By Tom Polansek CHICAGO (Reuters) - A flock of 200,000 hens in Wisconsin is the first commercial U.S. chicken operation to become infected with a lethal strain of bird flu, the U.S. Department of Agriculture said, widening the impact of a virus that has killed hundreds of thousands of turkeys this year. The chickens were at an egg-laying facility in Jefferson County, Wisconsin, between Madison and Milwaukee, and represented the state's first case of the H5N2 flu, according to the Agriculture Department. Wisconsin authorities did not identify the owner of the chickens, which will be quarantined and culled to prevent the disease from spreading. Producers such as Tyson Foods Inc have strengthened biosecurity measures to keep the disease off farms. via Health News Headlines - Yahoo News Read More Here..
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