OIE: Highly pathogenic avian influenza, Hong Kong (SAR - PRC)
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 |
|
| 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 |
|
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. |