Most likely it's the heat. Both last summer and this have been marked by a flareup of publicity about bovine spongiform encephalopathy, or mad cow disease. Last July, the BSE matter concerned the rollout of a new testing regimen by the U.S. Department of Agriculture. At that time, we learned, USDA intended to test a much larger number of animals in an effort to better quantify the prevalence of the disease. It was thought the increased testing of cattle could have two opposing results -- ...

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