Dossier
Zavala County, Texas
Coverage of Zavala County, Texas in the Nexus archive.
- New World Screwworm Reaches the US, Deepening Mexico’s Cattle Crisis
The USDA confirmed the first U.S. detection of New World screwworm in decades on June 3, 2026, in a bovine in Zavala County, Texas, indicating the parasite has spread north. The U.S. border remains mostly closed to Mexican live animals amid the crisis.
- New Mexico urges vigilance, still free of screwworm
New Mexico officials urge vigilance after the U.S. Department of Agriculture confirmed a New World screwworm case in Texas. New Mexico remains free of the screwworm, according to state health and wildlife authorities.