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Journal of Bacteriology, November 2000, p. 6272-6276, Vol. 182, No. 21
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

An Escherichia coli Reference Collection Group B2- and Uropathogen-Associated Polymorphism in the rpoS-mutS Region of the E. coli Chromosome

Doreen E. Culham and Janet M. Wood*

Department of Microbiology, University of Guelph, Guelph, ON N1G 2W1, Canada

Received 8 June 2000/Accepted 10 August 2000

Chromosomal DNAs of enterohemorrhagic, uropathogenic, and laboratory attenuated Escherichia coli strains differ in the rpoS-mutS region. Many uropathogens lack a deletion and an insertion characteristic of enterohemorrhagic strains. At the same chromosomal position, they harbor a 2.1-kb insertion of unknown origin with a base composition suggestive of horizontal gene transfer. Unlike virulence determinants associated with urinary tract infection and/or neonatal meningitis (pap or prs, sfa, kps, and hly), the 2.1-kb insertion is shared by all group B2 strains of the E. coli Reference Collection.

* Corresponding author. Mailing address: Department of Microbiology, University of Guelph, Guelph, ON N1G 2W1, Canada. Phone: (519) 824-4120 ext. 3866. Fax: (519) 837-1802. E-mail: jwood{at}uoguelph.ca.

Journal of Bacteriology, November 2000, p. 6272-6276, Vol. 182, No. 21
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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