Spread of methicillin-resistant Staphylococcis aureus clone isolated from bacteremia in elderly patients in a Brazilian general hospital - Ribas, Rosineide Marques; Darini, Ana Lúcia da Costa; Ferreira, Joseane Cristina; Freitas, Claudete; Gontijo filho, Paulo (Antimicrobial Agents and Chemotherapy, 2007)