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Differences in pH and the effect on survival of Staphylococcus epidermidis. a pH values of solutions (PBS) and Müller Hinton (MH) media. Highest tested concentration of gentamicin (GS; 0.5 mg per mL) is shown. b Survival of bacteria in a 48-h biofilm after incubation in PBS (top panel) or medium (lower panel) under pH values as induced by gentamicin sulfate for 24 h
