E.U.A. reinforcement of protection against the New World larva

The New World screwworm (NWS, Cochliomyia hominivorax) is a devastating pest. When the larvae of the NWS fly burrow into the flesh of a living animal, they cause severe and often fatal damage. The NWS can infest livestock, pets, wildlife, occasionally poultry, and in rare cases, even humans. Although the NWS has been eradicated from the United States for decades, recent detections in Mexico, as far north as Oaxaca and Veracruz — about 1,100 kilometers from the U.S. border — led to the immediate suspension, on May 11, 2025, of imports of live cattle, horses, and bison through ports of entry along the southern border. As of October 17, no NWS has been detected in animals or traps in the United States. The U.S. Department of Agriculture (USDA) continues to make significant progress in implementing its comprehensive five-pronged plan to protect the nation's livestock, wildlife, and agricultural communities from the threat of NWS. The USDA is deploying intensive surveillance and ...