These guidelines will be effective immediately through Aug. 01, 2026 (Notification Due to a New World Screwworm Detection in TEXAS) On June 03, 2026 at 8:24 pm, the USDA issued the notification below, advising that a New World Screwworm (NWS) infestation was confirmed in Zavala Count y in south Texas. The following movement guidelines will be placed on LARGE ANIMAL movements from Texas to Kentucky. Learn more about screwworm here. Read more about transportation guidelines by