Schulze and Burch Biscuit Co., of Chicago, ILL is voluntarily recalling a variety of Millville Protein Chewy Bars products because they have the potential to be contaminated with Listeria monocytogenes, an organism which can cause serious and sometimes fatal infections in young children, frail or elderly people, and others with weakened immune systems. Although healthy individuals may suffer only short-term symptoms such as high fever, severe headache, stiffness, nausea, abdominal pain and diarrhea.