Fig. 4

A The survival rate of MRSA after treatment with PBS (PBS-NIR_(-) and PBS-NIR₍₊₎) and different concentrations (7.80, 15.6, 31.3, 62.5, 125 and 250 μg/mL) of NAV (NAV-NIR₍₋₎ and NAV-NIR₍₊₎). B Photographs of colony formation of MRSA corresponding to A. C The survival rate of MRSA after treatment with PBS (PBS-NIR₍₋₎ and PBS-NIR₍₊₎) and different concentrations of NiO NPs (NiO NPs-NIR₍₋₎ and NiO NPs-NIR₍₊₎). D Photographs of colony formation of MRSA corresponding to C. E The survival rate of MRSA after treatment with PBS (PBS-NIR₍₋₎ and PBS-NIR₍₊₎) and different concentrations of AuNPs@Van (AuNPs@Van-NIR₍₋₎ and AuNPs@Van-NIR₍₊₎). (F) Photographs of colony formation of MRSA corresponding to E. G Fluorescence staining images of MRSA in different treatment groups (PBS-NIR₍₋₎, PBS-NIR₍₊₎, NAV-NIR₍₋₎ and NAV-NIR₍₊₎), with live bacteria marked as blue by DAPI and dead bacteria marked as red by PI