Low pathogenic avian influenza (poultry) H5N2, Chinese Taipei (OIE, August 2 2013): 1 New Outbreak

[Giuseppe]

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


Low pathogenic avian influenza (poultry) H5N2, Chinese Taipei


Information received on 02/08/2013 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. 8
  • Date of start of the event 12/11/2012
  • Date of pre-confirmation of the event 20/11/2012
  • Report date 02/08/2013
  • Date submitted to OIE 02/08/2013
  • 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)
• New outbreaks (1)
  • Outbreak 1 - Yuli Township, HUA-LIEN
    • Date of start of the outbreak 19/06/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 11672 ? 20 ? 0 ? 0 ? 0
      • Affected population duck
• Summary of outbreaks
  • Total outbreaks: 1
    • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 11672 ? 20 ? 0 ? 0 ? 0
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds - 0.17% - 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 low pathogenic viral infection was detected on a meat-type duck farm in the process of active surveillance and identified as H5N2 strain by virus isolation.
  • Movement restriction and investigation were implemented on the infected farm.
  • The ducks within the farm were normal without clinical signs.
  • Subsequently, the national laboratory confirmed this H5N2 outbreak as LPAI by virological tests and pathogenicity test on 2 August 2013.
  • The surveillance of poultry farms around the H5N2 affected farm is in progress.
  • 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
    • 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 ? Species ? Test - Test date ? Result
    • Animal Health Research Institute (National laboratory) ? Birds - gene sequencing - 05/07/2013 ? Negative
    • Animal Health Research Institute (National laboratory) ? Birds - intravenous pathogenicity index (IVPI) test - 02/08/2013 ? Negative
    • Animal Health Research Institute (National laboratory) ? Birds - virus isolation - 02/07/2013 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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