Fig. 2

Double combination of AgNPs with the amoxicillin, vancomycin, linezolid, azithromycin or clarithromycin against ten MRSA isolates. The combination was assessed by the checkerboard method and the response was evaluated by calculation of the fraction inhibitory index (FIC) as follow: synergistic if the FIC index is 0.5 or less, indifference if the FIC index more than 0.5 and less than four, and antagonistic if the FIC index more than four. AgNPs silver nanoparticles, AMX amoxicillin, AZM azithromycin, CLR clarithromycin, LNZ linezolid, VAN vancomycin