Low pathogenic avian influenza (poultry),
China (People's Rep. of)
Information received on 22/04/2013 from Dr Zhang Zhongqui, Director General , China Animal Disease Control Centre, Veterinary Bureau, Ministry of Agriculture, Beijing, China (People's Rep. of)
Report type Follow-up report No. 4
Date of start of the event 04/04/2013
Date of confirmation of the event 04/04/2013
Report date 22/04/2013
Date submitted to OIE 22/04/2013
Date event resolved 30/06/2015
Reason for notification New strain of a listed disease
Manifestation of disease Sub-clinical infection
Causal agent Low pathogenic avian influenza virus
Serotype H7N9
Nature of diagnosis Laboratory (basic), Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (04/04/2013)
Follow-up report No. 1 (05/04/2013)
Follow-up report No. 2 (10/04/2013)
Follow-up report No. 3 (16/04/2013)
Follow-up report No. 4 (22/04/2013)
Follow-up report No. 5 (24/04/2013)
Follow-up report No. 6 (26/04/2013)
Follow-up report No. 7 (05/05/2013)
Follow-up report No. 8 (09/05/2013)
Follow-up report No. 9 (21/05/2013)
Follow-up report No. 10 (16/01/2014)
Follow-up report No. 11 (26/01/2014)
Follow-up report No. 12 (11/02/2014)
Follow-up report No. 13 (28/02/2014)
Follow-up report No. 14 (07/03/2014)
Follow-up report No. 15 (21/03/2014)
Follow-up report No. 16 (06/05/2014)
Follow-up report No. 17 (09/07/2014)
Follow-up report No. 18 (31/08/2015)
New outbreaks (1)
Outbreak 1 Haian, Nantong, Jiangsu
Date of start of the outbreak 04/04/2013
Outbreak status Resolved (30/06/2015)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 340 1 0 340 0
Affected population One sample from pigeon
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 340 1 0 340 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.29% 0.00% 0.00% 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
Epidemiological comments Gene sequencing shows that it is low pathogenic avian influenza virus (LPAI).
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Disinfection / Disinfestation
  • Dipping / Spraying for control of vectors or parasites
  • Quarantine
  • Stamping out
  • Control of wildlife reservoirs
  • Zoning
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations