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

Information received on 05/01/2010 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 29/12/2009
Date of first confirmation of the event 31/12/2009
Report date 05/01/2010
Date submitted to OIE 05/01/2010
Date event resolved 29/12/2009
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 04/2009
Manifestation of disease Sub-clinical infection
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 (Hok Tau)
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 on all poultry farms, poultry markets, pet bird shops, park birds and wild birds in Hong Kong.
This H5N1 infected wild bird was detected in our ongoing surveillance programme on wild birds. No spread of the disease was evident.
As this was a dead wild bird, the date of end of the event is the same as the finding of the bird (29 December 2009).

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 31/12/2009 Positive
Wild species polymerase chain reaction (PCR) 31/12/2009 Positive
Wild species virus isolation 04/01/2010 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.