Information received on 22/12/2020 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. 5
Date of start of the event
04/11/2020
Date of confirmation of the event
04/11/2020
Report date
22/12/2020
Date submitted to OIE
22/12/2020
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)
New outbreaks (5)

Outbreak 1
Tsuno-Town 1, Miyazaki
Date of start of the outbreak
01/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
30000
34
34
29966
0
Affected population
Poultry(broiler)
Outbreak 2
Mitoyo-City 12, Kagawa
Date of start of the outbreak
01/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
228000
6
6
227994
0
Affected population
Poultry(layer)
Outbreak 3
Mitoyo-City 13, Kagawa
Date of start of the outbreak
01/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
125000

0
125000
0
Affected population
Poultry(layer)
Outbreak 4
Mitoyo-City 14, Kagawa
Date of start of the outbreak
01/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
20000
7
7
19993
0
Affected population
Poultry(layer)
Outbreak 5
Miyakonozyo-City 1, Miyazaki
Date of start of the outbreak
02/12/2020
Outbreak status
Continuing (or date resolved not provided)
Epidemiological unit
Farm
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
36000
72
72
35928
0
Affected population
Poultry(broiler)
Summary of outbreaks
Total outbreaks: 5
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Birds
439000
119 **
119
438881
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 in Tsuno-Town 1 in this report (Case 12); On 1 December 2020, local veterinary service in Miyazaki Pref. received notification from a broiler farm and confirmed Influenza A virus by antigen-capture kits. On 2 December, LHSC conformed H5 by RT-PCR and RRT-PCR. On 2 December, stamping-out was completed. On 2 December, control measures (including disinfection) were completed. On 4 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. As of the outbreak in Mitoyo-City 12 in this report (Case 13); On 1 December 2020, local veterinary service in Miyazaki Pref. received notification from a laying hen farm and confirmed Influenza A virus by antigen-capture kits. On 2 December, LHSC conformed H5 by RT-PCR and RRT-PCR. On 4 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing and stamping-out was completed. On 12 December, control measures (including disinfection) were completed. There is an epidemiologically related farm; the outbreak in Mitoyo-City 2 in this report. As of the outbreak in Mitoyo-City 13 (epidemiologically related farms to Case 13) stamping-out and control measures (including disinfection) were completed on 2 and 12 December, respectively. As of the outbreak in Mitoyo-City 14 in this report(Case 14); On 1 December 2020, local veterinary service in Kagawa Pref. received notification from a laying hen farm and confirmed Influenza A virus by antigen-capture kits. On 2 December, LHSC conformed H5 by RT-PCR and RRT-PCR. On 2 December, stamping-out was completed. On 4 December, NIAH confirmed H5N8 HPAI by RT-PCR and sequencing. On 7 December, control measures (including disinfection) were completed. As of the outbreak in Miyakonozyo-City 1 in this report (Case 15); On 2 December 2020, local veterinary service in Miyazaki Pref. received notification from a broiler farm and confirmed Influenza A virus by antigen-capture kits. On 3 December, LHSC conformed H5 by RT-PCR and RRT-PCR and stamping-out completed. On 3 December, Control measures (including disinfection) completed. On 4 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)
01/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
02/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
02/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
03/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
02/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
02/12/2020
Positive
Livestock Hygiene Service Centre (Local laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
03/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
04/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
04/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
04/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
gene sequencing
04/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
02/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
02/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
04/12/2020
Positive
National Institute of Animal Health (National laboratory)
Birds
reverse transcription - polymerase chain reaction (RT-PCR)
04/12/2020
Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.