New World screwworms are nearing the U.S. border, raising concerns about the parasite's return to American soil.

A type of flesh-eating maggot is making a comeback — and it’s creeping toward the United States. The new world screwworm is a blowfly whose larvae burrow into animal wounds and gorge on living tissue.

A flesh-eating maggot that had been eradicated in the U.S. and parts of Central America is back and could potentially threaten Louisiana cattle, experts in the beef industry are warning. Due to the ...

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