OIE: Highly pathogenic avian influenza(H5N5), Chinese Taipei

Summary

Report type	Follow-up report No. 15
Date of start of the event	09/09/2019
Date of confirmation of the event	13/09/2019
Report date	18/05/2020
Date submitted to OIE	18/05/2020
Reason for notification	New strain of a listed disease in the country
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5N5
Nature of diagnosis	Laboratory (advanced)
This event pertains to	a defined zone within the country
Related reports	Immediate notification (23/09/2019) Follow-up report No. 1 (14/10/2019) Follow-up report No. 2 (22/11/2019) Follow-up report No. 3 (03/01/2020) Follow-up report No. 4 (06/01/2020) Follow-up report No. 5 (13/01/2020) Follow-up report No. 6 (22/01/2020) Follow-up report No. 7 (10/02/2020) Follow-up report No. 8 (20/02/2020) Follow-up report No. 9 (03/03/2020) Follow-up report No. 10 (10/03/2020) Follow-up report No. 11 (27/03/2020) Follow-up report No. 12 (07/04/2020) Follow-up report No. 13 (21/04/2020) Follow-up report No. 14 (11/05/2020) Follow-up report No. 15 (18/05/2020)

New outbreaks (1)

Outbreak 1 (2020-yl-8)

Mailiao Township, Yunlin County

Date of start of the outbreak

27/04/2020

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Birds	14734	1780	1780	12954	0

Affected population

Native Chickens(2020-yl-8)

Summary of outbreaks

Total outbreaks: 1

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Birds	14734	1780	1780	12954	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	12.08%	12.08%	100.00%	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

Samples from Yunlin County were sent to the National Laboratory, Animal Health Research Institute (AHRI) for diagnosis. Highly pathogenic avian influenza H5N5 subtype was confirmed by AHRI. The infected farm in Yunlin County has been placed under movement restriction. All animals on the infected farm have been culled. Thorough cleaning and disinfection have been conducted after stamping out operation. Surrounding poultry farms within 3 km radius of the infected farm 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 Traceability Quarantine Stamping out Zoning Disinfection Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type	Species	Test	Test date	Result
Animal Health Research Institute (AHRI) (National laboratory)	Birds	gene sequencing	30/04/2020	Positive
Animal Health Research Institute (AHRI) (National laboratory)	Birds	reverse transcription - polymerase chain reaction (RT-PCR)	29/04/2020	Positive

Future Reporting

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