OIE: Highly pathogenic avian influenza, China (People´s Rep. of)

Information received on 12/12/2011 from Dr Zhang Zhongqiu, Director General , China Animal Disease Control Centre, Veterinary Bureau, Ministry of Agriculture, Beijing, China (People´s Rep. of)

Summary

Report type Immediate notification
Start date 02/12/2011
Date of first confirmation of the event 12/12/2011
Report date 12/12/2011
Date submitted to OIE 12/12/2011
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 25/05/2010
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H5N1
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country

New outbreaks

Summary of outbreaks Total outbreaks: 1
Location(s)
  • TIBET (Sangda, Duilongdeqing, Lhasa)
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 1865 290 290 1575 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 15.55% 15.55% 100.00% 100.00%

* Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology

Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive

Control measures

Measures applied
  • Stamping out
  • Quarantine
  • Movement control inside the country
  • Screening
  • Zoning
  • Vaccination in response to the outbreak (s)
  • Disinfection of infected premises/establishment(s)
  • Dipping / Spraying
  • No treatment of affected animals
Measures to be applied
  • No other measures

Diagnostic test results

Laboratory name and type Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (national reference laboratory for avian influenza) (OIE抯 Reference Laboratory)
Tests and results
Species Test Test date Result
Birds haemagglutination inhibition test (HIT) 12/12/2011 Positive
Birds intravenous pathogenicity index (IVPI) test 12/12/2011 Positive
Birds reverse transcription - polymerase chain reaction (RT-PCR) 12/12/2011 Positive

Future Reporting

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