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Seneca Valley Virus situation in Canada: First case on farm in Ontario

SVA is widespread in the USA but until now has not been reported from any Canadian farms. SVA has been seen previously in Canadian pigs sent to USA for slaughter and in certain Canadian assembly yards.

Wednesday 2 October 2019 (3 months 17 days ago)
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Ontario

On June 29, 2019, the Ontario Ministry of Agriculture, Food and Rural Affairs(OMAFRA) was notified of a confirmed case of Seneca virus A (SVA) in a sow herd in Ontario.

The sow herd had clinical signs of animals being off feed, an increase in pre-weaning mortality, and blisters (vesicular lesions). The herd veterinarian was notified who then contacted the Canadian Food Inspection Agency (CFIA). The CFIA collected samples from the farm that tested negative for other vesicular foreign animal diseases e.g. foot-and-mouth disease (FMD) but were confirmed to be positive for SVA. Associated farms are being tested and observed.

Manitoba

SVA was found in pigs sent to the USA from a single herd in 2008. MB assembly yards are now considered positive for SVA and a high degree of environmental contamination has previously been found in these yards.The yards have cooperated on multiple trace backs from US slaughter condemnations and no further positive herds have been found. The source to the yards remains unknown but is believed to be US source from transport contamination.

There have not been any recent cases linked to MB assembly yards. The last trace back we conducted was in the first quarter of 2018.

Saskatchewan

To date, SVA has not been detected in a swine herd in SK, nor has it been found at an assembly yard (no regular testing at assembly yards).

Alberta

Cases have been reported in Alberta hogs sent to the USA for slaughter over the past two years. CFIA tracebacks have found no evidence of SVA on Alberta farms. It is suspected that Alberta pigs are contacting the virus either during transport or lairage in the USA. Environmental surveillance samples taken from assembly yards, abattoirs and truck washes in Alberta in 2016 and 2017 did not find any virus.

July 2019/ Alberta Pork/ Canada.
https://www.albertapork.com

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