KERVILLE, Texas - Two more cases of the New World screwworm have been confirmed in Texas, demonstrating the difficulty of stopping the spread of a pest that could potentially devastate the nation's cattle industry, the U.S. Department of Agriculture announced Monday.

The screwworm is actually a fly, which produces a larva that eats live flesh instead of dead material.

Females lay their eggs in open wounds of any warm-blooded animal such as cattle, but wildlife, pets and occasionally even humans can be infested.