Figure 1
Biofilm formation. Biofilm formation on 96-well polystyrene microtiter plates by A. baumannii grown statically in M9 medium for 24 hours in the absence (panel A) or presence (panel B) of imipenem concentrations 0.5 mg/L (strains AYE, 700, LUH 5875, 2979, ATCC 19606T and ATCC 17978), or 4 mg/L (all other strains). Strain and ST types are indicated on the bottom of the figure. Error bars represent standard deviations based on three independent experiments. Asterisks indicate statistically significant differences in biofilm formation among different STs (panel A) (p <0.05) and statistically significant induction in biofilm formation upon exposure to sub-MIC imipenem concentrations (panel B) (p <0.05).