis of mutants deficient in key antioxidant functions. Superoxide anions, but not H2O2, were formed during the freeze-thaw process. However, a failure to detoxify superoxide anions may lead to spontaneous disproportionation of the radicals to H2O2.

* Corresponding author. Mailing address: School of Biological Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom. Phone: 44 (0)1483 879024. Fax: 44 (0)1483 300374. E-mail: s.park{at}surrey.ac.uk.

Applied and Environmental Microbiology, July 2000, p. 3110-3112, Vol. 66, No. 7
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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