Cochliomyia hominivorax, the New World screwworm fly, or simply screwworm or screw-worm, is a species of parasitic blowfly whose larvae eat the living tissue of warm-blooded animals. It is present in the New World tropics. From Wikipedia
The USDA enforces a rolling suspension of live animal imports after detections of the parasitic fly advance 700 miles from the US border.
