Question

multiple choice question
in this image of a kirby - bauer test, the zone of inhibition is greatest for the antibiotic

yxin b
etracycline
vancomycin

○ vancomycin
○ tetracycline
○ polymyxin b

Explanation:

To determine the antibiotic with the greatest zone of inhibition in a Kirby - Bauer test, we visually compare the zones around each antibiotic disc. From the given options (vancomycin, tetracycline, polymyxin B) and the labels above (polymyxin B, tetracycline, vancomycin), we assume the zone for polymyxin B is the largest (based on typical visual analysis of such tests where we look for the biggest clear area around the disc).

Answer:

polymyxin B (the option with "polymyxin B" text, assuming its zone of inhibition is the greatest visually)