31 August 2026
The United States Department of Agriculture’s Animal and Plant Health Inspection Service (USDA APHIS) has confirmed the nation’s first documented cases of Highly Pathogenic Avian Influenza (HPAI) A(H5N1), Eurasian lineage, in captive American mink (Neovison vison).
The positive detections were confirmed on August 17, 2026, following sample collection on August 7 from six captive mink in Salt Lake County. While wildlife surveillance across North America has previously identified H5N1 in wild mustelids, including wild mink and river otters, this marks the first confirmed detection within a captive or farmed mink population in the United States. The cases were identified during active surveillance efforts across Utah, which have also placed multiple dairy herds under state quarantine.
The emergence of H5N1 in farmed fur-bearing mammals has drawn heightened scrutiny from global health authorities:
- Spain (2022): An outbreak at a mink farm in Galicia affected over 50,000 animals, providing the first documented evidence of mammal-to-mammal H5N1 transmission and escalating concerns regarding potential human adaptation.
- Finland (2023): The virus spread across 27 fur farms, infecting thousands of silver and blue foxes, American minks, and raccoon dogs with severe systemic disease.
