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

Information received on 05/12/2016 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)

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

Reoccurrence 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

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

  • HONG KONG ( Mai Po, Yuen Long )

Total animals affected

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Northern Pintail:Anatidae (Anas acuta)

3

0

0

0

Outbreak statistics

Species

Apparent morbidity rate

Apparent mortality rate

Apparent case fatality rate

Proportion susceptible animals lost*

Northern Pintail:Anatidae (Anas acuta)

**

**

0.00%

**


* 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 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).

Control measures

Measures applied

  • Screening
  • 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

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

Northern Pintail

gene sequencing

05/12/2016

Positive

Northern Pintail

virus isolation

28/11/2016

Positive

Future Reporting

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