Taiwan - 6 new outbreaks of low pathogenic avian influenza H5N2 in birds in farms, Pingtung County (OIE, July 26, 2018)

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Low pathogenic avian influenza (poultry), Chinese Taipei

Information received on 26/07/2018 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. 7 Date of start of the event 12/01/2015 Date of confirmation of the event 14/01/2015 Report date 26/07/2018 Date submitted to OIE 26/07/2018 Reason for notification Recurrence of a listed disease Date of previous occurrence 2014 Manifestation of disease Clinical disease Causal agent Low 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 (22/04/2015) Follow-up report No. 1 (12/05/2015) Follow-up report No. 2 (27/07/2015) Follow-up report No. 3 (23/11/2015) Follow-up report No. 4 (03/03/2016) Follow-up report No. 5 (01/05/2017) Follow-up report No. 6 (16/06/2017) Follow-up report No. 7 (26/07/2018)

New outbreaks (6)

Outbreak 1 (2018-pt-1) Yanpu Township, Pingtung County Date of start of the outbreak 04/01/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 13500 0 0 Affected population Native chickens(2018-pt-1)

Outbreak 2 (2018-pt-3) Yanpu Township, Pingtung County Date of start of the outbreak 29/01/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 43000 0 0 Affected population Layer hens(2018-pt-3)

Outbreak 3 (2018-pt-2) Changzhi Township, Pingtung County Date of start of the outbreak 30/01/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 24000 0 0 Affected population Native chickens(2018-pt-2)

Outbreak 4 (2018-pt-4) Yanpu Township, Pingtung County Date of start of the outbreak 02/03/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 70000 0 0 Affected population Layer hens (2018-pt-4)

Outbreak 5 (2018-pt-5) Yanpu Township, Pingtung County Date of start of the outbreak 14/03/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 5700 0 0 Affected population Native chickens (2018-pt-5)

Outbreak 6 (2018-pt-6) Jiuru Township, Pingtung County Date of start of the outbreak 19/03/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 3000 0 0 Affected population Native chickens (2018-pt-6)

Summary of outbreaks Total outbreaks: 6 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 159200 ** 0 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds ** 0.00% ** ** *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 When we performed active surveillance program, the samples collected from 6 poultry farms in Pingtung County. Samples were sent to the national Laboratory, the Animal Health Research Institute (AHRI) for diagnosis. H5N2 subtype low pathogenic avian influenza (LPAI) was confirmed by AHRI. These farms were put under movement restrictions. The pathogenicity of the virus was subsequently confirmed by the AHRI as low pathogenic (less than 75% mortality of the tested chickens) on 9 July 2018. Surrounding poultry farms within 3 km radius of the infected farms were under intensified surveillance for 3 months.

Control measures Measures applied Movement control inside the country Screening Quarantine Zoning Vaccination prohibited No treatment of affected animals Measures to be applied No other measures

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http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=27267