California - Avian influenza in poultry 2024-2026

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https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/commercial-backyard-flocks

 

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https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/commercial-backyard-flocks

 

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https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/commercial-backyard-flocks

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Avian Influenza Alert​

November 4, 2026: Highly Pathogenic Avian Influenza (Bird Flu) Detected in a Backyard Flock in San Benito County

Sacramento, CA – The California Department of Food and Agriculture (CDFA) reports a new detection of highly pathogenic avian influenza (HPAI) in a backyard flock in San Benito County, confirmed by the U.S. Department of Agriculture’s National Veterinary Services Laboratories (NVSL) on November 3, 2026.

Since October 5, 2026, California has confirmed seven (7) HPAI detections, including six (6) backyard flocks and one (1) commercial flock, across four counties: Sacramento, Solano, Stanislaus, and San Benito. Movement restrictions are currently in place for Stanislaus County only.

CDFA continues to work with affected flock owners to reduce the risk of disease spread. HPAI has also been detected in wild birds across California. Infected wild birds can introduce the virus to domestic poultry through direct contact or by contaminating the environment. Poultry owners are strongly encouraged to maintain enhanced biosecurity measures.
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CDFA - Animal Health - Avian Influenza

www.cdfa.ca.gov

 

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https://www.aphis.usda.gov/livestock-poultry-disease/avian/avian-influenza/hpai-detections/commercial-backyard-flocks