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GALEN COLLEGE NUR 155 MICROBIOLOGY
2026 EXAM COMPLETE (100) CURRENT
TESTING QUESTIONS AND CORRECT
ANSWERS WITH DETAILED
EXPLANATIONS|GUARANTEED PASS.
MICROBIOLOGY
Prepare with confidence using this Galen College NUR 155
Microbiology Exam, designed to assess foundational knowledge of
microorganisms and their role in human health. It focuses on
bacterial, viral, fungal, and parasitic organisms, infection control
principles, disease transmission, immune response, and basic
laboratory techniques. The exam strengthens understanding of
microbiology concepts essential for safe nursing practice and
patient care. Suitable for nursing students at Galen College
preparing for microbiology coursework and clinical applications.
MULTIPLE CHOICE.
Domain 1: Chain of Infection & Transmission (Questions 1–
15)
1. A patient with active pulmonary tuberculosis is placed in a
negative-pressure room. Healthcare workers wear N95
respirators when entering. Which component of the chain of
infection is being interrupted?
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• A) Portal of entry
• B) Susceptible host
• C) Method of transmission
• D) Reservoir
*Rationale: Negative-pressure rooms and N95 respirators
interrupt airborne transmission, which is the method of
transmission for tuberculosis.*
2. Which of the following is the correct order of the chain of
infection?
• A) Reservoir → etiologic agent → portal of exit → method of
transmission → portal of entry → susceptible host
• B) Etiologic agent → reservoir → portal of exit → method of
transmission → portal of entry → susceptible host
• C) Etiologic agent → portal of exit → reservoir → method of
transmission → portal of entry → susceptible host
• D) Susceptible host → portal of entry → method of
transmission → portal of exit → reservoir → etiologic agent
Rationale: The chain begins with the etiologic agent (pathogen),
then its reservoir, portal of exit, method of transmission, portal
of entry, and finally the susceptible host.
3. A healthcare worker contracts hepatitis B after a needlestick
injury. The needlestick represents which component of the
chain of infection?
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• A) Portal of exit
• B) Method of transmission
• C) Portal of entry
• D) Reservoir
Rationale: The needlestick is the direct method by which the
virus is transmitted from the infected patient (reservoir) to the
healthcare worker.
4. A patient develops a surgical site infection after surgery. The
wound provides a direct opening for bacteria. This is an example
of:
• A) Reservoir
• B) Portal of exit
• C) Portal of entry
• D) Susceptible host
Rationale: The surgical wound is a break in the skin, serving as a
portal of entry for microorganisms.
5. A nurse fails to wash hands after removing gloves and then
touches another patient. This is an example of:
• A) Direct contact transmission
• B) Indirect contact transmission
• C) Airborne transmission
• D) Vector-borne transmission
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Rationale: The nurse‘s contaminated hands act as a fomite
(intermediate object), transmitting pathogens indirectly to the
second patient.
6. Which of the following is an example of a fomite?
• A) A mosquito
• B) A contaminated doorknob
• C) An infected patient
• D) A sneeze droplet
Rationale: A fomite is an inanimate object that can carry and
transmit infectious agents. A doorknob is a classic example.
7. The single most effective way to break the chain of infection in
a healthcare setting is:
• A) Hand hygiene
• B) Wearing gloves
• C) Using face masks
• D) Sterilizing equipment
Rationale: Hand hygiene is the most basic and effective
measure to prevent transmission of pathogens between
patients and healthcare workers.
8. A patient with influenza coughs and releases droplets into the
air. A nearby visitor inhales these droplets. The droplets
represent which component?
GALEN COLLEGE NUR 155 MICROBIOLOGY
2026 EXAM COMPLETE (100) CURRENT
TESTING QUESTIONS AND CORRECT
ANSWERS WITH DETAILED
EXPLANATIONS|GUARANTEED PASS.
MICROBIOLOGY
Prepare with confidence using this Galen College NUR 155
Microbiology Exam, designed to assess foundational knowledge of
microorganisms and their role in human health. It focuses on
bacterial, viral, fungal, and parasitic organisms, infection control
principles, disease transmission, immune response, and basic
laboratory techniques. The exam strengthens understanding of
microbiology concepts essential for safe nursing practice and
patient care. Suitable for nursing students at Galen College
preparing for microbiology coursework and clinical applications.
MULTIPLE CHOICE.
Domain 1: Chain of Infection & Transmission (Questions 1–
15)
1. A patient with active pulmonary tuberculosis is placed in a
negative-pressure room. Healthcare workers wear N95
respirators when entering. Which component of the chain of
infection is being interrupted?
, Page 2 of 41
• A) Portal of entry
• B) Susceptible host
• C) Method of transmission
• D) Reservoir
*Rationale: Negative-pressure rooms and N95 respirators
interrupt airborne transmission, which is the method of
transmission for tuberculosis.*
2. Which of the following is the correct order of the chain of
infection?
• A) Reservoir → etiologic agent → portal of exit → method of
transmission → portal of entry → susceptible host
• B) Etiologic agent → reservoir → portal of exit → method of
transmission → portal of entry → susceptible host
• C) Etiologic agent → portal of exit → reservoir → method of
transmission → portal of entry → susceptible host
• D) Susceptible host → portal of entry → method of
transmission → portal of exit → reservoir → etiologic agent
Rationale: The chain begins with the etiologic agent (pathogen),
then its reservoir, portal of exit, method of transmission, portal
of entry, and finally the susceptible host.
3. A healthcare worker contracts hepatitis B after a needlestick
injury. The needlestick represents which component of the
chain of infection?
, Page 3 of 41
• A) Portal of exit
• B) Method of transmission
• C) Portal of entry
• D) Reservoir
Rationale: The needlestick is the direct method by which the
virus is transmitted from the infected patient (reservoir) to the
healthcare worker.
4. A patient develops a surgical site infection after surgery. The
wound provides a direct opening for bacteria. This is an example
of:
• A) Reservoir
• B) Portal of exit
• C) Portal of entry
• D) Susceptible host
Rationale: The surgical wound is a break in the skin, serving as a
portal of entry for microorganisms.
5. A nurse fails to wash hands after removing gloves and then
touches another patient. This is an example of:
• A) Direct contact transmission
• B) Indirect contact transmission
• C) Airborne transmission
• D) Vector-borne transmission
, Page 4 of 41
Rationale: The nurse‘s contaminated hands act as a fomite
(intermediate object), transmitting pathogens indirectly to the
second patient.
6. Which of the following is an example of a fomite?
• A) A mosquito
• B) A contaminated doorknob
• C) An infected patient
• D) A sneeze droplet
Rationale: A fomite is an inanimate object that can carry and
transmit infectious agents. A doorknob is a classic example.
7. The single most effective way to break the chain of infection in
a healthcare setting is:
• A) Hand hygiene
• B) Wearing gloves
• C) Using face masks
• D) Sterilizing equipment
Rationale: Hand hygiene is the most basic and effective
measure to prevent transmission of pathogens between
patients and healthcare workers.
8. A patient with influenza coughs and releases droplets into the
air. A nearby visitor inhales these droplets. The droplets
represent which component?
