The Canadian Food Inspection Agency and Canada Safeway are warning the public about a dip that may be contaminated with Listeria.

Safeway initiated a voluntary recall of the affected products, which are the Signature Cafe 6-Layer Dip products with a best-before date of September 16.

The dips are imported from the U.S. and are sold in 425-gram and 850-gram sizes and have been distributed nationally.

Consumption of the Listeria monocytogenes bacteria can cause listeriosis, which can cause high fever, severe headache, neck stiffness, nausea, and complications in pregnancy.

"Pregnant women, the elderly and people with weakened immune systems are particularly at risk," the CFIA said.

"Infected pregnant women may experience only a mild, flu-like illness, however, infections during pregnancy can lead to premature delivery, infection of the newborn, or even stillbirth."

The CFIA said on Saturday that there have been no reports of illness.