Four antibiotics have the following levels of susceptibility to an organism caus

Question

Four antibiotics have the following levels of susceptibility to an organism causing a urinary tract infection. Drug Zone of Inhibition Zone of Inhibition Zone of Inhibition size when Resistantsize when Intermeiate ize when Susceptible c6 16 The organism was grown in pure culture and lawns of the organism were tested with Etest strips. Following appropriate incubation, the edge of the zone of inhibition was recorded as follows. Drug Zone of Inhibition cm 64 Which antibiotic would you choose to treat this urinary tract infection and why? Multiple Choice Antibiotic C because the zone of inhibition is dramatically smaller than when the organism is considered susceptible. Antibiotic A because the zone of inhibition is significantly larger than when the organism is considered resistant. Antibiotic D because the zone of inhibition is just barely smaller than when the organism is considered susceptible Antibiotic B because the zone of inhibition is smaller than when the organism is considered resistant.

Explanation / Answer

I would use antibiotic D because the zone of inhibition is just barely smaller than when the organism is considered susceptible.

I would not use C because it is too much lower than the susceptible range so it might also affect other microorganisms present inside the body and might cause more problem.

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