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Highly pathogenic avian influenza,
Hong Kong (SAR - PRC)
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Information received on 06/12/2016 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)
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Summary
| Report type |
Immediate notification (Final report) |
| Date of start of the event |
25/11/2016 |
| Date of confirmation of the event |
05/12/2016 |
| Report date |
05/12/2016 |
| Date submitted to OIE |
06/12/2016 |
| Date event resolved |
25/11/2016 |
| Reason for notification |
Recurrence of a listed disease |
| Date of previous occurrence |
14/02/2016 |
| Manifestation of disease |
Sub-clinical infection |
| Causal agent |
Highly pathogenic avian influenza virus |
| Serotype |
H5N6 |
| Nature of diagnosis |
Laboratory (advanced) |
| This event pertains to |
the whole country |
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| Outbreak 1 |
Mai Po, Yuen Long, Hong Kong |
| Date of start of the outbreak |
25/11/2016 |
| Outbreak status |
Resolved (25/11/2016) |
| Epidemiological unit |
Natural park |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Northern Pintail:Anas acuta(Anatidae) |
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3 |
0 |
0 |
0 |
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| Affected population |
Three environmental samples |
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| Summary of outbreaks |
Total outbreaks: 1 |
| Total animals affected |
| Species |
Susceptible |
Cases |
Deaths |
Killed and disposed of |
Slaughtered |
| Northern Pintail:Anas acuta(Anatidae) |
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3 |
0 |
0 |
0 |
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| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Northern Pintail:Anas acuta(Anatidae) |
** |
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0.00% |
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| *Removed from the susceptible population through death, destruction and/or slaughter |
| **Not calculated because of missing information |
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Epidemiology
| Source of the outbreak(s) or origin of infection |
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| Epidemiological comments |
An intensive surveillance system is in place for avian influenza virus, including screening, at Mai Po Nature Reserve in Hong Kong. Three environmental samples were collected for the routine academic surveillance study by University of Hong Kong on 25 November 2016 and subsequently tested positive for H5N6. Additional sequencing results showed that these samples contain the DNA of Anas acuta (Northern pintail). The date of the end of the outbreak is the same as the date the samples were taken (25 November 2016). |
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Control measures
| Measures applied |
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Screening
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Vaccination permitted (if a vaccine exists)
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No treatment of affected animals
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| Measures to be applied |
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Diagnostic test results
| Laboratory name and type |
Species |
Test |
Test date |
Result |
| Centre of Influenza Research, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong (Regional Reference Laboratory) |
Northern Pintail |
gene sequencing |
05/12/2016 |
Positive |
| Centre of Influenza Research, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong (Regional Reference Laboratory) |
Northern Pintail |
virus isolation |
28/11/2016 |
Positive |
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Future Reporting
| The event is resolved. No more reports will be submitted. |
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Map of outbreak locations
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