An outbreak of Listeria, which has killed one person and sickened several others, has been linked to Hispanic-style cheeses in several states.

According to reports from the CDC, cited in the Food Poisoning Bulletin, the cheeses were made by Roos Foods of Kenton, Del. and packaged through Megamart, which calls itself a "100 percent Latino" supermarket.

The soft cheeses, which include Queso Fresco and Cuajada en Terron (Fresh Cheese Curd), were sold under the brand names Santa Rosa de Lima, Amigo, Mexicana, Suyapa, La Chapina and La Purisima Crema Nica.

"Symptoms of Listeria infection generally appear about three weeks after exposure, but may appear as soon as three days or as long as 70 days after exposure," advises the Virginia Dept. of Agriculture and Consumer Services, which found the bacterium in a sample sold at a Megamart in unlabeled packaging. Listeria is most commonly contracted through the consumption of unpasteurized or contaminated milk.

On Sunday, Roos issued a voluntary recall for 16 varieties of its cheese products. According to CBS, the single death from the illness occurred in California, while there have been seven illnesses reported in Maryland. Two cases involved mother and newborn illnesses and all victims were Hispanic.

The U.S. Dept. of Health and Human Services advises on their food safety website that Listeria is different from many other forms of bacteria because it can grow and survive in the cold temperatures of most refrigeration units. In addition to dairy products, it can also be found in deli meats, meat spreads, hot dogs, smoked seafood and raw sprouts. At increased risk of illness due to the Listeria bacteria are older adults, pregnant women and people with weakened immune systems or already suffering from other illnesses.

Prompt treatment with antibiotics can cure the infection, and in pregnant women, can prevent the infection of the fetus.