Average inhibition diameter (mm) and antimicrobial susceptibility level

Average inhibition zone diameters and susceptibility of all isolates to each antimicrobial agent, as determined by the agar disk diffusion method and comparison with CLSI charts. As mentioned in the Materials and Methods section, many breakpoints are not available for some antimicrobial agents and microorganisms, and the susceptibility thus remains unknown. However, isolates showing no inhibition halo were considered resistant and those with an inhibition diameter of at least 27 mm were considered susceptible