Antibiotic susceptibility testing using minimum inhibitory concentration (MIC) assays
2024
Nikol Kadeřábková | Ayesha J. S. Mahmood | Despoina A. I. Mavridou
Abstract Antimicrobial resistance is due to genetic changes that allow bacteria to evade antibiotic treatment. Antimicrobial susceptibility testing is critical for the detection of antibiotic-resistant strains, the selection of effective therapeutic strategies against bacterial infections, and the evaluation of the efficacy of novel antimicrobials. Among the variety of clinical microbiology methods used for antibiotic susceptibility testing, minimum inhibitory concentration (MIC) assays have become the gold standard in clinical practice. MIC assays determine the lowest concentration of an antimicrobial agent that is required to inhibit visible bacterial growth in vitro. Here, we outline MIC assay protocols, in strict accordance with European Committee on Antimicrobial Susceptibility Testing (EUCAST) guidelines that aim to assess the susceptibility of non-fastidious organisms to antimicrobial agents. The protocols described in this methods paper are intended to aid the performance of reliable and informative MIC assays for research purposes that are in line with clinical microbiology practices.
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