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2022-10-7 4:38:17


OIE: Highly pathogenic avian influenza, China (People´s Rep. of)
submited by kickingbird at Jun, 4, 2017 19:13 PM from OIE

Information received on 02/06/2017 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 Follow-up report No. 3
Date of start of the event 19/03/2017
Date of confirmation of the event 24/03/2017
Report date 01/06/2017
Date submitted to OIE 02/06/2017
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)
New outbreaks (1)
Outbreak 1 Yulin City, Yuyang District, SHAANXI
Date of start of the outbreak 23/05/2017
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 45000 31700 22000 23000
Affected population The outbreak 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 45000 31700 22000 23000
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 70.44% 48.89% 69.40% **
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Quarantine
  • Official disposal of carcasses, by-products and waste
  • Stamping out
  • Disinfection
  • 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 Laboratory for Avian Influenza (OIE Reference Laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 31/05/2017 Positive
Harbin National Reference Laboratory for Avian Influenza (OIE Reference Laboratory) Birds virus sequencing 01/06/2017 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.

 

Fulltext of investigation report in Chinese can be downloaded at: http://www.flu.org.cn/scn/article_detail.asp?articleId=12406

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