The Amount of Agar in Antimicrobic Disk Susceptibility Test Plates

Abstract
Using two standardized disk diffusion susceptibility tests, die effects of altering the depth of the agar medium were studied. Such alterations were found to have a significant although minor influence on the sizes of the zones of inhibition. A recommendation for standardizing both disk diffusion technics by using agar plates containing media approximately 4 mm. in depth is made.

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