A report released by the US consumer and health groups has graded most top fast food chains in the US with 'F' for their antibiotic policies. The report has shown that on an average almost 70% of the antibiotics advantageous to human health are sold for use in meat and dairy production.

Consumer groups found that most of the fast food giants in the United States are still using meat from farm animals that have been majorly fed antibiotics. They also found that a majority of these fast food chains still don't have a plan to stop the practice.

The consumer and health groups in his report has graded most top fast food chains in the US with 'F' for the their antibiotic policies. Some of the top fast foods that got grade 'F' include Subway, Starbucks, KFC and Domino's Pizza and even Wendy's.

The figures released by the U.S. Centers for Disease Control and Prevention (CDC) suggest that nearly 2 million people are infected with drug resistant bacteria and almost 23,000 people die every year.

Groups didn't share their results with fast food giants before publishing; they rather decided the grading based on feedback from public, survey responses and correspondence with individual chains.

The top three fast food chains achieving an 'A' grading are Chipotle Mexican Grill and Panera Bread. Chick-fil-A got a 'B' in the report due to its progress toward its goal of only buying chicken raised without antibiotics by 2019.

Kari Hamerschlag, a lead author of the report who is senior program manager at Friends of the Earth said, "From bacon cheeseburgers to chicken nuggets, most meat served by America's chain restaurants comes from animals raised in industrial-scale facilities, where they are routinely fed antibiotics to prevent disease that is easily spread in crowded, unsanitary, stressful conditions".