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. 2019 Sep 19;10:2190. doi: 10.3389/fmicb.2019.02190

TABLE 3.

Effect of FK16 and Vancomycin combination in presence and absence of physiological salt concentration.

FK16 + VCN 0 mM NaCl 150 mM NaCl


FIC index Interpretationa FIC index Interpretationa
PAO1 0.25 Synergy 0.375 Synergy
PA-19660 0.375 Synergy 0.50 Synergy
PA-OS 0.375 Synergy 0.50 Synergy

aFIC Index = (MIC FK16 comb/MIC FK16 alone) + (MIC VCN comb/MIC VCN alone). FIC ≤ 0.5 represents synergy. FIC between 0.5 and 2 represents additive effect. FIC ≥ 2 represents inhibitory effect.