Marathon Ventures, Inc. announced today that it is voluntarily recalling various retail and bulk packages containing raw macadamia nuts as a precautionary measure because the product may be contaminated with Salmonella, an organism which can cause serious and sometimes fatal infections in young children, frail or elderly people, and others with weakened immune systems. Healthy persons infected with Salmonella often experience fever, nausea, vomiting, diarrhea (which may be bloody), and abdominal pain.