Scientists at the University of Nebraska-Lincoln won a five-year, $2.35 million grant to continue research that aims to discover why some cattle carry and shed very high levels of the E. coli O157:H7 bacteria. The bacteria is known to colonize in cattle's intestinal tracts, but recent research has shown that a small number of "supershedders" may be responsible for a disproportionate amount of E. coli transmission, the researchers say.

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