Antibiotic Sensitivity Discs are used for in-vitro antimicrobial susceptibility testing to guide appropriate antibiotic selection and monitor emerging resistance patterns. The discs are applied in the disc diffusion method, where the diameter of the inhibition zone is inversely related to the minimum inhibitory concentration (MIC) of the tested organism. This method provides a simple, reliable, and standardized approach for assessing bacterial sensitivity to antimicrobial agents.