Fig. 3

Evaluation of antibacterial activity using fluorescence microscopy and SEM on MRSA cells (control) and MRSA treated with two sub-inhibitory concentrations of SeTeNPs: Se 74.9 mg/L; Te 132.0 mg/L and Se 37.4 mg/L; Te 66.0 mg/L. The live and dead MRSA cells were visualized using green dye SYTO and dead cells using red dye PI. The scale bar for fluorescence microscopy is 100 µm. The scale bar for SEM micrographs is 1 µm. The brightness and contrast were processed equally across all micrographs