People in Illinois may want to cut back on the cheese. Les Freres cheese made by Crave Brothers Farmstead Classics has been linked to multiple listeria cases across the nation, including at least one case in Illinois. Anyone with Les Freres, Petit Frere, and Petit Frere with Truffles in their fridge should throw it out. Health officials say people infected with listeria experience fever, muscle aches, headache, stiff neck, confusion, loss of balance, and convulsions. Symptoms often begin three weeks after infection, but can take anywhere from three to 70 days to clear up.