A nationwide study published by the USDA in 1996 found that 7.5 percent of the ground beef samples taken at processing plants were contaminated with Salmonella, 11.7 percent were contaminated with Listeria monocytogenes, 30 percent were contaminated with Staphylococcus aureus, and 53.3 percent were contaminated with Clostridium perfringens.
( Eric Schlosser )
[ Fast Food Nation: The Dark ]
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