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

Information received on 18/04/2012 from Dr Zhang Zhongqiu, Director General , China Animal Disease Control Centre, Veterinary Bureau, Ministry of Agriculture, Beijing, China (People´s Rep. of)


Report type Follow-up report No. 2
Start date 02/12/2011
Date of first confirmation of the event 12/12/2011
Report date 18/04/2012
Date submitted to OIE 18/04/2012
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
Related reports

New outbreaks

Outbreak 1 Yanglang village, Yuanzhou district, Guyuan, NINGXIA
Date of start of the outbreak 13/04/2012
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 95000 23880 10468 84532 0
Summary of outbreaks Total outbreaks: 1
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 25.14% 11.02% 43.84% 100.00%

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


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

Control measures

Measures applied
  • Stamping out
  • Quarantine
  • Movement control inside the country
  • Zoning
  • Disinfection of infected premises/establishment(s)
  • Dipping / Spraying
  • Vaccination prohibited
  • 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’s Reference Laboratory)
Tests and results
Species Test Test date Result
Birds haemagglutination inhibition test (HIT) 18/04/2012 Positive
Birds intravenous pathogenicity index (IVPI) test 18/04/2012 Positive
Birds reverse transcription - polymerase chain reaction (RT-PCR) 18/04/2012 Positive

Future Reporting

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