how many states have bird flu

Wild birds can be infected with HPAI and show no signs of illness. They can carry the disease to new areas when migrating, potentially exposing domestic poultry to the virus. APHIS’ wild bird surveillance program provides an early warning system for the introduction and distribution of avian influenza viruses of concern in the United States, allowing APHIS and the poultry industry to take timely and rapid action to reduce the risk of spread to our poultry industry and other populations of concern.

Captive wild birds, defined by the World Organization of Animal Health as a wild animal that is captive or otherwise lives under or requires human supervision or control, are included in the numbers reported on this page. Captive wild birds, including sick wild birds that may have died after being found and taken to a rehabilitator or sanctuary, will have the designation of “captive wild bird” in the WOAH Classification column. To remain consistent with current reporting, information will continue to be broken down to the county level. To protect privacy, private or business names will not be released. This is consistent with current reporting of wild birds as well as commercial and backyard flocks.

APHIS is continuing to process samples collected over the past year from state and partner agencies and will continue to post this information on the 2022-2023 Detections of Highly Pathogenic Avian Influenza in Wild Birds webpage. The detection date is the date of National Veterinary Services Laboratories confirmatory testing. APHIS will provide updates below when there are significant differences between sample collection and detection dates.

For submitting agencies who notice data errors or omissions, please email with supporting documentation (laboratory report/accession number/data collection) to WSLabResults@usda.gov. The two maps displayed here represent 1) a comprehensive view of all HPAI detections in wild birds since the beginning of the U.S. outbreak in January 2022, and 2) the number of HPAI detections in wild birds from the past 30 days. Both maps represent samples collected by APHIS-Wildlife Services as well as morbidity/mortality samples submitted by state agencies and private facilities. The data presented visually in these maps is also available in the table below.

Date Detected: Specimens detected by the NAHLN H5 assay were further tested by a developmental real-time RT PCR targeting the Eurasian lineage goose/Guangdong H5 clade 2.3.4.4b. “Date Detected” indicates the date when a positive detection was obtained by the developmental RRT PCR targeting the Eurasian lineage goose/Guangdong H5 clade 2.3.4.4b.

EA = Eurasian; AM = North American; the EA H5 (2.3.4.4) viruses are highly pathogenic to poultry.

Virus lineage, subtype, and pathotype per cleavage site analysis are determined from sequence data direct from the sample or virus isolate. An incomplete subtype indicates either 1) the specimen is pending virus isolation and/or sequencing results, or 2) the specimen was detected by the developmental H5 RRT PCR targeting the Eurasian lineage goose/Guangdong H5 clade 2.3.4.4b but could not be further characterized, often due to a low level of virus or viral RNA present in a given sample.

AK DFG = Alaska Department of Fish and Game CA DFW = California Department of Fish and Wildlife DOI = Department of the Interior FL FWCC = Florida Fish and Wildlife Conservation Commission GA DNR = Georgia Department of Natural Resources IA DNR = Iowa Department of Natural Resources ID Fish and Game = Idaho Fish & Game KS DWP = Kansas Department of Wildlife and Parks KY DFW = Kentucky Department of Fish and Wildlife LA DWF = Louisiana Department of Wildlife and Fisheries MA DFW = Massachusetts Department of Fish and Wildlife MD DNR = Maryland Department of Natural Resources ME DIFW = Maine Department of Inland Fisheries and Wildlife MN DNR = Minnesota Department of Natural Resources MO DOC = Missouri Department of Conservation MT FWP = Montana Fish, Wildlife, and parks NC WRC = North Carolina Wildlife Resources Commission ND Game and Fish = North Dakota Game and Fish NE Dept of Ag = Nebraska Department of Agriculture NH FGD = New Hampshire Fish and Game Department NPS = DOI National Park Service NV DOW = Nevada Division of Wildlife NWDP = USDA Wildlife Services National Wildlife Disease Program NY DEC = New York State Department of Environmental Conservation NY State Dept of Ag and Markets = New York State Department of Agriculture and Markets OH DNR = Ohio Department of Natural Resources PA Game Commission = Pennsylvania Game Commission SC DNR = South Carolina Department of Natural Resources SCWDS = Southeastern Cooperative Wildlife Disease Study SD GFP = South Dakota Game, Fish, and Parks USACE = U.S. Army Corps of Engineers USFWS = DOI U.S. Fish and Wildlife Service USGS = U.S. Geological Survey National Wildlife Health Center VA DWR = Virginia Department of Wildlife Resources WA DFW = Washington Department of Fish and Wildlife WI DNR = Wisconsin Department of Natural Resources

Avian influenza is caused by influenza Type A virus (influenza A). Avian-origin influenza viruses are broadly categorized based on a combination of two groups of proteins on the surface of the influenza A virus: hemagglutinin or “H” proteins, of which there are 16 (H1-H16), and neuraminidase or “N” proteins, of which there are 9 (N1-N9). Many different combinations of “H” and “N” proteins are possible. Each combination is considered a different subtype, and related viruses within a subtype may be referred to as a lineage. Avian influenza viruses are classified as either “low pathogenic” or “highly pathogenic” based on their genetic features and the severity of the disease they cause in poultry. Most viruses are of low pathogenicity, meaning that they causes no signs or only minor clinical signs of infection in poultry.

Agencies that submit data and find errors or omissions should email WSLabResults@usda with the necessary supporting documentation (laboratory report, accession number, data collection, etc.). gov. The two maps presented here show: 1) an extensive overview of all HPAI findings in wild birds since the start of the U S. outbreak in January 2022, and 2) the quantity of wild birds that have had HPAI infections in the last 30 days The maps display samples gathered by APHIS-Wildlife Services in addition to samples of morbidity and mortality provided by government organizations and private establishments. The table below contains the same information that is shown visually in these maps.

GA DNR = Georgia Department of Natural Resources IA DNR = Iowa Department of Natural Resources ID Fish and Game = Idaho Fish AK DFG = Alaska Department of Fish and Game CA DFW = California Department of Fish and Wildlife DOI = Department of the Interior FL FWCC = Florida Fish and Wildlife Conservation Commission S. Army Corps of Engineers USFWS = DOI U. S. Fish and Wildlife Service USGS = U. S. Geophysical Survey National Wildlife Health Center Washington Department of Fish and Wildlife (DFW) = Virginia Department of Wildlife Resources (VA DWR) = Wisconsin Department of Natural Resources (WI DNR)

Sequence data straight from the sample or virus isolate is used to determine the pathotype, subtype, and virus lineage per cleavage site analysis. An incomplete subtype denotes one of two things: either the specimen was found using the developmental H5 RRT PCR targeting the Eurasian lineage goose/Guangdong H5 clade 2, or it is awaiting virus isolation and/or sequencing results. 3. 4. 4b but were unable to be further identified, frequently as a result of a low quantity of virus or viral RNA in a particular sample.

AM stands for North America, and the EA H5 (2 3. 4. 4) viruses are highly pathogenic to poultry.

It is possible for wild birds to contract HPAI without exhibiting any symptoms. When they migrate, they can bring the illness with them, possibly exposing domestic poultry to the virus. By providing an early warning system for the introduction and spread of avian influenza viruses of concern in the US, APHIS’s wild bird surveillance program enables the poultry industry and APHIS to respond quickly and effectively to minimize the risk of the viruses spreading to other populations of concern as well as the poultry industry.

Instructions: The purple counties are those that have reported bird flu outbreaks. To zoom in, choose a state on the map that is experiencing an outbreak. Hovering over the impacted county with your mouse on a desktop computer or tapping it on a mobile device will reveal more details about the outbreak. Download Data.

FAQ

Where is bird flu most common?

Usually bird flu virus is not passed from birds to people. But since 1997, some people have become sick with this serious, deadly kind of bird flu. Most of these infections have been in Asian countries among people who have had close contact with birds raised on farms.

What is the death rate of avian flu in birds?

HPAI A(H5) or A(H7) virus infections can cause disease that affects multiple internal organs with mortality up to 90% to 100% in chickens, often within 48 hours. However, ducks can be infected without any signs of illness.

How bad is bird flu in us?

The Current Risk to the General Public is Low Right now, the H5N1 bird flu situation remains primarily an animal health issue. However, CDC is watching this situation closely and taking routine preparedness and prevention measures in case this virus changes to pose a greater human health risk.

Can backyard chickens get bird flu?

Although it is possible for domestic poultry to become infected with avian influenza from direct contact with wild birds, it is more likely that avian influenza viruses are spread indirectly to poultry on contaminated feed, clothing, and equipment.