Pig virus spreads

摘要

Canada confirmed its first case of porcine epidemic diarrhoea virus on 23 January. The virus, which causes diarrhoea and vomiting in pigs, was detected on a farm in Middlesex County, Ontario. First identified in the United Kingdom in 1971, the virus can kill 80-100% of infected piglets. It caused mass epidemics in Europe in the 1970s and 1980s. Last spring, the United States reported its first case (see Nature 499,388; 2013), and the virus has since spread to 23 states.