Three more cases of the New World screwworm have been confirmed, including one outside the main cluster in Texas, demonstrating the difficulty of stopping a resurgent pest that could devastate the nation’s cattle industry, the U.S. Department of Agriculture announced Monday.

The screwworm is actually a fly larva that eats living flesh instead of dead material. The flies lay their eggs in open wounds of animals like cattle, but wildlife, pets and occasionally even humans can be infested. The government has a program to breed sterile male flies and drop swarms of them from planes to mate with wild females, which kept screwworm contained at the southern end of Panama for decades.

So far, there are five confirmed cases: three calves and a goat in Texas and a dog from neighboring Lea County, New Mexico. The small dog, which the USDA initially reported as a Texas case, lives in New Mexico and was reclassified as the first in that state.

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Great, just what we need