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Taiwan - 6 new outbreaks of low pathogenic avian influenza H5N2 in birds (OIE, May 13, 2019)

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  • Taiwan - 6 new outbreaks of low pathogenic avian influenza H5N2 in birds (OIE, May 13, 2019)

    Low pathogenic avian influenza (poultry),
    Chinese Taipei
    Information received on 13/05/2019 from Dr Wen-Jane Tu, Chief Veterinary Officer, Deputy Director General, Bureau of Animal and Plant Health Inspection and Quarantine, Council of Agriculture, Executive Yuan, Taipei, Chinese Taipei
    Summary
    Report type Follow-up report No. 9
    Date of start of the event 12/01/2015
    Date of confirmation of the event 14/01/2015
    Report date 13/05/2019
    Date submitted to OIE 13/05/2019
    Reason for notification Recurrence of a listed disease
    Date of previous occurrence 2014
    Manifestation of disease Clinical disease
    Causal agent Low pathogenic avian influenza virus
    Serotype H5N2
    Nature of diagnosis Clinical, Laboratory (advanced)
    This event pertains to a defined zone within the country
    Related reports Immediate notification (22/04/2015)
    Follow-up report No. 1 (12/05/2015)
    Follow-up report No. 2 (27/07/2015)
    Follow-up report No. 3 (23/11/2015)
    Follow-up report No. 4 (03/03/2016)
    Follow-up report No. 5 (01/05/2017)
    Follow-up report No. 6 (16/06/2017)
    Follow-up report No. 7 (26/07/2018)
    Follow-up report No. 8 (26/09/2018)
    Follow-up report No. 9 (13/05/2019)
    New outbreaks (6)
    Outbreak 1 (2017-yl-4) Dongshi Township, Yunlin County
    Date of start of the outbreak 14/03/2017
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 20000 0 0 20000
    Affected population Native Chickens(2017-yl-4)
    Outbreak 2 (2017-pt-3) Jiuru Township, Pingtung County
    Date of start of the outbreak 05/07/2017
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 8000 0 0 8000
    Affected population Native Chickens(2017-pt-3)
    Outbreak 3 (2018-pt-7) Linluo Township, Pingtung County
    Date of start of the outbreak 15/01/2018
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 19400 320 320 0 0
    Affected population Layer hens(2018-pt-7)
    Outbreak 4 (2018-cy-1) Dalin Township, Chiayi County
    Date of start of the outbreak 12/02/2018
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Not applicable
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 3 3 3 0 0
    Affected population Native Chickens(2018-cy-1)
    Outbreak 5 (2018-ch-1) Lukang Township, Changhua County
    Date of start of the outbreak 28/03/2018
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 6500 0 0 6500
    Affected population Native Chickens(2018-ch-1)
    Outbreak 6 (2018-yl-1) Taixi Township, Yunlin County
    Date of start of the outbreak 17/05/2018
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 25500 0 0 25500
    Affected population Native Chickens(2018-yl-1)
    Summary of outbreaks Total outbreaks: 6
    Total animals affected
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 79403 323 ** 323 0 60000
    Outbreak statistics
    Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
    Birds ** 0.41% ** 75.97%
    *Removed from the susceptible population through death, destruction and/or slaughter
    **Not calculated because of missing information
    Epidemiology
    Source of the outbreak(s) or origin of infection
    • Unknown or inconclusive
    Epidemiological comments Samples from Chuaghua County, Yunlin County, Chiayi County and Pingtung County were sent to the National Laboratory, Animal Health Research Institute (AHRI) for diagnosis. H5N2 subtype avian influenza was confirmed by AHRI. The infected farms were placed under movement restrictions. The pathogenicity of the virus was subsequently confirmed by the AHRI as low pathogenic (less than 75% mortality of the tested chickens) on 29 April 2019. Surrounding poultry farms within 3 km radius of the infected farms were placed under intensified surveillance for three months.
    Control measures
    Measures applied
    • Movement control inside the country
    • Screening
    • Quarantine
    • Zoning
    • Vaccination prohibited
    • No treatment of affected animals
    Measures to be applied
    • No other measures
    Diagnostic test results
    Laboratory name and type Species Test Test date Result
    Animal Health Research Institute (AHRI) (National laboratory) Birds inoculation test 29/04/2019 Negative
    Future Reporting
    The event is continuing. Weekly follow-up reports will be submitted.
    ...
    http://www.oie.int/wahis_2/public/wa...reportid=30422
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