Highly pathogenic avian influenza,
Japan
Information received on 24/03/2017 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 Follow-up report No. 12
Date of start of the event 28/11/2016
Date of confirmation of the event 28/11/2016
Report date 23/03/2017
Date submitted to OIE 24/03/2017
Date event resolved 27/03/2017
Reason for notification Recurrence of a listed disease
Date of previous occurrence 17/02/2015
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N6
Nature of diagnosis Clinical, Laboratory (basic)
This event pertains to the whole country
Related reports Immediate notification (29/11/2016)
Follow-up report No. 1 (05/12/2016)
Follow-up report No. 2 (19/12/2016)
Follow-up report No. 3 (26/12/2016)
Follow-up report No. 4 (10/01/2017)
Follow-up report No. 5 (16/01/2017)
Follow-up report No. 6 (25/01/2017)
Follow-up report No. 7 (01/02/2017)
Follow-up report No. 8 (10/02/2017)
Follow-up report No. 9 (23/02/2017)
Follow-up report No. 10 (02/03/2017)
Follow-up report No. 11 (16/03/2017)
Follow-up report No. 12 (23/03/2017)
Follow-up report No. 13 (31/03/2017)
Follow-up report No. 14 (18/04/2017)
Follow-up report No. 15 (28/06/2017)
New outbreaks (2)
Outbreak 1 Kurihara-shi, Miyagi
Date of start of the outbreak 23/03/2017
Outbreak status Resolved (27/03/2017)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 220000 45 45 219955 0
Affected population Poultry (layers)
Outbreak 2 Asahi-shi, Chiba
Date of start of the outbreak 23/03/2017
Outbreak status Resolved (27/03/2017)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 68000 26 26 67974 0
Affected population Poultry (layers)
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 288000 71 71 287929 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.02% 0.02% 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 Outbreak 11 (Miyagi, Kurihara-shi) this report On 23 March 2017, the local veterinary service in Miyagi Prefecture received a notification from a domestic hen farm on an increase in the number of dead birds (45 birds on the same day). The samples from dead birds were confirmed to be influenza A virus positive by antigen-capture kits (on site) and to be subtype H5 by RT-PCR and RRT-PCR in Miyagi Livestock Hygiene Service Centre. Destruction of all the susceptible birds in the affected farm is being implemented. Movement and shipment restrictions are imposed on the farms within a radius of 3km and 3-10 km of the affected farm, respectively. Outbreak 12 (Chiba, Asahi-shi) this report On 23 March 2017, the local veterinary service in Chiba Prefecture received a notification from a domestic hen farm on an increase in the number of dead birds (26 birds on the same day). The samples from dead birds were confirmed to be influenza A virus positive by antigen-capture kits (on site) and to be subtype H5 by RT-PCR and RRT-PCR in Chu-ou Livestock Hygiene Service Centre. Destruction of all the susceptible birds in the affected farm is being implemented. Movement and shipment restrictions are imposed on the farms within a radius of 3km and 3-10 km of the affected farm, respectively.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Disinfection
  • Quarantine
  • Stamping out
  • 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
Chu-ou Livestock Hygiene Service Center (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 24/03/2017 Positive
Chu-ou Livestock Hygiene Service Center (Local laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 24/03/2017 Positive
Sendai Livestock Hygiene Service Center (Local laboratory) Birds rapid tests 23/03/2017 Positive
Sendai Livestock Hygiene Service Center (Local laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 24/03/2017 Positive
Sendai Livestock Hygiene Service Center (Local laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 24/03/2017 Positive
Tobu Livestock Hygiene Service Center (Local laboratory) Birds rapid tests 23/03/2017 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations