The Term "Zone of Inhibition" is Used in Which of the Following

Question

The term "zone of inhibition" is used in which of the following procedures?
A)Use-dilution test
B)Growth inhibition test
C)Disk-diffusion test
D)Multiple inhibition test

Accepted Answer

Zone of inhibition is a term used in the disk diffusion test, which measures the effectiveness of antimicrobial agents against a particular organism. In this test, a disk containing a specific concentration of an antimicrobial agent is placed on an agar plate that has been inoculated with the organism being tested. If the agent is effective, a clear area of no growth (zone of inhibition) will appear around the disk. The use-dilution test and multiple inhibition tests are also used to measure the effectiveness of antimicrobial agents, but they do not use the term "zone of inhibition." The growth inhibition test is a broad term used to describe any test in which the growth of microorganisms is measured, but it does not specifically refer to the disk diffusion test.