Low pathogenic avian influenza (poultry), Chinese Taipei (OIE, April 10 2012): 1 New H5N2 Outbreak

[Giuseppe]

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


Low pathogenic avian influenza (poultry), Chinese Taipei


Information received on 10/04/2012 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. 4
  • Start date 25/11/2011
  • Date of first confirmation of the event 06/01/2012
  • Report date 10/04/2012
  • Date submitted to OIE 10/04/2012
  • 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 (10/01/2012)
    • Follow-up report No. 1 (03/03/2012)
    • Follow-up report No. 2 (16/03/2012)
    • Follow-up report No. 3 (03/04/2012)
    • Follow-up report No. 4 (10/04/2012)
• New outbreaks
  • Outbreak 1 - Yuan-Shan Township, I-LAN
    • Date of start of the outbreak 13/03/2012
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 1000 ? 20 ? 0 ? 0 ? 0
      • Affected Population: Duck
• Summary of outbreaks
  • Total outbreaks: 1
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 2.00% - 0.00% - 0.00% - 0.00%
    • * 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 notifiable avian influenza (NAI) viral infection was detected on a duck farm in the process of active surveillance and identified as H5N2 strain by virus isolation.
  • Movement restriction was implemented on the infected farm.
  • The ducks were normal without clinical signs.
  • The positive results of virological tests and pathogenicity test confirmed this LPAI H5N2 outbreak.
  • The clinical and epidemiological investigation of surrounding poultry farms were conducted.
  • No other case or evidence of infection was detected.
  • 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 (2011).
• 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 - gene sequencing - 26/03/2012 ? Negative
      • Birds - intravenous pathogenicity index (IVPI) test - 05/04/2012 ? Negative
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 22/03/2012 ? Positive
      • Birds - virus isolation - 02/04/2012 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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