Classical swine fever,
Japan
Information received on 21/02/2020 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. 46
Date of start of the event 03/09/2018
Date of confirmation of the event 09/09/2018
Report date 21/02/2020
Date submitted to OIE 21/02/2020
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)
New outbreaks (161)
Outbreak cluster 1 Gunnma, Gunma (5 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 5 0 5 0
Outbreak cluster 2 Saitama, Saitama (12 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 12 0 12 0
Outbreak cluster 3 Toyama, Toyama (5 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 5 2 3 0
Outbreak cluster 4 Ishikawa, Ishikawa (3 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 3 2 1 0
Outbreak cluster 5 Fukui, Fukui (8 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 8 0 8 0
Outbreak cluster 6 Nagano, Nagano (19 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 19 5 14 0
Outbreak cluster 7 Gifu, Gifu (25 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 25 5 20 0
Outbreak cluster 8 Aichi, Shizuoka (7 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 7 0 7 0
Outbreak 9 Mie, Mie
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 1 0 1 0
Outbreak cluster 10 Shiga, Shiga (27 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 27 0 27 0
Outbreak cluster 11 Shizuoka, Shizuoka (49 outbreaks)
Date of start of the outbreak 15/01/2020
Outbreak status Resolved (10/02/2020)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 49 20 29 0
Summary of outbreaks Total outbreaks: 161
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 161 34 127 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Wild boar:Sus scrofa(Suidae) ** ** 21.12% **
*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 Summary of the wild boar surveillance (as of 10th February) [Gifu prefecture (since 13th of September 2018)] Tested (RT-PCR): 3,025 wild boars, Positive: 1,163 [Aichi prefecture (since 14th of September 2018)] Tested (RT-PCR): 1,499 wild boars, Positive: 117 [Nagano prefecture (since 14th of September 2018)] Tested (RT-PCR): 620 wild boars, Positive: 168 [Mie prefecture (since 14th of September 2018)] Tested (RT-PCR): 1,363 wild boars, Positive: 34 [Fukui prefecture (since 14th September 2018)] Tested (RT-PCR): 450 wild boars, Positive: 52 [Toyama prefecture (since 14th September 2018)] Tested (RT-PCR): 220 wild boars, Positive: 36 [Gunma prefecture (since 14th September 2018)] Tested (RT-PCR): 813 wild boars, Positive: 20 [Saitama prefecture (since 14th September 2018)] Tested (RT-PCR): 695 wild boars, Positive: 64 [Ishikawa prefecture (since 14th September 2018)] Tested (RT-PCR): 236 wild boars, Positive: 17 [Shiga prefecture (since 14th September 2018) Tested (RT-PCR): 515 wild boars, Positive: 127 [Shizuoka prefecture (since 14th of September 2018)] Tested (RT-PCR): 1019 wild boars, Positive: 89 [Yamanashi prefecture (since 14th of September 2018)] Tested (RT-PCR): 115 wild boars, Positive: 3 [Other 32 prefectures (since 14th of September 2018) Tested (RT-PCR): 1484 wild boars, Positive: 0 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 is practiced in the following prefectures, Chiba, Ibaraki, Tochigi, Gunma, Toyama, Ishikawa, Fukui, Nagano, Gifu, Aichi, Mie, Shiga, Saitama, Shizuoka, Yamanashi, Kanagawa, Tokyo, Kyoto, Niigata and Nara. 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
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations