Report type

Immediate notification

Date of start of the event

22/04/2014

Date of pre-confirmation of the event

16/07/2014

Report date

12/08/2014

Date submitted to OIE

12/08/2014

Reason for notification

New strain of a listed disease

Manifestation of disease

Clinical disease

Causal agent

Highly pathogenic avian influenza virus

Serotype

H5N6

Nature of diagnosis

Clinical, Laboratory (advanced)

This event pertains to

a defined zone within the country

Summary of outbreaks

Total outbreaks: 2

Outbreak Location

• LANG SON (Keo Quang, Chi Lang, Trang Dinh)
• HA TINH (Tan Son, Ky Tho, Ky Anh)

Total animals affected

Outbreak statistics

* Removed from the susceptible population through death, destruction and/or slaughter;

Source of the outbreak(s) or origin of infection

• Unknown or inconclusive

Epidemiological comments

This is a new strain detected from outbreak surveillance activities.
The initial result was positive for H5 but negative for N1. Therefore further testing was needed and the final result was only available in July 2014 (N6 positive).
All poultry in affected flocks were destroyed immediately when poultry showing clinical signs of HPAI were detected.
Samples were taken from surrounding poultry flocks. All were negative for avian influenza.

Measures applied

• Control of wildlife reservoirs
• Stamping out
• Movement control inside the country
• Screening
• Disinfection of infected premises/establishment(s)
• No vaccination
• No treatment of affected animals

Measures to be applied

• No other measures

Laboratory name and type

National Centre for Veterinary Diagnosis (NCVD) (National laboratory)

Tests and results

The event is continuing. Weekly follow-up reports will be submitted.