Oregon Dairy Cattle Confirm First Highly Pathogenic Avian Influenza Detection
Milk from a Morrow County dairy in Oregon has tested positive for highly pathogenic avian influenza (HPAI), marking the first detection of the virus in Oregon dairy cattle. The preliminary detection was identified through Oregon’s routine statewide milk surveillance program, with initial results reported by the Oregon Veterinary Diagnostic Laboratory (OVDL) on November 6, 2026. The Oregon Department of Agriculture (ODA) promptly launched an on-farm investigation and submitted additional samples to the United States Department of Agriculture (USDA) National Veterinary Services Laboratory (NVSL) for confirmation, which was received on November 10, 2026. The affected dairy has been placed under quarantine, and enhanced biosecurity measures are now in effect. This quarantine restricts animal movement and implements additional disease control measures. No other affected dairies have been identified at this time, and pasteurized milk and dairy products are deemed safe for consumption, as pasteurization effective...
