OIE: Highly pathogenic avian influenza, Japan
Information received on 29/11/2016 from Dr Kazuo Ito, Director, International Animal Health Affairs Office, Animal Health Division, Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, Tokyo, Japan
Summary
Report type |
Immediate notification |
Date of start of the event |
28/11/2016 |
Date of confirmation of the event |
28/11/2016 |
Report date |
29/11/2016 |
Date submitted to OIE |
29/11/2016 |
Reason for notification |
Reoccurrence of a listed disease |
Date of previous occurrence |
17/02/2015 |
Manifestation of disease |
Clinical disease |
Causal agent |
Highly pathogenic avian influenza virus |
Serotype |
H5 |
Nature of diagnosis |
Clinical, Laboratory (basic) |
This event pertains to |
the whole country |
New outbreaks
Summary of outbreaks |
Total outbreaks: 2 |
Outbreak Location |
- AOMORI ( Aomori-shi )
- NIIGATA ( Sekikawa-mura )
|
Total animals affected |
Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
Birds |
332090 |
140 |
140 |
|
0 | |
Outbreak statistics |
Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
Birds |
0.04% |
0.04% |
100.00% |
** |
* Removed from the susceptible population through death, destruction and/or slaughter;
|
Epidemiology
Source of the outbreak(s) or origin of infection |
|
Epidemiological comments |
Outbreak 1 (Aomori): On 28 November 2016, the local veterinary service in Aomori Prefecture received a notification from a domestic duck farm on an increase in the number of dead birds (10 birds on the same day). The samples were sent to the laboratory of local veterinary service (Aomori Livestock Hygiene Service Centre) and the samples from dead birds were confirmed to be influenza A virus positive by antigen-capture kits. On the same day, the Centre started RT-PCR and RRT-PCR tests and confirmed that the subtype was H5.
Outbreak 2 (Niigata): On 28 November 2016, the local veterinary service in Niigata Prefecture received a notification from a domestic hen farm on an increase in the number of dead birds (60 birds on the same day). The samples were sent to the laboratory of local veterinary service (Niigata Livestock Hygiene Service Centre) and the samples from dead birds were confirmed to be influenza A virus positive by antigen-capture kits. On the same day, the Centre started RT-PCR and RRT-PCR tests and confirmed that the subtype was H5.
For both outbreaks: Stamping-out policy was applied to the affected farms. Destruction of all the susceptible birds in the affected farms is being implemented. Movement restrictions are imposed on the farms within a radius of 3km of the affected farms. Shipment restrictions are imposed on the farms within a radius of 3-10km of the affected farms. The N-type has not yet been identified. |
Control measures
Measures applied |
- Movement control inside the country
- Screening
- Disinfection / Disinfestation
- Quarantine
- Stamping out
- Vaccination prohibited
- No treatment of affected animals
|
Measures to be applied |
|
Diagnostic test results
Laboratory name and type |
Aomori Livestock Hygiene Service Centre ( Local laboratory ) |
Tests and results |
Species |
Test |
Test date |
Result |
Birds |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
28/11/2016 |
Positive |
Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
28/11/2016 |
| |