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Infection and Immunity, September 1998, p. 4560-4563, Vol. 66, No. 9
Enteric Diseases and Food Safety Research
Unit, National Animal Disease Center, Agricultural Research Service,
U.S. Department of Agriculture, Ames, Iowa
500101;
Veterinary Medical Research Institute,
College of Veterinary Medicine, Iowa State University, Ames,
Iowa 500112; and
Department of
Microbiology and Immunology, F. Edward Hébert School of Medicine,
Uniformed Services University of the Health Sciences, Bethesda,
Maryland 208143
Received 8 April 1998/Returned for modification 15 May
1998/Accepted 26 June 1998
Enterohemorrhagic Escherichia coli (EHEC) strains
require intimin to induce attaching and effacing (A/E) lesions in
newborn piglets. Infection of newborn calves with intimin-positive or intimin-negative EHEC O157:H7 demonstrated that intimin is needed for colonization, A/E lesions, and disease in cattle. These
results suggest that experiments to determine if intimin-based
vaccines reduce O157:H7 levels in cattle are warranted.
0019-9567/98/$00.00+0
Escherichia coli O157:H7 Requires
Intimin for Enteropathogenicity in Calves
*
Corresponding author. Mailing address: USDA, ARS,
National Animal Disease Center, P.O. Box 70, Ames, IA 50010-0070. Phone: (515) 239-8376. Fax: (515) 239-8458. E-mail:
enystrom{at}nadc.ars.usda.gov.
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