OIE: Highly pathogenic avian influenza, Bhutan_follow-up report no.4

Information received on 02/03/2012 from Mr Tenzin Dhendup, Director, Ministry of Agriculture, Department of Livestock, THIMPHU, Bhutan

Summary

Report type Follow-up report No. 4
Start date 30/12/2011
Date of first confirmation of the event 08/01/2012
Report date 02/03/2012
Date submitted to OIE 02/03/2012
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 (advanced)
This event pertains to a defined zone within the country
Related reports

New outbreaks

Outbreak 1 Dala, Chukha, CHHUKHA
Date of start of the outbreak 30/12/2011
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 136 22 8 128 0
Affected Population A backyard poultry farm adjacent to the national highway
Outbreak 2 Kamji, Chukha, CHHUKHA
Date of start of the outbreak 30/12/2011
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 96 13 8 88 0
Affected Population A backyard poultry farm adjacent to the national highway
Outbreak 3 Gedu, Bongo, Chukha, CHHUKHA
Date of start of the outbreak 17/02/2012
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 231 10 5 226 0
Affected Population A backyard poultry farm adjacent to the national highway
Outbreak 4 Maybari, Chukha, CHHUKHA
Date of start of the outbreak 08/01/2012
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 290 3 3 287 0
Affected Population A backyard poultry farm adjacent to the national highway
Outbreak 5 Wangdigashel, Phuntsholing, Chukha, CHHUKHA
Date of start of the outbreak 10/02/2012
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 652 12 12 632 0
Affected Population A backyard poultry farm adjacent to the national highway
Summary of outbreaks Total outbreaks: 5
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 1405 60 36 1361 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 4.27% 2.56% 60.00% 99.43%

* Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology

Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive

Control measures

Measures applied
  • Stamping out
  • 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 National Centre for Animal Health (National laboratory)
Tests and results
Species Test Test date Result
Birds real-time PCR 15/01/2012 Positive
Birds real-time PCR 26/01/2012 Positive
Birds real-time PCR 29/01/2012 Positive
Birds real-time PCR 14/02/2012 Positive
Birds real-time PCR 18/02/2012 Positive

Future Reporting

The event is continuing. Weekly follow-up reports will be submitted.