Classical swine fever,
Japan
Information received on 09/09/2018 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 Immediate notification
Date of start of the event 03/09/2018
Date of confirmation of the event 09/09/2018
Report date 09/09/2018
Date submitted to OIE 09/09/2018
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)
New outbreaks (1)
Outbreak 1 Gifu City, Gifu
Date of start of the outbreak 03/09/2018
Outbreak status Resolved (11/09/2018)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 610 29 29 581 0
Affected population Cases: one breeding sow, 26 fattening pigs and two suckling pigs.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 610 29 29 581 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Swine 4.75% 4.75% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments On 3rd September, fattening pigs were found dead and reported to Gifu Central Livestock Hygiene Service Centre (LHSC) by a veterinarian. On 8th September, the samples derived from pigs of reported farm tested positive for Pestivirus by RT-PCR. But the result of pestivirus specific FAT was negative. On the same day, the National Institute of Animal Health (NIAH) carried out CSFV specific RT-PCR and FAT to samples transported from Gifu City, and the result were positive and negative respectively. On 9th September, sequencing analysis of the virus RNA was completed and the NIAH confirmed that this is the case of classical swine fever. Note: Possibility of a case of African swine fever was denied by NIAH. Movement and shipment restrictions are imposed on the hog farms within a radius of 3 km and 3-10 km of the affected farm respectively. Stamping-out is being carried out on the affected farm.
Control measures
Measures applied
  • Movement control inside the country
  • 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 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
Gifu Central Livestock Hygiene Service Centre (Local laboratory) Swine direct fluorescent antibody (FAT) test 08/09/2018 Negative
Gifu Central Livestock Hygiene Service Centre (Local laboratory) Swine reverse transcription - polymerase chain reaction (RT-PCR) 08/09/2018 Positive
National Institute of Animal Health (OIE Reference Laboratory) Swine direct fluorescent antibody (FAT) test 08/09/2018 Negative
National Institute of Animal Health (OIE Reference Laboratory) Swine reverse transcription - polymerase chain reaction (RT-PCR) 08/09/2018 Positive
National Institute of Animal Health (OIE Reference Laboratory) Swine virus sequencing 09/09/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations