OIE: Highly pathogenic avian influenza, Chinese Taipei

Information received on 13/08/2018 from Dr Tai-Hwa Shih, Chief Veterinary Officer, Deputy Director General, Bureau of Animal and Plant Health Inspection and Quarantine Council of Agriculture Executive Yuan, Ministry of Agriculture, Taipei, Chinese Taipei

Summary

Report type	Immediate notification
Date of start of the event	12/01/2018
Date of confirmation of the event	17/01/2018
Report date	13/08/2018
Date submitted to OIE	13/08/2018
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	2018
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5
Nature of diagnosis	Clinical, Laboratory (basic), Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 4

Outbreak Location

Pingtung County ( Jiadong Township )
Yunlin County ( Xiluo Township Huwei Township Citong Township )

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Birds	60591	230 **	230	60361	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	**	0.38%	**	100.00%

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

Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

One layer farm in Pingtung County, one layer farm and one duck farm in Yunlin County were sampled by the local Livestock Disease Control Centre (LDCC) in the process of intensified surveillance around infected holdings. Another chicken farm in Yunlin County was reported by the owner and was sampled by the LDCC. These samples had been sent to the National Laboratory, Animal Health Research Institute (AHRI) for analysis. Highly pathogenic avian influenza H5 subtype was confirmed by AHRI on 17 January, 10 February, 8 July and 20 April in 2018. These farms have been placed under movement restriction. All animals in these infected farms have been culled. Thorough cleaning and disinfection have been conducted after stamping out operation. Surrounding poultry farms within a three-kilometer radius of the infected farms are under intensified surveillance for three months.

Control measures

Measures applied	Movement control inside the country Surveillance outside containment and/or protection zone Surveillance within containment and/or protection zone Quarantine Official disposal of carcasses, by-products and waste Stamping out Disinfection Ante and post-mortem inspections 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 ( National laboratory )

Tests and results

Species	Test	Test date	Result
Birds	reverse transcription - polymerase chain reaction (RT-PCR)	17/01/2018	Positive
Birds	reverse transcription - polymerase chain reaction (RT-PCR)