OIE: Highly pathogenic avian influenza (H5N8), Japan
submited by kickingbird at Nov, 20, 2020 11:2 AM from OIE
| Information received on 19/11/2020 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 | |
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Summary
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| Outbreak 1 |
Mitoyo-City, Kagawa |
| Date of start of the outbreak |
14/11/2020 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
10000 |
6 |
6 |
9994 |
0 | |
| Affected population |
Poultry(broiler parents) | |
| Outbreak 2 |
Mitoyo-City, Kagawa |
| Date of start of the outbreak |
14/11/2020 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
79000 |
22 |
22 |
78978 |
0 | |
| Affected population |
Poultry(laying hens) | |
| Summary of outbreaks |
Total outbreaks: 2 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Birds |
89000 |
28 |
28 |
88972 |
0 | |
| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Birds |
0.03% |
0.03% |
100.00% |
100.00% | |
| *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 |
As of the outbreak 4; On 12 November 2020, the local veterinary service in Kagawa Prefecture received a notification from a broiler parent poultry farm on an increase in the number of dead birds. The samples were sent to the laboratory of the local veterinary service (Livestock Hygiene Service Centre; LHSC) and the samples collected from dead birds were positive for influenza A virus by antigen-capture kits. On 13 November, the LHSC conducted RT-PCR and RRT-PCR tests and confirmed that the subtype was H5. On 18 November, the National Institute of Animal Health(NIAH) conducted RT-PCR and 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 and was completed on 13 November. After the destruction of all the susceptible birds in the affected farm, carcasses of destroyed birds and contaminated materials were buried and farm premises were disinfected. These control measures were completed on 17 November. Movement and shipment restrictions are imposed on the farms within a radius of 3 km and 3-10 km of the affected farm respectively. As of the outbreak 5; On 14 November 2020, the local veterinary service in Kagawa Prefecture received a notification from a domestic laying hen farm on an increase in the number of dead birds. The samples were sent to the laboratory of the local veterinary service (Livestock Hygiene Service Centre; LHSC) and the samples collected from dead birds were positive for influenza A virus by antigen-capture kits. On 15 November, the LHSC conducted RT-PCR and RRT-PCR tests and confirmed that the subtype was H5. On 18 November, the National Institute of Animal Health(NIAH) conducted RT-PCR and 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 16 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 on the outbreak 1 and 2; All carcasses of destroyed birds and contaminated materials were buried and farm premises were disinfected on 15 November and 12 November, respectively. | |
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Control measures
| Measures applied |
- Movement control inside the country
- Screening
- Quarantine
- Stamping out
- Disinfection
- Vaccination prohibited
- No treatment of affected animals
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| Measures to be applied |
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Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| Tobu Livestock Hygiene Service Centre (Local laboratory) |
Birds |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
13/11/2020 |
Positive |
| Tobu Livestock Hygiene Service Centre (Local laboratory) |
Birds |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
15/11/2020 |
Positive |
| Tobu Livestock Hygiene Service Centre (Local laboratory) |
Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
13/11/2020 |
Positive |
| Tobu Livestock Hygiene Service Centre (Local laboratory) |
Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
15/11/2020 |
Positive |
| National Institute of Animal Health (National laboratory) |
Birds |
gene sequencing |
18/11/2020 |
Positive |
| National Institute of Animal Health (National laboratory) |
Birds |
gene sequencing |
18/11/2020 |
Positive |
| National Institute of Animal Health (National laboratory) |
Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
18/11/2020 |
Positive |
| National Institute of Animal Health (National laboratory) |
Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
18/11/2020 |
Positive | |
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Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. | | [Go Top] [Close Window]
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