Information received on 04/02/2021 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. 4
Date of start of the event
03/12/2020
Date of confirmation of the event
09/12/2020
Report date
03/02/2021
Date submitted to OIE
04/02/2021
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)
Follow-up report No. 4 (03/02/2021)
New outbreaks (4)
Outbreak 1
Obihiro-City 1, Hokkaido
Date of start of the outbreak
18/01/2021
Outbreak status
Resolved (18/01/2021)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Peregrin falcon:Falco peregrinus(Falconidae)
1
1
0
0
Affected population
A dead Falco peregrinus was found and tested.
Outbreak 2
Izumi-City 2, Kagoshima
Date of start of the outbreak
19/01/2021
Outbreak status
Resolved (19/01/2021)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Hooded crane:Grus monacha(Gruidae)
1
1
0
0
Affected population
A dead Hooded crane was found and tested.
Outbreak 3
Takaharu-Town 1, Miyazaki
Date of start of the outbreak
24/01/2021
Outbreak status
Resolved (24/01/2021)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Mallard:Anas platyrhynchos(Anatidae)
2
2
0
0
Affected population
22 dead Mallards were found and 17 of them were tested.
Outbreak 4
Asahikawa-City 1, Hokkaido
Date of start of the outbreak
27/01/2021
Outbreak status
Resolved (27/01/2021)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
White-tailed Eagle:Haliaeetus albicilla(Accipitridae)
1
1
0
0
Affected population
A weakened White-tailed eagle was found and tested.
Summary of outbreaks
Total outbreaks: 4
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Peregrin falcon:Falco peregrinus(Falconidae)
1
1
0
0
Hooded crane:Grus monacha(Gruidae)
1
1
0
0
Mallard:Anas platyrhynchos(Anatidae)
2
2
0
0
White-tailed Eagle:Haliaeetus albicilla(Accipitridae)
1
1
0
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Peregrin falcon:Falco peregrinus(Falconidae)
**
**
100.00%
**
Hooded crane:Grus monacha(Gruidae)
**
**
100.00%
**
Mallard:Anas platyrhynchos(Anatidae)
**
**
100.00%
**
White-tailed Eagle:Haliaeetus albicilla(Accipitridae)
**
**
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. 4 New outbreaks in wild birds are as follows: Outbreak 1 - Izumi-City 3: A dead Grus monacha (Hooded crane) was collected in Kagoshima prefecture on 19 January 2021 and tested against avian influenza virus. On 25 January, Kagoshima University conducted RT-PCR and gene sequencing tests and confirmed that the subtype of the virus was H5N8. Outbreak 2 - Obihiro-City 1: A dead Falco peregrinus (Peregrine Falcon) was collected in Hokkaido prefecture on 18 January 2021 and tested against avian influenza virus. On 28 January, Hokkaido University conducted RT-PCR and gene sequencing tests and confirmed that the subtype of the virus was H5N8. Outbreak 3 - Takaharu-Town 1: 22 dead Anas platyrhynchos (Mallard) were collected in Miyazaki prefecture on 24 January 2021 and 17 of them tested against avian influenza virus. On 29 January, Tottori University conducted RT-PCR and gene sequencing tests and 2 of them were confirmed that the subtype of the virus was H5N8. Outbreak 4 - Asahikawa-City 1: A weakened Haliaeetus albicilla (White-tailed eagle) was collected in Hokkaido prefecture on 27 January 2021 and tested against avian influenza virus. On 3 Feburary, Hokkaido 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
Hokkaido University (Private Laboratory)
Peregrin falcon
gene sequencing
28/01/2021
Positive
Hokkaido University (Private Laboratory)
Peregrin falcon
reverse transcription - polymerase chain reaction (RT-PCR)
28/01/2021
Positive
Hokkaido University (Private Laboratory)
White-tailed Eagle
gene sequencing
03/02/2021
Positive
Hokkaido University (Private Laboratory)
White-tailed Eagle
reverse transcription - polymerase chain reaction (RT-PCR)
03/02/2021
Positive
Kagoshima University (Private Laboratory)
Hooded crane
gene sequencing
25/01/2021
Positive
Kagoshima University (Private Laboratory)
Hooded crane
reverse transcription - polymerase chain reaction (RT-PCR)
25/01/2021
Positive
Tottori University (Private Laboratory)
Mallard
gene sequencing
29/01/2021
Positive
Tottori University (Private Laboratory)
Mallard
reverse transcription - polymerase chain reaction (RT-PCR)
29/01/2021
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.