OIE: Highly pathogenic avian influenza (H5N8), Japan
submited by kickingbird at Nov, 7, 2020 8:53 AM from OIE
| Information received on 06/11/2020 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 |
Immediate notification |
| Date of start of the event |
04/11/2020 |
| Date of confirmation of the event |
04/11/2020 |
| Report date |
06/11/2020 |
| Date submitted to OIE |
06/11/2020 |
| 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 | |
|
|
| Outbreak 1 |
Mitoyo-City, Kagawa |
| Date of start of the outbreak |
04/11/2020 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
330000 |
2000 |
2000 |
328000 |
0 | |
| Affected population |
Poultry (broilers) | |
| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
330000 |
2000 |
2000 |
328000 |
0 | |
| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Birds |
0.61% |
0.61% |
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 4 November 2020, the local veterinary service in Kagawa Prefecture received a notification from a domestic broilers farm on an increase in the number of dead birds. The samples were sent to the laboratory of the local veterinary service (Seibu Livestock Hygiene Service Centre; LHSC) and the samples collected from dead birds were positive for influenza A virus by antigen-capture kits. On 5 November, The LHSC conducted RT-PCR and RRT-PCR tests and confirmed that the subtype was H5. On 6 November, the National Institute of Animal Health (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. Destruction of all the susceptible birds in the affected farm is being implemented. Movement and shipment restrictions are imposed on the farms within a radius of 3 km and 3-10 km of the affected farm respectively. | |
|
|
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 |
| Seibu Livestock Hygiene Service Centre (Local laboratory) |
Birds |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
05/11/2020 |
Positive |
| Seibu Livestock Hygiene Service Centre (Local laboratory) |
Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
05/11/2020 |
Positive |
| National Institute of Animal Health (National laboratory) |
Birds |
gene sequencing |
06/11/2020 |
Positive | |
|
Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. | |
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