An Illinois company is recalling frozen waffles sold by more than a dozen major retailers under multiple labels because of possible listeria contamination.

Though no illnesses have been reported, TreeHouse Foods said Friday that the breakfast products were widely distributed throughout the United States and Canada, primarily as private label offerings by Walmart, Target, Tops, Harris Teeter, Publix and other large merchants.

The suspected contamination was discovered through routine testing at a manufacturing facility in Ontario, Canada, according to the company announcement.

Neither TreeHouse nor the Food and Drug Administration responded to requests for comment Monday.

Listeria is a bacteria that can cause serious and sometimes fatal infections in young children, elderly people, or those with weakened immune systems. Symptoms include high fever, severe headaches, stiffness, nausea, abdominal pain and diarrhea.

For pregnant women, it can cause miscarriages or stillbirths.

Consumers are advised to throw out the waffles and contact the retailer for a purchase credit. The specific recalled products are listed here alongside their product code, lot code and expiration date. People can call the company’s consumer affairs phone line at 800-596-2903 with additional questions.

Here are the recalled products.

• Always Save 9.9-ounce homestyle waffles.

• Best Choice 12.3-ounce chocolate chip, blueberry, original, buttermilk or multigrain waffles.

• Bettergoods 10.72-ounce blueberry protein, chocolate chip protein or vanilla protein buttermilk waffles.

• Breakfast Best 12.3-ounce homestyle, chocolate chip, blueberry, cinnamon or pumpkin waffles.

• Clover Valley 12.3-ounce homestyle or buttermilk waffles.

• Essentials 9.9-ounce homestyle waffles.

• Food Lion 12.3-ounce blueberry, reduced fat homestyle or reduced fat buttermilk waffles.

• Foothold 12.3-ounce blueberry, homestyle, buttermilk, chocolate chip or multigrain waffles.

• Giant Eagle 12.3-ounce blueberry, homestyle or buttermilk waffles.

• Good & Gather 10.7-ounce buttermilk vanilla waffles and 12.3-ounce homestyle, buttermilk or blueberry waffles.

• Great Value 12.3-ounce homestyle, buttermilk or blueberry waffles and 560-gram blueberry waffles.

• Hannaford 12.3-ounce chocolate chip, blueberry, homestyle, reduced fat buttermilk or multigrain waffles.

• Harris Teeter 12.3-ounce blueberry, homestyle, buttermilk or multigrain waffles.

• H-E-B Higher Harvest 10.72-ounce original protein waffles.

• Kodiak Cakes 13.4-ounce vanilla buttermilk waffles and 10.2-ounce dark chocolate or chocolate chip waffles.

• Pics by Price Chopper 12.3-ounce chocolate chip, blueberry, homestyle or buttermilk waffles.

• Publix 12.3-ounce homestyle or buttermilk waffles.

• Schnucks 12.3-ounce chocolate chip, blueberry, homestyle or reduced fat buttermilk waffles.

• SE Grocers 12.3-ounce chocolate chip, blueberry, reduced fat homestyle or buttermilk waffles.

• Simple Truth 13.4-ounce vanilla buttermilk waffles.

• Tops 12.3-ounce blueberry, homestyle, buttermilk or chocolate chip waffles.

• Western Family 280-gram homestyle waffles.