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. 7
Date of start of the event
04/11/2020
Date of confirmation of the event
04/11/2020
Report date
28/12/2020
Date submitted to OIE
28/12/2020
Reason for notification
Recurrence of a listed disease
Date of previous occurrence
14/01/2018
Manifestation of disease
Clinical disease
Causal agent
Highly pathogenic avian influenza virus
Serotype
H5N8
Nature of diagnosis
Clinical, Laboratory (basic), Laboratory (advanced)
This event pertains to
a defined zone within the country
Related reports
Immediate notification (06/11/2020)
Follow-up report No. 1 (09/11/2020)
Follow-up report No. 2 (12/11/2020)
Follow-up report No. 3 (18/11/2020)
Follow-up report No. 4 (15/12/2020)
Follow-up report No. 5 (22/12/2020)
Follow-up report No. 6 (25/12/2020)
Follow-up report No. 7 (28/12/2020)
Follow-up report No. 8 (28/12/2020)
New outbreaks (8)

Outbreak 1
Kinokawa-City 1, Wakayama
Date of start of the outbreak
09/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
67000
5
5
66995
0
Affected population
Poultry(laying hens)
Outbreak 2
Mimasaka-City 1, Okayama
Date of start of the outbreak
10/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
529000
67
67
528933
0
Affected population
Poultry(chicks)
Outbreak 3
Mimasaka-City 2, Okayama
Date of start of the outbreak
10/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
118000

0
118000
0
Affected population
Poultry (chicks)
Outbreak 4
Higashiomi-City 1, Shiga
Date of start of the outbreak
12/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
11000
100
100
10900
0
Affected population
Poultry(laying hens)
Outbreak 5
Miyazaki-City 1, Miyazaki
Date of start of the outbreak
13/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
70000
16
16
69984
0
Affected population
Poulry(laying hens)
Outbreak 6
Mitoyo-City 15, Kagawa
Date of start of the outbreak
13/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
28000
5
5
27995
0
Affected population
Poultry(laying parents)
Outbreak 7
Miyazaki-City 2, Miyazaki
Date of start of the outbreak
13/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
45000

0
45000
0
Affected population
Poultry(laying hens)
Outbreak 8
Miyazaki-City 3, Miyazaki
Date of start of the outbreak
13/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
11000

0
11000
0
Affected population
Poultry(chicks)
Summary of outbreaks
Total outbreaks: 8
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
879000
193 **
193
878807
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Birds
**
0.02%
**
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
As of the outbreak 1 (Kinokawa-City 1) in this report (Case 21): On 9 December 2020, local veterinary service in Wakayama Pref. received notification from a laying hen farm and confirmed influenza A virus by antigen-capture kits. On 10 December 2020, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 11 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 11 December, stamping-out was completed. On 13 December, control measures (including disinfection) were completed. As of the outbreak 2 (Mimasaka-City 1) in this report (Case 22): On 10 December 2020, local veterinary service in Okayama Pref. received notification from a chick farm and confirmed influenza A virus by antigen-capture kits. On 11 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 12 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 14 December, stamping-out was completed. On 17 December, control measures (including disinfection) were completed. There is an epidemiologically related farm: the outbreak 3 (Mimasaka-City 2) in this report. As of the outbreak 3(Mimasaka-City 2) (epidemiologically related farms to Case 22): Stamping-out and other control measures (including disinfection) were completed on 14 and 17 December, respectively. As of the outbreak 4 (Higashiomi-City 1) in this report (Case 23); On 12 December 2020, local veterinary service in Shiga Pref. received notification from a layer hen farm and confirmed influenza A virus by antigen-capture kits. On 13 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 13 December, stamping-out was completed. On 14 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 14 December, control measures (including disinfection) were completed. As of the outbreak 5 (Miyazaki-City 1) in this report (Case 24): On 13 December 2020, local veterinary service in Miyazaki Pref. received notification from a broiler farm and confirmed influenza A virus by antigen-capture kits. On 14 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 15 December, stamping-out was completed. NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 17 December, control measures (including disinfection) were completed. There are epidemiologically related farms: the outbreak 6 (Miyazaki-City 2) and 7 (Miyazaki-City 3) in this report. As of the outbreak 6 (Miyazaki-City 2) (epidemiologically related farms to Case 24): Stamping-out and other control measures (including disinfection) were completed on 15 and 17 December, respectively. As of the outbreak 7 (Miyazaki-City 3) (epidemiologically related farms to Case 24): Stamping-out and other control measures (including disinfection) were completed on 15 and 17 December, respectively. As of the outbreak 8 (Mitoyo-City 15) in this report (Case 25): On 13 December 2020, local veterinary service in Oita Pref. received notification from a layer parent poultry farm and confirmed Influenza A virus by antigen-capture kits. On 14 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 15 December, stamping-out was completed. On 17 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 17 December, control measures (including disinfection) were completed. Movement and shipment restrictions have been imposed on these farms within a radius of 3 km and 3-10 km of the affected farm, respectively.

Control measures
Measures applied
Movement control inside the country
Screening
Quarantine
Stamping out
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
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
10/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
10/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
11/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
13/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
14/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
14/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
14/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
14/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
10/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
10/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
11/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
13/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
13/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
14/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
14/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
14/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
11/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
12/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
12/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
14/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
15/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
15/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
15/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
17/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
11/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
12/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
12/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
14/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
15/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
15/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
15/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
17/12/2020
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.