U.S. Secretary of Agriculture Brooke L. Rollins has announced an immediate suspension of live cattle, horse, and bison imports through U.S. ports of entry along the southern border. This decision comes in response to the rapid northward spread of New World Screwworm (NWS) in Mexico, with detections as far north as Oaxaca and Veracruz.
Despite ongoing efforts by the United States and Mexico to combat NWS, its advancement necessitates further action. The USDA Animal Plant Health Inspection Service (APHIS), alongside Customs and Border Protection (CBP), will enforce this import suspension on a monthly basis until containment is achieved. "The United States has ordered the suspension of livestock imports through ports of entry along our southern border after the continued spread of the New World Screwworm in Mexico," stated Secretary Rollins.
Livestock currently held for entry into the U.S. will undergo standard inspection procedures to ensure they are free from NWS infestation. Secretary Rollins emphasized that protecting the livestock industry is crucial: "The protection of our animals and safety of our nation’s food supply is a national security issue of the utmost importance."
Efforts towards eradication include active field surveillance, controlled animal movement, and sterile insect dispersal. The USDA is also utilizing Tick Riders to monitor for NWS presence along the southern border region.
The first case of NWS in Mexico was reported in November 2024, leading to initial border closures for live animal trade. Imports resumed in February 2025 following a pre-clearance inspection protocol agreement between APHIS and Mexico. However, recent developments have prompted renewed restrictions.
For more information on affected regions and trade restrictions, visit the USDA APHIS Animal Health Status of Regions website.
