Fig. 4
Effect of oxytetracycline hydrochloride with and without lysozyme-EDTA (at IC50) on planktonic Lactobacillus rhamnosus GG at pH 7.5. OD600 of negative control (oxytetracycline hydrochloride) = 0.32, OD600 of 700 μg/mL of oxytetracycline hydrochloride with lysozyme-EDTA (at IC50) = 0.38. 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)