BEYOND THE BARN:
Reports of the New World screwworm returning to the United States have raised concern. Driven northward from Central America and expanding across our southern borders, this parasitic fly has officially reemerged after a 44-year absence, according to the U.S. Department of Agriculture (USDA).
While ranchers and veterinarians know the parasite as a threat to cattle, the idea of a flesh-eating fly lar…