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Classical swine fever,
Japan
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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
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Summary
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| Outbreak 1 (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 |
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| Affected population |
Cases: one breeding sow, 26 fattening pigs and two suckling pigs. |
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| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Swine |
610 |
29 |
29 |
581 |
0 |
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| 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% |
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| *Removed from the susceptible population through death, destruction and/or slaughter |
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Epidemiology
| Source of the outbreak(s) or origin of infection |
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| 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.
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Control measures
| Measures applied |
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Movement control inside the country
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Surveillance within containment and/or protection zone
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Screening
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Quarantine
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Official disposal of carcasses, by-products and waste
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Stamping out
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Control of wildlife reservoirs
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Disinfection
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Ante and post-mortem inspections
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Vaccination prohibited
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No treatment of affected animals
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| Measures to be applied |
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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 |
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Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. |
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Map of outbreak locations
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