美国PED的存在继续威胁加拿大养猪场

　　CANADA - An Alberta based swine veterinarian warns, despite success in the United States this summer in dealing with PED, the US continues to pose a risk to swine herds in Canada, writes Bruce Cochrane.Although the number of positive tests for Porcine Epidemic Diarrhea have continued to drop this summer in the US 34 states remain positive.

　　加拿大——阿尔伯塔猪兽医警告说，尽管今年夏天在美国成功应对PED，美国PED继续对加拿大猪群构成风险，布鲁斯·科克伦写道。今年夏天猪流行性腹泻阳性数量持续下降，在美国34个州仍然是积极的。