Attaching and effacing Escherichia coli infection as a cause of diarrhea in young calves |
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Authors: | B H Janke D H Francis J E Collins M C Libal D H Zeman D D Johnson R D Neiger |
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Institution: | Animal Disease Research and Diagnostic Laboratory, South Dakota State University, Brookings 57007. |
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Abstract: | A form of enteric Escherichia coli infection was identified in 60 calves from 59 farming operations. The E coli responsible for these infections principally colonized the colon, inducing a distinctive lesion described as attaching and effacing. Hemorrhagic enterocolitis or blood in the feces was observed on 40% of the farms. Of affected calves, 86.6% were dairy calves (average age, 11.8 days). Forty-four calves were infected concurrently with other enteropathogens (cryptosporidia, rotavirus, coronavirus, enterotoxigenic E coli, bovine viral diarrhea virus, coccidia). Verotoxin-producing E coli was recovered from 31 calves; 8 were serotype O111:NM isolates, 3 were serotype O5:NM, and 1 was serotype O26:NM. |
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