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niman

H5N6 Confirmed At Akita Japan Zoo

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On 15th November 2016, one death case of Cygnus atratus (black swan) was found in the zoo and its sample was tested by antigen-capture kit with positive result for influenza A virus. On 17th November 2016, another death case of Cygnus atratus was found in the same facility and positive result was gained by antigen-capture kit. On 21st November 2016, the two dead cases were confirmed to be positive for H5N6 subtype influenza A virus.

http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=21608

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Highly pathogenic avian influenza,
Japan
 
Information received on 22/11/2016 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 Immediate notification
Date of start of the event 15/11/2016
Date of confirmation of the event 21/11/2016
Report date 21/11/2016
Date submitted to OIE 22/11/2016
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 17/02/2015
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N6
Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (2)
Outbreak 1 Akita-shi, AKITA
Date of start of the outbreak 15/11/2016
Outbreak status Resolved (15/11/2016)
Epidemiological unit Zoo
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Black Swan:Cygnus atratus(Anatidae)   1 1 0 0
Outbreak 2 Akita-shi, AKITA
Date of start of the outbreak 17/11/2016
Outbreak status Resolved (17/11/2016)
Epidemiological unit Zoo
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Black Swan:Cygnus atratus(Anatidae)   1 1 0 0
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Black Swan:Cygnus atratus(Anatidae)   2 2 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Black Swan:Cygnus atratus(Anatidae) ** ** 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 On 15th November 2016, one death case of Cygnus atratus (black swan) was found in the zoo and its sample was tested by antigen-capture kit with positive result for influenza A virus. On 17th November 2016, another death case of Cygnus atratus was found in the same facility and positive result was gained by antigen-capture kit. On 21st November 2016, the two dead cases were confirmed to be positive for H5N6 subtype influenza A virus.
Control measures
Measures applied
  • Screening
  • 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
Hokkaido University (OIE Reference Laboratory) Black Swan haemagglutination inhibition test (HIT) 19/11/2016 Positive
Hokkaido University (OIE Reference Laboratory) Black Swan neuraminidase inhibition assay 20/11/2016 Positive
Hokkaido University (OIE Reference Laboratory) Black Swan reverse transcription - polymerase chain reaction (RT-PCR) 19/11/2016 Positive
Hokkaido University (OIE Reference Laboratory) Black Swan reverse transcription - polymerase chain reaction (RT-PCR) 20/11/2016 Positive
Hokkaido University (OIE Reference Laboratory) Black Swan virus isolation 19/11/2016 Positive
Hokkaido University (OIE Reference Laboratory) Black Swan virus sequencing 21/11/2016 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations
 

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