Highly pathogenic avian influenza,
Chinese Taipei
Information received on 21/02/2020 from Dr Wen-Jane Tu, Chief Veterinary Officer, Director General, Bureau of Animal and Plant Health Inspection and Quarantine, Council of Agriculture, Executive Yuan, Taipei, Chinese Taipei
Report type Follow-up report No. 8
Date of start of the event 09/09/2019
Date of confirmation of the event 13/09/2019
Report date 20/02/2020
Date submitted to OIE 21/02/2020
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
Related reports Immediate notification (23/09/2019)
Follow-up report No. 1 (14/10/2019)
Follow-up report No. 2 (22/11/2019)
Follow-up report No. 3 (03/01/2020)
Follow-up report No. 4 (06/01/2020)
Follow-up report No. 5 (13/01/2020)
Follow-up report No. 6 (22/01/2020)
Follow-up report No. 7 (10/02/2020)
Follow-up report No. 8 (20/02/2020)
Follow-up report No. 9 (03/03/2020)
Follow-up report No. 10 (10/03/2020)
Follow-up report No. 11 (27/03/2020)
Follow-up report No. 12 (07/04/2020)
Follow-up report No. 13 (21/04/2020)
Follow-up report No. 14 (11/05/2020)
Follow-up report No. 15 (18/05/2020)
Follow-up report No. 16 (01/06/2020)
Follow-up report No. 17 (30/06/2020)
Follow-up report No. 18 (10/08/2020)
Follow-up report No. 19 (17/08/2020)
Follow-up report No. 20 (21/08/2020)
Follow-up report No. 21 (31/08/2020)
Follow-up report No. 22 (07/09/2020)
Follow-up report No. 23 (21/09/2020)
Follow-up report No. 24 (29/09/2020)
Follow-up report No. 25 (15/12/2020)
Follow-up report No. 26 (04/01/2021)
Follow-up report No. 27 (13/01/2021)
New outbreaks (1)
Outbreak 1 (2020-yl-1) Kouhu Township, Yunlin County
Date of start of the outbreak 13/02/2020
Outbreak status Resolved (16/03/2020)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 33644 1190 1190 32454 0
Affected population Native Chickens(2020-yl-1) (H5N5 & H5N2)
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 33644 1190 1190 32454 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 3.54% 3.54% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments Samples from Yunlin County were sent to the National Laboratory, Animal Health Research Institute (AHRI) for diagnosis. Highly pathogenic avian influenza H5N5 and H5N2 subtype was confirmed by AHRI. The infected farm has been placed under movement restriction. All animals on the infected farm have been culled. Thorough cleaning and disinfection have been conducted after stamping out operation. The infected farm in Yunlin County was cleaned and disinfected. Surrounding poultry farms within 3 km radius of the infected farm 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
  • Traceability
  • Quarantine
  • Stamping out
  • 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 16/02/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 15/02/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations