Avian Influenza

2023-10-30: HPAI positive cases in Monterey & Merced counties

                 Oct. 30, 2023

Urgent:  After 2+ months of being free of Highly Pathogenic Avian Influenza (HPAI), California has a positive case.  The last case was a detection in wild birds in Monterey county.  The current case involves a commercial flock in Merced county.

While the HPAI risks from migrating waterfowl have long been known, more and more wild bird species are being infected with virus.   All poultry owners must increase their biosecurity efforts.

                                            -Dr. Bradley


2023-03-13: Avian Science Notes March newsletter

Avian Science Notes - March 2023

2023   Avian Bowl State Qualifier

Photo Caption: The 2023 California Senior Avian Bowl Champions – Duck, Duck, Goose from Merced, Contra Costa, and Sonoma Counties

Left to Right: Dr. Bradley, Rylin Gamble, Chloe Hausmann, and Tuilerie Gayeton

2022-10-25: More confirmed HPAI cases

       My thanks to United Egg Producers (UEP) for sharing the following.   Over the past 6 days, Animal and Plant Health Inspection Service (APHIS) has reported 26 confirmations of Highly Pathogenic Avian Influenza (HPAI).   Most of the confirmations were from backyard flocks.    The fall migration is continuing.    All bird owners should assume that the virus is present in wild birds.

                                                                               -Dr. Bradley

2022-08-20: Positive HPAI cases and the counties impacted, continues to increase

      Thanks to our State Veterinarian, Dr. Jones, for keeping us informed.   Cases of Highly Pathogenic Avian Influenza (HPAI) unfortunately are on the increase.  They are no longer restricted to wild birds, backyard flocks have tested positive as well.  I will continue to tell my readers what I have been saying for decades:  protect your birds - keep them under a solid cover!  

       From Dr. Jones:

2022-07-21: Alert - HPAI is in California

     Dr. Annette Jones, our State Veterinarian, informed me today that HPAI has been confirmed in a WILD Canada goose in Sonoma County.   This is addition to positives in wild waterfowl in Colusa County.  Keep your birds indoors or under a SOLID cover.

             -Dr. Bradley

2022-07-08: Highly Pathogenic Avian Influenza (HPAI) confirmed in Carson City, Nevada

Highly Pathogenic Avian Influenza (HPAI) confirmed in Carson City, Nevada

   Want you to have the important announcement and directive below from our State Veterinarian, Dr. Jones.

                                           Be very careful with your birds,

                                            Dr. Bradley

“USDA confirmed that a backyard flock near Carson City, NV tested positive for HPAI.  There is also a mortality event in wild birds in Butte County, CA and preliminary findings suggest HPAI.  

2022-05-18: Avian Science Notes May newsletter

In this Issue:



Smiles, lively visiting, and cheers were all part of the gathering for the 2022 California Avian Bowl State Qualifier.   Teams came from all over the state to compete.   However, many competitors and families first caught up with old friends, not seen since the start of the pandemic.

2022-04-04: Highly Pathogenic Avian Influenza (HPAI) cases getting closer to California

    Thanks to Kevin Simmons (National Poultry Improvement Plan Coordinator, Arkansas) I am able to share this map with you.   No longer are the confirmed cases far, far away.   You can easily see that there are new cases in the west.   Please also note that BACKYARD and commercial flocks alike are being infected.   I will say it again: keep your birds under solid cover and practice the best biosecurity you can.

                                              -Dr. Bradley

2022-03-03: Highly Pathogenic Avian Influenza (HPAI) update

Highly Pathogenic Avian Influenza (HPAI)  is now on our coast.   The OIE (also known as the World Organization for Animal Health) has confirmed that HPAI  has been isolated on the west coast of the United States.   A bald eagle that died in Vancouver, BC was positive for HPAI.