OIE: Highly pathogenic avian influenza (H5N8), Japan
submited by kickingbird at Nov, 10, 2020 20:6 PM from OIE
| Information received on 10/11/2020 from Dr Norio Kumagai, Director, Chief Veterinary Officer, Animal Health Division, Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, Tokyo, Japan | |
|
Summary
| Report type |
Follow-up report No. 1 |
| Date of start of the event |
04/11/2020 |
| Date of confirmation of the event |
04/11/2020 |
| Report date |
09/11/2020 |
| Date submitted to OIE |
10/11/2020 |
| Reason for notification |
Recurrence of a listed disease |
| Date of previous occurrence |
14/01/2018 |
| Manifestation of disease |
Clinical disease |
| Causal agent |
Highly pathogenic avian influenza virus |
| Serotype |
H5N8 |
| Nature of diagnosis |
Clinical, Laboratory (basic), Laboratory (advanced) |
| This event pertains to |
a defined zone within the country |
| Related reports |
Immediate notification (06/11/2020)
Follow-up report No. 1 (09/11/2020)
| |
|
|
| Outbreak 1 |
Higashikagawa-City, Kagawa |
| Date of start of the outbreak |
07/11/2020 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
48000 |
24 |
24 |
47976 |
0 | |
| Affected population |
Poultry(laying hens) | |
| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
48000 |
24 |
24 |
47976 |
0 | |
| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Birds |
0.05% |
0.05% |
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 |
|
| Epidemiological comments |
On 7 November 2020, the local veterinary service in Kagawa Prefecture received a notification from a domestic laying hens farm on an increase in the number of dead birds. The samples collected from dead birds were sent to the laboratory of the local veterinary service (Tobu Livestock Hygiene Service Centre; LHSC) and were positive for influenza A virus by antigen-capture kits. On 8 November, the National Institute of Animal Health (NIAH) conducted RT-PCR and RRT-PCR tests and confirmed that the subtype was H5. On 9 November, NIAH conducted the sequencing test and confirmed that the subtype of the virus was H5N8 and causative virus was determined as high pathogenicity avian influenza. Stamping-out policy applied to the affected farm. On 9 November, stamping out was completed. Movement and shipment restrictions are imposed on the farms within a radius of 3 km and 3-10 km of the affected farm respectively. Follow-up information and modification on the outbreak in Mitoyo-City reported in the report No. 36435: Stamping out was completed on 8 November. Affected population is not broilers but laying hens. | |
|
|
Control measures
| Measures applied |
- Movement control inside the country
- Screening
- Quarantine
- Stamping out
- Disinfection
- Vaccination prohibited
- No treatment of affected animals
|
| Measures to be applied |
| |
|
Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| National Institute of Animal Health (National laboratory) |
Birds |
gene sequencing |
09/11/2020 |
Positive |
| National Institute of Animal Health (National laboratory) |
Birds |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
08/11/2020 |
Positive |
| National Institute of Animal Health (National laboratory) |
Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
08/11/2020 |
Positive | |
|
Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. | |
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