Emergence of polymyxin B-resistant KPC-2-producing Klebsiella pneumoniae ST11 clone in an University Hospital in Brazil - Andrade, Leonardo Neves de; Vitali, Lucia Helena; Gaspar, G. G.; Martinez, Roberto; Darini, Ana Lucia da Costa (Interscience Conference on Antimicrobial Agents and Chemotherapy (ICAAC), 2012)