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Effect of the different concentrations of the 2 antibiotics and the 4 peptides against A. actinomycetemcomitans. Bacterial suspensions were incubated with 1, 5, 10, 20, 40 and 50 μM of each agent and processed as described in materials and methods. Data are the mean ± SD of triplicates from three independent experiments. *P < 0.01 compared with both MH and DOX, #P < 0.01 compared with other peptides, +P < 0.05 compared with MH.
