FIG 4.

Biofilm formation kinetics of P. aeruginosa strains 11, 14, and 17 in two culture media (BHI and MH). Results were obtained after analysis of microplate images by the Biofilm Control Elements software and are expressed as BFI (biofilm index) as a function of incubation time. Analyses of results obtained by two-way ANOVA validated a statistically significant difference between each point of the different strain curves. Conversely, changing media did not implicate such significant differences between the two different curves for the same strain. Bars, standard deviation obtained from 12 measurements obtained for each strain (3 independent experiments performed in quadruplicate).