How did New World screwworm come to the United States?
New World screwworm flies at a sterile screwworm fly production facility in Metapa, Mexico. (Mauricio Palos/Bloomberg) July 7, 2026 5:00 pm, EDT key takeaways: New World screwworms have been detected in 32 animals in Texas since the beginning of last month, the first US livestock case in nearly five decades. Officials and experts say the
