Infection Prevention and Control
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
What is the primary goal of infection prevention and control in
healthcare settings?
A. Eliminate all microorganisms from the environment
B. Reduce the risk of healthcare-associated infections
C. Prevent patients from receiving antibiotics
D. Restrict visitors from healthcare facilities
Answer: B. Reduce the risk of healthcare-associated infections
Rationale: The central purpose of infection prevention and control is to
prevent or reduce transmission of infectious agents and thereby
decrease healthcare-associated infections among patients, healthcare
workers, and visitors.
Which microorganism is classified as a bacterium?
A. Candida albicans
B. Influenza virus
C. Escherichia coli
D. Plasmodium species
Answer: C. Escherichia coli
Rationale: Escherichia coli is a bacterium commonly found in the
intestinal tract and can cause urinary tract infections, bloodstream
infections, and other illnesses.
,Which action is considered the single most important routine measure
for preventing transmission of infection?
A. Wearing a surgical mask continuously
B. Hand hygiene
C. Using sterile gloves for every procedure
D. Administering prophylactic antibiotics
Answer: B. Hand hygiene
Rationale: Hand hygiene removes or reduces microorganisms on the
hands and interrupts transmission between patients, healthcare
workers, equipment, and environmental surfaces.
Which type of precautions are applied to every patient regardless of
suspected or confirmed infection?
A. Contact precautions
B. Droplet precautions
C. Airborne precautions
D. Standard precautions
Answer: D. Standard precautions
Rationale: Standard precautions are used for all patients and are based
on the principle that blood, body fluids, nonintact skin, and certain
mucous membranes may contain transmissible infectious agents.
Which microorganism requires a host cell to reproduce?
A. Virus
B. Bacterium
C. Fungus
D. Protozoan
Answer: A. Virus
,Rationale: Viruses lack the cellular structures necessary for
independent reproduction and must enter living host cells to replicate.
Which term describes an infection acquired during the course of
receiving healthcare?
A. Community infection
B. Healthcare-associated infection
C. Congenital infection
D. Opportunistic colonization
Answer: B. Healthcare-associated infection
Rationale: A healthcare-associated infection is an infection associated
with receiving healthcare and may develop in hospitals, clinics, long-
term-care facilities, or other healthcare environments.
Which link in the chain of infection represents the person or animal in
which an infectious agent normally lives and multiplies?
A. Reservoir
B. Portal of exit
C. Mode of transmission
D. Susceptible host
Answer: A. Reservoir
Rationale: The reservoir is the natural habitat where an infectious
organism normally lives, grows, and may reproduce.
Which component of the chain of infection provides the pathway
through which an organism leaves its reservoir?
A. Portal of entry
B. Portal of exit
, C. Susceptible host
D. Reservoir
Answer: B. Portal of exit
Rationale: A portal of exit is the route by which an infectious agent
leaves its reservoir, such as respiratory secretions, blood, feces, urine,
or wound drainage.
Which is an example of a portal of entry?
A. Respiratory tract
B. Sterile dressing
C. Environmental surface
D. Clean glove
Answer: A. Respiratory tract
Rationale: The respiratory tract can serve as a portal of entry when
infectious organisms are inhaled or introduced through respiratory
droplets or aerosols.
Which person is considered a susceptible host?
A. A person with effective immunity to an organism
B. A person who cannot become infected
C. A person whose defenses are insufficient to prevent infection
D. A disinfected environmental surface
Answer: C. A person whose defenses are insufficient to prevent
infection
Rationale: A susceptible host has characteristics or conditions that
make infection more likely, such as impaired immunity, extremes of
age, chronic illness, or breaks in protective barriers.
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
What is the primary goal of infection prevention and control in
healthcare settings?
A. Eliminate all microorganisms from the environment
B. Reduce the risk of healthcare-associated infections
C. Prevent patients from receiving antibiotics
D. Restrict visitors from healthcare facilities
Answer: B. Reduce the risk of healthcare-associated infections
Rationale: The central purpose of infection prevention and control is to
prevent or reduce transmission of infectious agents and thereby
decrease healthcare-associated infections among patients, healthcare
workers, and visitors.
Which microorganism is classified as a bacterium?
A. Candida albicans
B. Influenza virus
C. Escherichia coli
D. Plasmodium species
Answer: C. Escherichia coli
Rationale: Escherichia coli is a bacterium commonly found in the
intestinal tract and can cause urinary tract infections, bloodstream
infections, and other illnesses.
,Which action is considered the single most important routine measure
for preventing transmission of infection?
A. Wearing a surgical mask continuously
B. Hand hygiene
C. Using sterile gloves for every procedure
D. Administering prophylactic antibiotics
Answer: B. Hand hygiene
Rationale: Hand hygiene removes or reduces microorganisms on the
hands and interrupts transmission between patients, healthcare
workers, equipment, and environmental surfaces.
Which type of precautions are applied to every patient regardless of
suspected or confirmed infection?
A. Contact precautions
B. Droplet precautions
C. Airborne precautions
D. Standard precautions
Answer: D. Standard precautions
Rationale: Standard precautions are used for all patients and are based
on the principle that blood, body fluids, nonintact skin, and certain
mucous membranes may contain transmissible infectious agents.
Which microorganism requires a host cell to reproduce?
A. Virus
B. Bacterium
C. Fungus
D. Protozoan
Answer: A. Virus
,Rationale: Viruses lack the cellular structures necessary for
independent reproduction and must enter living host cells to replicate.
Which term describes an infection acquired during the course of
receiving healthcare?
A. Community infection
B. Healthcare-associated infection
C. Congenital infection
D. Opportunistic colonization
Answer: B. Healthcare-associated infection
Rationale: A healthcare-associated infection is an infection associated
with receiving healthcare and may develop in hospitals, clinics, long-
term-care facilities, or other healthcare environments.
Which link in the chain of infection represents the person or animal in
which an infectious agent normally lives and multiplies?
A. Reservoir
B. Portal of exit
C. Mode of transmission
D. Susceptible host
Answer: A. Reservoir
Rationale: The reservoir is the natural habitat where an infectious
organism normally lives, grows, and may reproduce.
Which component of the chain of infection provides the pathway
through which an organism leaves its reservoir?
A. Portal of entry
B. Portal of exit
, C. Susceptible host
D. Reservoir
Answer: B. Portal of exit
Rationale: A portal of exit is the route by which an infectious agent
leaves its reservoir, such as respiratory secretions, blood, feces, urine,
or wound drainage.
Which is an example of a portal of entry?
A. Respiratory tract
B. Sterile dressing
C. Environmental surface
D. Clean glove
Answer: A. Respiratory tract
Rationale: The respiratory tract can serve as a portal of entry when
infectious organisms are inhaled or introduced through respiratory
droplets or aerosols.
Which person is considered a susceptible host?
A. A person with effective immunity to an organism
B. A person who cannot become infected
C. A person whose defenses are insufficient to prevent infection
D. A disinfected environmental surface
Answer: C. A person whose defenses are insufficient to prevent
infection
Rationale: A susceptible host has characteristics or conditions that
make infection more likely, such as impaired immunity, extremes of
age, chronic illness, or breaks in protective barriers.
