Investigators say the source of a deadly pig virus that turned up on a Manitoba farm remains a mystery.
The province’s veterinary office said it has ruled out infected feed or the movement of pigs to and from the farm.
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Samples from 60 locations linked to the farm have not tested positive for the virus, known as porcine epidemic diarrhea, the Manitoba government said.
But officials said they have found a second sample of the virus at an unidentified facility that handles large numbers of pigs in the province.
The highly contagious virus has been confirmed on 43 farms in Ontario and on one farm in each of Manitoba, Quebec and Prince Edward Island.
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