Fig. 3

Comparison of the bacteriostatic activities of media produced in the presence of common organic preservatives. The evolution of the contamination was measured over 7 days and was expressed as the logarithmic variation of the initial inoculum (Δlog CFU: colony-forming unit). a Phenoxy ethanol 0.3% green lines , 0.32% blue dotted lines and 0.35 red dotted lines%. b Sodium benzoate 0.01% green lines, 0.03% blue dotted lines, 0.04% red dotted lines, and 0.05% orange dotted lines. c POBM (methyl paraben) 0.1% green lines, 0.12% blue dotted lines and 0.15% red dotted lines. d MIT (methyl isothizolinone) 0.001% green lines and blue dotted lines 0.002%. All experiments were performed in triplicate and completed with tests at higher and lower concentrations (not shown)