Highly pathogenic avian influenza H5N1, Hong Kong (SAR - PRC) (OIE, January 2013, edited): A black-headed gull

[Giuseppe]

[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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