Highly pathogenic avian influenza,
Japan
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 (3)
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 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 3 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: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 247000 66 ** 66 246934 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds ** 0.03% ** 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 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.
Map of outbreak locations