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 parasitic fly whose maggots can infest living livestock, birds, pets and humans, could threaten California soon. The New World Screwworm has rapidly spread northward from Panama since 2023 and ...

The U.S. has blocked imports of live cattle, horses, and bison through southern border ports following the resurgence in Mexico of the New World Screwworm, a parasitic fly that infects animals and ...

This is read by an automated voice. Please report any issues or inconsistencies here. California health officials warn that the New World Screwworm could arrive in the state from an infested traveler ...