Reuters A drug-resistant "superbug" found in hospitals has a close cousin that is affecting athletes, prisoners and small children in growing numbers across the United States, disease experts said yesterday. Methicillin-resistant Staphylococcus aureus or MRSA can become fatal if not treated with the right antibiotics, said Daniel B. Jernigan of the Centers for Disease Control and Prevention. "MRSA is showing up in places it had never been seen before -- as a predominant cause of skin disease among children in some regions of the country, as clusters of abscesses among sports participants, as the most common cause of skin infections...