Information received on 15/12/2020 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
Summary
Report type Follow-up report No. 25
Date of start of the event 09/09/2019
Date of confirmation of the event 13/09/2019
Report date 15/12/2020
Date submitted to OIE 15/12/2020
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)
New outbreaks (4)
Outbreak 1 (2020-ntpc-2) Taishan District, New Taipei City
Date of start of the outbreak 13/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Slaughterhouse
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 40 2 0 40 0
Affected population Native Chickens(2020-ntpc-2)
Outbreak 2 (2020-tp-7) Wanhua District, Taipei City
Date of start of the outbreak 14/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Slaughterhouse
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 11 1 0 11 0
Affected population Native Chickens(2020-tp-7)
Outbreak 3 (2020-cy-1) Taibao City, Chiayi City
Date of start of the outbreak 22/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 918 344 344 574 0
Affected population Geese for meat production (2020-cy-1)
Outbreak 4 (2020-yl-18) Yuanchang Township, Yunlin County
Date of start of the outbreak 23/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 1949 1106 1106 843 0
Affected population Geese for meat production (2020-yl-18)
Summary of outbreaks Total outbreaks: 4
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 2918 1453 1450 1468 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 49.79% 49.69% 99.79% 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 Chiayi County 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 in Chiayi County and Yunlin County 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 a 3 km radius of the infected farms are under intensified surveillance for three months. Suspected signs were observed in poultry carcasses during post-mortem inspection in the abattoirs in Taipei City and New Taipei City. Samples were sent to the AHRI for diagnosis. H5N5 subtype HPAI was confirmed by the AHRI. The carcasses were destroyed and thorough cleaning and disinfection have been conducted in the abattoirs. After tracing back to the farm of origin, any positive results will be included in follow-up reports.
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 16/11/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 24/11/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 26/11/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 15/11/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 23/11/2020 Positive
Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 25/11/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.