Could flesh-eating screwworms end up in your beef? USDA reveals risk level

The return of the New World screwworm, a flesh-eating parasite eradicated from the U.S. in the 1960s, has raised fresh concerns about whether it could threaten the nation's food supply.

Unlike other foodborne diseases like norovirus, E. coli and salmonella, which sicken millions of Americans every year, experts say the screwworm is not a threat to the food on our dinner tables.

"The U.S. food supply is not compromised by New World screwworm, which is an animal issue, but not a foodborne pathogen issue," Dr.