Which microbiological parameter is assessed by the Kirby-Bauer disk diffusion method?
Answer and explanation
Correct answer: A. In vitro antibiotic susceptibility of bacterial isolates
- Step 1: The Kirby-Bauer disk diffusion technique is a standardized laboratory assay used in diagnostic clinical microbiology.
- Step 2: By measuring the diameter of the clear zone of bacterial growth inhibition surrounding antibiotic-impregnated paper disks on Mueller-Hinton agar, the assay determines the in vitro antibiotic susceptibility profile of bacterial isolates.
Answer
In vitro antibiotic susceptibility of bacterial isolates.
Why not the others: Viral load quantification measures viral genomic copy numbers via quantitative PCR, serum antibody titer measures host humoral immune response, and cell wall lipid analysis assesses acid-fast staining characteristics.
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