Low pathogenic avian influenza (poultry) H7N9, China (People's Rep. of) (OIE, February 28 2014): More LBMs samples positive, Hunan

[Giuseppe]

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


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


Information received on 28/02/2014 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. 13
  • Date of start of the event 04/04/2013
  • Date of pre-confirmation of the event 04/04/2013
  • Report date 28/02/2014
  • Date submitted to OIE 28/02/2014
  • 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)
  
  
• New outbreaks (2)
  • Outbreak 1 - Gelin new city livebird market, changsha, HUNAN
    • Date of start of the outbreak 15/02/2014
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Not applicable
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 138 ? 1 ? 0 ? 138 ? 0
      • Affected population:
        • 40 samples were collected from the live bird market (including 13 chicken samples, 12 duck samples and 15 environment samples) according to the national surveillance plan and no clinical signs were found.
        • One chicken sample tested positive.
    
    
  • Outbreak 2 - Chengbei livebird market, shuangfeng, loudi, HUNAN
    • Date of start of the outbreak 15/02/2014
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Not applicable
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 22 ? 1 ? 0 ? 22 ? 0
      • Affected population:
        • 45 chicken samples were collected from the live bird market according to the national surveillance plan and no clinical signs were found.
        • One chicken sample was tested positive.
  
  
• Summary of outbreaks
  • Total outbreaks: 2
    • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 160 ? 2 ? 0 ? 160 ? 0
      
      
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds - 1.25% - 0.00% - 0.00% - 100.00%
      • *Removed from the susceptible population through death, destruction and/or slaughter
  
  
• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Unknown or inconclusive
  
  
• Control measures
  • Measures applied
    • Stamping out
    • Movement control inside the country
    • Disinfection of infected premises/establishment(s)
    • Dipping / Spraying
    • No vaccination
    • 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 veterinary research institute, Chinese academy of agricultural sciences (OIE?s Reference Laboratory) - Birds - real-time PCR - 18/02/2014 ? Positive
    • Harbin veterinary research institute, Chinese academy of agricultural sciences (OIE?s Reference Laboratory) - Birds - virus isolation - 18/02/2014 ? Positive
  
  
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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