You perform a KirbyBauer assay with two antibiotics Antibiot

You perform a Kirby-Bauer assay with two antibiotics. Antibiotic X has a zone of inhibition of 19 mm. Antibiotic Y has a zone of inhibition of 17 mm. Which better at killing this particular microorganism? Antibiotic X because it has a larger zone Antibiotic Y because it has a smaller zone Antibiotic X and Y, which have identical antimicrobial activities It is impossible to tell from the information given

Solution

Antibiotic X because it has a larger some.

Clinicians can use KB test results to choose appropriate antibiotics to combat a particular infection in a patient. Administering antibiotics that specifically target the particular bacteria that are causing the infection can avoid using broad-spectrum antibiotics, which target many types of bacteria. Thus, clinical application of KB testing results can decrease the frequency with which antibiotic-resistant bacteria evolve.