Identification and molecular characterization of Van A-type vancomycin-resistant Enterococcus faecalis in Northeast of Brazil - Vilela, Marinalda Anselmo; Souza, Sandra Lavareda de; Palazzo, Izabel Cristina Vanzato; Ferreira, Joseane Cristina; Morais Jr., Marcos Antonio de; Darini, Ana Lúcia da Costa; Morais, Márcia Maria Camargo de (Memórias do Instituto Oswaldo Cruz, 2006)