Low pathogenic avian influenza (poultry), Chinese Taipei, H5N2 (OIE, April 22 2011)

[Giuseppe]

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

Low pathogenic avian influenza (poultry), Chinese Taipei


Information received on 22/04/2011 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 02/03/2011
  • Date of first confirmation of the event 21/03/2011
  • Report date 22/04/2011
  • Date submitted to OIE 22/04/2011
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 11/02/2011
  • 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
  • Related reports
    • Immediate notification (21/03/2011)
    • Follow-up report No. 1 (22/04/2011)
• Outbreaks
  • There are no new outbreaks in this report
• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Unknown or inconclusive
• Epidemiological comments
  • The results of clinical findings and following pathogenicity assays from the index farm confirmed the virulence of the virus being low pathogenic.
  • First round of clinical health investigations and intensified surveillance of the surrounding poultry farms were done, and one H7N3 case was identified on 7 April 2011 and subsequently reported to OIE on 11 April 2011.
  • As to this index farm, the follow-up sampling and testing were accomplished, and the results of serological and virological (RT-PCR test and virus isolation) tests obtained on 14 April 2011 were all negative.
  • 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 (2010).
• 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 (National laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - haemagglutination inhibition test (HIT) - 14/04/2011 ? Negative
      • Birds - intravenous pathogenicity index (IVPI) test - 06/04/2011 ? Negative
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 14/04/2011 ? Negative
      • Birds - virus isolation - 14/04/2011 ? Negative
      • Birds - virus sequencing - 24/03/2011 ? Negative
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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