McDonald's, Burger King, Five Guys among 22 burger chains given "F" over antibiotics

Twenty-two of the top 25 U.S. burger chains – including McDonald's, Burger King, White Castle and Five Guys – received a failing grade in a review assessing their practices and policies on antibiotics use in their beef products. Only two chains were given an "A" rating. The scores were published Wednesday in a report called "Chain Reaction IV: Burger Edition," which was produced by the Center for Food Safety, Consumer Reports, Food Animal Concerns Trust, U.S. PIRG Education Fund, Friends of the Earth, and Natural Resources Defense Council.

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