Low pathogenic avian influenza (poultry) H5N2, Chinese Taipei (OIE, September 23 2013): 1 New Outbreak

[Giuseppe]

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


Low pathogenic avian influenza (poultry) H5N2, Chinese Taipei


Information received on 23/09/2013 from Dr Ping-Cheng Yang, Director, Animal Technology Institute Ta?wan, Council of Agriculture, Ta?wan, Chinese Taipei

• Summary
  • Report type Follow-up report No. 10
  • Date of start of the event 12/11/2012
  • Date of pre-confirmation of the event 20/11/2012
  • Report date 23/09/2013
  • Date submitted to OIE 23/09/2013
  • 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
  • Related reports
    • Immediate notification (22/11/2012)
    • Follow-up report No. 1 (21/12/2012)
    • Follow-up report No. 2 (04/01/2013)
    • Follow-up report No. 3 (18/01/2013)
    • Follow-up report No. 4 (15/03/2013)
    • Follow-up report No. 5 (18/04/2013)
    • Follow-up report No. 6 (19/04/2013)
    • Follow-up report No. 7 (03/06/2013)
    • Follow-up report No. 8 (02/08/2013)
    • Follow-up report No. 9 (30/08/2013)
    • Follow-up report No. 10 (23/09/2013)
• New outbreaks (1)
  • Outbreak 1 - Yuli Township, HUALIEN COUNTY
    • Date of start of the outbreak 09/09/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 13000 ? 20 ? 0 ? 0 ? 0
      • Affected population Duck
• Summary of outbreaks
  • Total outbreaks: 1
    • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 13000 ? 20 ? 0 ? 0 ? 0
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds - 0.15% - 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
  • During the second round of surveillance conducted on the poultry farms around the H5N2 infected duck farm in Hualien County, the H5N2 avian influenza virus was detected from swabs taken from a meat-type duck farm.
  • Movement restriction was conducted.
  • The result of clinical investigation showed that the duck were in healthy condition.
  • The national laboratory confirmed on 23 September 2013 this H5N2 outbreak as LPAI by virological test and pathogenicity test (done by lethal rate of susceptible chickens).
  • The surveillance of poultry farms around the H5N2 affected farm is in progress.
• 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 (National laboratory) ? Birds - gene sequencing - 11/09/2013 ? Negative
    • Animal Health Research Institute (National laboratory) ? Birds - haemagglutination inhibition test (HIT) -09/09/2013 ? Negative
    • Animal Health Research Institute (National laboratory) ? Birds - virus isolation - 09/09/2013 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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