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

Information received on 29/12/2017 from Mr Hans Wyss, Chief Veterinary Officer, Schwarzenburgstrasse 161, Swiss Federal Veterinary Office, LIEBEFELD BERNE, Switzerland

Summary

Report type	Immediate notification
Date of start of the event	18/12/2017
Date of confirmation of the event	22/12/2017
Report date	29/12/2017
Date submitted to OIE	29/12/2017
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	22/03/2017
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	the whole country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

BERN ( Bielersee, Erlach, Seeland )

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	This is the first detection of the subtype H5N6 in Switzerland. Samples were sent to the Friedrich-Loeffler Institute (FLI), Germany, for further analysis. First preliminary results suggest a relation to the HPAI virus H5N8/H5N6 strains recently detected in Europe.

Control measures

Measures applied	Surveillance within containment and/or protection zone Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

National Reference Centre for Diseases of Poultry and Rabbits (NRGK) ( National laboratory )

Tests and results

Species	Test	Test date	Result
Mute Swan	reverse transcription - polymerase chain reaction (RT-PCR)	22/12/2017	Positive

Future Reporting

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