“‘The screwworm is a potentially devastating animal disease that sends shivers down every ranchers spine,’ Florida Commissioner of Agriculture Adam Putnam said. ‘It’s been more than five decades since the screwworm infested Florida, and I’ve grown up hearing the horror stories from the last occurrence.’
New World screwworms are the maggots of blowflies that live inside livestock and people. Warm blooded animals, including humans and their pets, infested with screwworm usually show signs of discomfort and itching. If the infection affects the mouth or lungs, it can be incapacitating.”
Source: Flesh-eating screwworms return to U.S. | PBS NewsHour
