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Applied and Environmental Microbiology, July 2004, p. 4375-4378, Vol. 70, No. 7
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.7.4375-4378.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Comparison of Shiga-Toxigenic Escherichia coli Prevalences among Dairy, Feedlot, and Cow-Calf Herds in Washington State

Rowland N. Cobbold,1* Daniel H. Rice,1 Maryanne Szymanski,1 Douglas R. Call,2 and Dale D. Hancock1

Field Disease Investigation Unit, Department of Veterinary Clinical Sciences,1 Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164-66102

Received 14 November 2003/ Accepted 5 April 2004

ABSTRACT

Shiga-toxigenic Escherichia coli (STEC) strains were isolated from 7.4% of 1,440 fecal and farm environmental samples. Shiga toxin gene and STEC prevalences were significantly associated with animal production type and season. A range of serogroups were identified. Nine percent of isolates possessed all three principal virulence markers: stx2, eae, and ehx.

* Corresponding author. Mailing address: Field Disease Investigation Unit, Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA 99164-6610. Phone: (509) 335-0729. Fax: (509) 335-0880. E-mail: cobbold{at}vetmed.wsu.edu.

Applied and Environmental Microbiology, July 2004, p. 4375-4378, Vol. 70, No. 7
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.7.4375-4378.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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