On Jun. 30, 2025, the U.S. Department of Agriculture (USDA) announced risk-based port re-openings for cattle, bison, and equines from Mexico beginning as early as July 7, 2025. The USDA, following extensive collaboration between USDA Animal and Plant Health Inspection Service (APHIS) experts and their counterparts in Mexico to increase New World Screwworm (NWS) surveillance, detection, and eradication efforts, are set to begin a phased reopening of the southern ports starting with Douglas, Arizona.

Progress has been made in several critical areas since the ports were closed on May 11^th, including: resolution of challenges with conducting flights in Mexico that has allowed our team to consistently conduct sterile NWS fly dispersal 7 days each week and dispersal of more than 100 million flies each week. We also sent five teams of APHIS staff to visit/observe and gain a deeper understanding of Mexico’s NWS response and allow us the opportunity to share our feedback. We have not seen a notable increase in reported NWS cases in Mexico, nor any northward movement of NWS over the past eight weeks.

While the Douglas, AZ port presents the lowest risk based upon the geography of Sonora and a long history of effective collaboration between APHIS and Sonora on animal health issues, USDA intends to reopen additional ports in New Mexico, and if it is proven safe to do so, in Texas, over the coming weeks. Additional port openings will be based on APHIS’ continuous reevaluation of the number of cases and potential northward movement of NWS, Mexico’s continued efforts to curb illegal animal movements, and implementation of further rigorous inspection and treatment protocols.