Fig. 3From: Association of virulence gene expression with colistin-resistance in Acinetobacter baumannii: analysis of genotype, antimicrobial susceptibility, and biofilm formationFrequency comparison of weak (W), moderate (M), and strong (S) biofilm forming A. baumannii isolates according to their IC lineage. Analysis included semi-quantitative measurements of biofilm formation strength (see “Methods” section). Bars indicate Mean + SEM; *P < 0.05; **P < 0.01Back to article page