Samples taken from a "high-pig traffic site" in Manitoba tested positive for a virus that’s proven deadly to piglets, the province reports.
The Office of the Chief Veterinary Officer said a "single set of environmental samples, not from an animal," tested positive for the porcine epidemic diarrhea virus.
A farm in southeastern Manitoba reported a case of the PED virus last month.
The PED virus has already killed millions of piglets in the U.S. The virus is fatal for very young pigs while most older pigs recover.
The virus is spread in feces. It poses no danger to human health, nor is it a food-safety threat.
A piglet can die within six days and the virus is highly contagious to others in a litter.
"The investigation into how the PED virus may have arrived on the single infected farm in Manitoba continues, but feed and the movement of an infected pig onto the farm have been ruled out as possible sources," a release from the province said Friday.
"The Office of the CVO has tested samples from all of the farm premises that had contact with the infected farm. To date, tests from 60 premises have been completed and confirmed negative for PED."
The province said 32 farms have tested positive for PED across Canada including one in Manitoba, one in Prince Edward Island, one in Quebec and 29 in Ontario.
"Producers are encouraged to remain vigilant with the necessary biosecurity protocols that prevent the spread of PED and are reminded they must report all suspected cases to their veterinarian.
"Producers who have questions about PED, biosecurity and related issues should contact the Manitoba Pork Council at 1-888-893-7447 (toll-free) or online at www.manitobapork.com for their resources and expertise."