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

Information received on 10/11/2017 from Dr Kazuo Ito, Director, International Animal Health Affairs Office, Animal Health Division, Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries, Tokyo, Japan

Summary

Report type	Immediate notification
Date of start of the event	05/11/2017
Date of confirmation of the event	09/11/2017
Report date	10/11/2017
Date submitted to OIE	10/11/2017
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	08/03/2017
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic influenza A virus
Serotype	H5N6
Nature of diagnosis	Laboratory (basic), Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

SHIMANE ( Matsue-shi )

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Mute Swan:Anatidae (Cygnus olor)		1	1	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Mute Swan:Anatidae (Cygnus olor)	**	**	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 5th November 2017, one Cygnus olor (mute swan) was found dead in Matsue-shi and the sample derived from it was tested positive for influenza A virus by antigen-capture kit.
On 9th November 2017, the sample was confirmed positive for H5N6 subtype influenza A virus.
Enhanced monitoring of wild birds is ongoing within a ten-kilometer radius of the site.
Interviews and on-sight inspection were carried out on poultry farms in the ten kilometer area and no abnormality was found.

Control measures

Measures applied	Screening Disinfection Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

Tottori University ( Private Laboratory )

Tests and results

Species	Test	Test date	Result
Mute Swan	gene sequencing	09/11/2017	Positive
Mute Swan	haemagglutination (HA) test	09/11/2017	Positive
Mute Swan	haemagglutination inhibition test (HIT)	09/11/2017	Positive
Mute Swan	intravenous pathogenicity index (IVPI) test