Yesterday, September 21, the USDA announced that Mexico’s National Service of Agro-Alimentary Health, Safety, and Quality (SENASICA) confirmed a new case of New World screwworm (NWS) in Sabinas Hidalgo, Nuevo León—less than 70 miles from the U.S.-Mexico border.
According to USDA, this detection marks the northernmost case of NWS to date in the current outbreak and represents the most significant threat yet to the American cattle and livestock industry. Sabinas Hidalgo is located on the major Monterrey–Laredo highway, one of the busiest commercial routes in the world.
At this time, U.S. ports remain closed to imports of cattle, bison, and horses from Mexico. USDA is continuing surveillance efforts, with nearly 8,000 traps across Texas, Arizona, and New Mexico and over 13,000 screening samples collected to date—none of which have detected NWS flies.
EWA remains actively engaged in these efforts through our participation on the Texas NWS Response Team, established by Governor Greg Abbott, and as a member of the Screwworm Coalition of Texas. We will continue to share important updates, challenges, and developments with our members as they unfold.
📄 You can read the full USDA report here: https://www.usda.gov/about-usda/news/press-releases/2025/09/21/mexico-confirms-case-new-world-screwworm-nuevo-leon