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Infection and Immunity, October 2004, p. 6168-6171, Vol. 72, No. 10
0019-9567/04/$08.00+0     DOI: 10.1128/IAI.72.10.6168-6171.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Long Polar Fimbriae Contribute to Colonization by Escherichia coli O157:H7 In Vivo

Dianna M. Jordan,1* Nancy Cornick,2 Alfredo G. Torres,3,{dagger} Evelyn A. Dean-Nystrom,4 James B. Kaper,3 and Harley W. Moon1

Department of Veterinary Pathology,1 Department of Veterinary Microbiology and Preventive Medicine Iowa State University,2 Preharvest Food Safety and Enteric Disease and Food Safety Research Unit, National Animal Disease Center, Agricultural Research Service, U.S. Department of Agriculture Ames, Iowa,4 Center for Vaccine Development and Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland3

Received 20 April 2004/ Returned for modification 1 June 2004/ Accepted 2 July 2004

The contribution of long polar fimbriae to intestinal colonization by Escherichia coli O157:H7 was evaluated in sheep, conventional pigs, and gnotobiotic piglets. E. coli O157:H7 strains with lpfA1 and lpfA2 mutated were recovered in significantly lower numbers and caused fewer attachment and effacement lesions than the parent strain.

* Corresponding author. Present address: Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA 50011. Phone: (515) 294-7792. Fax: (515) 294-3564. E-mail: dmjordan{at}iastate.edu.

Editor: J. B. Bliska

{dagger} Present address: Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555.

Infection and Immunity, October 2004, p. 6168-6171, Vol. 72, No. 10
0019-9567/04/$08.00+0     DOI: 10.1128/IAI.72.10.6168-6171.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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Copyright © 2004 by the American Society for Microbiology. All rights reserved.