Canada's food watchdog along with Ravine Mushroom Farms Inc. issued a recall of Fresh Obsessions brand Ready To Serve Pre-washed Sliced White Mushrooms for possible Listeria monocytogenes contamination.

The recall affects 227-gram packages sold in Ontario with the UPC code 0 69200 00902 2 and lot code R12398.

No associated illnesses have been reported, the CFIA said.

Symptoms of listeriosis include:

• Vomiting.
  
• Nausea.
  
• Stomach cramps.
  
• Diarrhea.
  
• Severe headache.
  
• Constipation.
  
• Stiff neck.
  
• Loss of balance.
  
• Convulsions.
  

People who eat foods contaminated with listeria may carry the bacteria and still not develop listeriosis. Those most vulnerable to developing the disease include the elderly, infants and patients with a compromised immune system.

Pregnant women who develop listeriosis in their first trimester are at risk of miscarriage, while women in the later stages of pregnancy are at risk of delivering a stillborn or acutely ill infant.