June 7, 2026 / Lucio Vasquez |The Texas Newsroom [[{“value”:” The confirmation of a New World screwworm case in a South Texas calf on Wednesday has triggered an aggressive state and federal response aimed at preventing the flesh-eating parasite from becoming established in the United States once again. The fly’s larvae feed on the living tissue of warm-blooded animals, including livestock, wildlife and pets and, in rare cases, humans.