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42m ago

Mexico Intercepts Treated Screwworm Case in Nuevo León as USDA Dispatches Team

The dead larvae after mandatory double treatment prompted an incursion protocol with independent U.S. verification.

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El becerro afectado provenía del sur-sureste del país y formaba parte de un embarque de 85 bovinos. | Crédito: canva y @Agricultura_mex

Overview

  • The Secretariat of Agriculture confirmed a second Nuevo León detection in Montemorelos from a south‑southeast shipment, with larvae found dead or moribund after ivermectin and a larvicidal bath.
  • All 85 cattle in the lot were treated and inspected, only one animal was affected, and SENASICA activated the incursion response and notified APHIS‑USDA.
  • USDA Secretary Brooke Rollins said the Nuevo León finding may be an isolated incident and announced personnel will verify on site, deploy trapping, bolster surveillance, and release sterile flies.
  • Officials said the Montemorelos case is unrelated to the Sept. 20 Sabinas Hidalgo detection, which was declared officially controlled on Oct. 5 after tracing, wound treatment, trapping, and sterile‑fly dispersal.
  • SENASICA has recorded 6,703 confirmed animal cases nationwide through Sept. 13 concentrated in southern states, with Yucatán up to 658 cases across 77 municipalities, while states like Guanajuato run drills and maintain 15 highway checkpoints with no detections.