Taiwan - 1 new outbreak of highly pathogenic avian influenza H5N5 on duck farm in Kaohsiung City (OIE, September 23, 2019)

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Highly pathogenic avian influenza, Chinese Taipei

Information received on 23/09/2019 from Dr Wen-Jane Tu, Chief Veterinary Officer, Deputy Director General, Bureau of Animal and Plant Health Inspection and Quarantine, Council of Agriculture, Executive Yuan, Taipei, Chinese Taipei

Summary Report type Immediate notification Date of start of the event 09/09/2019 Date of confirmation of the event 13/09/2019 Report date 23/09/2019 Date submitted to OIE 23/09/2019 Reason for notification New strain of a listed disease in the country Causal agent Highly pathogenic avian influenza virus Serotype H5N5 Nature of diagnosis Laboratory (advanced) This event pertains to a defined zone within the country

New outbreaks (1)

Outbreak 1 (2019-kh-1) Qishan District, Kaohsiung City Date of start of the outbreak 09/09/2019 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 3583 0 3583 0 Affected population Meat Ducks(2019-kh-1)

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 3583 ** 0 3583 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds ** 0.00% ** 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 During active surveillance program, samples collected on 9 September 2019 from one duck farm in Kaohsiung City were sent to the National Laboratory, Animal Health Research Institute (AHRI) for analysis. Highly pathogenic avian influenza H5N5 subtype was confirmed by AHRI on 13 September 2019. The farm has been placed under movement restriction. All animals in this infected farm have been culled. Thorough cleaning and disinfection have been conducted after stamping out operation. Surrounding poultry farms (2 duck farms, 2 native chicken farms and 1 layer chicken farm) within a three-kilometer radius of the infected farm are clinically healthy and test results of HPAI are all negative, and they are under intensified surveillance for 3 months to detect, if any, spreading of the virus. Chinese Taipei therefore considers that HPAI H5N5 subtype virus has not been spread.

Control measures Measures applied Movement control inside the country Surveillance outside containment and/or protection zone Surveillance within containment and/or protection zone Traceability Quarantine Zoning Disinfection 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 13/09/2019 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 12/09/2019 Positive

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

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https://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=31862