Figure 3 From: The role of carbapenems in initial therapy for serious Gram-negative infections Efficacy of combination therapy against multidrug resistant Acinetobacter baumannii. cfu, colony forming units; Ctrl, control; IP, imipenem; PB, polymyxin B; Pos, positive; RI, rifampin. Adapted with permission [45]. Copyright © 2004 American Society for Microbiology.Back to article page