Taiwan - 10 new outbreaks of highly pathogenic influenza H5N2 in birds in farms and slaughterhouse (OIE, April 10, 2017)

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Highly pathogenic avian influenza, Chinese Taipei

Information received on 10/04/2017 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. 56 Date of start of the event 07/01/2015 Date of confirmation of the event 11/01/2015 Report date 10/04/2017 Date submitted to OIE 10/04/2017 Reason for notification Recurrence 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) Follow-up report No. 41 (22/02/2016) Follow-up report No. 42 (07/03/2016) Follow-up report No. 43 (11/04/2016) Follow-up report No. 44 (19/04/2016) Follow-up report No. 45 (05/05/2016) Follow-up report No. 46 (20/06/2016) Follow-up report No. 47 (21/09/2016) Follow-up report No. 48 (17/10/2016) Follow-up report No. 49 (09/01/2017) Follow-up report No. 50 (06/02/2017) Follow-up report No. 51 (01/03/2017) Follow-up report No. 52 (07/03/2017) Follow-up report No. 53 (17/03/2017) Follow-up report No. 54 (20/03/2017) Follow-up report No. 55 (27/03/2017) Follow-up report No. 56 (10/04/2017)

New outbreaks (10)

Outbreak 1 (2017-yl-56) Dongshi Township, YUNLIN COUNTY 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 8349 0 8349 0 Affected population Native chickens (2017-yl-56)

Outbreak 2 (2017-cy-9) Liujiao Township, CHIAYI COUNTY Date of start of the outbreak 24/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 13649 300 300 13349 0 Affected population Native chickens (2017-cy-9)

Outbreak 3 (2017-cy-10) Zhongpu Township, CHIAYI COUNTY Date of start of the outbreak 25/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 8605 70 70 8535 0 Affected population Chickens (2017-cy-10)

Outbreak 4 (2017-ch-8) Erlin Township, CHANGHUA COUNTY Date of start of the outbreak 27/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 21313 4324 4324 16989 0 Affected population Native chickens (2017-ch-8)

Outbreak 5 (2017-tn-13) Xiaying District, TAINAN CITY Date of start of the outbreak 27/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 5287 0 5287 0 Affected population Ducks (2017-tn-13)

Outbreak 6 (2017-nt-1) Zhushan Township, NANTOU COUNTY Date of start of the outbreak 27/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 3827 0 3827 0 Affected population Ducks (2017-nt-1)

Outbreak 7 (2017-yl-57) Taixi Township, YUNLIN COUNTY Date of start of the outbreak 29/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 30861 300 300 30561 0 Affected population Native chickens (2017-yl-57)

Outbreak 8 (2017-yl-58) Citong Township, YUNLIN COUNTY Date of start of the outbreak 31/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 2295 400 400 1895 0 Affected population Native chickens (2017-yl-58)

Outbreak 9 (2017-yl-59) Shuilin Township, YUNLIN COUNTY Date of start of the outbreak 31/03/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 16680 380 380 16300 0 Affected population Native chickens (2017-yl-59)

Outbreak 10 (2017-ntai-1) Taishan District, NEW TAIPEI CITY Date of start of the outbreak 01/04/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Slaughterhouse Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 93 0 93 0 Affected population Native chickenws in abattoir(2017-ntai-1)

Summary of outbreaks Total outbreaks: 10 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds 110959 5774 ** 5774 105185 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds ** 5.20% ** 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 Samples from 9 poultry farms in Nantou County, Yunlin County, Chiayi County, Changhua County and Tainan City were sent to the National Laboratory, Animal Health Research Institute (AHRI) for analysis. Highly pathogenic avian influenza H5N2 subtype was confirmed by the AHRI. The farms have been placed 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 a 3 km radius of the infected farms are under intensified surveillance for 3 months. Suspected signs were observed in poultry carcasses during post-mortem inspection in 1 abattoir in New Taipei City. Samples were sent to the AHRI for diagnosis. H5N2 subtype HPAI was confirmed by the AHRI. The carcasses were destroyed and thorough cleaning and disinfection have been conducted in the abattoir. After tracing back to the farm of origin, any positive results will be included in follow-up reports.

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 26/03/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 27/03/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 28/03/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 30/03/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 01/04/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 02/04/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 03/04/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 25/03/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 26/03/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 27/03/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 29/03/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 01/04/2017 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 02/04/2017 Positive William Binney (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 31/03/2017 Positive

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

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