Highly pathogenic avian influenza,
Vietnam
Information received on 22/08/2014 from Dr Dong Pham Van, Director General, Chief Veterinary Officer, Department of Animal Health, Ministry of Agriculture and Rural Development, Hanoļ, Vietnam
Summary
Report type Follow-up report No. 1
Date of start of the event 22/04/2014
Date of pre-confirmation of the event 16/07/2014
Report date 22/08/2014
Date submitted to OIE 22/08/2014
Date event resolved 06/10/2014
Reason for notification New strain of a listed disease
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N6
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (12/08/2014)
Follow-up report No. 1 (22/08/2014)
Follow-up report No. 2 (04/09/2014)
Follow-up report No. 3 (20/09/2014)
Follow-up report No. 4 (22/10/2014)
New outbreaks (1)
Outbreak 1 Pho Lu, Pho Lu, Bao Thang, LAO CAI
Date of start of the outbreak 11/08/2014
Outbreak status Resolved (01/09/2014)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 558 498 498 60 0
Affected population Affected species: pheasant
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 558 498 498 60 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 89.25% 89.25% 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
Epidemiological comments All poultry in affected flocks were destroyed immediately when poultry showing clinical signs of Highly Pathogenic Avian Influenza were detected. Samples were taken from surrounding poultry flocks. All were negative for avian influenza.
Control measures
Measures applied
  • Control of wildlife reservoirs
  • Movement control inside the country
  • Screening
  • Disinfection of infected premises/establishment(s)
  • Modified stamping out
  • No vaccination
  • 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 Veterinary Diagnosis (NCVD) (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 21/08/2014 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations