Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
Japan
Information received on 04/01/2021 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. 2
Date of start of the event 03/12/2020
Date of confirmation of the event 09/12/2020
Report date 04/01/2021
Date submitted to OIE 04/01/2021
Reason for notification First occurrence of a listed disease
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 (1)
Outbreak 1 Tokigawa-Town 1, Saitama
Date of start of the outbreak 23/12/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Ural Owl:Strix uralensis(Strigidae) 1 1 0 0
Affected population Strix uralensis(Ural Owl)
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Ural Owl:Strix uralensis(Strigidae) 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Ural Owl:Strix uralensis(Strigidae) ** ** 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
  • Unknown or inconclusive
Epidemiological comments Follow-up report No. 2 New outbreaks in wild birds are as follows: Outbreak 1 - Tokigawa-Town 1 A dead Strix uralensis (Ural owl) was collected on 23 December 2020 and tested against avian influenza virus. On 30 December, National Institute of Animal Health conducted RT-PCR and gene sequencing tests and confirmed that the subtype of the virus was H5N8.
Control measures
Measures applied
  • Screening
  • Disinfection
  • 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
National Institute of Animal Health (National laboratory) Ural Owl gene sequencing 30/12/2020 Positive
National Institute of Animal Health (National laboratory) Ural Owl reverse transcription - polymerase chain reaction (RT-PCR) 30/12/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations