Highly pathogenic avian influenza,
Chinese Taipei
Information received on 12/02/2017 from Dr Tai-Hwa Shih, Chief Veterinary Officer, Deputy Director General, Bureau of Animal and Plant Health Inspection and Quarantine Council of Agriculture Executive Yuan, Ministry of Agriculture, Taipei, Chinese Taipei
Summary
Report type Immediate notification
Date of start of the event 02/02/2017
Date of confirmation of the event 05/02/2017
Report date 12/02/2017
Date submitted to OIE 12/02/2017
Date event resolved 05/05/2017
Reason for notification New strain of a listed disease in the country
Causal agent Highly pathogenic avian influenza virus
Serotype H5N6
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (12/02/2017)
Follow-up report No. 1 (01/03/2017)
Follow-up report No. 2 (07/03/2017)
Follow-up report No. 3 (17/03/2017)
Follow-up report No. 4 (24/07/2017)
New outbreaks (2)
Outbreak 1 Yuli Township, HUALIEN COUNTY
Date of start of the outbreak 02/02/2017
Outbreak status Resolved (05/05/2017)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 1 1 0 0
Affected population Duck (2017-hl-1)
Outbreak 2 Yuli Township, HUALIEN COUNTY
Date of start of the outbreak 02/02/2017
Outbreak status Resolved (17/02/2017)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 3787 0 3787 0
Affected population Duck(2017-hl-2), H5N2 HPAI virus was also detected.
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 3787 1 ** 1 3787 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds ** ** ** **
*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 The animal health authority, BAPHIQ, entrusts the Wild Bird Society of Taipei (a non-governmental organization) to conduct active surveillance of wild bird for avian influenza. One dead young duck was found on a country road in Hualien County by the Wild Bird Society of Taipei and was sent to the National Laboratory (Animal Health Research Institute, AHRI) on 2 February 2017. H5N6 subtype HPAI was detected and confirmed by the AHRI in the evening of 5 February 2017. The HA and NA genomic sequences of the virus seem to share high similarity (99%) with those of the virus which has caused major outbreaks in Korea and Japan according to preliminary analysis by the AHRI. The Local Disease Control Center (LDCC) disinfected the neighboring areas of the spot where the dead duck was found and has completed clinical examination and sampling of all poultry farms (2 duck farms) within 1 km radius of the spot. All ducks in the 2 farms are clinically healthy. Surrounding poultry farms within 3 km radius of the index spot will also be sampled as soon as possible and they are under intensified surveillance for 3 months to detect, if any, spreading of the virus. Until 21 February 2017, all waterfowls of Hualien County must be slaughtered locally, no dispatch to other regions of the country is allowed. On 7 February 2017, a batch of ducks (3,787 heads) originating from one of the farms under intensified surveillance in Hualien County was intercepted in an abattoir located in Yilan County. The duck farm is under intensified surveillance because it is within the 3 km radius of one dead young duck positive for H5N6 that was reported on 6 February 2017. The ducks were transported to Yilan County on 6 February, one day ahead of the entry into force of the ban on the dispatch of waterfowls of Hualien County to other regions of the country. The carcasses of the ducks intercepted in the abattoir were sampled and tested using RT-PCR and gene sequence analysis by the National Laboratory (Animal Health Research Institute, AHRI). H5N6 and H5N2 subtypes HPAI were detected and confirmed by the AHRI on 11 February 2017. All of the 3,787 carcasses were condemned and destroyed, and thorough cleaning and disinfection have been conducted in the abattoir. The farm of origin has been sampled for testing. The intensified surveillance zone has been enlarged to 5 km radius surrounding the index farm. Sampling is underway and will be completed as soon as possible in order to detect any spreading of the viruses. These control measures will be imposed on the area for at least 3 months and will be lifted only after the confirmation of the elimination of the viruses.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Disinfection
  • Quarantine
  • Stamping out
  • Zoning
  • 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 05/02/2017 Positive
Animal Health Research Institute (National laboratory) Birds gene sequencing 11/02/2017 Positive
Animal Health Research Institute (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 05/02/2017 Positive
Animal Health Research Institute (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 10/02/2017 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations