OIE: Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds), Hong Kong (SAR - PRC)
Information received on 09/02/2018 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 |
| Date of start of the event |
07/02/2018 |
| Date of confirmation of the event |
09/02/2018 |
| Report date |
09/02/2018 |
| Date submitted to OIE |
10/02/2018 |
| Reason for notification |
Recurrence of a listed disease |
| Date of previous occurrence |
21/12/2017 |
| Manifestation of disease |
Clinical disease |
| Causal agent |
Highly pathogenic influenza A virus |
| Serotype |
H5N6 |
| Nature of diagnosis |
Laboratory (advanced) |
| This event pertains to |
the whole country |
New outbreaks
| Summary of outbreaks |
Total outbreaks: 1 |
| Outbreak Location |
- HONG KONG ( Lau Fau Shan, Tin Shui Wai, Yuen Long )
|
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Black-headed Gull:Laridae (Larus ridibundus) |
|
1 |
1 |
0 |
0 | |
| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Black-headed Gull:Laridae (Larus ridibundus) |
** |
** |
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 |
|
| Epidemiological comments |
An intensive surveillance system is in place for all poultry farms, poultry markets, and pet bird shops in Hong Kong. The H5N6 infected wild bird was detected in the ongoing national surveillance program on wild birds. There are two poultry farms located within three kilometres of where the bird was found. No abnormalities or signs of avian influenza were found in the two poultry farms. The Hong Kong Wetland Park is located within three kilometres of where the bird was found. No spread of disease was evident. The date of end of the outbreak is the same as the date the bird was found (7 February 2018). |
Control measures
| Measures applied |
- Screening
- Disinfection
- Vaccination permitted (if a vaccine exists)
- No treatment of affected animals
|
| Measures to be applied |
|
Diagnostic test results
| Laboratory name and type |
Tai Lung Veterinary Laboratory, Agriculture, Fisheries & Conservation Department ( National laboratory ) |
| Tests and results |
| Species |
Test |
Test date |
Result |
| Black-headed Gull |
immunohistochemical test |
08/02/2018 |
Positive |
| Black-headed Gull |
real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) |
08/02/2018 |
Positive |
| Black-headed Gull |
virus isolation |
09/02/2018 |
Positive | |
| Laboratory name and type |
Centre of Influenza Research, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong ( Regional Reference Laboratory ) |
| Tests and results |
| Species |
Test |
Test date |
Result |
| Black-headed Gull |
gene sequencing |
|
Pending | |
| Laboratory name and type |
National Influenza Centre, Centre for Health Protection, Department of Health ( Regional Reference Laboratory ) |
| Tests and results |
| Species |
Test |
Test date |
Result |
| Black-headed Gull |
gene sequencing |
|
Pending | |
Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. |