Highly pathogenic avian influenza H5N2, Chinese Taipei
Information received on 02/05/2014 from Dr Ping-Cheng Yang, Director, Animal Technology Institute Ta?wan, Council of Agriculture, Ta?wan, Chinese Taipei
- Summary
- Report type Immediate notification
- Date of start of the event 15/04/2014
- Date of pre-confirmation of the event 23/04/2014
- Report date 02/05/2014
- Date submitted to OIE 02/05/2014
- Reason for notification Reoccurrence of a listed disease
- Date of previous occurrence 28/03/2013
- Manifestation of disease Sub-clinical infection
- Causal agent Highly pathogenic avian influenza virus
- Serotype H5N2
- Nature of diagnosis Laboratory (advanced)
- This event pertains to a defined zone within the country
- New outbreaks (1)
- Outbreak 1 - Wanhua District, TAIPEI CITY
- Date of start of the outbreak 15/04/2014
- Outbreak status Continuing (or date resolved not provided)
- Epidemiological unit Not applicable
- Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
- Birds ? ? ? 2 ? 2 ? 0 ? 0
- Affected population Native chickens
- Outbreak 1 - Wanhua District, TAIPEI CITY
- Summary of outbreaks
- Total outbreaks: 1
- Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? 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
- Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
- Total outbreaks: 1
- Epidemiology
- Source of the outbreak(s) or origin of infection
- Unknown or inconclusive
- Source of the outbreak(s) or origin of infection
- 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
- Quarantine
- Movement control inside the country
- Screening
- Zoning
- Disinfection of infected premises/establishment(s)
- Vaccination prohibited
- No treatment of affected animals
- Measures to be applied
- No other measures
- Measures applied
- 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
- Laboratory name and type ? Species ? Test - Test date ? Result
- Future Reporting
- The event is continuing. Weekly follow-up reports will be submitted.
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