Low pathogenic avian influenza H5N2 (poultry), Chinese Taipei (OIE, November 23 2012): 1 New Outbreak

[Giuseppe]

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


Low pathogenic avian influenza (poultry), Chinese Taipei


Information received on 22/11/2012 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 Immediate notification
  • Date of start of the event 12/11/2012
  • Date of pre-confirmation of the event 20/11/2012
  • Report date 22/11/2012
  • Date submitted to OIE 23/11/2012
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 13/07/2012
  • Manifestation of disease Sub-clinical infection
  • Causal agent Low pathogenic avian influenza virus
  • Serotype H5N2
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to a defined zone within the country
• New outbreaks
  • Summary of outbreaks
    • Total outbreaks: 1
      • Outbreak Location - CHIA-I ( Pu-Zih )
        • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • Birds - 15700 - ** - 0 - 0 - 0
        • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
          • Birds - ** - 0.00% - ** - 0.00%
          • * 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
  • The notifiable avian influenza (NAI) viral infection was detected on a layer chicken farm during active surveillance and identified as H5N2 strain by virus isolation.
  • Movement restriction was implemented on the infected farm.
  • Clinical and epidemiological investigation in the infected farm was done and the result showed that the layers were in healthy condition without drop of egg production.
  • The positive results of serological, virological tests and analyzed data of gene sequencing confirmed this H5N2 outbreak as LPAI.
  • The clinical and epidemiological investigations of surrounding poultry farms were conducted.
  • Note by the OIE Animal Health Information Department:
    • H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2012).
• 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: Animal Health Research Institute (AHRI) ( National laboratory )
    • Tests and results: Species - Test - Test date - Result
      • Birds - gene sequencing - 22/11/2012 - Negative
      • Birds - haemagglutination inhibition test (HIT) - 20/11/2012 - Positive
      • Birds - virus isolation - 20/11/2012 - Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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