Highly pathogenic avian influenza,
Chinese Taipei
Information received on 02/05/2014 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 15/04/2014
Date of confirmation of the event 23/04/2014
Report date 02/05/2014
Date submitted to OIE 02/05/2014
Date event resolved 23/07/2014
Reason for notification Recurrence of a listed disease
Date of previous occurrence 28/03/2013
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N2
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (02/05/2014)
Follow-up report No. 1 (01/08/2014)
New outbreaks (1)
Outbreak 1 Wanhua District, Taipei City
Date of start of the outbreak 15/04/2014
Outbreak status Resolved (23/07/2014)
Epidemiological unit Not applicable
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 2 2 0 0
Affected population Native chickens
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 2 2 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds ** ** 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 An intensive active surveillance was conducted on a wholesale poultry market in Taipei City since April 2014. One hundred serums, 100 fecal swabs and 6 dead chickens were collected for serological and virological tests. The H5N2 subtype of avian influenza virus was isolated in one dead native chicken body sample on 23 April 2014, but it was not in the other samples. By tracing back on 23 April 2014, the original chicken farm in Yunlin County had no chicken remained, but movement control was immediately conducted on the farm. The pathogenicity of the virus was confirmed by the national laboratory as highly pathogenic (>75% mortality of tested chickens) on 2 May 2014. Samples were taken from 8 poultry farms in a 1-km radius around the original farm and confirmed all negative by virus isolation. After thorough cleaning and disinfection of this index farm, sentinel poultry test will be implemented to affirm non-viral activity in the environment. The transaction activities at the wholesale poultry market were stopped for one day to conduct thorough cleaning and disinfection. There were no poultry farms located within the 3-km radius area around the market.
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 (National laboratory) Birds gene sequencing 25/04/2014 Positive
Animal Health Research (National laboratory) Birds inoculation test 02/05/2014 Positive
Animal Health Research (National laboratory) Birds virus isolation 23/04/2014 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations