Final answer:
The Kirby-Bauer disk diffusion test is the standard tool used for measuring the effectiveness of antimicrobics against pathogenic microorganisms. It involves placing filter paper disks impregnated with known amounts of antibacterial drugs on an agar plate inoculated with a bacterial lawn.
Step-by-step explanation:
The standard tool used for measuring the effectiveness of antimicrobics against pathogenic microorganisms, often referred to as the disk diffusion test, is called the Kirby-Bauer disk diffusion test. This test is a widely used method in clinical laboratories to assess the antimicrobial activity of chemical agents. It involves placing filter paper disks impregnated with known amounts of antibacterial drugs on an agar plate inoculated with a bacterial lawn. The diameter of the zone of inhibition, measured in millimeters, determines the susceptibility or resistance of the bacterial pathogen to the drug.