The measurement is usually carried out on planktonic bacteria (free floating). The MIC value can be determined based on the optical density based on the use of a spectrophotometer or disk diffusion method. This is a time and cost saving strategy for screening and identifying promising drug candidates. The assay can also be adjusted to determine the minimum test concentration required to inhibit the growth of a group of test isolates (MIC50 and MIC90) that are 50% or 90%. https://antiviral.creative-diagnostics.com/minimum-inhibitory-concentration.html