New World screwworm updates
October 2, 2025
•On Sept. 21st, New World screwworm (NWS) was confirmed 70 miles from the U.S. border,
•Secretary of Agriculture Brooke Rollins reported on Sept. 22nd that 80,000 sterile flies were released on “spot” and nearly 200 surge staff had been deployed to Mexico.
•According to Reuters, Mexican’s agriculture ministry said there is no risk of adult screwworm fly emergence due to the early detection of the infected bovine, which was confirmed on Sept. 21. The infected animal was in a shipment of 100 animals originating from the Gulf Coast state of Veracruz, according to the statement. Fly traps in northern Mexico have not detected a single screwworm fly.
•Texas Department of Agriculture has announced they will begin using a bait in conjunction with the ongoing efforts of distributing the sterile flies to fight NWS. TDA Swormlure is a state-of-the-art attractant using proprietary polymer and chemical blend. It mimics the smell of rotting flesh, which uniquely targets the New World screwworm with little impact on other insects and wildlife. It can be rapidly deployed across Texas, providing ranchers and veterinarians with an early-warning system to detect and halt screwworms before they spread.
•The U.S. Mexico Border remains closed to cattle trade, which is a loss of approximately 26, 000 imported cattle weekly, which greatly affects the beef supply and is leading to higher consumer prices. It is estimated as a 18% reduction in cattle placements in the Southern plains.