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AVIAN INFLUENZA (08): CHINA (HONG KONG) H5N1, GULL, OIE Update: 2/5/2013 3:24:15 PM (GMT+7)

Date: Tue 29 Jan 2013 Source: OIE, WAHID (World Animal Health Information Database), weekly

Highly pathogenic avian influenza, Hong Kong (SAR - PRC)
------------------------------
--------------------------
Information received on (and dated) 29 Jan 2013 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 (final report)
Start date: 25 Jan 2013
Date of pre-confirmation of the event: 29 Jan 2013
Reason for notification: reoccurrence of a listed disease
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
Outbreak 1: Mouse Island children's playground, Hoi Wing Road, Tuen
Mun, Hong Kong
Date of start of the outbreak: 25 Jan 2013
Outbreak status: resolved (25 Jan 2013)
Affected animals
Species: black-headed gull (_Larus ridibundus_)
Cases: 1
Deaths: 1
Affected population: a black-headed gull was collected on 25 Jan 2013
at Mouse Island children's playground, Hoi Wing Road, Tuen Mun. The
black-headed gull is a common winter visitor in Hong Kong.

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, and pet bird shops in Hong
Kong. The H5N1 infected wild bird was detected in our ongoing
surveillance program on wild birds. No spread of disease was evident.
The date of closure of the event is the date of end of the outbreak,
which is the date the bird was found (that is, 25 Jan 2013).

Control measures applied: screening, disinfection of infected
premises/establishment(s); no vaccination; no treatment of affected
animals

Diagnostic test results
Laboratory name and type: Tai Lung Veterinary Laboratory, Agriculture,
Fisheries & Conservation Department (National laboratory)
Species / Test / Test date / Result
Black-headed gull / immunohistochemical test / 29 Jan 2013 / Positive

Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation
Department (National laboratory)
Species / Test / Test date / Result
Black-headed gull / polymerase chain reaction (PCR) / 29 Jan 2013 /
Positive

Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation
Department (National laboratory)
Species / Test / Test date / Result
Black-headed gull / virus isolation / - / Pending

Centre of Influenza Research, School of Public Health, Li Ka Shing
Faculty of Medicine, University of Hong Kong (Regional Reference
Laboratory)
Species / Test / Test date / Result
Black-headed gull / gene sequencing / - / Pending

Future reporting
The event is resolved. No more reports will be submitted.
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