Establishment of Disease: Entry, Dose & Virulence

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question 1 of 3

The number of microbes necessary to infect a host in 50% of a sample population is known as _____.

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1. The number of microbes necessary to kill 50% of a population infected with that microbe is known as _____.

2. _____ refers to the degree of pathogenicity of a microbe.

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About This Quiz & Worksheet

You can use the practice questions in this quiz/worksheet combo to assess your understanding of disease-causing infections and how lethal and infectious some pathogens are. Topics tested in the quiz include the degree of pathogenicity of a microbe and the ability of a microbe to cause disease.

Quiz & Worksheet Goals

This quiz will test your knowledge of:

  • The terms used to describe the following:
    • The number of microbes needed to infect a host in 50% of a sample population
    • The number of microbes needed to kill 50% of an infected population
    • The degree of pathogenicity of a microbe
    • The ability of a microbe to cause disease
  • The words used to describe the terms 'virulence' and 'pathogenicity'

Skills Practiced

  • Interpreting information - verify that you can read information regarding lethal and infectious doses when measuring virulence and interpret it correctly
  • Distinguishing differences - compare and contrast pathogenicity and virulence
  • Information recall- access the knowledge you've gained regarding pathogenicity of a microbe

Additional Learning

To learn more about this subject, review the accompanying lesson called Establishment of Disease: Entry, Dose & Virulence. Objectives this lesson will help you accomplish include:

  • Define pathogenicity and explain what type of term it is
  • Discuss the term virulence
  • List and describe two ways in which virulence is measured
  • Indicate ways that a microbe can enter a host
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