ELGIN, Ill.--(BUSINESS WIRE)--John B. Sanfilippo & Son, Inc. (JBSS) announced today that it is voluntarily recalling Fisher 8 oz. Chopped Walnuts and Fisher 8 oz. Pecan Cookie Pieces packaged in plastic bags because some of these products may be contaminated with Salmonella. Salmonella is 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 experie