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. 2005 Jul;73(7):4138–4145. doi: 10.1128/IAI.73.7.4138-4145.2005

FIG. 4.

FIG. 4.

Polymyxin assay. The graph shows the MICs of polymyxin necessary to inhibit the growth of the different strains. The MIC was considered the lowest drug concentration that reduced growth >50% compared with the growth in the control well. The MICs of polymyxin for strains χ7122 (wild type), K3 (ΔpstCAB::kan), and CK3 [K3(pAN92)] are shown. The MIC for the pst mutant strain K3 was significantly lower than that for the wild-type χ7122 strain (P < 0.001). The MIC differences between the complemented strain CK3 and either strain χ7122 or strain K3 were significant (P = 0.044).