New pig virus is spreading across the country
Isle of Wight hog farmers using disinfectants, extra restrictions to protect herds July 23, 2013|By Allison T. Williams and Michael Welles Shapiro, atwilliams@dailypress.com | 757-247-4535 ISLE OF WIGHT — A virus that has killed thousands of young pigs in 15 states has now leaped from the Midwest to North Carolina. The states affected include eight where a Smithfield Foods hog-raising subsidiary has facilities. The company says none of its 12 sow farms — company-owned facilities where sows give birth to piglets — have been affected. Murphy-Brown, Smithfield's North Carolina-based hog farming unit, owns 460 farms and contracts with 2,100 farmers in 12 states. It has directed its farmers to take steps to protect their herds from the virus. No visitors are allowed and people who work with the animals wear boots and are sprayed with disinfectant whenever they leave a pig enclosure. Porcine epidemic diarrhea virus, known as PEDV, causes severe diarrhea and vomiting. Although pigs of all ages can be infected with the virus, older pigs have stronger immune systems and become more resistant to the disease, said Harry Snelson, a veterinarian and communications director for the American Association of Swine Veterinarians. "The highest mortality rate is in infected piglets younger than seven days," Snelson said. Entire herds of young pigs have died from the virus, particularly in the Midwestern states that are among the country's top pork producers. Previously, the virus was only found in Europe and China, where it killed more than a million young pigs last year. Researchers do not know how the virus reached the United States, but it is moving rapidly. It was first confirmed in Arkansas in May. By the end of June, it had spread to more