OIE: Highly pathogenic avian influenza ,Japan

Information received on 13/11/2014 from Dr Toshiro Kawashima, CVO, Animal Health Division, Ministry of Agriculture, Forestry and Fisheries, Tokyo , Japan

Summary

Report type	Immediate notification (Final report)
Date of start of the event	03/11/2014
Date of pre-confirmation of the event	13/11/2014
Report date	13/11/2014
Date submitted to OIE	14/11/2014
Date event resolved	14/11/2014
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	16/04/2014
Manifestation of disease	Sub-clinical infection
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5N8
Nature of diagnosis	Laboratory (advanced)
This event pertains to	the whole country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

SHIMANE ( Yasugi-shi )

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Tundra Swan:Anatidae (Cygnus columbianus)		1	0	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Tundra Swan:Anatidae (Cygnus columbianus)	**	**	0.00%	**

* 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

It was confirmed on 13 November 2014 that 2 fecal samples from Cygnus columbianus (tundra swan) were positive for H5N8 influenza A virus. The samples had been collected by Kyoto Sangyo University on 3 November 2014. RT-PCR tests and virus sequencing were conducted and the result indicated that a HA0 cleavage site of the amino acid sequence was consistent with highly pathogenic avian influenza virus (positive results from fecal samples only and no clinical cases).

Control measures

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

Diagnostic test results

Laboratory name and type

Kyoto Sangyo University ( Private Laboratory )

Tests and results

Species	Test	Test date	Result
Tundra Swan	gene sequencing	13/11/2014	Positive
Tundra Swan	reverse transcription - polymerase chain reaction (RT-PCR)	13/11/2014	Positive
Tundra Swan