Fig. 10From: A synergistic bactericidal effect of low-frequency and low-intensity ultrasound combined with levofloxacin-loaded PLGA nanoparticles on M. smegmatis in macrophagesApoptosis and necrosis ratio of the RAW264.7 cells determined using flow cytometry after double staining with Annexin-V/PI. The upper right quadrant indicates early apoptotic cells; the lower right quadrant indicates late apoptotic cells; the upper left quadrant indicates necrotic cells; and the lower-left quadrant indicates normal cellsBack to article page