Report type

Immediate notification

Date of start of the event

17/12/2014

Date of pre-confirmation of the event

26/12/2014

Report date

26/12/2014

Date submitted to OIE

26/12/2014

Reason for notification

Reoccurrence of a listed disease

Date of previous occurrence

29/07/2014

Manifestation of disease

Sub-clinical infection

Causal agent

Low pathogenic avian influenza virus

Serotype

H5

Nature of diagnosis

Laboratory (advanced)

This event pertains to

a defined zone within the country

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

• YILAN COUNTY ( Jiaoxi Township )

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

H7N9 subtype LPAI was confirmed on 16 December 2014 from a wild bird faecal sample in a wetland in Yilan County by active surveillance program. The gene sequence of the H7N9 subtype LPAI is different from China’s strain. This wild bird case will be reported in OIE wildlife annual report specifically. Subsequently, a RNA product of H5 avian influenza virus (AIV) was detected in a duck breeder farm within 3 Km-radius of the aforementioned wetland by intensified active surveillance. The gene sequence analysis of the HA0 cleavage site of the H5 RNA demonstrated that the causal agent was of low pathogenicity. Movement restriction was implemented on the duck breeder farm. Clinical investigation on the affected farm showed that the ducks were in healthy condition without abnormal mortality and egg production. The clinical investigation and surveillance of surrounding poultry farms are ongoing.

Measures applied

• Quarantine
• Movement control inside the country
• Screening
• Zoning
• Disinfection of infected premises/establishment(s)
• Vaccination prohibited
• No treatment of affected animals

Measures to be applied

• No other measures

Laboratory name and type

Animal Health Research Institute ( National laboratory )

Tests and results