Highly pathogenic avian influenza, Hong Kong (P.R. China) (OIE, WAHID Interface, 4/8/10, edited)

[Giuseppe]

Highly pathogenic avian influenza, Hong Kong (P.R. China) (OIE, WAHID Interface, 4/8/10, edited)

[Source: OIE, Full PDF Document: (LINK). Edited.]

Highly pathogenic avian influenza, Hong Kong (P.R. China)

Information received on 08/04/2010 from Dr Thomas Sit, Assistant Director , Inspection & Quarantine, Agriculture, Fisheries and Conservation Department, Cheung Sha Wan , Hon Kong , Hong Kong (P.R. China)

• Summary
  • Report type Immediate notification (Final report)
  • Start date 26/03/2010
  • Date of first confirmation of the event 29/03/2010
  • Report date 07/04/2010
  • Date submitted to OIE 08/04/2010
  • Date event resolved 26/03/2010
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 29/12/2009
  • 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
      • Location(s) - HONG KONG (Mai Po San Tsuen, Yuen Long)
        • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • Wild species - ... - 1 - 1 - 0 - 0
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Wild species - ** - ** - 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, pet bird shops and wild birds in Hong Kong.
  • This H5N1 infected wild bird was detected in the frame of the ongoing surveillance programme on wild birds. No spread of disease was evident.
  • As a precautionary measure, the Mai Po Nature Reserve has been temporarily closed to visitors for 21 days starting from 31 March 2010.
  • As this was a wild bird case, the date the event ended is the same as the date the bird was found (26 March 2010).

• 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 and Conservation Department (National laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Wild species - immunohistochemical test - 29/03/2010 - Positive
      • Wild species - polymerase chain reaction (PCR) - 29/03/2010 - Positive
      • Wild species - virus isolation - 01/04/2010 - Positive
  • Laboratory name and type Department of Microbiology, University of Hong Kong (Regional Reference Laboratory)
    • Tests and results: Species - Test - Test date - Result
      • Wild species - gene sequencing - Pending

• Future Reporting
  • The event is resolved. No more reports will be submitted.

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