Fig. 6
Effect of oxytetracycline hydrochloride with and without lysozyme-EDTA (at IC50) on the planktonic co-culture of Lactobacillus rhamnosus GG and Staphylococcus epidermidis 444. OD600 negative control (oxytetracycline hydrochloride) = 0.32. OD600 of 700 μg/mL of oxytetracycline hydrochloride with lysozyme-EDTA (at IC50) = 0.30. The results are mean values of three replicates. (*) indicates a significant difference (P < 0.05) between each test and the positive control (oxytetracycline hydrochloride). The lowercase letter a indicates a significant difference (P < 0.05) between each test and its preceding. Error bars represent the SD (standard deviation)