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Applied and Environmental Microbiology, February 2008, p. 1268-1272, Vol. 74, No. 4
0099-2240/08/$08.00+0     doi:10.1128/AEM.01618-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Characterization of Shiga Toxin-Producing Escherichia coli Isolates Associated with Two Multistate Food-Borne Outbreaks That Occurred in 2006{triangledown}

G. A. Uhlich,*1 J. R. Sinclair,2 N. G. Warren,3 W. A. Chmielecki,3 and P. Fratamico1

Microbial Food Safety Research Unit, Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, Pennsylvania,1 7803 Linden Road, Wyndmoor, Pennsylvania,2 Bureau of Laboratories, Pennsylvania Department of Health, 110 Pickering Way, Lionville, Pennsylvania3

Received 16 July 2007/ Accepted 28 November 2007

Shiga toxin-producing Escherichia coli isolates from two 2006 outbreaks were compared to other O157:H7 isolates for virulence genotype, biofilm formation, and stress responses. Spinach- and lettuce-related-outbreak strains had similar pulsed-field gel electrophoresis patterns, and all carried both stx2 and stx2c variant genes. Cooperative biofilm formation involving an E. coli O157:H7 strain and a non-O157:H7 strain was also demonstrated.

* Corresponding author. Mailing address: Eastern Regional Research Center, ARS, USDA, 600 E. Mermaid Lane, Wyndmoor, PA 19038. Phone: (215) 233-6740. Fax: (215) 233-6581. E-mail: gaylen.uhlich{at}ars.usda.gov

{triangledown} Published ahead of print on 14 December 2007.

Applied and Environmental Microbiology, February 2008, p. 1268-1272, Vol. 74, No. 4
0099-2240/08/$08.00+0     doi:10.1128/AEM.01618-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Rajendran, P., Rajan, D. P., Kang, G., Thorpe, C. M. (2009). Shiga toxin-producing Escherichia coli infection in South India. J Med Microbiol 58: 1525-1526 [Full Text]  
  • Imamovic, L., Jofre, J., Schmidt, H., Serra-Moreno, R., Muniesa, M. (2009). Phage-Mediated Shiga Toxin 2 Gene Transfer in Food and Water. Appl. Environ. Microbiol. 75: 1764-1768 [Abstract] [Full Text]  


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