Government Is Checking Possible Case of Mad Cow

The government is checking a possible case of mad cow disease in the United States in an animal previously cleared of being infected, the Agriculture Department said Friday.
Agriculture Secretary Mike Johanns said that additional tests were needed to confirm the disease and that the animal had not entered the food supply.
One case of mad cow disease has been confirmed in the United States, in a dairy cow in Washington State in December 2003. Since then, preliminary tests have indicated the existence of the disease in three cows, but further testing had ruled out mad cow disease.