Information received on 03/02/2021 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)
Date of start of the event
28/01/2021
Date of confirmation of the event
31/01/2021
Report date
31/01/2021
Date submitted to OIE
03/02/2021
Date event resolved
28/01/2021
Reason for notification
Recurrence of a listed disease
Date of previous occurrence
06/01/2021
Manifestation of disease
Clinical disease
Causal agent
Highly pathogenic avian influenza virus
Serotype
H5N8
Nature of diagnosis
Laboratory (advanced)
This event pertains to
the whole country
New outbreaks (1)

Outbreak 1 (21-01327)
Lake Silver, Wu Kai Sha, Sha Tin, Hong Kong
Date of start of the outbreak
28/01/2021
Outbreak status
Resolved (28/01/2021)
Epidemiological unit
Not applicable
Affected animals
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Peregrin falcon:Falco peregrinus(Falconidae)

1
1
0
0
Affected population
A dead peregrine falcon was collected on 28 Jan 2021 in Lake Silver, Wu Kai Sha. The species is a common resident and winter visitor.
Summary of outbreaks
Total outbreaks: 1
Total animals affected
Species
Susceptible
Cases
Deaths
Killed and disposed of
Slaughtered
Peregrin falcon:Falco peregrinus(Falconidae)

1
1
0
0
Outbreak statistics
Species
Apparent morbidity rate
Apparent mortality rate
Apparent case fatality rate
Proportion susceptible animals lost*
Peregrin falcon:Falco peregrinus(Falconidae)
**
**
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 avian influenza intensive surveillance system is in place for all poultry farms, poultry markets, and pet bird shops in Hong Kong. The H5N8 infected animal was detected in the ongoing national surveillance program on wild birds. Neither the Hong Kong Wetland Park nor Mai Po Nature Reserve nor any poultry farms are located within three kilometres of the outbreak location. No spread of disease was evident. The date of end of the outbreak is the same as the date the bird was found (28 Jan 2021).

Control measures
Measures applied
Screening
Disinfection
Vaccination permitted (if a vaccine exists)
No treatment of affected animals
Measures to be applied
No other measures
Diagnostic test results
Laboratory name and type
Species
Test
Test date
Result
Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory)
Peregrin falcon
immunohistochemical test
29/01/2021
Positive
Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory)
Peregrin falcon
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
29/01/2021
Positive
Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department (National laboratory)
Peregrin falcon
virus isolation
31/01/2021
Positive
Future Reporting
The event is resolved. No more reports will be submitted.