The Relationship Between Agar Thickness and Antimicrobial Susceptibility Testing

摘要

Antimicrobial susceptibility testing can be done using solid or liquid-based medium. Solid-based assays are easy and inexpensive; they are limited by not being as quantitative as liquid-based assays. Agar depth can influence the accuracy of plate-based assays and it is assumed the basis of this effect is antimicrobial agent diffusion. We tested this assumption by using ETEST^® to quantitate the relationship between agar depth and minimum inhibitory concentration and zone of inhibition.