Figure 3.

Antibacterial activity of silver evaluated by means of the agar diffusion method. Activity of silver lactate and silver saccharinate in alginate beads against (a) S. epidermidis and (b) P. aeruginosa. Activity of silver lactate and silver saccharinate in collagen beads against (c) S. epidermidis and (d) P. aeruginosa. In (a,b) * p < 0.05 compared to the corresponding higher concentration of silver salt (Bonferroni post hoc test). In (c,d) * p < 0.05 compared to the 150 mM concentrations of silver salt (Bonferroni post hoc test). Bars in the graphs indicate standard errors.