Carleton Mushroom Farms is recalling some of its products due to possible Listeria contamination.
The mushrooms were sold in 227-gram packages with a best before date of Nov. 8.
The Canadian Food Inspection Agency says they were marketed in Ontario and Quebec, and possibly other provinces and territories.
It says the mushrooms should be thrown out or returned to where they were purchased.
No reports of illness have been linked to the product, however, symptoms of Listeria poisoning can include vomiting, nausea, persistent fever, muscle aches, severe headache and neck stiffness, and even death.