OIE: Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds), Chinese Taipei

OIE: Highly pathogenic influenza A viruses (infection with) (non-poultry including wild birds), Chinese Taipei
submited by kickingbird at Dec, 6, 2017 9:24 AM from OIE

Information received on 05/12/2017 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	01/12/2017
Date of confirmation of the event	04/12/2017
Report date	05/12/2017
Date submitted to OIE	05/12/2017
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	05/05/2017
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic influenza A virus
Serotype	H5N6
Nature of diagnosis	Laboratory (basic), Laboratory (advanced), Necropsy
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

TAINAN CITY ( Taijiang National Park )

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Black-faced spoonbill:Threskiornithidae (Platalea minor)		1	1	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Black-faced spoonbill:Threskiornithidae (Platalea minor)	**	**	100.00%	**

* 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

On 1 December 2017, one dead black-faced spoonbill was found in Taijiang National Park (Republic of China) by the staff of the National Park and was sent to the National Laboratory (Animal Health Research Institute, AHRI) by the local Livestock Disease Control Center (LDCC). H5N6 subtype of highly pathogenic avian influenza was detected and confirmed by the AHRI in the evening of 4 December 2017.
The LDCC disinfected the neighboring areas of the spot where the dead black-faced spoonbill was found and has completed clinical examination and sampling of all poultry farms (four chicken farms) within 5 km radius of the spot. All chicken in the four farms are clinically healthy. They are under intensified surveillance for three months to detect, if any, spreading of the virus.
In addition, to be further well-prepared for the increased risk of HPAI epidemics, the government have launched active surveillance over three categories of higher risk poultry farms: (1) poultry farms located within 3 km radius around wetlands nationwide; (2) outdoor feeding duck farms; and (3) native chicken farms.
According to preliminary analysis by the AHRI, the current H5N6 virus is different (identity 92.4%) from the H5N6 virus that was detected in February 2017, but is closely related to the one found in wild birds in Japan last November. The HA genomic sequences share about 99% identity with the H5N8 virus which has caused major outbreaks in Europe from late 2016 to early 2017. The NA genome is similar to the HxN6 which is widespread in wild birds in Eurasia.

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 Disinfection Ante and post-mortem inspections Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures