Highly pathogenic avian influenza, Hong Kong (SAR - PRC) (OIE, December 30 2011): No New H5N1 Poultry Outbreaks

[Giuseppe]

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


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


Information received on 30/12/2011 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 Follow-up report No. 1
  • Start date 17/12/2011
  • Date of first confirmation of the event 20/12/2011
  • Report date 30/12/2011
  • Date submitted to OIE 30/12/2011
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 13/12/2011
  • 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
  • Related reports
    • Immediate notification (23/12/2011)
    • Follow-up report No. 1 (30/12/2011)
• Outbreaks
  • There are no new outbreaks in this report
• 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 ongoing surveillance program on wild birds.
  • The date of the outbreak concerning wild birds ended is the same as the date the bird was found (17 December 2011).
  • A total of 19,451 poultry, including 15,569 chickens, 810 pigeons, 1,950 pheasants and 1,122 silky fowls were culled in the Cheung Sha Wan Temporary Wholesale Poultry Market on 21 December 2011.
  • Importation of live poultry and movement of poultry in local farms is banned for 21 days.
  • Surveillance and monitoring of local chicken farms has been stepped up.
  • So far, no H5 virus was detected in samples taken from the 30 chicken farms in Hong Kong.
• Control measures
  • Measures applied
    • Stamping out
    • Quarantine
    • Movement control inside the country
    • Screening
    • Zoning
    • 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 Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - immunohistochemical test - 20/12/2011 ? Positive
      • Birds - polymerase chain reaction (PCR) - 20/12/2011 ? Positive
      • Birds - virus isolation - 23/12/2011 ? Positive
  • Laboratory name and type Department of Microbiology, University of Hong Kong (Regional Reference Laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - gene sequencing - 25/12/2011 ? Positive
      • Wild species - gene sequencing - 25/12/2011 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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