Abstract
Attaching and effacing Escherichia coli (AEEC) has been described as a cause of diarrhea in calves. The molecular pathogenesis of AEEC was mainly studied in human enteropathogenic E. coli strain E2348/69 in which the virulence correlated with the presence of a 35.4 kb pathogenesis island called LEE. We showed that several strains isolated from calves with diarrhea were able to produce attaching and effacing lesions in a rabbit ileal loop model and that they possess a pathogenesis island related to the LEE. Moreover, we showed that the LEE from bovine strains was inserted mainly at a different position in the chromosome compared to the human enteropathogenic E. coli strain E2348/69.
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