The country's first known case was discovered in 1993 in a cow from a farm near Red Deer, Alta. that had been imported from Britain.The first case of BSE in a Canadian-born beef cow was in May 2003. It's suspected that animal became infected through contaminated animal feed that contained a protein supplement made with ground meat and bone meal.The country's first known case was discovered in 1993 in a cow from a farm near Red Deer, Alta. that had been imported from Britain.  

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