Which of the following is NOT true about Kirby-Bauer disk diffusion method?
A. The designation of resistance or sensitivity to a drug is determined by comparing the size of the zone of inhibition to a standard table.
B. As the minimum inhibitory concentration value increases, the sensitivity of the organism to the drug decreases.
C. The diameters of the zones of inhibition are measured to the nearest millimeter.
D. Bacteria used to swab plate a test plate should be at least a week old.
Answer: D
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