Dept of Ag Shuts Down U.S. Southern Border Ports to Livestock Trade Due to Screw Worm Spread Through Mexico

Announcement from Secretary of Agriculture, Brooke Rollins: “I have ordered an immediate shutdown of live cattle, bison, and horse trade through the southern U.S.–Mexico border. This decisive action comes after Mexico confirmed another case of New World Screwworm in Veracruz.”

(Washington, D.C., July 9, 2025)– Yesterday, Mexico’s National Service of Agro-Alimentary Health, Safety, and Quality (SENASICA) reported a new case of New World Screwworm (NWS) in Ixhuatlan de Madero, Veracruz in Mexico, which is approximately 160 miles northward of the current sterile fly dispersal grid, on the eastern side of the country and 370 miles south of the U.S./Mexico border.

This new northward detection comes approximately two months after northern detections were reported in Oaxaca and Veracruz, less than 700 miles away from the U.S. border, which triggered the closure of our ports to Mexican cattle, bison, and horses on May 11, 2025.

[…] Therefore, in order to protect American livestock and our nation’s food supply, Secretary Rollins has ordered the closure of livestock trade through southern ports of entry effective immediately. (read more)