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A new line of defense: Researchers find cattle vaccine works to reduce E. coli O157:H7
Date:8/6/2012

MANHATTAN, KAN. -- A commercial vaccine for cattle can effectively reduce levels of E. coli by more than 50 percent, a Kansas State University study has found. The vaccine is also effective using two doses instead of the recommended three doses, which can help cut costs for the beef industry.

David Renter, associate professor of epidemiology, is the principal investigator on a project that researched the effectiveness of products used to prevent the shedding of E. coli O157:H7 in cattle. The research appears in a recent online version of the journal Vaccine and helps improve current preventative methods for addressing food safety concerns.

While E. coli O157:H7 does not affect cattle, it causes foodborne disease in humans. Vaccines and other products may be given to cattle to help prevent the spread of the bacteria.

"We wanted to test how well these products work to control E. coli O157:H7 in a commercial feedlot with a large population of cattle that were fed in the summer and may be expected to have a high level of E. coli O157:H7," Renter said.

Other Kansas State University researchers involved include T.G. Nagaraja, university distinguished professor of microbiology; Nora Bello, assistant professor of statistics; Charley Cull, doctoral student in pathobiology, Oakland, Neb.; and Zachary Paddock, doctoral student in pathobiology, Manhattan, Kan. Abram Babcock, an August 2010 Kansas State University doctoral graduate, also was involved in the research.

Using a commercial feedlot setting, the researchers studied more than 17,000 cattle during an 85-day period. They studied two products: a vaccine and a low-dose direct-fed microbial.

"What's unique about this study is the number of animals we used, the research setting and that we used commercial products in the way that any cattle producer could use them," Renter said. "We didn't want it to be any different than the way so
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Contact: David Renter
drenter@k-state.edu
785-532-4801
Kansas State University
Source:Eurekalert

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