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US - Outbreaks of HPAI H5N5 in wild great black-backed gulls in NY and MA and HPAI H5N6 in a wild bald eagle in MN (WOAH, June 13, 2023)

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  • US - Outbreaks of HPAI H5N5 in wild great black-backed gulls in NY and MA and HPAI H5N6 in a wild bald eagle in MN (WOAH, June 13, 2023)

    United States of America - Influenza A viruses of high pathogenicity (Inf. with) (non-poultry including wild birds) (2017-) - Immediate notification

    GENERAL INFORMATION
    COUNTRY/TERRITORY OR ZONE
    COUNTRY/TERRITORY

    ANIMAL TYPE
    TERRESTRIAL

    DISEASE CATEGORY
    Listed disease

    EVENT ID
    5081

    DISEASE
    Influenza A viruses of high pathogenicity (Inf. with) (non-poultry including wild birds) (2017-)

    CAUSAL AGENT
    Highly pathogenic avian influenza virus

    GENOTYPE / SEROTYPE / SUBTYPE
    H5 (N untyped)

    START DATE
    2023/02/09

    REASON FOR NOTIFICATION
    New strain in the country

    DATE OF LAST OCCURRENCE
    -

    CONFIRMATION DATE
    2023/05/22

    EVENT STATUS
    On-going

    END DATE
    -

    SELF-DECLARATION
    NO

    REPORT INFORMATION
    REPORT NUMBER
    Immediate notification

    REPORT ID
    IN_161232

    REPORT REFERENCE
    -

    REPORT DATE
    2023/06/13

    REPORT STATUS
    Validated

    NO EVOLUTION REPORT
    -

    EPIDEMIOLOGY
    SOURCE OF EVENT OR ORIGIN OF INFECTION
    Contact with wild species

    EPIDEMIOLOGICAL COMMENTS

    On May 22, 2023, the National Veterinary Services Laboratories (NVSL) confirmed HPAI H5N5 fully Eurasian lineage goose/Guangdong clade 2.3.4.4b virus in a wild great black-backed gull (Larus marinus). The bird was found dead in Suffolk County, New York, and was sampled by the NY Department of Conservation on March 30, 2023. The sample was initially tested at the New York State Veterinary Diagnostic Laboratory at Cornell University (a NAHLN laboratory), and the non-negative sample was forwarded to NVSL. NVSL identified the HPAI H5N5 from whole genome sequencing that apparently reassorted prior to reaching North American flyways. On May 26, 2023, NVSL confirmed four additional cases of HPAI H5N5 Eurasian lineage goose/Guangdong clade 2.3.4.4b virus in wild great black-backed gulls from Barnstable and Plymouth Counties, Massachusetts. Two detections were from gulls that were brought into rehab facilities at the end of January, and two detections were collected from a die-off of great black-backed gulls in the beginning of February. All four samples were initially tested at Tufts University. Tufts forwarded the non-negative samples to NVSL, and NVSL identified H5N5 from whole genome sequencing. The detections in both NY and MA are of fully Eurasian lineage and most closely related to the HPAI H5N5 virus reported in wild birds and mammals in Canada earlier this year. The movement of this virus from Europe to North America likely occurred as great black-backed gulls and other migratory birds moved from their breeding grounds in Europe to their wintering grounds along the Atlantic Coast. On June 5, 2023, NVSL confirmed EA/AM reassortant HPAI H5N6 virus in a wild bald eagle (Haliaeetus leucocephalus) from Washington County, Minnesota. The eagle was sampled by a wildlife rehabilitation center on May 8, 2023, and the sample was initially screened at the University of Minnesota Veterinary Diagnostic Lab (a NAHLN lab). The non-negative sample was forwarded to NVSL, where it was identified as HPAI H5N6 from whole genome sequencing. The virus is a reassortant of genotype B1.3 with a North American N6 gene. According to article 10.4.1.4 of the Terrestrial Animal Health Code, Member Country should not impose bans on the international trade of poultry commodities in response to notification of infection with any Influenza A viruses in birds other than poultry. For updated information about HPAI testing of wild birds in the United States, see: https://www.aphis.usda.gov/aphis/our...enza/2022-hpai.

    ...

    NEW OUTBREAKS

    OB_119896 - SUFFOLK H5N5 - SUFFOLK COUNTY...
    OB_119809 - WASHINGTON H5N6 - WASHINGTON COUNTY
    OB_119808 - BARNSTABLE H5N5 - BARNSTABLE COUNTY

    ...
    "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
    -Nelson Mandela
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