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Test Bank (Complete Download) For Textbook of Diagnostic Microbiology 6th Edition by Mahon ISBN: 9780323482189 Instantly Downloadable Test Bank

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Test Bank (Complete Download) For Textbook of Diagnostic Microbiology 6th Edition by Mahon ISBN: 9780323482189 Instantly Downloadable Test Bank

Chapter 02: Host–Parasite Interaction
Mahon: Textbook of Diagnostic Microbiology, 6th Edition
MULTIPLE CHOICE
1. Organisms that participate in a biological relationship where both benefit from one another are
called
a. parasites.
b. symbionts.
c. hosts.
d. flora.
ANS: B
Symbiosis is a relationship where two organisms live together and their association benefits
both organisms. Organisms that live in symbiosis are said to be symbionts. Parasites are
organisms that live off a host and harm the host. The host is the organism that provides the
nutrients to the other organisms. Flora are described as microorganisms that inhabit the body
sites of healthy individuals.
OBJ: Level 1: Recall
2. Parasitism is
a. a biological relationship between two or more organisms in which both benefit
from one another.
b. a biological relationship between only two organisms in which there are no
beneficial or harmful effects to the host.
c. a biological relationship in which one species gains benefits at the expense of the
host.
d. a synonym for mutualism.
ANS: C
When both organisms live together and one organism benefits at the expense of the host, this
is parasitism. When both organisms live together and both benefit, this is symbiosis. When
both organisms live together and neither benefits, this is commensalism. Mutualism and
symbiosis are synonyms.
OBJ: Level 1: Recall
3. This bacterial state occurs when a host harbors a disease-causing organism, but does not show
signs of disease.
a. Carrier
b. Transient
c. Resident
d. Indigenous
ANS: A
Transient, resident, and indigenous refer to particular types of flora associated with the human
body, whereas carrier refers to the state in which pathogenic organisms establish themselves
in a host without causing disease, but the host can still transmit the infection.

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