Table 2.

The in vitro Activities of PMB Against Gram-Negative Organisms Isolated from BRICS

Isolates	Number	Carbapenem-Resistance Rate	MIC50	MIC90	MIC Range
Eco	5500	-	0.5	2	0.03–32
Kpn	2519	-	0.5	2	0.03–32
Pae	546	-	2	2	0.03–32
Aba	501	-	1	2	0.125–32
G-	10,066	-	0.5	2	0.03–32
CR-Eco	82	1.5	0.5	2	0.25–4
CR-Kpn	506	20.1	0.5	2	0.25–32
CR-Pae	210	38.5	2	2	0.5–4
CR-Aba	315	62.9	1	2	0.25–32
CR-G-	1169	11.6	1	2	0.25–32

Abbreviations: Eco, Escherichia coli; Kpn, Klebsiella pneumoniae; Pae, Pseudomonas aeruginosa; Aba, Acinetobacter baumannii; G-, Gram-negative; CR, carbapenem-resistant; PMB, polymyxin B; BRICS, Blood Bacterial Resistant Investigation Collaborative System.