Taiwan - 4 new outbreaks of highly pathogenic avian influenza H5 in birds in farms, January to June, Pingtung, Yunlin (OIE, August 13, 2018)

[Pathfinder]

Highly pathogenic avian influenza, Chinese Taipei

Information received on 13/08/2018 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 Immediate notification Date of start of the event 12/01/2018 Date of confirmation of the event 17/01/2018 Report date 13/08/2018 Date submitted to OIE 13/08/2018 Reason for notification Recurrence of a listed disease Date of previous occurrence 2018 Manifestation of disease Clinical disease Causal agent Highly pathogenic avian influenza virus Serotype H5 Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced) This event pertains to a defined zone within the country

New outbreaks (4)

Outbreak 1 (PT-1-2018) Jiadong Township, Pingtung County Date of start of the outbreak 12/01/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 15463 0 15463 0 Affected population Layer chickens(PT-1-2018)

Outbreak 2 (YL-1-2018) Huwei Township, Yunlin County Date of start of the outbreak 31/01/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 9530 0 9530 0 Affected population Layer chickens(YL-1-2018)

Outbreak 3 (YL-2-2018) Xiluo Township, Yunlin County Date of start of the outbreak 17/04/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 25887 230 230 25657 0 Affected population Chickens(YL-2-2018)

Outbreak 4 (YL-3-2018) Citong Township, Yunlin County Date of start of the outbreak 26/06/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 9711 0 9711 0 Affected population Ducks(YL-3-2018)

Summary of outbreaks Total outbreaks: 4 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 60591 230 ** 230 60361 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds ** 0.38% ** 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 One layer farm in Pingtung County, one layer farm and one duck farm in Yunlin County were sampled by the local Livestock Disease Control Centre (LDCC) in the process of intensified surveillance around infected holdings. Another chicken farm in Yunlin County was reported by the owner and was sampled by the LDCC. These samples had been sent to the National Laboratory, Animal Health Research Institute (AHRI) for analysis. Highly pathogenic avian influenza H5 subtype was confirmed by AHRI on 17 January, 10 February, 8 July and 20 April in 2018. These farms have been placed under movement restriction. All animals in these infected farms have been culled. Thorough cleaning and disinfection have been conducted after stamping out operation. Surrounding poultry farms within a three-kilometer radius of the infected farms are under intensified surveillance for three months.

Control measures Measures applied Movement control inside the country Surveillance outside containment and/or protection zone Surveillance within containment and/or protection zone Quarantine Official disposal of carcasses, by-products and waste Stamping out Disinfection Ante and post-mortem inspections 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 (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 17/01/2018 Positive Animal Health Research Institute (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 10/02/2018 Positive Animal Health Research Institute (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 20/04/2018 Positive Animal Health Research Institute (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 08/07/2018 Positive

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

...

http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=27509