Highly Pathogenic Avian Influenza (HPAI)
Have sick birds?
Please, monitor your birds for the following symptoms:
- Trouble breathing
Example of twisted neck (PC: Pamela Hullinger). - Clear, runny discharge from nose, mouth, and eyes
- Lethargy or lack of energy
- Loss of appetite
- Drinking less
- Swollen eyes, head, wattles, or combs
- Discolored or bruised comb, wattles, or legs
- Stumbling, falling, or twisted neck
- Sudden death
HPAI Maps
The maps below were created by our lab also using data from USDA and the California Department of Food and Agriculture (CDFA). In other words, these maps include both domestic and wild bird cases.
Last updated February 21, 2023.
Latest Updates
Check out these links regularly to get the latest updates:
- USDA updates
- CDFA updatesCalifornia Department of Food and Agriculture (CDFA)
- Track 2022 avian influenza outbreaks
- Letter from California Department of Public Health regarding poultry industry Influenza vaccinations
Confirmed Cases
February 6, 2023:
HPAI Confirmed in a Commercial Flock in Merced County and Backyard Flocks in San Joaquin and Placer Counties.
January 26, 2023:
HPAI Wild Bird Detection in Santa Barbara County.
January 10, 2023:
HPAI Confirmed in Backyard Flocks in San Joaquin and Sonoma Counties.
January 4, 2023:
HPAI Wild Bird Detection in Imperial County.
Biosecurity
An Activity about Disease Transmission - Dr. Rodrigo Gallardo
Disease Transmission and Practical Biosecurity - Dr. Maurice Pitesky
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Backyard Poultry Disease Basics (RootSimple Podcast)
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Isolation and Quarantine (UCD)
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Preparing for Highly Pathogenic Avian Influenza (ChickenWhisperer - UCD)
2022 Archived Cases
Highly Pathogenic Avian Influenza (HPAI) Confirmed in a Commercial Flock in Glenn County and Detected in a Wild Bird in San Joaquin County.
December 19, 2022:
Highly Pathogenic Avian Influenza (HPAI) Confirmed in a Backyard Flock in Mendocino County.
December 16, 2022:
HPAI Confirmed in a Backyard Flock in Butte County.
December 14, 2022:
HPAI Wild Bird Detection in Del Norte County.
December 12, 2022:
HPAI Wild Bird Detection in Amador County.
December 6, 2022:
HPAI Wild Bird Detections in Sutter and Yuba Counties.
November 16, 2022:
HPAI Wild Bird Detection in Kern County.
November 10, 2022:
HPAI Wild Bird Detection in Humboldt County
November 8, 2022:
HPAI Wild Bird Detection in Merced County
November 4, 2022:
HPAI Detected in a Backyard Flock in San Diego County and in Wild Birds in Contra Costa, San Bernardino, Shasta, and Ventura Counties
October 18, 2022:
HPAI Detections in Wild Birds in San Diego, Riverside, San Luis Obispo, San Benito, Marin, and Lassen counties in California
October 12, 2022:
HPAI Detection in Wild Birds in Los Angeles County and Orange County, California County
- Highly Pathogenic Avian Influenza (HPAI) Eurasian strain H5N1 has been detected in wild birds in Los Angeles and Orange Counties.
- HPAI H5N1 can infect and cause high mortality in both wild and domestic birds, including backyard and commercial flocks. Symptoms in wild birds range from asymptomatic to severe disease and death, depending on the species infected.
October 4, 2022:
Highly Pathogenic Avian Influenza (HPAI) Detected in Stanislaus County, Monterey County, and Del Norte County
September 29, 2022:
Highly Pathogenic Avian Influenza (HPAI) Detected in a Backyard Flock in Calaveras County
September 23, 2022:
Highly Pathogenic Avian Influenza (HPAI) in wild birds in three additional counties: Fresno, San Francisco, and Santa Cruz
September 13, 2022
HPAI detected in a backyard flock in El Dorado County
August 30, 2022
HPAI detected in a commercial flock in Sacramento County
Letter from California Department of Public Health regarding poultry industry Influenza vaccinations
August 22, 2022
Highly Pathogenic Avian Influenza (HPAI) Detected in Fresno and Contra Costa Counties
August 11, 2022
Avian Influenza detected in multiple CA counties, including Sacramento county
July 29, 2022
Avian Influenza detected in Sonoma county, CA
July 15, 2022
Highly Pathogenic Avian Influenza detected in wild birds in California
July 8, 2022
USDA Confirms Highly Pathogenic Avian Influenza in Nevada
- Backyard flock near Carson City, NV tested positive for HPAI
- It is recommended to house birds indoors where possible
June 9, 2022
HPAI still being detected in wild birds although rates continue to decrease
- Avian influenza confirmed in 3 nestling cormorants in Scottsdale park
- Arizona Department of Agriculture announcement
May 6, 2022
USDA confirms Highly Pathogenic Avian Influenza in backyard chicken flocks in Oregon and Washington
April 29, 2022:
The first human case of avian flu in the U.S. is detected in Colorado.
Person Had Contact with Infected Poultry; Public Health Risk Assessment Remains Low
March 16, 2022:
HPAI confirmed in Pacific Flyway region.
- HPAI confirmed in Pacific Flyway region; West on alert
- Oregon Department of Agriculture (ODA) prepares as highly pathogenic avian influenza is confirmed in the Pacific Flyway
February 23, 2022:
The California State Veterinarian has imposed a quarantine and additional entry requirements on all live poultry, hatching eggs and poultry products originating from an area affected by an HPAI outbreak and entering California. See infographic.