OIE: Low pathogenic avian influenza (poultry) ,Chinese Taipei

Information received on 22/11/2012 from Dr Kwo-Ching Huang, Chief Veterinary Officer and Deputy Director General, , Bureau of Animal and Plant Health Inspection and Quarantine Council of agriculture, Executive Yuan , Taipei, Chinese Taipei

Summary

Report type

Immediate notification

Date of start of the event

12/11/2012

Date of pre-confirmation of the event

20/11/2012

Report date

22/11/2012

Date submitted to OIE

23/11/2012

Reason for notification

Reoccurrence of a listed disease

Date of previous occurrence

13/07/2012

Manifestation of disease

Sub-clinical infection

Causal agent

Low pathogenic avian influenza virus

Serotype

H5N2

Nature of diagnosis

Laboratory (advanced)

This event pertains to

a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

  • CHIA-I ( Pu-Zih )

Total animals affected

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

15700

**

0

0

0

Outbreak statistics

Species

Apparent morbidity rate

Apparent mortality rate

Apparent case fatality rate

Proportion susceptible animals lost*

Birds

**

0.00%

**

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

The notifiable avian influenza (NAI) viral infection was detected on a layer chicken farm during active surveillance and identified as H5N2 strain by virus isolation. Movement restriction was implemented on the infected farm. Clinical and epidemiological investigation in the infected farm was done and the result showed that the layers were in healthy condition without drop of egg production. The positive results of serological, virological tests and analyzed data of gene sequencing confirmed this H5N2 outbreak as LPAI. The clinical and epidemiological investigations of surrounding poultry farms were conducted.

Note by the OIE Animal Health Information Department: H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2012).

Control measures

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

Diagnostic test results

Laboratory name and type

Animal Health Research Institute (AHRI) ( National laboratory )

Tests and results

Species

Test

Test date

Result

Birds

gene sequencing

22/11/2012

Negative

Birds

haemagglutination inhibition test (HIT)

20/11/2012

Positive

Birds

virus isolation

20/11/2012