The lowest concentration of a drug that prevents growth of a microorganism is the

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The minimum inhibitory concentration (MIC) is the lowest concentration of a drug that prevents growth of a microorganism. It is a measure of the effectiveness of an antimicrobial agent against a particular microorganism. The other options are incorrect: infectious effective dose is the number of microorganisms required to establish an infection in a host, lethal dose is the amount of a drug or toxin that causes death, most effective concentration and minimal death dose are not commonly used terms in microbiology.

The Lowest Concentration of a Drug That Prevents Growth of a Microorganism