Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds),
Japan
Information received on 09/03/2018 from Dr Kazuo Ito, Director, International Animal Health Affairs Office, Animal Health Division, Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, Tokyo, Japan
Summary
Report type Follow-up report No. 4
Date of start of the event 05/11/2017
Date of confirmation of the event 09/11/2017
Report date 09/03/2018
Date submitted to OIE 09/03/2018
Date event resolved 25/03/2018
Reason for notification Recurrence of a listed disease
Date of previous occurrence 08/03/2017
Manifestation of disease Clinical disease
Causal agent Highly pathogenic influenza A virus
Serotype H5N6
Nature of diagnosis Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (10/11/2017)
Follow-up report No. 1 (13/11/2017)
Follow-up report No. 2 (24/11/2017)
Follow-up report No. 3 (22/01/2018)
Follow-up report No. 4 (09/03/2018)
Follow-up report No. 5 (23/03/2018)
Follow-up report No. 6 (27/04/2018)
Follow-up report No. 7 (31/05/2018)
New outbreaks (3)
Outbreak 1 Itami city, Hyogo
Date of start of the outbreak 01/03/2018
Outbreak status Resolved (01/03/2018)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Large-billed Crow:Corvus macrorhynchos(Corvidae) 5 5 0 0
Outbreak 2 Itami city, Hyogo
Date of start of the outbreak 02/03/2018
Outbreak status Resolved (02/03/2018)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Large-billed Crow:Corvus macrorhynchos(Corvidae) 6 6 0 0
Outbreak 3 Itami city, Hyogo
Date of start of the outbreak 03/03/2018
Outbreak status Resolved (03/03/2018)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Large-billed Crow:Corvus macrorhynchos(Corvidae) 2 2 0 0
Summary of outbreaks Total outbreaks: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Large-billed Crow:Corvus macrorhynchos(Corvidae) 13 13 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Large-billed Crow:Corvus macrorhynchos(Corvidae) ** ** 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 Large-billed crows (Corvus macrorhynchos) were found dead or weak in Itami city and tested positive for influenza A virus with rapid tests. Then confirmatory tests were carried out in Tottori University and H5N6 highly pathogenic avian influenza virus was detected in the 12 samples. The area within 10 km around the birds' collection point was designated as wild bird monitoring priority area.
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
Tottori University (Private Laboratory) Large-billed Crow gene sequencing 06/03/2018 Positive
Tottori University (Private Laboratory) Large-billed Crow gene sequencing 08/03/2018 Positive
Tottori University (Private Laboratory) Large-billed Crow haemagglutination (HA) test 06/03/2018 Positive
Tottori University (Private Laboratory) Large-billed Crow haemagglutination (HA) test 08/03/2018 Positive
Tottori University (Private Laboratory) Large-billed Crow haemagglutination inhibition test (HIT) 06/03/2018 Positive
Tottori University (Private Laboratory) Large-billed Crow haemagglutination inhibition test (HIT) 08/03/2018 Positive
Tottori University (Private Laboratory) Large-billed Crow reverse transcription - polymerase chain reaction (RT-PCR) 06/03/2018 Positive
Tottori University (Private Laboratory) Large-billed Crow reverse transcription - polymerase chain reaction (RT-PCR) 08/03/2018 Positive
Tottori University (Private Laboratory) Large-billed Crow virus isolation 06/03/2018 Positive
Tottori University (Private Laboratory) Large-billed Crow virus isolation 08/03/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations