Classical swine fever,
Japan
Information received on 25/09/2020 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. 55
Date of start of the event 03/09/2018
Date of confirmation of the event 09/09/2018
Report date 25/09/2020
Date submitted to OIE 25/09/2020
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)
New outbreaks (72)
Outbreak cluster 1 Fukushima, Fukushima (5 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 5 5 0 0
Outbreak cluster 2 Gunma, Gunma (9 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 9 2 7 0
Outbreak cluster 3 Saitama, Saitama (3 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
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 4 Niigata, Niigata (1 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 1 0 1 0
Outbreak cluster 5 Fukui, Fukui (5 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
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 6 Yamanashi, Yamanashi (8 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 8 7 1 0
Outbreak cluster 7 Nagano, Nagano (7 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 7 3 4 0
Outbreak cluster 8 Shizuoka, Shizuoka (2 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
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 9 Aichi, Aichi (1 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
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 10 Mie, Mie (21 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 21 0 21 0
Outbreak cluster 11 Shiga, Shiga (10 outbreaks)
Date of start of the outbreak 27/08/2020
Outbreak status Resolved (24/09/2020)
Epidemiological unit Forest
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Wild boar:Sus scrofa(Suidae) 10 0 10 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 20 52 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Wild boar:Sus scrofa(Suidae) ** ** 27.78% **
*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 24th September) [Fukushima prefecture (since 9th September 2020)] Tested (RT-PCR): 53 wild boars, Positive: 5 [Ibaraki prefecture (since 26th June 2020)] Tested (RT-PCR): 829 wild boars, Positive: 1 [Gunma prefecture (since 14th September 2018)] Tested (RT-PCR): 1,482 wild boars, Positive: 50 [Saitama prefecture (since 14th September 2018)] Tested (RT-PCR): 958 wild boars, Positive: 108 [Tokyo prefecture (since 2nd July 2020)] Tested (RT-PCR): 106 wild boars, Positive: 5 [Kanagawa prefecture (since 14th September 2018] Tested (RT-PCR): 465 wild boars, Positive: 2 [Niigata prefecture (since 14th September 2018] Tested (RT-PCR): 218 wild boars, Positive: 10 [Toyama prefecture (since 14th September 2018)] Tested (RT-PCR): 428 wild boars, Positive: 76 [Ishikawa prefecture (since 14th September 2018)] Tested (RT-PCR): 425 wild boars, Positive: 39 [Fukui prefecture (since 14th September 2018)] Tested (RT-PCR): 981 wild boars, Positive: 90 [Yamanashi prefecture (since 14th of September 2018)] Tested (RT-PCR): 246 wild boars, Positive: 45 [Nagano prefecture (since 14th of September 2018)] Tested (RT-PCR): 947 wild boars, Positive: 242 [Gifu prefecture (since 13th of September 2018)] Tested (RT-PCR): 4,327 wild boars, Positive: 1,204 [Shizuoka prefecture (since 14th of September 2018)] Tested (RT-PCR): 2,240 wild boars, Positive: 240 [Aichi prefecture (since 14th of September 2018)] Tested (RT-PCR): 2,111 wild boars, Positive: 137 [Mie prefecture (since 14th of September 2018)] Tested (RT-PCR): 2,824 wild boars, Positive: 205 [Shiga prefecture (since 14th September 2018) Tested (RT-PCR): 982 wild boars, Positive: 221 [Kyoto prefecture (since 14th of September 2018)] Tested (RT-PCR): 188 wild boars, Positive: 4 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, Nagano, Nara, Niigata, Osaka, Okinawa, Saitama, Shiga, Shizuoka, Tochigi, Tokyo, Toyama, Wakayama, 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
  • Ante and post-mortem inspections
  • Disinfection
  • Control of wildlife reservoirs
  • Stamping out
  • Official disposal of carcasses, by-products and waste
  • Quarantine
  • Screening
  • Surveillance within containment and/or protection zone
  • Surveillance outside containment and/or protection zone
  • Movement control inside the country
  • 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