Diffusion and dilution tests in which pathogens expose toantimicrobials are designed to ______.
A. determine the spectrum of action of a drug
B. determine which drug is most effective against a particular pathogen
C. determine the amount of a drug to use against a particular pathogen
D. both b and c
In a Kirby-Bauer susceptibility test, the presence of a zone of inhibition around disks containing antimicrobial agents indicates __________.
A. that the microbe does not grow in the presence of the agents
B. that the microbe grows well in the presence of the agents
C. the smallest amount of the agent that will inhibit the growth of the microbe
D. the minimum amount of an agent that kills the microbe in test.
Rifampin treat infection of M. tuberculosis by inhibiting ____.
A. DNA polymerase,
B. DNA gyrase,
C. RNA polymerase
DNA ligase.
Quinolones are active against prokaryotic DNA specifically byinhibiting ______, an enzyme for uncoiling of replicatingbacterial DNA?
A. DNA polymerase,
B. DNA gyrase,
C. RNA polymerase
DNA ligase.
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