Louisiana State University:NUR 2134 Quiz Questions & Answers for Chapters 83-89 and 91 ,100% CORRECT
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Louisiana State University:NUR 2134 Quiz Questions & Answers for Chapters 83-89 and 91
An antimicrobial medication that has selective toxicity has which characteristic?
A. Ability to transfer DNA coding
B. Ability to suppress bacterial resistance
C. Ability to avoid injuring host cells
D. Abi...
louisiana state universitynur 2134 quiz questions amp answers for chapters 83 89 and 91
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Louisiana State University:NUR 2134 Quiz Questions & Answers for
Chapters 83-89 and 91
An antimicrobial medication that has selective toxicity
has which characteristic?
A. Ability to transfer DNA coding
B. Ability to suppress bacterial resistance
C. Ability to avoid injuring host cells
D. Ability to act against a specific microbe
C. Ability to avoid injuring host cells
Selective toxicity refers to an antibiotic that has the ability to injure only invading
microbes, not the host. Conjugation is the process through which DNA coding for
drug resistance is transferred from one bacterium to another. Antibiotics do not
suppress bacterial resistance, but rather promote the emergence of drug-
resistant microbes. Antibiotics that are narrow spectrum are active against only a
few microbes.
The development of a new infection as a result of the elimination of normal flora
by an antibiotic is referred to as what?
A. Resistant infection
B. Superinfection
C. Nosocomial infection
D. Allergic reaction
B. Superinfection
Antibiotic therapy can destroy the normal flora of the body, which normally
would inhibit the overgrowth of fungi and yeast. When the normal flora is
decreased, these organisms can overgrow and cause a new infection, or
superinfection.
A microbe acquires antibiotic resistance by which means?
A. Development of medication resistance in the host
B. Over-riding of the minimum bactericidal concentration
,C. Incorrect dosing, which contributes to ribosome mutations
D. Transfer of DNA coding to other bacteria
D. Transfer of DNA coding to other bacteria
All alterations in structure and function result from changes in the microbial
genome. The microbe, not the host, becomes medication resistant. Genetic
changes in a microbe result either from spontaneous mutation or from acquisition
of DNA from conjugation with other bacteria. The minimum bacterial
concentration (MBC) is used in testing for drug sensitivity. Incorrect dosing does
not lead to microbe mutations.
The nurse identifies which host factor as the most important when choosing an
antimicrobial drug?
A. Age
B. Competent immune function
C. Genetic heritage
D. Previous medication reactions
,B. Competent immune function
Two factors—host defenses and the site of infection—are unique to the selection
of antibiotics. It is critical for success that antibiotics act synergistically with the
immune system to subdue infection. Other host factors, such as age, genetic
heritage, and previous drug reactions, are the same factors that must be
considered when choosing any other medication.
What is the minimum bactericidal concentration (MBC)?
A. The lowest concentration of an antibiotic needed to suppress bacterial growth
completely
B. The lowest concentration of an antibiotic needed to reduce the number of
bacterial colonies by 99.9%
C. The lowest concentration of an antibiotic needed to produce effects
D. The lowest dose of an antibiotic needed to eradicate bacteria
B. The lowest concentration of an antibiotic needed to reduce the number of
bacterial colonies by 99.9%
The MBC is the lowest concentration of drug that produces a 99.9% decline in
the number of bacterial colonies (indicating bacterial kill). The lowest
antibiotic concentration needed to suppress bacterial growth or to produce
effects and the lowest antibiotic dose needed to eradicate bacteria are
incorrect descriptions of MBC.
Which test is the most widely used method for assessing drug sensitivity?
A. Minimum inhibitory concentration (MIC)
B. Minimum bacterial concentration (MBC)
C. Broth dilution
D. Disk diffusion
D. Disk diffusion
The most widely used method for assessing drug sensitivity is the disk diffusion
test, also known as the Kirby-Bauer test. Through diffusion, an antibiotic-
, containing zone becomes established around each disk. As the bacteria
proliferate, growth is inhibited around the disks that contain an antibiotic to
which the bacteria are sensitive.
A nurse removes a central line access device once the patient no longer requires
intravenous (IV) antibiotics. This action is an example of which strategy to prevent
antimicrobial resistance established by the Centers for Disease Control and
Prevention (CDC)?
A. Preventing transmission
B. Proper diagnosis
C. Preventing infection
D. Prudent antibiotic use
C. Preventing infection
The CDC's campaign to prevent the development of antimicrobial resistance in
hospitals focuses on four approaches: (1) prevent infection, (2) diagnose and
treat infection effectively, (3) use antimicrobials wisely, and (4)
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