Highly pathogenic avian influenza,
Laos
Information received on 07/05/2014 from Dr Khambounheuang Bounkhouang , Directeur Général, Département de l'Elevage et des Pêches , Ministère de l'Agriculture et des Forêts , Vientiane capital, Laos
Summary
Report type Follow-up report No. 1 (Final report)
Date of start of the event 13/03/2014
Date of confirmation of the event 18/03/2014
Report date 07/05/2014
Date submitted to OIE 07/05/2014
Date event resolved 31/03/2014
Reason for notification Recurrence of a listed disease
Date of previous occurrence 12/2008
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N6
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (31/03/2014)
Follow-up report No. 1 (07/05/2014)
Outbreaks There are no new outbreaks in this report
Epidemiology
Source of the outbreak(s) or origin of infection
  • Introduction of new live animals
Epidemiological comments Samples from this outbreak have now been tested at the Australian Animal Health Laboratory. Sequencing analysis of original samples (post-mortem tissues) from both chickens and ducks shows that these are H5N6 highly pathogenic avian influenza viruses, with the highly pathogenic HA cleavage site sequence motif, PLRERRRKR*GLF. Phylogenetic analysis of the HA gene sequence indicates that the HA is derived from the Asian H5N1 clade 2.3.4 HA lineage; however, they clustered with ‘variant’ (reassortant) clade 2.3.4 H5 HPAI viruses from China of various NA subtypes. Follow-up sequencing of virus isolates from these samples confirms these findings. Full genome sequencing has been completed.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Disinfection / Disinfestation
  • Quarantine
  • Modified stamping out
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures
Future Reporting
The event is resolved. No more reports will be submitted.