Information received on 09/02/2020 from Dr Dong Pham Van, Director General, Chief Veterinary Officer, Department of Animal Health, Ministry of Agriculture and Rural Development, Hano?, Vietnam
Summary
Report type
Follow-up report No. 1
Date of start of the event
18/01/2020
Date of confirmation of the event
21/01/2020
Report date
09/02/2020
Date submitted to OIE
09/02/2020
Reason for notification
Recurrence of a listed disease
Date of previous occurrence
15/11/2019
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 (04/02/2020)
Follow-up report No. 1 (09/02/2020)
New outbreaks (3)

Outbreak 1
Tan Khang, Tan Khang, Nong Cong, Thanh Hoa
Date of start of the outbreak
03/02/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Village
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
12294
375
375
11919
0
Outbreak 2
Quang Truong, Quang Truong, Quang Xuong, Thanh Hoa
Date of start of the outbreak
04/02/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Village
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
3280
800
800
2480
0
Outbreak 3
Quynh Hong, Quynh Hong, Quynh Luu, Nghe An
Date of start of the outbreak
07/02/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Village
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
231
105
105
126
0
Summary of outbreaks
Total outbreaks: 3
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
15805
1280
1280
14525
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
8.10%
8.10%
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

Control measures
Measures applied
Surveillance outside containment and/or protection zone
Stamping out
Disinfection
Vaccination permitted (if a vaccine exists)
No treatment of affected animals
Measures to be applied
No other measures
Diagnostic test results
Laboratory name and type
Species
Test
Test date
Result
Regional Animal Health Office 3 (Regional Laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
07/02/2020
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.