Low pathogenic avian influenza (poultry) H7N9, Hong Kong (SAR - PRC) (OIE, January 29 2014)

[Giuseppe]

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


Low pathogenic avian influenza (poultry) H7N9, Hong Kong (SAR - PRC)


Information received on 28/01/2014 from Dr Thomas Sit, Chief Veterinary Officer / Assistant Director (Inspection & Quarantine), Agriculture, Fisheries and Conservation Department, Hong Kong Special Administrative Region Government, Hong Kong , Hong Kong (SAR - PRC)

• Summary
  • Report type Immediate notification
  • Date of start of the event 27/01/2014
  • Date of pre-confirmation of the event 27/01/2014
  • Report date 28/01/2014
  • Date submitted to OIE 29/01/2014
  • Reason for notification First occurrence of a listed disease
  • Manifestation of disease Sub-clinical infection
  • Causal agent Low pathogenic avian influenza virus
  • Serotype H7N9
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to the whole country
• New outbreaks
  • Summary of outbreaks
    • Total outbreaks: 1
      • Outbreak Location - HONG KONG ( 4 Hing Wah Street, Cheung Sha Wan )
      • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
        • Birds - 22604 - 2600 - 0 - 22604 - 0
      • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
        • Birds - 11.50% - 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
    • Legal movement of animals
• Epidemiological comments
  • An intensive surveillance system is in place for all import poultry, wild bird, local poultry farms, poultry markets and pet bird shops.
  • An imported consignment containing 2,600 silky chickens was tested positive for low pathogenic avian influenza virus (H7N9) in the routine surveillance programme.
  • A total of 22,604 poultry, including 16,984 chickens, 2,898 silky fowls, 1,080 pheasants and 1,642 pigeons were culled on 28 January 2014.
  • Importation of live poultry and movement of poultry in local farms are banned for 21 days.
• Control measures
  • Measures applied
    • Stamping out
    • Quarantine
    • Movement control inside the country
    • Screening
    • Zoning
    • Disinfection of infected premises/establishment(s)
    • No vaccination
    • No treatment of affected animals
  • Measures to be applied
    • No other measures
• Diagnostic test results
  • Laboratory name and type - Tai Lung Veterinary Laboratory, Agriculture, Fisheries and Conservation Department ( National laboratory )
    • Tests and results: Species - Test - Test date - Result
      • Birds - polymerase chain reaction (PCR) - 27/01/2014 - Positive
      • Birds - virus isolation - Pending
  • Laboratory name and type - Centre of Influenza Research, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong ( Regional Reference Laboratory )
    • Tests and results: Species - Test - Test date - Result
      • Birds - gene sequencing - Pending
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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