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Applied and Environmental Microbiology, June 2007, p. 3765-3767, Vol. 73, No. 11
0099-2240/07/$08.00+0     doi:10.1128/AEM.02670-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Shedding of Escherichia coli O157:H7 in Calves Is Reduced by Prior Colonization with the Homologous Strain{triangledown}

Stuart W. Naylor,1* Allen Flockhart,1,2 Pablo Nart,1,2 David G. E. Smith,3 John Huntley,3 David L. Gally,2 and J. Christopher Low1

Animal Health Group, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG,1 Center for Infectious Diseases, Chancellor's Building, University of Edinburgh, 49 Little France Crescent, Edinburgh EH16 4SB,2 Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik EH26 0PZ, United Kingdom3

Received 15 November 2006/ Accepted 8 April 2007

Enterohemorrhagic Escherichia coli O157:H7 has a natural reservoir in the intestinal tracts of cattle. Colonization is asymptomatic and transient, but it is not clear if protective immunity is induced. This study demonstrates that prior colonization induces humoral immune responses to bacterial antigens and reduces bacterial shedding after experimental challenge with the homologous strain.

* Corresponding author. Mailing address: Animal Health Group, Scottish Agricultural College, West Mains Rd., Edinburgh EH9 3JG, United Kingdom. Phone: 44 131 5353150. Fax: 44 131 5353121. E-mail: stuart.naylor{at}sac.ac.uk

{triangledown} Published ahead of print on 20 April 2007.

Applied and Environmental Microbiology, June 2007, p. 3765-3767, Vol. 73, No. 11
0099-2240/07/$08.00+0     doi:10.1128/AEM.02670-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.





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Copyright © 2007 by the American Society for Microbiology. All rights reserved.