Sentence:  In 1987, when the pathogen was discovered in <WSD>commodity meat</WSD>, causing four deaths in two institutions in Utah, the USDA decided that the meat need not be sampled or recalled, because it was "safe" if "cooked properly" ... 
Meaning of the word marked with <WSD> tags:  Meat that is produced and distributed on an industrial scale, and can be bought and sold on the commodity markets