OIE: Highly pathogenic avian influenza, Laos

Information received on 26/02/2009 from Dr Khambounheuang Bounkhouang , Directeur Général, Département de l´Elevage et des Pêches , Ministère de l´Agriculture et des Forêts , Vientiane, Laos

Summary

Report type Immediate notification
Start date 30/01/2009
Date of first confirmation of the event 09/02/2009
Report date 26/02/2009
Date submitted to OIE 26/02/2009
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 29/12/2008
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 the whole country

New outbreaks

Summary of outbreaks Total outbreaks: 1
Outbreak Location and Affected population
  • PHONGSALY (Ban Meuang Khoua, Khoua) : Free-range village poultry. Poultry started to get sick and died since the end of January 2009 with a high mortality rate.
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 3314 730 730 2584
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 22.03% 22.03% 100.00% **

* Removed from the susceptible population through death, destruction and/or slaughter
** Not calculated because of missing information

Epidemiology

Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
  • Illegal movement of animals
Epidemiological comments The first onset of the cases occurred during Lunar new year celebration and as a result the outbreak might be associated with the movement of poultry and poultry products for the celebration.

Control measures

Measures applied
  • Stamping out
  • Quarantine
  • Movement control inside the country
  • 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 Animal Health Centre (National laboratory)
Tests and results
Species Test Test date Result
Birds rapid tests 08/02/2009 Positive
Birds real-time PCR 09/02/2009 Positive

Future Reporting

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