Low pathogenic avian influenza (poultry) H7N9, China (People's Rep. of) (OIE, May 21 2013): 1 chicken sample, Guangdong

[Giuseppe]

[Source: OIE, full page: (LINK). Edited.]


Low pathogenic avian influenza (poultry) H7N9, China (People's Rep. of)


Information received on 21/05/2013 from Dr Zhang Zhongqui, 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. 9
• Date of start of the event 04/04/2013
• Date of pre-confirmation of the event 04/04/2013
• Report date 21/05/2013
• Date submitted to OIE 21/05/2013
• 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)
• New outbreaks (1)
  • Outbreak 1 - Fuli market, Licheng, Zengcheng, GUANGDONG
    • Date of start of the outbreak 20/05/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Not applicable
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - ? ? 1 ? 0 ? 0 ? 0
      • Affected population One sample from a chicken
• Summary of outbreaks
  • Total outbreaks: 1
    • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - ? ? 1 ? 0 ? 0 ? 0
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds ? ** ? ** - 0.00% ? **
      • *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
• Epidemiological comments
  • Gene sequencing shows that it is low pathogenic avian influenza virus (LPAI). The intravenous pathogenicity index (IVPI) is 0.
• Control measures
  • Measures applied
    • Control of wildlife reservoirs
    • Quarantine
    • Movement control inside the country
    • Screening
    • Zoning
    • Disinfection of infected premises/establishment(s)
    • Dipping / Spraying
    • No vaccination
    • No treatment of affected animals
  • Measures to be applied
    • Stamping out
• Diagnostic test results
  • Laboratory name and type ? Species ? Test - Test date ? Result
    • Harbin veterinary research institute, Chinese academy of agricultural sciences (OIE?s Reference Laboratory) ? Birds - intravenous pathogenicity index (IVPI) test - 27/04/2013 ? Negative
    • Harbin veterinary research institute, Chinese academy of agricultural sciences (OIE?s Reference Laboratory) ? Birds - gene sequencing - 20/05/2013 ? Positive
    • Harbin veterinary research institute, Chinese academy of agricultural sciences (OIE?s Reference Laboratory) ? Birds - haemagglutination inhibition test (HIT) - 20/05/2013 ? Positive
    • Harbin veterinary research institute, Chinese academy of agricultural sciences (OIE?s Reference Laboratory) ? Birds - intravenous pathogenicity index (IVPI) test - 20/05/2013 ? Negative
    • Harbin veterinary research institute, Chinese academy of agricultural sciences (OIE?s Reference Laboratory) ? Birds - pathogen isolation by egg inoculation - 20/05/2013 ? Positive
    • Harbin veterinary research institute, Chinese academy of agricultural sciences (OIE?s Reference Laboratory) ? Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 20/05/2013 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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