Overview

• Mexico confirmed the first northern screwworm case on September 21 in Sabinas Hidalgo, Nuevo León.
• SENASICA warned in September that animals with infestations were passing inspections, a notice that local guilds say was minimized.
• The United States read the episode as a failure of Mexican sanitary governance and intensified scrutiny of trade.
• Ranchers report calf values falling by as much as 50 percent as feedlots buy at depressed prices while retail meat prices hold.
• Analyst César Rafael Ocaña Romo says a market of roughly 9 million calves worth over $5 billion remains distorted, with proposals circulating for tighter protocols, real traceability, and potential limits on Central American cattle entries.