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

[Giuseppe]

[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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