Pathogenicity of an Enterotoxigenic Escherichia coli Hemolysin ( hlyA ) Mutant in Gnotobiotic Piglets

Author:

Moxley Rodney A.1,Berberov Emil M.1,Francis David H.2,Xing Jun1,Moayeri Mahtab3,Welch Rodney A.3,Baker Diane R.2,Barletta Raúl G.1

Affiliation:

1. Departments of Veterinary and Biomedical Sciences, University of Nebraska—Lincoln, Lincoln, Nebraska 685831;

2. Department of Veterinary Science, South Dakota State University, Brookings, South Dakota 570072; and

3. Department of Medical Microbiology and Immunology, University of Wisconsin, Madison, Wisconsin 537063

Abstract

ABSTRACT Pigs infected with hemolytic F4 + strains of enterotoxigenic Escherichia coli often develop septicemia secondary to intestinal infection. We tested the hypothesis that inactivation of hemolysin would reduce the ability of F4 + enterotoxigenic E. coli to cause septicemia in swine following oral inoculation. Inactivation of the hemolysin structural gene ( hlyA ) did not decrease the incidence of septicemia in the gnotobiotic piglet model.

Publisher

American Society for Microbiology

Subject

Infectious Diseases,Immunology,Microbiology,Parasitology

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