Fig. 1

Antimicrobial activity of the AgNPs at different concentrations in combination with blue light against MRSA isolates. Cell suspensions were exposed to either the silver compound alone at sub-MICs (a 1/2, b 1/4, c 1/8, and d 1/16 MIC), or blue light alone at 460 nm and 250 mW for 1 h, or combination of both agents. Viable colony count was recorded as mean ± SD of three independent experiments. AgNPs silver nanoparticles, CFU colony forming unit, MIC minimum inhibitory concentration, SD standard deviation