WASHINGTON, Dec. 26 (UPI) -- The investigation to trace down the origins of the first case of mad cow disease in the United States could take weeks to months and ultimately may be unable to determine where the animal came from or how it became infected, federal officials said Friday.

WASHINGTON, Dec. 24 (UPI) -- Senator Tom Harkin, the ranking member of the Senate Agriculture, Nutrition and Forestry Committee, plans to examine the actions of the U.S. Department of Agriculture and the Food and Drug Administration relating to the first documented case of mad cow di

WASHINGTON, Sept. 27 (UPI) -- A panel of pharmaceutical industry experts Friday dismissed concerns by public health officials and said using antibiotics in pigs, cows and other food animals does not significantly increase the health risk for people eating the meat. The Food and Drug A