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Taiwan - 3 new outbreaks of low pathogenic avian influenza H5N2 in 3 poultry farms in Taoyuan City, Hsinchu County and Chiayi County (OIE, July 27, 2015)

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  • Taiwan - 3 new outbreaks of low pathogenic avian influenza H5N2 in 3 poultry farms in Taoyuan City, Hsinchu County and Chiayi County (OIE, July 27, 2015)

    Low pathogenic avian influenza (poultry),
    Chinese Taipei
    Information received on 27/07/2015 from Dr Ping-Cheng Yang, Vice President, Agriculture Technology Research Institute, Council of Agriculture, Hsinchu City, Chinese Taipei
    Summary
    Report type Follow-up report No. 2
    Date of start of the event 12/01/2015
    Date of confirmation of the event 14/01/2015
    Report date 27/07/2015
    Date submitted to OIE 27/07/2015
    Reason for notification Reoccurrence 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)
    New outbreaks (3)
    Outbreak 1 (cy-45) Minxiong Township, CHIAYI COUNTY
    Date of start of the outbreak 22/01/2015
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Destroyed Slaughtered
    Birds 23800 5211 18589 0
    Affected population Native chickens (cy-45)
    Outbreak 2 (hc-3) Xinfeng Township, HSINCHU COUNTY
    Date of start of the outbreak 28/01/2015
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Destroyed Slaughtered
    Birds 72400 17862 54538 0
    Affected population Chickens (hc-3)
    Outbreak 3 (ty-5) Guanyin District, TAOYUAN COUNTY
    Date of start of the outbreak 28/01/2015
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Destroyed Slaughtered
    Birds 45000 2500 42500 0
    Affected population Chickens (ty-5)
    Summary of outbreaks Total outbreaks: 3
    Total animals affected
    Species Susceptible Cases Deaths Destroyed Slaughtered
    Birds 141200 ** 25573 115627 0
    Outbreak statistics
    Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
    Birds ** 18.11% ** 100.00%
    *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 Abnormal mortalities were observed in 3 poultry farms in Taoyuan City, Hsinchu County and Chiayi County. Samples were sent to the National Laboratory, the Animal Health Research Institute (AHRI) for diagnosis. H5N2 subtype low pathogenic avian influenza (LPAI) was confirmed by AHRI. These farms have been put under movement restrictions. The pathogenicity of the virus has been subsequently confirmed by national laboratory as low pathogenic (less than 75% mortality of the tested chickens) on 20 July 2015. All animals on the infected farms have been culled on 31 January and 2nd February 2015. Thorough cleaning and disinfection have been conducted after stamping out operation. Surrounding poultry farms within 3 km radius of infected farms are under intensified surveillance for 3 months.
    Control measures
    Measures applied
    • Stamping out
    • Quarantine
    • Movement control inside the country
    • Screening
    • Zoning
    • Disinfection / Disinfestation
    • 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 gene sequencing 24/01/2015 Positive
    Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 31/01/2015 Positive
    Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 23/01/2015 Positive
    Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 30/01/2015 Positive
    Future Reporting
    The event is continuing. Weekly follow-up reports will be submitted.
    .../
    "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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