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Highly pathogenic avian influenza H5N1, Bhutan (OIE, February 8 2013): 1 New Poultry Outbreak

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  • Highly pathogenic avian influenza H5N1, Bhutan (OIE, February 8 2013): 1 New Poultry Outbreak

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


    Highly pathogenic avian influenza, Bhutan


    Information received on 08/02/2013 from Dr Karma Dukpa, Director General, Department of Livestock, Ministry of Agriculture and Forests, THIMPHU, Bhutan
    • Summary
      • Report type Follow-up report No. 9
      • Date of start of the event 30/12/2011
      • Date of pre-confirmation of the event 08/01/2012
      • Report date 08/02/2013
      • Date submitted to OIE 08/02/2013
      • 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 (basic), 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)
        • Follow-up report No. 7 (25/10/2012)
        • Follow-up report No. 8 (11/01/2013)
        • Follow-up report No. 9 (08/02/2013)
    • New outbreaks (1)
      • Outbreak 1 (BHT_HPAI_2012_01) - Namkhaling, Pelrithang & Chuzargang, Gelephu, Chuzagang, Sarpang, Sarpang
        • Date of start of the outbreak 14/01/2013
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
          • Birds - 85956 – 76 – 76 – 832 – 0
          • Affected population Backyard free ranging local chicken in Chuzargang and Namkhaling villages. Backyard and improved chicken in Pelrithang village.
    • Summary of outbreaks
      • Total outbreaks: 1
        • Total animals affected: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
          • Birds – 85956 – 76 – 76 – 832 – 0
        • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
          • Birds - 0.09% - 0.09% - 100.00% - 1.06%
          • *Removed from the susceptible population through death, destruction and/or slaughter
    • Epidemiology
      • Source of the outbreak(s) or origin of infection
        • Unknown or inconclusive
        • Illegal movement of animals
    • Epidemiological comments
      • Up to 18 January 2013 a total of 76 poultry died in the affected area.
      • Trace-back investigations revealed that there have been poultry deaths in the area from 14 January 2013 although they were not reported immediately to the local veterinary authorities.
      • The disease was confirmed through real-time PCR at the National Veterinary Laboratory on 16 January 2013 when four carcasses were positive to tests.
      • Subsequently, the disease was confirmed by HSADL (Bhopal, India) on 31 January 2013.
    • Control measures
      • Measures applied
        • Stamping out
        • 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 – Species – Test - Test date – Result
        • National Centre for Animal Health (National laboratory) – Birds - real-time PCR - 16/01/2013 – Positive
        • National Centre for Animal Health (National laboratory) – Birds - real-time PCR - 17/01/2013 – Positive
        • High Security Animal Disease Laboratory, Bhopal, India (OIE’s Reference Laboratory) – Birds - real-time PCR - 31/01/2013 – Positive
        • High Security Animal Disease Laboratory, Bhopal, India (OIE’s Reference Laboratory) – Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 31/01/2013 – Positive
    • Future Reporting
      • The event is continuing. Weekly follow-up reports will be submitted.
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