Highly pathogenic avian influenza,
Information received on 16/04/2015 from Dr Tashi Samdup, Director General, Department of Livestock, Ministry of Agriculture and Forests, Thimphu, Bhutan
Report type Immediate notification
Date of start of the event 03/04/2015
Date of confirmation of the event 06/04/2015
Report date 16/04/2015
Date submitted to OIE 16/04/2015
Date event resolved 23/11/2015
Reason for notification Recurrence of a listed disease
Date of previous occurrence 17/04/2013
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N1
Nature of diagnosis Laboratory (advanced), Necropsy
This event pertains to a defined zone within the country
Related reports Immediate notification (16/04/2015)
Follow-up report No. 1 (23/11/2015)
New outbreaks (1)
Outbreak 1 Motithang City Camp, Thimphu Thromde, Thimphu
Date of start of the outbreak 03/04/2015
Outbreak status Resolved (23/11/2015)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 37 16 16 21 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 37 16 16 21 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 43.24% 43.24% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments The outbreak has occurred in a backyard, free-ranging poultry population. While interviewing the owners of the birds, none of the mentioned source of infection could be ascertained. Further investigation on the source of infection will be followed-up. A host-pathogen interaction particularly in this case would be potential research topic. Only a small number of birds in an isolated pocket was affected. No further infection in flocks in close proximity was detected.
Control measures
Measures applied
  • Zoning
  • Stamping out
  • Quarantine
  • Dipping / Spraying for control of vectors or parasites
  • Disinfection / Disinfestation
  • Screening
  • Movement control inside the country
  • 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, Thimphu (National laboratory) Birds real-time PCR 06/04/2015 Positive
National Institute of High Security Animal Diseases (NIHSAD), Bhopal, India (OIE Reference Laboratory) Birds real-time PCR 14/04/2015 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations