Report type Follow-up report No. 87
Date of start of the event 07/01/2015
Date of confirmation of the event 11/01/2015
Report date 29/01/2018
Date submitted to OIE 01/02/2018
Reason for notification Recurrence of a listed disease
Date of previous occurrence 23/07/2014
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N2
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country


New outbreaks (4)



Outbreak 1 (2018-tp-2) Wanhua District, TAIPEI CITY
Date of start of the outbreak 14/01/2018
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Slaughterhouse
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 47 0 47 0

Affected population Native chickens in abattoir (2018-tp-2)



Outbreak 2 (2018-yl-5) Mailiao Township, YUNLIN COUNTY
Date of start of the outbreak 17/01/2018
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 3979 0 3979 0

Affected population Meat Ducks (2018-yl-5)



Outbreak 3 (2018-pt-5) Yanpu Township, PINGTUNG COUNTY
Date of start of the outbreak 19/01/2018
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 11796 1100 1100 10696 0

Affected population Native chickens (2018-pt-5)



Outbreak 4 (2018-ntp-1) Taishan District, NEW TAIPEI CITY
Date of start of the outbreak 26/01/2018
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Slaughterhouse
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 9 0 9 0

Affected population Native chickens in abattoir (2018-ntp-1)



Summary of outbreaks Total outbreaks: 4
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 15831 1100 ** 1100 14731 0

Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds ** 6.95% ** 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 Samples from Pintung County and Yunlin County were sent to the National Laboratory, Animal Health Research Institute (AHRI) for diagnosis. Highly pathogenic avian influenza H5N2 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. Suspected signs were observed in poultry carcasses during post-mortem inspection in one abattoir in Taipei City and one in New Taipei City respectively. Samples were sent to the AHRI for diagnosis. H5N2 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 farms of origin, any positive results will be included in follow-up reports.



Control measures

Measures applied Movement control inside the country
Disinfection / Disinfestation
Screening
Traceability
Quarantine
Surveillance outside containment and/or protection zone
Official destruction of animal products
Official disposal of carcasses, by-products and waste
Stamping out
Surveillance within containment and/or protection zone
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 (National laboratory) Birds gene sequencing 16/01/2018 Positive
Animal Health Research Institute (National laboratory) Birds gene sequencing 22/01/2018 Positive
Animal Health Research Institute (National laboratory) Birds gene sequencing 26/01/2018 Positive
Animal Health Research Institute (National laboratory) Birds gene sequencing 28/01/2018 Positive
Animal Health Research Institute (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 15/01/2018 Positive
Animal Health Research Institute (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 21/01/2018 Positive
Animal Health Research Institute (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 27/01/2018 Positive


Future Reporting

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