English: Minimum Inhibitory Concentration: Tube Dilution Assay is performed by constantly increasing the percent concentration of antimicrobial agent to microbial rich broth in a series of tubes. It is used to measure the Minimum Inhibitory Concentration [MIC] of an antimicrobial agent, which is the lowest concentration of antimicrobial agent that will inhibit the growth of microbes. The turbidity of the tubes indicates the amount of microbe growth, with the least turbid, or clear, tubes (tubes 6 and 7) correlating with the absence of microbes. The tube with no antimicrobial agent (tube 1) presents as opaque and most turbid because the microbes are able to flourish. As antimicrobial concentration increases, the turbidity decreases until the MIC is reached and microbes can no longer survive. Antimicrobials with low MICs are more effective than those with high MICs, as only a low dosage is necessary to eradicate microbes.