Highly pathogenic avian influenza, Hong Kong (SAR - PRC) (OIE, March 4 2011)

[Giuseppe]

Highly pathogenic avian influenza, Hong Kong (SAR - PRC) (OIE, March 4 2011)


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

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

Information received on 04/03/2011 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. 4
  • Start date 17/01/2011
  • Date of first confirmation of the event 19/01/2011
  • Report date 04/03/2011
  • Date submitted to OIE 04/03/2011
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 18/12/2010
  • 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 (21/01/2011)
    • Follow-up report No. 1 (28/01/2011)
    • Follow-up report No. 2 (31/01/2011)
    • Follow-up report No. 3 (07/02/2011)
    • Follow-up report No. 4 (04/03/2011)

• New outbreaks
  • Outbreak 1 - Sham Shek Tsuen, Lantau Island, HONG KONG
    • Date of start of the outbreak 01/03/2011
    • Outbreak status Resolved (01/03/2011)
    • Epidemiological unit Not applicable
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Birds - ... - 1 - 1 - 0 - 0
      • Affected Population:
        • A goose carcass from unknown source was collected on 1 March 2011 at the shore of Sham Shek Tsuen.
        • The carcass was badly decomposed at the time of collection.

• Summary of outbreaks
  • Total outbreaks: 1
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - ** - ** - 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, park birds and wild birds in Hong Kong.
  • Since February 2006, the HKSAR Government has banned backyard poultry farming and daily rural patrols throughout the territory have been put in place since then; this activity has been enhanced since the occurrence of the event.
  • No poultry farm or backyard poultry farming activities were detected within the 3-km-radius affected zones.
  • The monitoring on local poultry farms was also enhanced and no irregularity was detected.
  • The HKSAR government will continue to monitor the situation including wild bird surveillance and local poultry farm monitoring.
  • No spread of disease was evident.

• 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
      • Birds - polymerase chain reaction (PCR) - 04/03/2011 - Positive
      • Birds - virus isolation - 04/03/2011 - 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 - Pending

• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

(...)
-
------