STONY BROOK - A new report compiled by nonprofit groups set out to score food chains on the use of antibiotics in their meat products, and several popular eateries were given failing marks.

Dunkin' Donuts, Burger King and Starbucks were among 16 popular fast food chains that received a grade of F in the study.

The study gave nine of the restaurants surveyed passing grades, marking an improvement over last year. But many in the medical community say it's not good enough.

Dr. Saul Hymes, of Stony Brook University Hospital, says animals are being given the drug to make them grow faster and bigger, but he says the practice contributes to the growing epidemic of drug-resistant infections in humans. 

"The problem is the antibiotics that these animals are being given are the same antibiotics you or I would be given for strep throat or ear infection or pneumonia," Dr. Hymes says.

In response to a request for comment, Dunkin' Donuts tells News 12 that its policy prohibits suppliers from using antibiotics in healthy animals. Burger Kings says it is looking into the issue now, and News 12 has not yet received a response from Starbucks.