OIE: Highly pathogenic avian influenza, Hong Kong (SAR

OIE: Highly pathogenic avian influenza, Hong Kong (SAR - PRC)
submited by kickingbird at Jan, 22, 2011 0:20 AM from OIE

Information received on 21/01/2011 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	Immediate notification
Start date	17/01/2011
Date of first confirmation of the event	19/01/2011
Report date	21/01/2011
Date submitted to OIE	21/01/2011
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

New outbreaks

Summary of outbreaks

Total outbreaks: 2

Location(s)

HONG KONG (Fairview Park, Yuen Long; Tai O, Lantau Island)

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Wild species		2	2	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. The H5N1 infected wild birds were detected in our ongoing surveillance programme on wild birds. No spread of disease was evident. As this report concerns wild birds, the dates of end of the outbreaks are the same as the dates on which the birds were found (17 and 18 January 2011, respectively).

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	19/01/2011	Positive
Wild species	immunohistochemical test	20/01/2011	Positive
Wild species	polymerase chain reaction (PCR)	19/01/2011	Positive
Wild species	polymerase chain reaction (PCR)	20/01/2011	Positive
Wild species	virus isolation	21/01/2011	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 continuing. Weekly follow-up reports will be submitted.

See Also:

http://www.oie.int

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