Highly pathogenic avian influenza,
Japan
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. 8
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)
Follow-up report No. 9 (04/01/2021)
New outbreaks (8)
Outbreak 1 Hyuga-City 2, Miyazaki
Date of start of the outbreak 14/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 46000 60 60 45940 0
Affected population Poultry(broiler)
Outbreak 2 Kawaminami-Town 1, Miyazaki
Date of start of the outbreak 14/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Slaughterhouse
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 20000 0 20000 0
Affected population Poultry(broiler)
Outbreak 3 Mitoyo-City 17, Kagawa
Date of start of the outbreak 15/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 15000 0 15000 0
Affected population Poultry(broiler)
Outbreak 4 Sukumo-City 1, Kochi
Date of start of the outbreak 15/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 27000 40 40 26960 0
Affected population Poultry(layer)
Outbreak 5 Mitoyo-City 16, Kagawa
Date of start of the outbreak 15/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 14000 34 34 13966 0
Affected population Poultry(broiler)
Outbreak 6 Miyazaki-City 4, Miyazaki
Date of start of the outbreak 18/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 34000 21 21 33979 0
Affected population Poultry(broiler parent)
Outbreak 7 Awa-City 1, Tokushima
Date of start of the outbreak 18/12/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 8000 60 60 7940 0
Affected population Poultry(layer)
Outbreak 8 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 126 126 1159874 0
Affected population Poultry(layer)
Summary of outbreaks Total outbreaks: 8
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 1324000 341 ** 341 1323659 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 (Hyuga-City 2) in this report (Case 26): On 14 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 2020, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 15 December, stamping-out and other control measures (including disinfection) were completed. On 17 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. There is an epidemiologically related poultry slaughterhouse: the outbreak 2 (Hyuga-City 2) in this report. As of the outbreak 2 (Kawaminami-Town 1) (epidemiologically related poultry slaughterhouse to Case 26): Stamping-out and control measures (including disinfection) were completed on 15 December. As of the outbreak 3 (Sukumo-City 1) in this report (Case 27): On 15 December 2020, local veterinary service in Kochi Pref. received notification from a layer farm and confirmed influenza A virus by antigen-capture kits. On 16 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 17 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 17 December, stamping-out was completed. On 19 December, control measures (including disinfection) were completed. As of the outbreak 4 (Mitoyo-City 16) in this report (Case 28): On 15 December 2020, local veterinary service in Kagawa Pref. received notification from a broiler farm and confirmed influenza A virus by antigen-capture kits. On 16 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 17 December, stamping-out was completed. On 19 December, control measures (including disinfection) were completed. On 21 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. There is an epidemiologically related farm: the outbreak 5 (Mitoyo-City 17) in this report. As of the outbreak 5 (Mitoyo-City 17) (epidemiologically related farm to Case 28): Stamping-out and other control measures (including disinfection) were completed on 17 and 19 December, respectively. As of the outbreak 6 (Awa-City 1) in this report (Case 29): On 18 December 2020, local veterinary service in Tokushima Pref. received notification from a layer farm and confirmed influenza A virus by antigen-capture kits. On 14 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 19 December, stamping-out was completed. On 20 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 21 December, control measures (including disinfection) were completed. As of the outbreak 7 (Miyazaki-City 4) in this report(Case 30): On 18 December 2020, local veterinary service in Miyazaki Pref. received notification from a broiler parent farm and confirmed influenza A virus by antigen-capture kits. On 19 December, LHSC confirmed H5 by RT-PCR and RRT-PCR. On 20 December, stamping-out and control measures (including disinfection) were completed. On 21 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. 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) 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) 16/12/2020 Positive
Livestock Hygiene Service Centre (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 16/12/2020 Positive
Livestock Hygiene Service Centre (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 16/12/2020 Positive
Livestock Hygiene Service Centre (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 18/12/2020 Positive
Livestock Hygiene Service Centre (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 19/12/2020 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 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) 16/12/2020 Positive
Livestock Hygiene Service Centre (Local laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 16/12/2020 Positive
Livestock Hygiene Service Centre (Local laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 16/12/2020 Positive
Livestock Hygiene Service Centre (Local laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 18/12/2020 Positive
Livestock Hygiene Service Centre (Local laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 19/12/2020 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
National Institute of Animal Health (National laboratory) Birds gene sequencing 17/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds gene sequencing 17/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds gene sequencing 17/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds gene sequencing 20/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds gene sequencing 21/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds gene sequencing 21/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds gene sequencing 21/12/2020 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 reverse transcription - polymerase chain reaction (RT-PCR) 17/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 17/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 17/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 20/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 21/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 21/12/2020 Positive
National Institute of Animal Health (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 21/12/2020 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
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations