Highly pathogenic avian influenza,
Japan
Information received on 12/01/2018 from Dr Kazuo Ito, Director, International Animal Health Affairs Office, 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 10/01/2018
Date of confirmation of the event 12/01/2018
Report date 12/01/2018
Date submitted to OIE 12/01/2018
Date event resolved 14/01/2018
Reason for notification Recurrence of a listed disease
Date of previous occurrence 27/03/2017
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N6
Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (12/01/2018)
Follow-up report No. 1 (19/01/2018)
Follow-up report No. 2 (02/02/2018)
Follow-up report No. 3 (15/04/2018)
New outbreaks (1)
Outbreak 1 Sanuki-shi, Kagawa
Date of start of the outbreak 10/01/2018
Outbreak status Resolved (14/01/2018)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 51000 55 55 50945 0
Affected population Poultry (broilers)
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 51000 55 55 50945 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.11% 0.11% 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 10 January 2018, the local veterinary service in Kagawa Prefecture received a notification from a domestic broilers farm on an increase in the number of dead birds (55 birds on the same day). The samples were sent to the laboratory of the local veterinary service (Tobu Livestock Hygiene Service Centre) and the samples from dead birds and live birds were confirmed as avian influenza virus positive by antigen-capture kits. On 11 January, the Centre conducted RT-PCR and RRT-PCR tests and confirmed that the subtype was H5. On 12 January, the sequencing of the H5 gene was carried out by the National Institute of Animal Health (NIAH) and the causative virus was determined as highly pathogenic avian influenza virus. On the same day, NIAH conducted the RT-PCR test and confirmed that the subtype of the virus was H5N6. Stamping-out policy was applied to the affected farm. Destruction of all the susceptible 51000 birds in the affected farm and 40000 birds in an epidemiologically linked farm is being implemented. Movement and shipment restrictions are imposed on the farms within a radius of 3 km and 3-10 km of the affected farm respectively. Full genome sequencing of the virus is undergoing.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Quarantine
  • Stamping out
  • Disinfection
  • 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
Tobu Livestock Hygiene Service Centre (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 11/01/2018 Positive
Tobu Livestock Hygiene Service Centre (Local laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 11/01/2018 Positive
National Institute of Animal Health (National laboratory) Birds gene sequencing 12/01/2018 Positive
National Institute of Animal Health (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 12/01/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations