Pseudomonas aeruginosa strain PAO1 and S. aureus strain MS2507 were used in this study. Staphylococcus aureus MS2507 was isolated from the blood culture of a patient and was a highly biofilm-forming strain. These strains were cultured in tryptic soy broth (TSB), Luria–Bertani (LB; 1% Bacto tryptone, 0.5% Bacto yeast extract, pH 7.2% and 1.0% NaCl) or on LB agar plates overnight at 37 °C before use.
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