The joint action of bactericidal antibiotics and PYOSa. Concentrations of the different antibiotics in μg/mL (RIF 0.02, OXA 3, CIP 0.5, VAN 8, DAP 64, KAN 46), corresponding to minimum bacteriocidal concentrations. (A) The ratio of the change in density of S. aureus after 24 h of exposure to antibiotics, antibiotics and phage, or phage alone. Hash red, the density of S. aureus recovered was below the detection limit, ∼102 per mL. (B) The ratio of the change in the density of PYOSa after 24 h of confronting S. aureus Newman in combination with antibiotics or alone.