OIE: Highly pathogenic avian influenza ,Sweden

OIE: Highly pathogenic avian influenza ,Sweden
submited by kickingbird at Mar, 22, 2015 19:30 PM from OIE

Information received on 20/03/2015 from Dr Ingrid Eilertz, Chief Veterinary Officer Director and Head, Swedish Board of Agriculture Department for Animal Welfare and Health, Ministry for Rural Affairs, J?nk?ping, Sweden

Summary

Report type	Immediate notification (Final report)
Date of start of the event	18/02/2015
Date of pre-confirmation of the event	19/03/2015
Report date	20/03/2015
Date submitted to OIE	20/03/2015
Date event resolved	20/03/2015
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	26/04/2006
Manifestation of disease	Sub-clinical infection
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5N8
Nature of diagnosis	Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 2

Outbreak Location

STOCKHOLMS L?N ( Djurg?rden, Stockholm, Stockholm S. Blasieholmshamnen, Stockholm, Stockholm )

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Mute Swan:Anatidae (Cygnus olor)		2	2	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

Ten mute swans found dead in central Stockholm (two batches of five swans each) were post-mortem examined and tested for avian influenza virus as part of routine surveillance.
The first five examined were all negative for avian influenza virus and post-mortem exam followed by chemical analysis confirmed lead poisoning. The last five were all positive for influenza A virus (matrix-gene positive). None had macroscopic lesions suggesting highly pathogenic avian influenza infection, whereas macroscopic lesions suggesting possible lead poisoning were found in four, and lesions suggesting traumatic injury found in the fifth.
Two of the birds were positive for H5 and were subsequently typed as highly pathogenic avian influenza H5N8.
There are no commercial poultry holdings in the near vicinity.
In accordance with the OIE Terrestrial Animal Health Code, Article 10.4.1, point 8, this outbreak does not change the disease free status of Sweden as the birds involved in this outbreak are wild mute swans and do not fall within the OIE definition of poultry.

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

National Veterinary Institute ( National laboratory )

Tests and results

Species	Test	Test date	Result
Mute Swan	real-time PCR	19/03/2015	Positive

Future Reporting

The event is resolved. No more reports will be submitted.

See Also:

http://www.oie.int

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