7 Jan 2013

Low pathogenic avian influenza (poultry), Chinese Taipei (OIE World Animal Health Information System, January 7 2013, edited)

[Source: OIE, full page: (LINK). Edited.]

Low pathogenic avian influenza (poultry), Chinese Taipei

Information received on 04/01/2013 from Dr Kwo-Ching Huang, Chief Veterinary Officer and 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. 2
    • Date of start of the event 12/11/2012
    • Date of pre-confirmation of the event 20/11/2012
    • Report date 04/01/2013
    • Date submitted to OIE 04/01/2013
    • Reason for notification Reoccurrence of a listed disease
    • Date of previous occurrence 13/07/2012
    • Manifestation of disease Clinical disease
    • Causal agent Low pathogenic avian influenza virus
    • Serotype H5N2
    • Nature of diagnosis Laboratory (advanced)
    • This event pertains to a defined zone within the country
    • Related reports
      • Immediate notification (22/11/2012)
      • Follow-up report No. 1 (21/12/2012)
      • Follow-up report No. 2 (04/01/2013)
  • New outbreaks (1) 
    • Outbreak 1  - Ma-Gong, P'ENG-HU
      • Date of start of the outbreak 20/12/2012
      • Outbreak status Continuing (or date resolved not provided)
      • Epidemiological unit Farm
      • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
        • Birds  - 69 – 25 – 25 – 31 – 13
        • Affected population Native chicken
  • Summary of outbreaks
    • Total outbreaks: 1
    • Total animals affected: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds – 69 – 25 – 25 – 31 – 13
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds - 36.23% - 36.23% - 100.00% - 100.00%
      • *Removed from the susceptible population through death, destruction and/or slaughter
  • Epidemiology
    • Source of the outbreak(s) or origin of infection
      • Unknown or inconclusive
  • Epidemiological comments
    • The H5N2 virus was isolated on a native chicken farm during intensified surveillance programme conducted on poultry farms surrounding the first H5N2 affected farm in Peng-Hu county in 2012.
    • Movement restriction was implemented on the affected farm and the chickens were inspected and found normal.
    • The Animal Health Research Institute (AHRI) subsequently confirmed this outbreak was caused by H5N2 LPAI virus according to the result of pathogenicity test.
    • The local government decided to cull the chickens on the farm as the measure for precaution on 3 January 2013 and the task was completed at the same day.
    • Cleaning and disinfection of the farm were carried out.
  • Control measures
    • Measures applied
      • Quarantine
      • Movement control inside the country
      • Screening
      • Zoning
      • Disinfection of infected premises/establishment(s)
      • 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 - 26/12/2012 – Negative
      • Animal Health Research Institute (AHRI) (National laboratory) – Birds - intravenous pathogenicity index (IVPI) test  - 20/12/2012 – Negative
      • Animal Health Research Institute (AHRI) (National laboratory) – Birds - intravenous pathogenicity index (IVPI) test  - 04/01/2013 – Negative
      • Animal Health Research Institute (AHRI) (National laboratory) – Birds - virus isolation - 24/12/2012 – Positive
  • Future Reporting
    • The event is continuing. Weekly follow-up reports will be submitted.

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