A ranch worker drives cattle to a corral for inspection for New World screwworm at a ranch in Cintalapa, Chiapas, Mexico, on July 23, 2025. AP Photo/Isabel Mateos

Texas is racing to contain a flesh-eating parasite that can infect animals and, more rarely, humans, causing horrific wounds that can be fatal if left untreated.

​The New World screwworm has infected three calves and a goat in Texas. Officials confirmed a fifth case in New Mexico involving a dog that traveled to Mexico on June 8.

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