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Epidemiology Questions and Correct Answers/ Latest Update / Already Graded

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Transient microbiota differ from normal microbiota in that transient microbiota a. Cause diseases b. Are found in a certain location on the host c. Are acquired by direct contact d. Are present for a relatively short time Ans: d. Are present for a relatively short time In parasitism, a. Both organisms benefit b. One organism benefits, and the other is unaffected c. Both organisms are unaffected d. One organism benefits at the expense of the other Ans: d. One organism benefits at the expense of the other The fact that normal microbiota can benefit the host by preventing the overgrowth of harmful microorganisms is called a. Microbial antagonism All rights reserved © 2025/ 2026 | Page | 2 b. Symbiosis c. Mutualism d. Commensalism Ans: a. Microbial antagonism In commensalism, a. Both organisms benefit b. One organism benefits, and the other is unaffected c. Both organisms are unaffected d. One organism benefits at the expense of the other Ans: b. One organism benefits, and the other is unaffected If the normal microbiota are eliminated (by antibiotics, for example), it can result in a. Fewer diseases b. Normal microbiota returning immediately c. Increased susceptibility to disease d. No bacterial growth Ans: c. Increased susceptibility to disease

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Epidemiology Questions and Correct
Answers/ Latest Update / Already Graded
Transient microbiota differ from normal microbiota in that transient
microbiota

a. Cause diseases

b. Are found in a certain location on the host

c. Are acquired by direct contact

d. Are present for a relatively short time

Ans: d. Are present for a relatively short time


In parasitism,

a. Both organisms benefit

b. One organism benefits, and the other is unaffected

c. Both organisms are unaffected

d. One organism benefits at the expense of the other

Ans: d. One organism benefits at the expense of the other


The fact that normal microbiota can benefit the host by preventing the
overgrowth of harmful microorganisms is called

a. Microbial antagonism

All rights reserved © 2025/ 2026 |

, Page |2

b. Symbiosis

c. Mutualism

d. Commensalism

Ans: a. Microbial antagonism


In commensalism,

a. Both organisms benefit

b. One organism benefits, and the other is unaffected

c. Both organisms are unaffected

d. One organism benefits at the expense of the other

Ans: b. One organism benefits, and the other is unaffected


If the normal microbiota are eliminated (by antibiotics, for example), it
can result in

a. Fewer diseases

b. Normal microbiota returning immediately

c. Increased susceptibility to disease

d. No bacterial growth

Ans: c. Increased susceptibility to disease



All rights reserved © 2025/ 2026 |

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