Low pathogenic avian influenza (poultry),
Chinese Taipei
Information received on 26/12/2014 from Dr Ping-Cheng Yang, President, Agriculture Technology Research Institute, Council of Agriculture, Hsinchu City, Chinese Taipei
Summary
Report type Immediate notification
Date of start of the event 17/12/2014
Date of confirmation of the event 26/12/2014
Report date 26/12/2014
Date submitted to OIE 26/12/2014
Date event resolved 21/03/2015
Reason for notification Recurrence of a listed disease
Date of previous occurrence 29/07/2014
Manifestation of disease Sub-clinical infection
Causal agent Low pathogenic avian influenza virus
Serotype H5
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (26/12/2014)
Follow-up report No. 1 (14/04/2015)
New outbreaks (1)
Outbreak 1 Jiaoxi Township, YILAN COUNTY
Date of start of the outbreak 17/12/2014
Outbreak status Resolved (21/03/2015)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 2600 20 0 0 0
Affected population duck breeder
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 2600 20 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.77% 0.00% 0.00% 0.00%
*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 H7N9 subtype LPAI was confirmed on 16 December 2014 from a wild bird faecal sample in a wetland in Yilan County by active surveillance program. The gene sequence of the H7N9 subtype LPAI is different from China’s strain. This wild bird case will be reported in OIE wildlife annual report specifically. Subsequently, a RNA product of H5 avian influenza virus (AIV) was detected in a duck breeder farm within 3 Km-radius of the aforementioned wetland by intensified active surveillance. The gene sequence analysis of the HA0 cleavage site of the H5 RNA demonstrated that the causal agent was of low pathogenicity. Movement restriction was implemented on the duck breeder farm. Clinical investigation on the affected farm showed that the ducks were in healthy condition without abnormal mortality and egg production. The clinical investigation and surveillance of surrounding poultry farms are ongoing.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Disinfection / Disinfestation
  • Quarantine
  • 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 26/12/2014 Positive
Animal Health Research Institute (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 26/12/2014 Positive
Animal Health Research Institute (National laboratory) Birds virus isolation 26/12/2014 Negative
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations