Low pathogenic avian influenza (poultry) H5N2, Chinese Taipei (OIE, January 7 2013): 1 New Outbreak

[Giuseppe]

[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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