Prevalence and characteristics of attaching and effacing strains ofEscherichia coliisolated from diarrheic and healthy sheep and goats

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Abstract
Objective—To determine the prevalence and characteristics of attaching and effacing Escherichia coli (AEEC) in diarrheic and healthy small ruminants. Animals—502 lambs and kids with diarrhea and 511 healthy sheep and goats. Procedure—Fecal samples from diarrheic and healthy sheep and goats were screened for the eae gene. In addition, E coli isolates with positive results for the eae gene ( E coli eae +) were analyzed for the espB gene, production of verotoxins (VT), and serogroup. Results—A significantly higher prevalence of healthy lambs and kids were infected with AEEC, compared with diarrheic lambs and kids and healthy adult sheep and goats. Some differences in the characteristics of E coli eae+ strains isolated from diarrheic and healthy animals were detected. Thus, the espB gene was detected more frequently among E coli eae+ strains isolated from healthy animals than in those isolated from diarrheic animals, and VT production was only detected in E coli eae+ strains isolated from healthy lambs and ki...

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