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Highly pathogenic avian influenza,
Vietnam
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Information received on 01/10/2020 from Dr Dong Pham Van, Director General, Chief Veterinary Officer, Department of Animal Health,
Ministry of Agriculture and Rural
Development, Hanoļ, Vietnam
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Summary
| Report type |
Follow-up report No. 1 |
| Date of start of the event |
21/08/2020 |
| Date of confirmation of the event |
31/08/2020 |
| Report date |
01/10/2020 |
| Date submitted to OIE |
01/10/2020 |
| 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)
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| Outbreak 1 |
Nam Thanh, Nam Thanh, Yen Thanh, Nghe An |
| Date of start of the outbreak |
26/08/2020 |
| Outbreak status |
Resolved (26/09/2020) |
| Epidemiological unit |
Village |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
55 |
35 |
25 |
30 |
0 |
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| Outbreak 2 |
Dak Rve, Dak Rve, Kon Ray, Kon Tum |
| Date of start of the outbreak |
13/09/2020 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Village |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
1262 |
550 |
340 |
922 |
0 |
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| Outbreak 3 |
Dien Lien, Dien Lien, Dien Chau, Nghe An |
| Date of start of the outbreak |
24/09/2020 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Village |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
105 |
12 |
12 |
93 |
0 |
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| Summary of outbreaks |
Total outbreaks: 3 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
1422 |
597 |
377 |
1045 |
0 |
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| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Birds |
41.98% |
26.51% |
63.15% |
100.00% |
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| *Removed from the susceptible population through death, destruction and/or slaughter |
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Epidemiology
| Source of the outbreak(s) or origin of infection |
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| Epidemiological comments |
Vaccination was only applied for the live poultry in surrounding areas of affected flocks. |
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Control measures
| Measures applied |
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Vaccination in response to the outbreak (s)
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Surveillance outside containment and/or protection zone
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Stamping out
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No treatment of affected animals
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| Measures to be applied |
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Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. |
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Map of outbreak locations
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