Fig. 2.

Distribution of FIC values in different bacterial species. Horizontal axis represents the species of isolates. Others in the horizontal axis include species K. michiganensis, E. hormaechei, P. rettgeri, R. planticola, C. freundii and C. koseri, for each of which <5 strains were tested. The red, blue and green boxes represented the FIC values of <1, 1 (inclusive) ∼2 and ≥2, respectively. The longitudinal axis is a proportional scaler. P value calculated between species pairs that exhibited significant difference (P < 0.05) in the checkerboard synergy testing were labeled on the top.