Antibacterial effects of lauryl-PLL against multiresistant bacterial strains. The average inhibition area (cm2) of lauryl-PLL is shown at the concentration of linked lauric acid, M. 5 Gram-negative and 2 Gram-positive multiresistant strains were tested and revealed the antibacterial effect of lauryl-PLL. The number following the name of bacteria (Enterobacter cloacae and Klebsiella pneumoniae) denotes the number of multiresistant strains tested.