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  • Title: Evaluation of various methods for the detection of enteropathogenic Escherichia coli in diarrheic calves.
    Author: Larivière S, Lallier R, Morin M.
    Journal: Am J Vet Res; 1979 Jan; 40(1):130-4. PubMed ID: 378046.
    Abstract:
    Evaluation of the Escherichia coli population in the small intestine of diarrheic calves was performed by estimating the number of colony-forming units and the observation of direct gram-stained smears of mucosal scrapings. Enterotoxigenicity of the isolates was determined by the infant mouse test and the ligated intestinal segment in calves. The influence of various broth culture media on the production of enterotoxin was also studied. Serologic characterization of the E coli isolates was performed. A total of 190 cases of diarrhea in bovine neonates was studied and it was found that enteropathogenic E coi was not responsible for more than 20% of the cases. A practical approach for the recognition of enteropathogenic E coli in a routine diagnostic laboratory is proposed.
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