Information received on 25/01/2021 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. 3
Date of start of the event
03/12/2020
Date of confirmation of the event
09/12/2020
Report date
22/01/2021
Date submitted to OIE
25/01/2021
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)
Follow-up report No. 3 (22/01/2021)
New outbreaks (2)

Outbreak 1
Nobeoka-City 1, Miyazaki
Date of start of the outbreak
06/01/2021
Outbreak status
Resolved (06/01/2021)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Northern Pintail:Anas acuta(Anatidae)

1
1
0
0
Affected population
Anas acuta(Northern Pintail)
Outbreak 2
Satsumasendai-City 1, Kagoshima
Date of start of the outbreak
16/01/2021
Outbreak status
Resolved (16/01/2021)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Mallard:Anas platyrhynchos(Anatidae)

1
1
0
0
Affected population
Anas platyrhynchos(Mallard)
Summary of outbreaks
Total outbreaks: 2
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Northern Pintail:Anas acuta(Anatidae)

1
1
0
0
Mallard:Anas platyrhynchos(Anatidae)

1
1
0
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Northern Pintail:Anas acuta(Anatidae)
**
**
100.00%
**
Mallard:Anas platyrhynchos(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
Follow-up report No. 3 New outbreaks in wild birds are as follows: Outbreak 1 - Nobeoka-City 2 ? A dead Anas acuta (Northern Pintail) was collected in Miyazaki prefecture on 6 January 2021 and tested against avian influenza virus. On 22 January, Tottori University conducted RT-PCR and gene sequencing tests and confirmed that the subtype of the virus was H5N8. Outbreak 2 - Satsumasendai-City 1 - A dead Anas platyrhynchos (Mallard) was collected in Kagoshima prefecture on 16 January 2021 and tested against avian influenza virus. On 20 January, 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
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
Kagoshima University (Private Laboratory)
Mallard
gene sequencing
20/01/2021
Positive
Kagoshima University (Private Laboratory)
Mallard
reverse transcription - polymerase chain reaction (RT-PCR)
20/01/2021
Positive
Tottori University (Private Laboratory)
Northern Pintail
gene sequencing
22/01/2021
Positive
Tottori University (Private Laboratory)
Northern Pintail
reverse transcription - polymerase chain reaction (RT-PCR)
22/01/2021
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.