USDA agency protecting animal, plant health and welfare
The New World screwworm re-emerged in Texas after decades of eradication, with a calf found in La Pryor marking the first U.S. cattle case since the 1960s. Authorities are deploying sterile flies, expanding production, and tightening cross-border controls as Canada imposes imports limits and additional cases emerge in Texas.
The New World screwworm has re-emerged in the U.S., with cases detected in Texas and New Mexico, triggering cross-border restrictions and a major USDA response. Authorities are deploying sterile flies to suppress the pest while preparing additional facilities, amid high beef prices and a fragile cattle herd.