Highly pathogenic avian influenza, Bhutan (OIE, April 20 2012): 1 New H5N1 Poultry Outbreak

[Giuseppe]

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


Highly pathogenic avian influenza, Bhutan


Information received on 20/04/2012 from Mr Tenzin Dhendup, Director, Ministry of Agriculture, Department of Livestock, THIMPHU, Bhutan

• Summary
  • Report type Follow-up report No. 6
  • Start date 30/12/2011
  • Date of first confirmation of the event 08/01/2012
  • Report date 20/04/2012
  • Date submitted to OIE 20/04/2012
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 25/03/2010
  • Manifestation of disease Clinical disease
  • Causal agent Highly pathogenic avian influenza virus
  • Serotype H5N1
  • Nature of diagnosis Clinical, Laboratory (advanced)
  • This event pertains to a defined zone within the country
  • Related reports
    • Immediate notification (09/01/2012)
    • Follow-up report No. 1 (17/01/2012)
    • Follow-up report No. 2 (18/01/2012)
    • Follow-up report No. 3 (01/03/2012)
    • Follow-up report No. 4 (02/03/2012)
    • Follow-up report No. 5 (09/03/2012)
    • Follow-up report No. 6 (20/04/2012)
• New outbreaks
  • Outbreak 1 - Yangbari, Gongdue, Mongar, Mongar
    • Date of start of the outbreak 27/03/2012
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Village
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 265 ? 70 ? 70 ? 0 ? 0
      • Affected Population:
        • Backyard free-ranging chicken in two villages, Yangbari and Patong
• Summary of outbreaks
  • Total outbreaks: 1
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 26.42% - 26.42% - 100.00% - 26.42%
    • * 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
  • One carcass tested positive to real-time PCR on 5 April. However, subsequently 16 samples from the affected and nearby villages tested negative to H5N1.
  • Clinical and laboratory surveillance within 3 km radius showed no new cases.
  • Therefore, at this stage, this could be a suspected H5N1 outbreak.
• Control measures
  • Measures applied
    • Quarantine
    • Movement control inside the country
    • Screening
    • Disinfection of infected premises/establishment(s)
    • Dipping / Spraying
    • Vaccination prohibited
    • No treatment of affected animals
  • Measures to be applied
    • No other measures
• Diagnostic test results
  • Laboratory name and type National Centre for Animal Health (National laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - real-time PCR - 05/04/2012 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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