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Questions and Answers
Which of the following statements is true regarding pathogenicity and virulence?
Which of the following statements is true regarding pathogenicity and virulence?
- Pathogenicity and virulence are uniform properties of a given pathogen.
- Pathogenicity and virulence are not related to each other.
- Virulence is the measure of pathogenicity. (correct)
- Virulence factors are not produced by the pathogen.
How can virulence be estimated?
How can virulence be estimated?
- By measuring the number of cells required to kill 100 percent of the population.
- By measuring the number of cells required to kill 10 percent of the population.
- By measuring the number of cells required to kill 25 percent of the population.
- By measuring the number of cells required to kill 50 percent of the population. (correct)
What are virulence factors?
What are virulence factors?
- Substances produced by the host that enhance invasiveness and host damage
- Substances produced by the pathogen that inhibit invasiveness and host damage
- Substances produced by the pathogen that enhance invasiveness and host damage (correct)
- Substances produced by the host that inhibit invasiveness and host damage
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