The federal government is starting a new program to help monitor and possibly control the spread of a virus that has killed millions of pigs since showing up in the US last year, and prompted the Illinois State University Farm to ban vistors. The porcine epidemic diarrhea virus, believed to be from China, causes severe diarrhea in newborn piglets, who die from dehydration. The US Department of Agriculture says it's requiring farmers to report infections, and labs where farmers send tissue and fecal samples to report positive tests. Farms that suffer an outbreak also will have to participate in a program to help control the spread of the disease. Previously, the USDA and the nation's pork industry tracked the disease with voluntary reports from the labs.
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