Xan Confections is voluntarily recalling 13 of its gourmet peanut butter chocolate products because they have the potential to be contaminated with Salmonella, an organism that 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, diarrhea (which may be bloody), nausea, vomiting and abdominal pain.