Highly pathogenic avian influenza,
Vietnam
Information received on 20/12/2020 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. 2
Date of start of the event 21/08/2020
Date of confirmation of the event 31/08/2020
Report date 20/12/2020
Date submitted to OIE 20/12/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 29/07/2020
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 (11/09/2020)
Follow-up report No. 1 (01/10/2020)
Follow-up report No. 2 (20/12/2020)
Follow-up report No. 3 (14/01/2021)
New outbreaks (3)
Outbreak 1 Thuy Phong, Thuy Phong, Thai Thuy, Thai Binh
Date of start of the outbreak 26/09/2020
Outbreak status Resolved (26/10/2020)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 2198 1500 802 1396 0
Outbreak 2 Dien Dien, Dien Dien, Dien Khanh, Khanh Hoa
Date of start of the outbreak 21/11/2020
Outbreak status Resolved (21/12/2020)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 1167 100 50 1117 0
Outbreak 3 Dien Trung, Dien Trung, Dien Chau, Nghe An
Date of start of the outbreak 09/12/2020
Outbreak status Resolved (09/01/2021)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 7000 500 100 6900 0
Summary of outbreaks Total outbreaks: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 10365 2100 952 9413 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 20.26% 9.18% 45.33% 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 Vaccination was only applied for the live poultry in surrounding areas of affected flocks.
Control measures
Measures applied
  • Vaccination in response to the outbreak (s)
  • Surveillance outside containment and/or protection zone
  • Stamping out
  • No treatment of affected animals
Measures to be applied
  • No other measures
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations