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From the News Archives...

The "bad" E. coli persists in the barn but not on pasture

The type of E. coli bacteria responsible for most cases of human illness and death is called "E. coli 0157:H7. Recently, calves that had tested positively for this deadly strain were divided into two groups. One was raised in a barn, and the other on pasture. Samples were taken once a month from April to September. The calves raised on pasture showed no signs of 0157:H7 for the entire period. Meanwhile, every one of the calves raised in pens had at least one positive sample. According to the Swedish researchers who conducted the study, "This suggests that calves on pasture may be less exposed to the bacteria or that they clear themselves."

Jonsson, M.E. et al. "Persistence of Verocytotoxin-Producing Escherichia Coli 0157:H7 in Calves Kept on Pasture and in Calves Kept Indoors" Int. J Food Microbiol 66, 1-2 (2001): 55-61.


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