EDMONTON -- A new case of mad cow disease in Alberta was not unexpected and should have no immediate impact on the lucrative cross-border beef trade, Canadian and U.S. officials say.

• 爱城--据加拿大和美国官方消息，在阿尔伯达发现的新一例疯牛病并不是意外事件，不会对目前良好的国际牛肉贸易造成直接影响。