香港特別行政區政府

壎芵p

香港灣仔皇后大道東213

胡忠大廈1721

 

THE GOVERNMENT OF THE HONG KONG

SPECIAL ADMINISTRATIVE REGION

DEPATRMENT OF HEALTH

WU CHUNG HOUSE, 17TH & 21ST FLOORS,

213 QUEEN’S ROAD EAST, WAN CHAI

HONG KONG

 

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29 January 2004

Dear Healthcare Professionals,

 

Human infection with avian influenza A (H5N1) virus in Southeast Asia

 

                With the detection of cases of human infection with the avian influenza A (H5N1) virus recently in Southeast Asia, the Department of Health (DH) is closely monitoring the situation.

 

                The WHO has published the following draft case definitions for human influenza A (H5N1) infection:

 

Possible Case of Influenza A (H5N1)

l          person with acute respiratory illness, characterized by fever (temperature >38oC) and cough and/or sore throat, AND EITHER

l          contact with a confirmed case of Influenza A (H5N1) during the infectious period, OR

l          recent (less than 1 week) visit to a poultry farm in an area known to have outbreaks of highly pathogenic avian influenza (HPAI), OR

l          worked in a laboratory that is processing samples from persons or animals that are suspected from HPAI infection

 

Probable Case of Influenza A (H5N1)

l          possible case, AND

l          limited laboratory evidence for Influenza A (H5N1) (such as IFA positive using H5 monoclonal antibodies), OR

l          no evidence for another cause of disease

 

Confirmed Case of Influenza A (H5N1)

l          positive viral culture for Influenza A (H5N1), OR

l          positive PCR for Influenza (H5), OR

l          a 4-fold rise in H-5 specific antibody titer

 

For patients suspected to have influenza, the DH encourages respiratory specimens to be obtained for rapid tests for influenza A detection. The DH will provide public health consultation and laboratory confirmation service free of charge for rapid test positive cases. Please contact the Government Virus Unit for any enquiries on the arrangement of laboratory services at telephone number 2319-8237.

 

Thank you very much.

 

                                         Yours sincerely,

 

 

 

                                        (Dr Monica Wong)

                                   for Director of Health