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http://www.cnn.com/2008/HEALTH/02/17/usdabeef.recall.ap/index.html?iref=newssearch
USDA orders recall of 143 million pounds of frozen beef
“…Federal regulations call for keeping downed cattle out of the food supply because they may pose a higher risk of contamination from E. coli, salmonella or mad cow disease because they typically wallow in feces and their immune systems are often weak…”
광우병과 개연성이 전혀 없다고는 할 수 없을 것 같습니다. (그러니까, downer가 발생하는 원인 중에 광우병도 포함된다…)