The USDA has banned only one E. coli strain from foodsupplies since a serious 1993 outbreak linked to Jack in the Box hamburgers. The agency has passed a ban on six more E. coli strains that is slated to begin in June. Read related article.

Source: Federal Safety and Inspection Service, USDA, Estimates from the Centers for Disease Control and Prevention | The Washington Post May 11, 2012
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