Low pathogenic avian influenza (poultry), Chinese Taipei (WAHID Interface - OIE World Animal Health Information Database, March 5 2012, edited)

[Giuseppe]

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


Low pathogenic avian influenza (poultry), Chinese Taipei


Information received on 03/03/2012 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 Follow-up report No. 1
  • Start date 25/11/2011
  • Date of first confirmation of the event 06/01/2012
  • Report date 03/03/2012
  • Date submitted to OIE 03/03/2012
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 11/02/2011
  • 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 (10/01/2012)
    • Follow-up report No. 1 (03/03/2012)
• Outbreaks
  • There are no new outbreaks in this report
• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Unknown or inconclusive
• Epidemiological comments
  • According to the laboratory results of virology on 30 January 2012 and 14 February 2012, two H5N2 AI virus strains were isolated from dead chicken and oropharyngeal swabs.
  • Based on the results of the IVPI test, one was classified as HPAI and another was identified as LPAI.
  • All of the layer chickens on the farm were destroyed on 3 March 2012.
  • Clinical and epidemiological investigations for the surrounding poultry farms were implemented.
  • No clinical suspected case or evidence of infection was detected.
• Control measures
  • Measures applied
    • Stamping out
    • 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 (National laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - gene sequencing - 09/01/2012 ? Positive
      • Birds - gene sequencing - 12/01/2012 ? Negative
      • Birds - haemagglutination inhibition test (HIT) - 06/01/2012 ? Positive
      • Birds - haemagglutination inhibition test (HIT) - 12/01/2012 ? Positive
      • Birds - intravenous pathogenicity index (IVPI) test - 30/01/2012 ? Positive
      • Birds - intravenous pathogenicity index (IVPI) test - 14/02/2012 ? Negative
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 09/01/2012 ? Positive
      • Birds - virus isolation - 10/01/2012 ? Positive
      • Birds - virus isolation - 12/01/2012 ? Positive
      • Birds - virus isolation - 13/01/2012 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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