Highly pathogenic avian influenza,
Chinese Taipei
Information received on 24/08/2020 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 Immediate notification
Date of start of the event 08/08/2020
Date of confirmation of the event 12/08/2020
Report date 24/08/2020
Date submitted to OIE 24/08/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 17/03/2020
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N2
Nature of diagnosis Laboratory (advanced)
This event pertains to the whole country
New outbreaks (1)
Outbreak 1 (2020-yl-15) Dounan Township, Yunlin County
Date of start of the outbreak 08/08/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 14800 806 806 13994 0
Affected population Native chickens(2020-yl-15)
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 14800 806 806 13994 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 5.45% 5.45% 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 The owner of chicken farm in Yunlin County reported to the Local Animal Disease Inspection Authority (LADIA) that chickens have abnormal mortality on 08 August 2020. H5N2 subtype HPAI was detected and confirmed by the Animal Health Research Institute (AHRI) on 12 August 2020. All animals on the infected farm have been culled. Thorough cleaning and disinfection have been conducted after stamping out operation. To prevent the outbreak of new HPAI case from spreading, surrounding poultry farms within a three-kilometer radius of the infected farm are under intensified surveillance. The LADIA also will conduct clinical investigation and sample all the 87 poultry farms within 3km radius of the infected farm.
Control measures
Measures applied
  • Disinfection
  • Zoning
  • Stamping out
  • Quarantine
  • Traceability
  • Surveillance within containment and/or protection zone
  • Surveillance outside containment and/or protection zone
  • Movement control inside the country
  • 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 12/08/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 11/08/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations