10/06/13 15:06:15
どうぞよろしくお願いします
"We have tested 800,000 cattle in recent years and have not found any evidence of BSE circulating in the herd," Parker said.
But others remain concerned.
"I still think you need to totally restrict using any ruminant protein in feed that gets back to ruminants," said Linda Detwiler, a food safety consultant and former U.S. Department of Agriculture veterinarian.
Prohibiting high-risk tissues as a feed source makes the chances of transmitting mad cow disease through poultry litter low but does not remove all risk, Detwiler said.
The practice also makes McDonald's, one of the nation's biggest beef purchasers, nervous. "We do not condone the feeding of poultry litter to cattle," it said in a statement.