8 Feb 2013

Highly pathogenic avian influenza, Bhutan (OIE World Animal Health Information System, February 8 2013, edited)

[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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