Highly pathogenic avian influenza,
Japan
Information received on 16/01/2015 from Dr Toshiro Kawashima, CVO, Deputy Director-General, Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, Tokyo, Japan
Summary
Report type Follow-up report No. 10
Date of start of the event 03/11/2014
Date of confirmation of the event 13/11/2014
Report date 16/01/2015
Date submitted to OIE 16/01/2015
Date event resolved 17/02/2015
Reason for notification Recurrence of a listed disease
Date of previous occurrence 16/04/2014
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N8
Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (13/11/2014)
Follow-up report No. 1 (21/11/2014)
Follow-up report No. 2 (25/11/2014)
Follow-up report No. 3 (04/12/2014)
Follow-up report No. 4 (16/12/2014)
Follow-up report No. 5 (19/12/2014)
Follow-up report No. 6 (26/12/2014)
Follow-up report No. 7 (29/12/2014)
Follow-up report No. 8 (30/12/2014)
Follow-up report No. 9 (09/01/2015)
Follow-up report No. 10 (16/01/2015)
Follow-up report No. 11 (20/01/2015)
Follow-up report No. 12 (30/01/2015)
Follow-up report No. 13 (05/02/2015)
Follow-up report No. 14 (13/02/2015)
Follow-up report No. 15 (20/02/2015)
Follow-up report No. 16 (24/04/2015)
New outbreaks (1)
Outbreak 1 Kasaoka-shi, OKAYAMA
Date of start of the outbreak 15/01/2015
Outbreak status Resolved (23/01/2015)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 200015 15 15 200000 0
Affected population Poultry (layer)
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 200015 15 15 200000 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.01% 0.01% 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 15 January 2015, the local veterinary service in Okayama prefecture received a notification from a layer farm on an increase in the number of dead birds. The samples were sent to the laboratory of the local veterinary service centre (Okayama Livestock Hygiene Centre). The samples from dead birds were influenza A virus positive by antigen-capture kits. On the same day, the centre started RT-PCR test and confirmed that the subtype was H5. Stamping-out policy is applied to the affected farm. Destruction of all the susceptible birds in the affected farm (approx. 200,000 birds) is ongoing. Movement restrictions are imposed on the farms within the radius of 3km of the affected farm. Shipment restrictions are imposed on the farms within the radius of 3-10km of the affected farm. The pathogenicity and the NA subtype have not yet been identified and are going to be determined by the National Institute of Animal Health (NIAH). Follow-up information on the second outbreak in poultry in Miyazaki reported in the follow-up report No. 7: On 13 January 2015, shipment restriction (3-10km radius around the affected farm) was lifted since the second confirmation test of the farms within the movement restriction zone proved freedom from avian influenza virus. The confirmation test used clinical inspection, serum antibody test and virus isolation and obtained negative results in all the tests. Follow-up information on the outbreak in poultry in Yamaguchi reported in the follow-up report No.8: On 16 January 2015, shipment restriction (3-10km radius around the affected farm) was lifted since the second confirmation test of the farms within the movement restriction zone proved freedom from avian influenza virus. The confirmation test used clinical inspection, serum antibody test and virus isolation and obtained negative results in all the tests.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Disinfection / Disinfestation
  • Quarantine
  • Stamping out
  • Control of wildlife reservoirs
  • 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
Okayama Livestock Hygiene Centre (Local laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 15/01/2015 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations