ALL Avian Influenza Findings Update v2

ALL Findings

Update on Avian Influenza Findings
Poultry Findings Confirmed by USDA’s National Veterinary Services Laboratories

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Detections Reported
Birds Affected
First Detection Reported
Last Detection Reported

Full List of Detections by State - 2016

State Flyway Confirmed Detections Last Detection Reported Total Birds

Since December 2014, the United States Department of Agriculture has confirmed several cases of highly pathogenic avian influenza (HPAI) H5 in the Pacific, Central, and Mississippi flyways (or migratory bird paths). The disease has been found in wild birds, as well as in a few backyard and commercial poultry flocks. The Centers for Disease Control and Prevention (CDC) considers the risk to people from these HPAI H5 infections to be low. No human cases of these HPAI H5 viruses have been detected in the United States, Canada, or internationally.

* References to EA and AM under avian influenza subtype indicate  Eurasian and American strains of the virus.

Captive Wild Bird Findings Confirmed by USDA’s National Veterinary Services Laboratories:

State County Species Avian influenza subtype* Confirmation date
MT Flathead Captive gyrfalcon EA/AM-H5N2 March 27, 2015
MO St. Louis Captive falcon (hybrid) EA/AM-H5N2 March 27, 2015
ID Kootenai Captive gyrfalcon (2) EA-H5N8 January 29, 2015
ID Canyon Captive falcons,
Great horned owl
EA/AM-H5N2 January 16, 2015
WA Whatcom Captive gyrfalcon EA-H5N8 December 14, 2014

* References to EA and AM under avian influenza subtype indicate  Eurasian and American strains of the virus.

Wild Bird Findings confirmed by USDA’s National Veterinary Services Laboratories are available here.

Surveillance for avian influenza is ongoing in commercial poultry operations, live bird markets, and in migratory wild bird populations.

USDA is coordinating closely with its partners, including Arkansas, California, Idaho, Kansas, Minnesota, Missouri, Nevada, Oregon, Utah and Washington State officials, the U.S. Department of the Interior and the U.S. Department of Health and Human Services, on avian influenza surveillance, reporting, and control efforts.  The United States has the strongest AI surveillance program in the world, where we actively look for the disease and provide 100% compensation to affected producers to encourage reporting.

USDA continues to inform OIE and international trading partners of these findings.  USDA is working with trading partners to minimize trade impacts on poultry and poultry products as much as possible.

All bird owners, whether commercial producers or backyard enthusiasts, need to continue practicing good biosecurity, preventing contact between their birds and wild birds, and reporting sick birds or unusual bird deaths to State/Federal officials, either through your state veterinarian or through USDA’s toll-free number at 1-866-536-7593.  Additional information on biosecurity for backyard flocks can be found at

USDA emphasizes that poultry, poultry products and wild birds (see biosecurity and wild birds) are safe to eat if they are properly handled and cooked to a temperature of 165 degrees Fahrenheit.

Background Information

The H5N8 virus originated in Asia and spread rapidly along wild bird migratory pathways during 2014, including the Pacific flyway.  In the Pacific flyway, the H5N8 virus has mixed with North American avian influenza viruses, creating new mixed-origin viruses.  This is not unexpected.  These mixed-origin viruses contain the Asian-origin H5 part of the virus, which is highly pathogenic to poultry.  The N parts of these viruses came from North American low pathogenic avian influenza viruses.

USDA has identified two mixed-origin viruses in the Pacific Flyway: the H5N2 virus and new H5N1 virus.  The new H5N1 virus is  not the same virus as the H5N1 virus found in Asia that has caused some human illness.  CDC considers the risk to people from these HPAI H5 infections to be low.  Detailed analysis of the virus is underway in cooperation with CDC.

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