Pathogenicity of an Enterotoxigenic Escherichia coli Hemolysin ( hlyA ) Mutant in Gnotobiotic Piglets
نویسندگان
چکیده
منابع مشابه
Pathogenicity of an enterotoxigenic Escherichia coli hemolysin (hlyA) mutant in gnotobiotic piglets.
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 ...
متن کاملColonization of gnotobiotic piglets by a luxS mutant strain of Escherichia coli O157:H7.
Gnotobiotic piglets inoculated with Escherichia coli O157:H7, its luxS mutant derivative, or nonpathogenic E. coli were evaluated for attaching and effacing lesions. Although no differences in clinical symptoms were seen between pigs inoculated with the parent and those inoculated with the luxS mutant, the luxS mutant-inoculated pigs had a lower frequency of attaching and effacing lesions in th...
متن کاملEscherichia coli Isolated from Domestic Animals Pathogenic for Gnotobiotic Piglets.
Three strains of Escherichia coli isolated from infectious processes in a calf, a dog, and a cat were examined for their capacity to produce disease or death, or both, in newborn gnotobiotic piglets. The O groups represented by these particular strains of E. coli were O4: (canine origin), O6: (feline origin), and O39: (bovine origin). All three isolates upon oral administration proved to be pat...
متن کاملVirulence plasmids of enterotoxigenic Escherichia coli isolates from piglets.
Virulence plasmids of 68 ETEC isolates from piglets belonging to different pathotypes and six ETEC isolates from calves with pathotypes typical of porcine ETEC were identified with seven virulence probes for the heat-stable (STa and STb) and heat-labile (LT) enterotoxins, for the F4, F5, F6, and F41 fimbrial adhesion subunit, and also with five Rep probes for the RepFIA and RepFIB basic replico...
متن کاملResistance of gnotobiotic large white and Chinese piglets to in vivo attachment of a K88ab enterotoxigenic Escherichia coli strain.
In vivo adhesion of a K88ab-positive enterotoxigenic Escherichia coli (ETEC) strain to the small intestinal wall of gnotobiotic, colostrum-deprived Chinese and Large White piglets was investigated. A non-enterotoxigenic, attachment factor-deprived E. coli strain, inoculated in association with the K88ab ETEC strain, was used as a marker to determine the content residues on the intestinal walls ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Infection and Immunity
سال: 1998
ISSN: 0019-9567,1098-5522
DOI: 10.1128/iai.66.10.5031-5035.1998