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Applied and Environmental Microbiology, August 2009, p. 5421-5423, Vol. 75, No. 16
0099-2240/09/$08.00+0     doi:10.1128/AEM.00459-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Prevalence of Escherichia coli O157:H7 in Organically and Naturally Raised Beef Cattle {triangledown} ,{dagger}

S. Reinstein, J. T. Fox, X. Shi, M. J. Alam, D. G. Renter, and T. G. Nagaraja*

Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas 66506-5606

Received 24 February 2009/ Accepted 12 June 2009

We determined the prevalence of Escherichia coli O157:H7 in organically and naturally raised beef cattle at slaughter and compared antibiotic susceptibility profiles of the isolates to those of isolates from conventionally raised beef cattle. The prevalences of E. coli O157:H7 were 14.8 and 14.2% for organically and naturally raised cattle, respectively. No major difference in antibiotic susceptibility patterns among the isolates was observed.

* Corresponding author. Mailing address: Department of Diagnostic Medicine and Pathobiology, 1800 Denison Avenue, Manhattan, KS 66506-5606. Phone: (785) 532-1214. Fax: (785) 532-4851. E-mail: Tnagaraj{at}vet.k-state.edu

{triangledown} Published ahead of print on 19 June 2009.

{dagger} Contribution no. 08-294-J from the Kansas Agricultural Experiment Station.

Applied and Environmental Microbiology, August 2009, p. 5421-5423, Vol. 75, No. 16
0099-2240/09/$08.00+0     doi:10.1128/AEM.00459-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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