Highly pathogenic avian influenza H5N1, Bhutan (OIE, January 11 2013): 1 New Poultry Outbreak

[Giuseppe]

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


Highly pathogenic avian influenza, Bhutan


Information received on 11/01/2013 from Dr Karma Dukpa, Director General, Department of Livestock, Ministry of Agriculture and Forests, THIMPHU, Bhutan

• Summary
  • Report type Follow-up report No. 8
  • Date of start of the event 30/12/2011
  • Date of pre-confirmation of the event 08/01/2012
  • Report date 11/01/2013
  • Date submitted to OIE 11/01/2013
  • 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), Necropsy
  • 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)
• New outbreaks (1)
  • Outbreak 1 (BHT_HPAI_2012_01) Farm Goan, Lhamizingkha, Dagana, Dagana
    • Date of start of the outbreak 19/12/2012
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Village
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 970 ? 18 ? 18 ? 952 ? 0
      • Affected population:
        • From 19 to 30 December 2012, 18 poultry died in a backyard.
        • All the birds were free-ranging birds.
        • Ten birds had died in the village about a month before, but it was not reported at that time.
        • Seven samples were collected from the five houses in the vicinity which include 93 free-ranging birds and were sent to the National Centre for Animal Health (NCAH) for real-time PCR; two were positive.
• Summary of outbreaks
  • Total outbreaks: 1
  • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
    • Birds ? 970 ? 18 ? 18 ? 952 ? 0
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 1.86% - 1.86% - 100.00% - 100.00%
    • *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 31 December 2012 a total of 18 poultry died in the affected area.
  • Trace-back investigations revealed that there have been poultry deaths in the area from 19 December 2012 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 29 December when two carcasses were positive to tests.
• 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, Serbithang (National laboratory) ? Birds - real-time PCR 29/12/2012 ? Positive
    • High Security Animal Disease Laboratory, Bhopal, India (Regional Reference Laboratory) ? Birds - real-time PCR - 04/01/2013 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

-
------