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