1/29/2013

Highly pathogenic avian influenza H5N1, Hong Kong (SAR - PRC) (OIE, WAHID Interface, January 29 2013, edited)

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

Highly pathogenic avian influenza H5N1, Hong Kong (SAR - PRC)

Information received on 29/01/2013 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 (Final report)
    • Date of start of the event 25/01/2013
    • Date of pre-confirmation of the event 29/01/2013
    • Report date 29/01/2013
    • Date submitted to OIE 29/01/2013
    • Date event resolved 29/01/2013
    • Reason for notification Reoccurrence of a listed disease
    • Date of previous occurrence 26/07/2012
    • Manifestation of disease Clinical disease
    • Causal agent Highly pathogenic avian influenza virus
    • Serotype H5N1
    • Nature of diagnosis Laboratory (advanced)
    • This event pertains to the whole country
  • New outbreaks
    • Summary of outbreaks
      • Total outbreaks: 1
        • Outbreak Location  - HONG KONG ( Mouse Island children’s playground, Hoi Wing Road, Tuen Mun )
          • Total animals affected:  Species -  Susceptible -  Cases -  Deaths -  Destroyed -   Slaughtered
            • Black-headed Gull:Laridae (Larus ridibundus)  -  1 -  1 -  0 -  0
        • Outbreak statistics:  Species -  Apparent morbidity rate -  Apparent mortality rate -  Apparent case fatality rate -  Proportion susceptible animals lost*
          • Black-headed Gull:Laridae (Larus ridibundus) -  ** -  ** -  100.00% -   **
          • * 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
    • An intensive surveillance system is in place for all poultry farms, poultry markets and pet bird shops in Hong Kong.
    • The H5N1 infected wild bird was detected in our ongoing surveillance program on wild birds.
    • No spread of disease was evident.
    • The date of closure of the event is the date of end of the outbreak which is the date the bird was found (i.e. 25 January 2013).
  • Control measures
    • Measures applied
      • Screening
      • 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 & Conservation Department ( National laboratory )
      • Tests and results:  Species -  Test -  Test date  -  Result
        • Black-headed Gull -  immunohistochemical test  -  29/01/2013 -  Positive
        • Black-headed Gull -  polymerase chain reaction (PCR) -  29/01/2013 -  Positive
        • Black-headed Gull -  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
        • Black-headed Gull -  gene sequencing -    Pending
  • Future Reporting
    • The event is resolved. No more reports will be submitted.

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