Classical swine fever,
Japan
Information received on 30/12/2020 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. 59
Date of start of the event 03/09/2018
Date of confirmation of the event 09/09/2018
Report date 25/12/2020
Date submitted to OIE 30/12/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 1992
Manifestation of disease Clinical disease
Causal agent Classical swine fever virus
Nature of diagnosis Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (09/09/2018)
Follow-up report No. 1 (18/09/2018)
Follow-up report No. 2 (26/09/2018)
Follow-up report No. 3 (01/10/2018)
Follow-up report No. 4 (09/10/2018)
Follow-up report No. 5 (16/11/2018)
Follow-up report No. 6 (22/11/2018)
Follow-up report No. 7 (03/12/2018)
Follow-up report No. 8 (10/12/2018)
Follow-up report No. 9 (18/12/2018)
Follow-up report No. 10 (25/12/2018)
Follow-up report No. 11 (07/01/2019)
Follow-up report No. 12 (16/01/2019)
Follow-up report No. 13 (22/01/2019)
Follow-up report No. 14 (29/01/2019)
Follow-up report No. 15 (06/02/2019)
Follow-up report No. 16 (14/02/2019)
Follow-up report No. 17 (22/02/2019)
Follow-up report No. 18 (01/03/2019)
Follow-up report No. 19 (08/03/2019)
Follow-up report No. 20 (15/03/2019)
Follow-up report No. 21 (25/03/2019)
Follow-up report No. 22 (01/04/2019)
Follow-up report No. 23 (08/04/2019)
Follow-up report No. 24 (12/04/2019)
Follow-up report No. 25 (19/04/2019)
Follow-up report No. 26 (26/04/2019)
Follow-up report No. 27 (17/05/2019)
Follow-up report No. 28 (26/05/2019)
Follow-up report No. 29 (07/06/2019)
Follow-up report No. 30 (21/06/2019)
Follow-up report No. 31 (23/07/2019)
Follow-up report No. 32 (06/08/2019)
Follow-up report No. 33 (10/08/2019)
Follow-up report No. 34 (18/08/2019)
Follow-up report No. 35 (13/09/2019)
Follow-up report No. 36 (24/09/2019)
Follow-up report No. 37 (11/10/2019)
Follow-up report No. 38 (01/11/2019)
Follow-up report No. 39 (19/11/2019)
Follow-up report No. 40 (29/11/2019)
Follow-up report No. 41 (20/12/2019)
Follow-up report No. 42 (27/12/2019)
Follow-up report No. 43 (08/01/2020)
Follow-up report No. 44 (21/01/2020)
Follow-up report No. 45 (10/02/2020)
Follow-up report No. 46 (21/02/2020)
Follow-up report No. 47 (06/03/2020)
Follow-up report No. 48 (25/03/2020)
Follow-up report No. 49 (23/04/2020)
Follow-up report No. 50 (26/05/2020)
Follow-up report No. 51 (22/06/2020)
Follow-up report No. 52 (06/07/2020)
Follow-up report No. 53 (31/07/2020)
Follow-up report No. 54 (28/08/2020)
Follow-up report No. 55 (25/09/2020)
Follow-up report No. 56 (28/09/2020)
Follow-up report No. 57 (02/11/2020)
Follow-up report No. 58 (27/11/2020)
Follow-up report No. 59 (25/12/2020)
Follow-up report No. 60 (04/01/2021)
New outbreaks (72)
Outbreak cluster 1 Fukushima, Fukushima (5 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 5 1 4 0
Outbreak cluster 2 Ibaraki, Ibaraki (1 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 1 1 0 0
Outbreak cluster 3 Tochigi, Tochigi (2 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 2 1 1 0
Outbreak cluster 4 Gunma, Gunma (10 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 10 4 6 0
Outbreak cluster 5 Saitama, Saitama (2 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 2 0 2 0
Outbreak cluster 6 Saitama, Saitama (2 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 2 0 2 0
Outbreak cluster 7 Niigata, Niigata (5 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 5 3 2 0
Outbreak cluster 8 Fukui, Fukui (11 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 11 0 11 0
Outbreak cluster 9 Nagano, Nagano (3 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 3 1 2 0
Outbreak cluster 10 Gifu, Gifu (2 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 2 0 2 0
Outbreak cluster 11 Shizuoka, Shizuoka (7 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 7 1 6 0
Outbreak cluster 12 Shiiga, Shiga (2 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 2 0 2 0
Outbreak cluster 13 Kyoto, Kyoto (5 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 5 3 2 0
Outbreak cluster 14 Osaka, Osaka (4 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 4 0 4 0
Outbreak cluster 15 Nara, Nara (4 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 4 3 1 0
Outbreak cluster 16 Wakayama, Wakayama (7 outbreaks)
Date of start of the outbreak 26/11/2020
Outbreak status Resolved (23/12/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 7 1 6 0
Summary of outbreaks Total outbreaks: 72
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 72 19 53 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Wild boar:Sus scrofa(Suidae) ** ** 26.39% **
*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 1.Summary of the wild boar surveillance (As of 23th December) [Fukushima prefecture (since 9th September 2020)] Tested (RT-PCR): 83 wild boars, Positive: 10 [Ibaraki prefecture (since 26th June 2020)] Tested (RT-PCR): 981 wild boars, Positive: 2 [Tochigi prefecture (since 20th November 2020)] Tested (RT-PCR): 559 wild boars, Positive: 3 [Gunma prefecture (since 14th September 2018)] Tested (RT-PCR): 1,881 wild boars, Positive: 76 [Saitama prefecture (since 14th September 2018)] Tested (RT-PCR): 1,127 wild boars, Positive: 115 [Tokyo prefecture (since 2nd July 2020)] Tested (RT-PCR): 121 wild boars, Positive: 8 [Kanagawa prefecture (since 14th September 2018] Tested (RT-PCR): 696 wild boars, Positive: 2 [Niigata prefecture (since 14th September 2018] Tested (RT-PCR): 297 wild boars, Positive: 22 [Toyama prefecture (since 14th September 2018)] Tested (RT-PCR): 584 wild boars, Positive: 80 [Ishikawa prefecture (since 14th September 2018)] Tested (RT-PCR): 609 wild boars, Positive: 41 [Fukui prefecture (since 14th September 2018)] Tested (RT-PCR): 1,207 wild boars, Positive: 108 [Yamanashi prefecture (since 14th of September 2018)] Tested (RT-PCR): 314 wild boars, Positive: 58 [Nagano prefecture (since 14th of September 2018)] Tested (RT-PCR): 1,064 wild boars, Positive: 256 [Gifu prefecture (since 13th of September 2018)] Tested (RT-PCR): 4,928 wild boars, Positive: 1,206 [Shizuoka prefecture (since 14th of September 2018)] Tested (RT-PCR): 3,088 wild boars, Positive: 276 [Aichi prefecture (since 14th of September 2018)] Tested (RT-PCR): 2,367 wild boars, Positive: 139 [Mie prefecture (since 14th of September 2018)] Tested (RT-PCR): 3,279 wild boars, Positive: 261 [Shiga prefecture (since 14th September 2018) Tested (RT-PCR): 1.114 wild boars, Positive: 240 [Kyoto prefecture (since 14th of September 2018)] Tested (RT-PCR): 233 wild boars, Positive: 19 [Osaka prefecture (since 29th of October 2020)] Tested (RT-PCR): 22 wild boars, Positive: 5 [Nara prefecture (since 14th of October 2020)] Tested (RT-PCR): 268 wild boars, Positive: 11 [Wakayama prefecture (since 28th of October 2020)] Tested (RT-PCR): 273 wild boars, Positive: 19 Note 1: On 15th October 2019, Japan amended the Specific Infections Livestock Disease Control Guidelines for CSF to allow vaccination in domestic pigs in designated prefectures (“vaccination recommended areas”). The Vaccination in domestic pigs are practiced in the following prefectures, Aichi, Chiba, Fukui, Fukushima, Gifu, Gunma, Hyogo, Ibaraki, Ishikawa, Kanagawa, Kyoto, Mie, Miyagi, Nagano, Nara, Niigata, Osaka, Okinawa, Saitama, Shiga, Shizuoka, Tochigi, Tokyo, Toyama, Wakayama, Yamagata, Yamanashi. Note 2: When CSF outbreaks happen, Japan implement movement restrictions in the Shipment Restriction Zone (SRZ), which is established within 3-10 km radius of the affected farm, and in the Movement Restriction Zone (MRZ), which is established within 3km radius of the affected farm. SRZ will be lifted when all the results of active surveillance program are negative, and 17 days have passed after the completion of full implementation of control measures (stamping out, disinfection etc.). MRZ will be lifted when all the results of active surveillance program are negative, and 28 days have passed after the completion of full implementation of control measures (stamping out, disinfection etc.).
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Screening
  • Quarantine
  • Official disposal of carcasses, by-products and waste
  • Stamping out
  • Control of wildlife reservoirs
  • Disinfection
  • Ante and post-mortem inspections
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Gunma Livestock Hygene Service Centre (Local laboratory) Swine reverse transcription - polymerase chain reaction (RT-PCR) 26/09/2020 Positive
National Institute of Animal Health (OIE Reference Laboratory) Swine gene sequencing 26/09/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations