Cows at three California dairies located in the Central Valley have tested positive for highly pathogenic avian influenza (HPAI).
When herds began showing clinical signs consistent with HPAI on August 25, 2024, the dairy owners worked with their veterinarians and the California Department of Food and Agriculture (CDFA) to submit samples to the California Animal Health and Food Safety (CAHFS) laboratory network for preliminary determination. The samples were then submitted to the National Veterinary Services Laboratory (NVSL), where the test results were confirmed today.
No human cases of HPAI have been confirmed in California related to this incident. The California Department of Public Health (CDPH) is working in collaboration with CDFA and will work with local health departments to monitor any individuals who may be exposed to infected animals to ensure prompt clinical and public health interventions, and CDPH would provide official confirmation of any human cases associated with this incident. Read more