Highly pathogenic avian influenza,
China (People's Rep. of)
Information received on 24/03/2017 from Dr Zhang Zhongqui, Director General , China Animal Disease Control Centre, Veterinary Bureau, Ministry of Agriculture, Beijing, China (People's Rep. of)
Report type Immediate notification
Date of start of the event 19/03/2017
Date of confirmation of the event 24/03/2017
Report date 24/03/2017
Date submitted to OIE 24/03/2017
Date event resolved 25/08/2017
Reason for notification New strain of a listed disease
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H7N9
Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (24/03/2017)
Follow-up report No. 1 (12/05/2017)
Follow-up report No. 2 (24/05/2017)
Follow-up report No. 3 (01/06/2017)
Follow-up report No. 4 (12/06/2017)
Follow-up report No. 5 (13/06/2017)
Follow-up report No. 6 (23/06/2017)
Follow-up report No. 7 (10/01/2018)
New outbreaks (1)
Outbreak 1 Yongzhou, Dongan, Hunan
Date of start of the outbreak 19/03/2017
Outbreak status Resolved (25/08/2017)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 189676 29760 18497 171179 0
Affected population The event was observed in local layer farm by active surveillance.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 189676 29760 18497 171179 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 15.69% 9.75% 62.15% 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
  • Movement control inside the country
  • Screening
  • Disinfection
  • Stamping out
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Harbin National Reference Lab for Avian Influenza (OIE Reference Laboratory) Birds virus sequencing 24/03/2017 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations