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Two Screwworm Cases Confirmed Near South Texas Border

USDA and Texas authorities have put a roughly 20-kilometre animal movement ban in place to try to stop the parasite from becoming established and threatening local herds and trade.

Overview

  • Federal teams began investigating a suspected screwworm detection in south Texas after Mexican outbreaks and confirmed a second case in a one-month-old calf roughly 9 kilometres from the first detection.
  • USDA field crews collected samples and sent them to the National Veterinary Services Laboratories in Ames, Iowa, for laboratory confirmation as officials raced to identify and treat affected animals.
  • Authorities established a roughly 20-kilometre controlled zone around the detections and halted animal movements inside that area to limit spread and allow targeted treatment and surveillance.
  • Ranchers and veterinarians face immediate animal-health and economic pressures because screwworm larvae consume living tissue, and analysts warn that an unchecked outbreak could cause heavy losses for Texas cattle producers.
  • The response leans on the U.S. precedent of eradicating screwworm in the 1960s using a sterile-insect method, and officials say containing these early cases is the key next step while they monitor nearby outbreaks in Mexico.