Information received on 04/01/2021 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. 9
Date of start of the event
04/11/2020
Date of confirmation of the event
04/11/2020
Report date
04/01/2021
Date submitted to OIE
04/01/2021
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)
Follow-up report No. 9 (04/01/2021)
New outbreaks (4)

Outbreak 1
Mitoyo-City 18, Kagawa
Date of start of the outbreak
22/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
25000
44
44
24956
0
Affected population
Poultry(broiler)
Outbreak 2
Isumi-City 1, Chiba
Date of start of the outbreak
23/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
1160000
222
222
1159778
0
Affected population
Poultry(layer)
Outbreak 3
Kobayashi-City 2, Miyazaki
Date of start of the outbreak
29/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
154000
22
22
153978
0
Affected population
Poultry(broiler)
Outbreak 4
Minokamo-City 1, Gifu
Date of start of the outbreak
01/01/2021
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
68000

0
68000
0
Affected population
Poultry(layer)
Summary of outbreaks
Total outbreaks: 4
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
1407000
288 **
288
1406712
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 (Mitoyo-City 18) in this report (Case 31): On 22 December 2020, local veterinary service in Kagawa Pref. received notification from a broiler farm and confirmed influenza A virus by antigen-capture kits. On 23 December 2020, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 24 December, stamping-out was completed. On 25 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 25 December, control measures (including disinfection) were completed. As of the outbreak 2 (Isumi-City 1) in this report (Case 32): On 23 December 2020, local veterinary service in Chiba Pref. received notification from a layer farm and confirmed influenza A virus by antigen-capture kits. On 24 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 24 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 2 January 2021, stamping-out was completed. As of the outbreak 3 (Kobayashi-City 2) in this report (Case 33): On 29 December 2020, local veterinary service in Miyazaki Pref. received notification from a broiler farm and confirmed influenza A virus by antigen-capture kits. On 30 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 30 December, stamping-out was completed. On 31 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 31 December, control measures (including disinfection) were completed. As of the outbreak 4 (Minokamo-City 1) in this report (Case 34): On 1 January 2021, local veterinary service in Gifu Pref. received notification from a layer farm and confirmed influenza A virus by antigen-capture kits. On 2 January, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 3 January, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. Stamping out is being carried out. 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. Follow-up information on the Case 9 (Munakata-City 1), the Case 10 (Awaji-City 1), the Case 11 (Hyuga-City 1) and the Case 12 (Tsuno-Town 1) reported in the Follow-up report No.4; As of the Case 9 (Munakata-City 1); On 14 December, shipment restrictions were lifted. On 20 December, movement restrictions were lifted. As of the Case 10 (Awaji-City 1); On 14 December, shipment restrictions were lifted. On 25 December, movement restrictions were lifted. As of the Case 11 (Hyuga-City 1); On 13 December, shipment restrictions were lifted. On 24 December, movement restrictions were lifted. As of the Case 12 (Tsuno-Town 1); On 17 December, shipment restrictions were lifted. On 24 December, movement restrictions were lifted. Follow-up information on the Case 15 (Miyakonojo-City 1) reported in the Follow-up report No.5; As of the Case 15 (Miyakonojo-City 1); On 23 December, shipment restrictions were lifted. Follow-up information on the Case 16 (Gojo-City 1), the Case 17 (Mihara-City 1), the Case 18 (Miyakonojo-City 2), the Case 19 (Kobayashi-City 1) and the Case 20 (Saeki-City 1) reported in the Follow-up report No.6; As of the Case 16 (Gojo-City 1); On 27 December, shipment restrictions were lifted. On 2 January, movement restrictions were lifted. As of the Case 17 (Mihara-City 1); On 2 January, shipment restrictions were lifted. As of the Case 18 (Miyakonojo-City 1); On 23 December, shipment restrictions were lifted. As of the Case 19 (Kobayashi-City 1); On 23 December, shipment restrictions were lifted. As of the Case 20 (Saeki-City 1); On 27 December, shipment restrictions were lifted. On 2 January, movement restrictions were lifted.

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)
23/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
23/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
24/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
24/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
30/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
02/01/2021
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
23/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
23/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
24/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
24/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
30/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
02/01/2021
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
24/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
25/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
25/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
31/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
03/01/2021
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
24/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
25/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
25/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
31/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
03/01/2021
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.