Figure 1. The Effect of Benzalkonium Chloride on Planktonic Growth and Biofilm Formation.

Plates were inoculated with the bacterial suspensions (turbidity of 0.5 McFarland) with benzalkonium chloride at different concentrations and incubated at 37°C for 24 hours with an OD of 630 nm. Data are expressed as the mean of three separate experiments in triplicate (± SD) (* P < 0.05).* Indicates a statistically significant difference from the previous column.