Antibiotic Effectiveness: MICs, Time- and Concentration-Dependent Antibiotics


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Which method would you use to see if an antibiotic was bactericidal or bacteriostatic?

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1. Which of the following is why a doctor would NOT test a microbe's antibiotic susceptibility?

2. What is a zone of inhibition?

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About This Quiz & Worksheet

This quiz and corresponding worksheet will help you gauge your understanding of the factors leading to the effectiveness of antibiotics. Topics you'll need to know to pass the quiz include antibiotic susceptibility and the different types of tests used to measure it.

Quiz & Worksheet Goals

Use these assessment tools to assess your knowledge of:

  • The test that determines if an antibiotic is bactericidal or bacteriostatic
  • The main reasons a doctor would test a microbe's antibiotic susceptibility
  • The zone of inhibition
  • The primary characteristics of the E Test
  • The kind of antibiotic that's only effective in very high concentrations

Skills Practiced

This worksheet and quiz will let you practice the following skills:

  • Defining key concepts - ensure that you can accurately define main phrases, such as time-dependent and concentration-dependent
  • Reading comprehension - ensure that you draw the most important information from the related lesson on the factors of antibiotic effectiveness
  • Interpreting information - verify that you can read information regarding antibiotic susceptibility tests and interpret it correctly

Additional Learning

To learn more about antibiotics, review the corresponding lesson on Factors of Antibiotic Effectiveness. This lesson covers the following topics:

  • Know how to conduct the Disk-Diffusion Test/Kirby-Bauer Test and understand its purpose
  • Identify the zone of inhibition
  • Understand how the E Test works and recognize its advantages
  • Define Minimal Inhibitory Concentration (MIC) and Minimal Bactericidal Concentration (MBC)
  • Explore the Broth Dilution Test
  • Differentiate between time-dependent and concentration-dependent antibiotics
  • Define drug antagonism and drug synergy