Classical swine fever,
Japan
Information received on 10/02/2020 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. 45
Date of start of the event 03/09/2018
Date of confirmation of the event 09/09/2018
Report date 10/02/2020
Date submitted to OIE 10/02/2020
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)
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)
New outbreaks (1)
Outbreak 1 (56) Okinawa city, Okinawa
Date of start of the outbreak 01/02/2020
Outbreak status Resolved (06/02/2020)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 1860 1860 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 1860 ** 1860 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Swine ** ** ** **
*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. The 56th affected farm (Okinawa city in Okinawa) On February 1st, some pigs were found dead and it was reported to the Local Hygiene Service Centre (LHSC). The 56th affected farm is located within a 3-km-radius from the 52th, 53rd, 54th and 55th affected farms. RT-PCR for CSFV was conducted at the LHSC and it was found positive on February 2nd. On February 6th, stamping out and disinfection were completed at the 56th affected farm. 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: 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 implements 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
Okinawa Local Hygiene Service Centre (Local laboratory) Swine reverse transcription - polymerase chain reaction (RT-PCR) 02/02/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations