OIE: Highly pathogenic avian influenza, Chinese Taipei

Report type	Follow-up report No. 77
Date of start of the event	07/01/2015
Date of confirmation of the event	11/01/2015
Report date	06/11/2017
Date submitted to OIE	08/11/2017
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	23/07/2014
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5N2
Nature of diagnosis	Clinical, Laboratory (advanced)
This event pertains to	a defined zone within the country
Related reports	Immediate notification (12/01/2015) Follow-up report No. 1 (13/01/2015) Follow-up report No. 2 (15/01/2015) Follow-up report No. 3 (16/01/2015) Follow-up report No. 4 (19/01/2015) Follow-up report No. 5 (21/01/2015) Follow-up report No. 6 (28/01/2015) Follow-up report No. 7 (04/02/2015) Follow-up report No. 8 (11/02/2015) Follow-up report No. 9 (17/02/2015) Follow-up report No. 10 (26/02/2015) Follow-up report No. 11 (04/03/2015) Follow-up report No. 12 (12/03/2015) Follow-up report No. 13 (19/03/2015) Follow-up report No. 14 (25/03/2015) Follow-up report No. 15 (02/04/2015) Follow-up report No. 16 (14/04/2015) Follow-up report No. 17 (17/04/2015) Follow-up report No. 18 (24/04/2015) Follow-up report No. 19 (01/05/2015) Follow-up report No. 20 (11/05/2015) Follow-up report No. 21 (18/05/2015) Follow-up report No. 22 (29/05/2015) Follow-up report No. 23 (04/06/2015) Follow-up report No. 24 (12/06/2015) Follow-up report No. 25 (18/06/2015) Follow-up report No. 26 (07/07/2015) Follow-up report No. 27 (13/07/2015) Follow-up report No. 28 (20/07/2015) Follow-up report No. 29 (27/07/2015) Follow-up report No. 30 (31/07/2015) Follow-up report No. 31 (11/08/2015) Follow-up report No. 32 (24/08/2015) Follow-up report No. 33 (04/09/2015) Follow-up report No. 34 (02/10/2015) Follow-up report No. 35 (21/10/2015) Follow-up report No. 36 (30/10/2015) Follow-up report No. 37 (08/12/2015) Follow-up report No. 38 (04/01/2016) Follow-up report No. 39 (15/01/2016) Follow-up report No. 40 (02/02/2016) Follow-up report No. 41 (22/02/2016) Follow-up report No. 42 (07/03/2016) Follow-up report No. 43 (11/04/2016) Follow-up report No. 44 (19/04/2016) Follow-up report No. 45 (05/05/2016) Follow-up report No. 46 (20/06/2016) Follow-up report No. 47 (21/09/2016) Follow-up report No. 48 (17/10/2016) Follow-up report No. 49 (09/01/2017) Follow-up report No. 50 (06/02/2017) Follow-up report No. 51 (01/03/2017) Follow-up report No. 52 (07/03/2017) Follow-up report No. 53 (17/03/2017) Follow-up report No. 54 (20/03/2017) Follow-up report No. 55 (27/03/2017) Follow-up report No. 56 (10/04/2017) Follow-up report No. 57 (11/04/2017) Follow-up report No. 58 (01/05/2017) Follow-up report No. 59 (08/05/2017) Follow-up report No. 60 (15/05/2017) Follow-up report No. 61 (03/06/2017) Follow-up report No. 62 (07/06/2017) Follow-up report No. 63 (16/06/2017) Follow-up report No. 64 (23/06/2017) Follow-up report No. 65 (27/06/2017) Follow-up report No. 66 (03/07/2017) Follow-up report No. 67 (11/07/2017) Follow-up report No. 68 (17/07/2017) Follow-up report No. 69 (24/07/2017) Follow-up report No. 70 (31/07/2017) Follow-up report No. 71 (07/08/2017) Follow-up report No. 72 (22/08/2017) Follow-up report No. 73 (31/08/2017) Follow-up report No. 74 (05/09/2017) Follow-up report No. 75 (11/10/2017) Follow-up report No. 76 (30/10/2017) Follow-up report No. 77 (06/11/2017)

New outbreaks (1)

Outbreak 1 (2017-yl-90)

Dongshi Township, YUNLIN COUNTY

Date of start of the outbreak

01/11/2017

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Birds	6250	2565	2565	3685	0

Affected population

Ducks (2017-yl-90)

Summary of outbreaks

Total outbreaks: 1

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Birds	6250	2565	2565	3685	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	41.04%	41.04%	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 H5N2 subtype was confirmed by AHRI. The infected farm 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 Disinfection / Disinfestation Screening Quarantine Stamping out Zoning 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 (National laboratory)	Birds	gene sequencing	04/11/2017	Positive
Animal Health Research Institute (National laboratory)	Birds	reverse transcription - polymerase chain reaction (RT-PCR)	03/11/2017	Positive

Future Reporting

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