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Antibacterial activities of different treatments in vitro. (a) CFUs of MRSA on plates after various treatments and with or without laser irradiation (600 nm, 100 mW/cm2). (b) Bacterial viability analysis based on CFUs. (c) Confocal images of bacterial intracellular ROS fluorescence intensity. (d) The relative ROS level detected by a microplate reader (488/525 nm). ***: a statistically significant difference between groups, p < 0.001.
