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CHARLES COUNTY, Md. (WUSA9) -- The Maryland Department of Health and Mental Hygiene is warning consumers not to eat cheeses made by Roos Foods.

Health officials say the testing of the cheese products is "presumptively positive for Listeria bacteria" and confirmatory testing is underway.

Products made by Roos Foods include Santa Rosa de Lima, Amigo, Mexicana, Suyapa, La Chapina, and La Purisima Crema Nica.

Consumers should not eat any cheese products made by Roos Foods, or foods that have been made with these cheeses.

Listeria bacteria can cause a serious infection called listeriosis. Symptoms of listeriosis include fever, muscle aches, headache, stiff neck, confusion, loss of balance, and convulsions which can be preceded by nausea or diarrhea.

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