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US - 1 new outbreak of highly pathogenic avian influenza H5N4 on a backyard producer premises in Teton County, Montana (WOAH, October 20, 2022)

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  • US - 1 new outbreak of highly pathogenic avian influenza H5N4 on a backyard producer premises in Teton County, Montana (WOAH, October 20, 2022)

    United States of America - High pathogenicity avian influenza viruses (poultry) (Inf. with) - Immediate notification

    GENERAL INFORMATION
    COUNTRY/TERRITORY OR ZONE
    ZONE

    ANIMAL TYPE
    TERRESTRIAL

    DISEASE CATEGORY
    OIE-listed

    EVENT ID
    4655

    DISEASE
    High pathogenicity avian influenza viruses (poultry) (Inf. with)

    CAUSAL AGENT
    Highly pathogenic avian influenza virus

    GENOTYPE / SEROTYPE / SUBTYPE
    H5N4

    START DATE
    2022/09/10

    REASON FOR NOTIFICATION
    New strain in the country

    DATE OF LAST OCCURRENCE
    -

    CONFIRMATION DATE
    2022/09/15

    EVENT STATUS
    On-going

    END DATE
    -

    SELF-DECLARATION
    NO

    REPORT INFORMATION
    REPORT NUMBER
    Immediate notification

    REPORT ID
    IN_157497

    REPORT REFERENCE
    -

    REPORT DATE
    2022/10/20

    REPORT STATUS
    Validated

    NO EVOLUTION REPORT
    -

    EPIDEMIOLOGY
    SOURCE OF EVENT OR ORIGIN OF INFECTION
    Unknown or inconclusive

    EPIDEMIOLOGICAL COMMENTS
    Highly pathogenic avian influenza (HPAI) H5N4, Eurasian lineage goose/Guangdong clade 2.3.4.4b was confirmed on a backyard producer premises in Teton County, Montana. This lineage is highly pathogenic for poultry and is a reassortant of the initial Newfoundland-like virus introduced December 2021 with North American wild bird lineage segments PB2, PB1, NP, and NA. This is the first confirmed case of HPAI H5N4 in poultry in the United States. NOTE: this outbreak was first reported on follow-up report 31 for the ongoing H5N1 Event 4309 in the United States; the N-type was characterized on 10/17/2022.
    ...
    NEW OUTBREAKS
    OB_107883 - TETON COUNTY
    OUTBREAK REFERENCE
    Teton 01

    START DATE
    2022/09/10

    END DATE
    -

    DETAILED CHARACTERISATION
    -

    FIRST ADMINISTRATIVE DIVISION
    Montana

    SECOND ADMINISTRATIVE DIVISION
    Teton

    THIRD ADMINISTRATIVE DIVISION
    -

    EPIDEMIOLOGICAL UNIT
    Backyard

    LOCATION
    Teton County

    Latitude, Longitude
    47.803 , -112.188

    (Approximate location)
    OUTBREAKS IN CLUSTER
    -

    MEASURING UNIT
    Animal

    AFFECTED POPULATION DESCRIPTION
    A backyard producer promises. Clinical signs included lethargy, depression and death. State officials have quarantined the affected promises. Depopulation was completed on 16 Sep 2022. Disposal was completed on 16 Sep 2022. Cleaning was completed on 19 Sop 2022. Disinfection was completed on 19 Sep 2022.

    SpeciesSusceptibleCasesDeathsKilled and Disposed ofSlaughtered/ Killed for commercial useVaccinated
    Birds (DOMESTIC)
    NEW 2610--2610--
    TOTAL2610--2610--


    ...
    https://wahis.woah.org/#/in-review/4655
    "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

  • #2
    World Organisation for Animal Health
    Founded as OIE


    ... SOURCE OF EVENT OR ORIGIN OF INFECTION
    • Unknown or inconclusive
    EPIDEMIOLOGICAL COMMENTS

    Highly pathogenic avian influenza (HPAI) H5N4, Eurasian lineage goose/Guangdong clade 2.3.4.4b was confirmed on a backyard producer premises in Teton County, Montana. This lineage is highly pathogenic for poultry and is a reassortant of the initial Newfoundland-like virus introduced December 2021 with North American wild bird lineage segments PB2, PB1, NP, and NA. This is the first confirmed case of HPAI H5N4 in poultry in the United States. NOTE: this outbreak was first reported on follow-up report 31 for the ongoing H5N1 Event 4309 in the United States; the N-type was characterized on 10/17/2022.

    https://wahis.woah.org/#/in-review/4655

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