Information received on 28/12/2020 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
Follow-up report No. 1
Date of start of the event
03/12/2020
Date of confirmation of the event
09/12/2020
Report date
28/12/2020
Date submitted to OIE
28/12/2020
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)
New outbreaks (2)

Outbreak 1
Oyodo-Town 1, Nara
Date of start of the outbreak
20/12/2020
Outbreak status
Resolved (20/12/2020)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Northern Goshawk:Accipiter gentilis(Accipitridae)

1
1
0
0
Affected population
A dead Accipiter gentilis was found and tested.
Outbreak 2
Izumi-City 2, Kagoshima
Date of start of the outbreak
22/12/2020
Outbreak status
Resolved (22/12/2020)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Mandarin Duck:Aix galericulata(Anatidae)

1
0
1
0
Affected population
A weaken Aix galericulata was found and tested.
Summary of outbreaks
Total outbreaks: 2
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Northern Goshawk:Accipiter gentilis(Accipitridae)

1
1
0
0
Mandarin Duck:Aix galericulata(Anatidae)

1
0
1
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Northern Goshawk:Accipiter gentilis(Accipitridae)
**
**
100.00%
**
Mandarin Duck:Aix galericulata(Anatidae)
**
**
0.00%
**
*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
New outbreaks in wild birds are as follows: Outbreak 1 - Oyodo-Town 1 - A dead Accipiter gentilis (Northern goshawk) was collected on 20 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. Outbreak 2 - Izumi-City 2 - A weaken Aix galericulata (Mandarin duck) was collected on 22 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.

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
Kagoshima University (Private Laboratory)
Mandarin Duck
gene sequencing
25/12/2020
Positive
Kagoshima University (Private Laboratory)
Mandarin Duck
reverse transcription - polymerase chain reaction (RT-PCR)
25/12/2020
Positive
Tottori University (Private Laboratory)
Northern Goshawk
gene sequencing
25/12/2020
Positive
Tottori University (Private Laboratory)
Northern Goshawk
reverse transcription - polymerase chain reaction (RT-PCR)
25/12/2020
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.