Following an investigation by the California Department of Food and Agriculture (CDFA) and rapid disease detection by California Animal Health and Food Safety Laboratory System (CAHFS), the U.S. Department of Agriculture’s (USDA) National Veterinary Services Laboratories (NVSL) has confirmed H5N1 Bird Flu in 183 dairy farms in the last 30 days in California. Since California’s first detection of H5N1 Bird Flu in dairies, there have been a total of 703 infected dairies with 100 of those affected, fully recovered and released from quarantine. All quarantine released dairies will be placed on a surveillance list for weekly testing through creameries to maintain continued monitoring of the virus in California.
Bird Flu in Humans
For the most up to date data on bird flu cases in California, please visit CDPH’s Current Bird Flu Situation dashboard. While the risk to the general public remains low, additional human cases of bird flu are expected to be identified and confirmed in California. CDPH recommends that personal protective equipment (PPE), such as eye protection (face shields or safety goggles), respirators (N95 masks), and gloves be worn by anyone working with animals or materials that are infected or potentially infected with the bird flu virus. Wearing PPE helps prevent infection. Please see CDPH’s Please see CDPH’s Worker Protection from Bird Flu for full PPE guidance. For the latest updates from CDPH, visit Bird Flu (ca.gov). If you have any questions, comments or concerns, you can submit an inquiry directly to CDPH.
National Detections
This nationwide outbreak of H5N1 Bird Flu began in poultry in 2022 and was first detected in US dairy cattle in March 2024. All national detections in cattle can be found on the USDA website at: HPAI Confirmed Cases in Livestock | Animal and Plant Health Inspection Service (usda.gov) and all national detections in poultry can be found on the USDA website at: Confirmations of Highly Pathogenic Avian Influenza in Commercial and Backyard Flocks | Animal and Plant Health Inspection Service (usda.gov)
Inquiries?
For public inquiries regarding highly pathogenic avian influenza in California, please send an e-mail to cdfa.HPAIinfo@cdfa.ca.gov or call 916-217-7517. For media inquiries, please call 916-654-0462 or send an e-mail to OfficeOfPublicAffairs@cdfa.ca.gov.
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