A phased restart at Douglas, Arizona ties cattle-market access to inspection and Mexico compliance.

Cattle trade across the United States-Mexico border is moving into a new, controlled phase as the U.S. Department of Agriculture begins reopening southern ports while maintaining New World screwworm safeguards. For producers, importers and feedlot operators, the change matters because it starts to restore a key supply route without treating disease control as an afterthought.

USDA announced on 24 July that the Douglas, Arizona, port of entry would reopen to cattle trade from 24 August 2026. The agency said the reopening is contingent on Mexico adhering to the Joint Action Plan, while operational work would begin for later openings at Santa Teresa, New Mexico, and Columbus, New Mexico. Every animal entering through these ports is to receive a full USDA inspection for signs of New World screwworm.

The design is commercially consequential. A broad closure can disrupt cattle flows, alter procurement options and add uncertainty for businesses that depend on predictable cross-border movement. A phased reopening offers a route back to trade, but it also puts inspection capacity and compliance at the centre of the operating model. That can mean more process at the border, yet it reduces the risk that a restart becomes a weak point in animal-health protection.

New World screwworm is not simply a veterinary issue. The parasite can affect livestock and its response can shape movement rules, handling practices and market access. USDA has therefore linked the reopening to a bilateral disease-control framework rather than presenting it as a stand-alone trade decision. The approach gives Mexican compliance a direct bearing on the pace of normalisation.

For cattle businesses, the immediate signal is measured rather than absolute: Douglas has an announced starting point, while the next two ports remain subject to operational steps. Producers and buyers will need to watch inspection requirements, port sequencing and official disease updates as closely as price signals. The economic benefit of reopening will depend on whether those controls keep trade moving reliably while containing animal-health risk.

For further info: USDA Animal and Plant Health Inspection Service .