The Kroger Co. (NYSE: KR) yesterday said it is cooperating with a ground beef recall announced by American Foods Group, Inc., a wholesale meat supplier based in Green Bay, Wisconsin. American Foods announced the recall as a precautionary measure after the U.S. Department of Agriculture (USDA) detected the presence of Escherichia coli O157:H7 (E. coli) bacteria in a sample of beef processed by American Foods.