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Applied and Environmental Microbiology, December 2008, p. 7447-7450, Vol. 74, No. 23
0099-2240/08/$08.00+0     doi:10.1128/AEM.01190-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

International Comparison of Clinical, Bovine, and Environmental Escherichia coli O157 Isolates on the Basis of Shiga Toxin-Encoding Bacteriophage Insertion Site Genotypes{triangledown}

Joshua H. Whitworth,1 Narelle Fegan,2 Jasmin Keller,2 Kari S. Gobius,2 James L. Bono,3 Douglas R. Call,1 Dale D. Hancock,4 and Thomas E. Besser1*

Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164-7040,1 Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164-6610,4 Microbiology Group, Food Science Australia, P.O. Box 3312, Tingalpa DC, Queensland 4173, Australia,2 U.S. Meat Animal Research Center, Agricultural Research Service, U.S. Department of Agriculture, Clay Center, Nebraska 68933-01663

Received 28 May 2008/ Accepted 30 September 2008

Escherichia coli O157:H7 genotypes in the bovine reservoir may differ in virulence. The proportion of clinical genotypes among cattle isolates was weakly (P = 0.054) related to the international incidence of E. coli O157:H7-associated hemolytic-uremic syndrome, varied among clinical isolates internationally, and also differed along the putative cattle-hamburger-clinical case transmission chain.


* Corresponding author. Mailing address: Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, P.O. Box 647040, Pullman, WA 99164-7040. Phone: (509) 335-6075. Fax: (509) 335-8529. E-mail: tbesser{at}vetmed.wsu.edu

{triangledown} Published ahead of print on 10 October 2008.


Applied and Environmental Microbiology, December 2008, p. 7447-7450, Vol. 74, No. 23
0099-2240/08/$08.00+0     doi:10.1128/AEM.01190-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.