Taiwan - 4 new outbreaks of highly pathogenic avian influenza H5N2 in poultry farms in Taoyuan City and Tainan City (OIE, February 02, 2016)

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Highly pathogenic avian influenza, Chinese Taipei

Information received on 02/02/2016 from Dr Tai-Hwa Shih, Chief Veterinary Officer Deputy Director General, Bureau of Animal and Plant Health Inspection and Quarantine Council of Agriculture Executive Yuan, Ministry of Agriculture, Taipei, Chinese Taipei

Summary Report type Follow-up report No. 40 Date of start of the event 07/01/2015 Date of confirmation of the event 11/01/2015 Report date 02/02/2016 Date submitted to OIE 02/02/2016 Reason for notification Reoccurrence of a listed disease Date of previous occurrence 23/07/2014 Manifestation of disease Clinical disease Causal agent Highly pathogenic avian influenza virus Serotype H5N2 Nature of diagnosis Clinical, Laboratory (advanced) This event pertains to a defined zone within the country Related reports Immediate notification (12/01/2015) Follow-up report No. 1 (13/01/2015) Follow-up report No. 2 (15/01/2015) Follow-up report No. 3 (16/01/2015) Follow-up report No. 4 (19/01/2015) Follow-up report No. 5 (21/01/2015) Follow-up report No. 6 (28/01/2015) Follow-up report No. 7 (04/02/2015) Follow-up report No. 8 (11/02/2015) Follow-up report No. 9 (17/02/2015) Follow-up report No. 10 (26/02/2015) Follow-up report No. 11 (04/03/2015) Follow-up report No. 12 (12/03/2015) Follow-up report No. 13 (19/03/2015) Follow-up report No. 14 (25/03/2015) Follow-up report No. 15 (02/04/2015) Follow-up report No. 16 (14/04/2015) Follow-up report No. 17 (17/04/2015) Follow-up report No. 18 (24/04/2015) Follow-up report No. 19 (01/05/2015) Follow-up report No. 20 (11/05/2015) Follow-up report No. 21 (18/05/2015) Follow-up report No. 22 (29/05/2015) Follow-up report No. 23 (04/06/2015) Follow-up report No. 24 (12/06/2015) Follow-up report No. 25 (18/06/2015) Follow-up report No. 26 (07/07/2015) Follow-up report No. 27 (13/07/2015) Follow-up report No. 28 (20/07/2015) Follow-up report No. 29 (27/07/2015) Follow-up report No. 30 (31/07/2015) Follow-up report No. 31 (11/08/2015) Follow-up report No. 32 (24/08/2015) Follow-up report No. 33 (04/09/2015) Follow-up report No. 34 (02/10/2015) Follow-up report No. 35 (21/10/2015) Follow-up report No. 36 (30/10/2015) Follow-up report No. 37 (08/12/2015) Follow-up report No. 38 (04/01/2016) Follow-up report No. 39 (15/01/2016) Follow-up report No. 40 (02/02/2016)

New outbreaks (4)

Outbreak 1 (ty-2016-1) Yangmei District, TAOYUAN COUNTY Date of start of the outbreak 01/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 7530 625 625 6905 0 Affected population Ducks (ty-2016-1)

Outbreak 2 (tn-2016-1) Houbi District, TAINAN CITY Date of start of the outbreak 11/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 23000 14160 14160 8840 0 Affected population Ducks (tn-2016-1)

Outbreak 3 (tn-2016-2) Houbi District, TAINAN CITY Date of start of the outbreak 11/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 3000 1829 1829 1171 0 Affected population Ducks (tn-2016-2)

Outbreak 4 (tn-2016-3) Madou District, TAINAN CITY Date of start of the outbreak 15/01/2016 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 1100 673 673 427 0 Affected population Geese (tn-2016-3)

Summary of outbreaks Total outbreaks: 4 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds 34630 17287 17287 17343 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 49.92% 49.92% 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 Abnormal mortalities were observed in four poultry farms in Taoyuan City and Tainan City. Samples were sent to the National Laboratory (AHRI) for diagnosis. H5N2 subtype HPAI was confirmed by AHRI. These farms have been put under movement restriction. All animals on the infected farms have been culled. Thorough cleaning and disinfection have been conducted after stamping out operation. Surrounding poultry farms within 3 km radius of the infected farms are under intensified surveillance for 3 months.

Control measures Measures applied Movement control inside the country Screening Disinfection / Disinfestation Quarantine Stamping out Zoning 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 Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 14/01/2016 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 19/01/2016 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 13/01/2016 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 17/01/2016 Positive

Future Reporting The event is continuing. Weekly follow-up reports will be submitted.

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