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4/24/2012 1:20 PM

On April 24, the USDA announced the nation's fourth case of bovine spongiform encephalopathy (BSE), sometimes called mad cow disease, in a dairy cow from central California. Dr. John Clifford, USDA's chief veterinary officer, answers a series of questions about this BSE case.

Given the prolonged winter, have you been able to do any of your spring planting?

  • Yes
  • No
  • Almost

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4/23/2014 | Last Updated: 4:45 PM