date:Apr 27, 2012
but the incident should not affect the US beef exports, Clifford added.
USDA noted that the carcass of the infected cow is under quarantine and would be destroyed.
Cows can contract the mad cow disease spontaneously in rare cases; however, the disease cannot be transmitted unless the brain or spinal tissue is consumed by humans, according to scientists.
Mad cow, or Bovine Spongiform Encephalopathy, is considered to cause Creutzfeldt-Jakob - a deadly brain disease variant, in humans who consume