The recall of hundreds of frozen waffle products and other toaster foods sold in many U.S. grocery stores has increased because they may be contaminated with hazardous substances Listeria bacteriathe manufacturer said on Tuesday.

TreeHouse Foods Inc. of Oak Brook, Illinois, said the updated recall affects all products manufactured at a factory in Ontario, Canada, and sold at stores such as Albertson’s, Aldi, Dollar General, Kroger, Publix, Target, Walmart and others become. The recall includes frozen toast waffles, Belgian waffles and pancakes, the company said.

No illnesses related to the recall have been confirmed.

The company is working with U.S. and Canadian food safety regulators to resolve the issue. The recalled waffles are sold under a variety of names, including Walmart’s Great Value and Target’s Good & Gather. A full list of affected products can be found here on the TreeHouse website. Consumers should throw away the products or return them to the store for a refund.

TreeHouse officials issued a limited recall on October 18th Routine testing found listeria at the factory in Brantford, Ontario. Further testing suggested that additional production lines at the plant may have been contaminated with the bacteria, the company said. Production was halted and the company said it intended to resume production after taking measures such as “thorough cleaning, sanitation, hygienic restoration” and other measures.

According to its website, the company operates 26 locations in the United States and Canada that produce private label food and beverages. No other facilities were affected, officials said.

Listeria infections can cause mild illnesses such as fever and diarrhea or more serious problems. The disease is most dangerous According to the U.S. Centers for Disease Control, it affects pregnant women, newborns, adults over 65 and people with weakened immune systems. It can take up to 10 weeks for symptoms to appear.

The CDC estimates that 1,600 people are infected with listeria each year in the United States 260 die.

This is the third major U.S. recall in recent months of foods that may be contaminated with listeria, a hardy bacteria that can be difficult to eradicate.

In July, Boar’s Head Provision Co. Inc. of Sarasota, Florida, recalled more than 7 million pounds of deli meat and closed its Jarratt, Virginia, plant. for delicatessen meat that is contaminated with listeria resulted in at least 10 deaths and nearly 50 hospitalizations.

This month BrucePac is based in Oregon almost £12 million recalled of meat and poultry processed at an Oklahoma plant after routine testing detected listeria.

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