OIE: 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.