Japan - Chicken cull under way in Miyagi and Chiba - HP H5N6 confirmed by OIE

[Commonground]

March 24, 2017
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Meanwhile, the same virus was detected among 118 dead birds at a farm in the city of Asahi, Chiba Prefecture, during the same time. Prefectural authorities have begun culling about 68,000 chickens at the farm with SDF assistance.

Both prefectures aim to complete the culling process by next Monday.

https://www3.nhk.or.jp/nhkworld/en/news/20170324_21/

[Pathfinder]

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 Reason for notification Reoccurrence 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)

New outbreaks (2)

Outbreak 1 Kurihara-shi, MIYAGI Date of start of the outbreak 23/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 220000 45 45 0 Affected population Poultry (layers)

Outbreak 2 Asahi-shi, CHIBA Date of start of the outbreak 23/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 68000 26 26 0 Affected population Poultry (layers)

Summary of outbreaks Total outbreaks: 2 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds 288000 71 71 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% ** *Removed from the susceptible population through death, destruction and/or slaughter **Not calculated because of missing information

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 / Disinfestation 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.

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http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=23357