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

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

    [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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