Which term is a disk diffusion test used to determine antibiotic susceptibility?

Which term is a disk diffusion test used to determine antibiotic susceptibility?

• A. Bacteriostatic
• B. Minimum Inhibitory Concentration (MIC)
• C. Kirby-Bauer Test
• D. Bactericidal

Answer: (A)

Disk diffusion tests assess antibiotic susceptibility by placing antibiotic-impregnated disks on a plate inoculated with the bacteria and measuring zones where growth is inhibited. The standardized version of this method is the Kirby-Bauer Test, specifically used to determine how susceptible an organism is to various antibiotics by the size of those inhibition zones. This differs from MIC, which finds the smallest drug concentration that prevents growth in dilution methods, and from terms like bacteriostatic or bactericidal, which describe the drugs’ effect on bacteria rather than the testing method itself. So the term for a disk diffusion test to determine antibiotic susceptibility is Kirby-Bauer Test.

Disk diffusion tests assess antibiotic susceptibility by placing antibiotic-impregnated disks on a plate inoculated with the bacteria and measuring zones where growth is inhibited. The standardized version of this method is the Kirby-Bauer Test, specifically used to determine how susceptible an organism is to various antibiotics by the size of those inhibition zones. This differs from MIC, which finds the smallest drug concentration that prevents growth in dilution methods, and from terms like bacteriostatic or bactericidal, which describe the drugs’ effect on bacteria rather than the testing method itself. So the term for a disk diffusion test to determine antibiotic susceptibility is Kirby-Bauer Test.