The disk-diffusion method was used to evaluate the effectiveness of three antibiotics on bacterial growth. The results were as follows:
Antibiotic Zone of inhibition
X 6 mm
Y 11 mm
Z 21 mm
a. Which antibiotic was the most effective against the microorganism? Why? (2 pts)
Answer below:
Antibiotic Z is the most effective antibiotics against the microorganism because the zone of inhibition is greater than antibiotic X and Y. According to question one, the zone of inhibition prevents the bacterium from growing thus if the zone of inhibition has a greater zone that means that the bacterium is susceptible to the antibiotic.
b. Which antibiotic would you recommend for treatment of a disease caused by this bacterium? Why?