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)
Follow-up report No. 9 (08/02/2013)
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.
Map of outbreak locations