Highly pathogenic avian influenza,
Chinese Taipei
Information received on 23/04/2020 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 Follow-up report No. 13
Date of start of the event 09/09/2019
Date of confirmation of the event 13/09/2019
Report date 21/04/2020
Date submitted to OIE 23/04/2020
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)
New outbreaks (4)
Outbreak 1 (2020-tn-4) Xuejia District, Tainan City
Date of start of the outbreak 06/04/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 996 344 344 652 0
Affected population Turkeys(2020-tn-4)
Outbreak 2 (2020-tn-5) Xuejia District, Tainan City
Date of start of the outbreak 06/04/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 878 155 155 723 0
Affected population Turkeys(2020-tn-5)
Outbreak 3 (2020-yl-7) Dongshi Township, Yunlin County
Date of start of the outbreak 09/04/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 2028 371 371 1657 0
Affected population Turkeys(2020-yl-7)
Outbreak 4 (2020-tn-6) Yanshui District, Tainan City
Date of start of the outbreak 13/04/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 9699 1075 1075 8624 0
Affected population Layer Hens(2020-tn-6)
Summary of outbreaks Total outbreaks: 4
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 13601 1945 1945 11656 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 14.30% 14.30% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments Samples from Tainan City and Yunlin County were sent to the National Laboratory, Animal Health Research Institute (AHRI) for diagnosis. Highly pathogenic avian influenza H5N5 subtype was confirmed by AHRI. The infected farms have been placed under movement restriction. All animals on the infected farms have been culled. Thorough cleaning and disinfection have been conducted after stamping out operation. Surrounding poultry farms within 3 km 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
  • 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 28/03/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 09/04/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 12/04/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 16/04/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 27/03/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 08/04/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 11/04/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 15/04/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations