Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
Japan
Information received on 24/12/2020 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 03/12/2020
Date of confirmation of the event 09/12/2020
Report date 23/12/2020
Date submitted to OIE 24/12/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 25/03/2018
Manifestation of disease Clinical disease
Causal agent Highly pathogenic influenza A virus
Serotype H5N8
Nature of diagnosis Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (23/12/2020)
Follow-up report No. 1 (28/12/2020)
Follow-up report No. 2 (04/01/2021)
New outbreaks (4)
Outbreak 1 Wakayama-City 1, Wakayama
Date of start of the outbreak 03/12/2020
Outbreak status Resolved (03/12/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Mandarin Duck:Aix galericulata(Anatidae) 1 1 0 0
Affected population A dead Aix Galericulata was found and tested.
Outbreak 2 Yakage-Town 1, Okayama
Date of start of the outbreak 04/12/2020
Outbreak status Resolved (04/12/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Peregrin falcon:Falco peregrinus(Falconidae) 1 1 0 0
Affected population A dead Falco peregrinus was found and tested.
Outbreak 3 Mitoyo-City 1, Kagawa
Date of start of the outbreak 08/12/2020
Outbreak status Resolved (08/12/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Eastern buzzard:Buteo japonicus(Accipitridae) 1 1 0 0
Affected population A dead Buteo japonicus was found and tested.
Outbreak 4 Izumi-City 1, Kagoshima
Date of start of the outbreak 18/12/2020
Outbreak status Resolved (18/12/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Hooded crane:Grus monacha(Gruidae) 1 1 0 0
Affected population A dead Grus monacha was found and tested.
Summary of outbreaks Total outbreaks: 4
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Mandarin Duck:Aix galericulata(Anatidae) 1 1 0 0
Peregrin falcon:Falco peregrinus(Falconidae) 1 1 0 0
Eastern buzzard:Buteo japonicus(Accipitridae) 1 1 0 0
Hooded crane:Grus monacha(Gruidae) 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Mandarin Duck:Aix galericulata(Anatidae) ** ** 100.00% **
Peregrin falcon:Falco peregrinus(Falconidae) ** ** 100.00% **
Eastern buzzard:Buteo japonicus(Accipitridae) ** ** 100.00% **
Hooded crane:Grus monacha(Gruidae) ** ** 100.00% **
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Epidemiology
Source of the outbreak(s) or origin of infection
  • Contact with wild species
Epidemiological comments Cases in wild birds : Wakayama-City 1; A dead Aix galericulata(Mandarin Duck) was collected on 3 December 2020 and tested against avian influenza virus. The Tottori University conducted RT-PCR and gene sequencing tests and confirmed that the subtype of the virus was H5N8. Yakage-Town 1; A dead Falco peregrinus (Peregrine Falcon) was collected on 4 December 2020 and tested against avian influenza virus. The Tottori University conducted RT-PCR and gene sequencing tests and confirmed that the subtype of the virus was H5N8. Mitoyo-City 1; A dead Buteo japonicus (Eastern buzzard) was collected on 8 December 2020 and tested against avian influenza virus. The Tottori University conducted RT-PCR and gene sequencing tests and confirmed that the subtype of the virus was H5N8. Izumi-City 1 ; A dead Grus monacha (Hooded crane) was collected on 18 December 2020 and tested against avian influenza virus. The Kagoshima University conducted RT-PCR and gene sequencing tests and confirmed that the subtype of the virus was H5N8. Enhanced monitoring of wild birds is ongoing within a 10 kilometer radius around the sites.
Control measures
Measures applied
  • Surveillance within containment and/or protection zone
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Kagoshima University (Private Laboratory) Hooded crane gene sequencing 22/12/2020 Positive
Kagoshima University (Private Laboratory) Hooded crane reverse transcription - polymerase chain reaction (RT-PCR) 22/12/2020 Positive
Tottori University (Private Laboratory) Eastern buzzard gene sequencing 16/12/2020 Positive
Tottori University (Private Laboratory) Eastern buzzard reverse transcription - polymerase chain reaction (RT-PCR) 16/12/2020 Positive
Tottori University (Private Laboratory) Mandarin Duck gene sequencing 09/12/2020 Positive
Tottori University (Private Laboratory) Mandarin Duck reverse transcription - polymerase chain reaction (RT-PCR) 09/12/2020 Positive
Tottori University (Private Laboratory) Peregrin falcon gene sequencing 09/12/2020 Positive
Tottori University (Private Laboratory) Peregrin falcon reverse transcription - polymerase chain reaction (RT-PCR) 09/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations