NS 660 Exam 2 – Questions With Approved Answers
Starting at the top of the circle and continue clockwise, name the chain of
infection Correct Answer - Infectious agent --> Reservoir --> Portal of
Exit --> Mode of Transmission --> Portal of Entry --> Susceptible host
Define infectivity Correct Answer - How easy pathogens are to catch
Define virulence Correct Answer - The level of danger from the infection
they cause
What is a reservoir? Give some examples Correct Answer - Reservoir=
place in environment where disease is maintained.
Skin is a natural reservoir for yeast and bacteria; GI is a reservoir for many
types of organisms (viruses, bacteria, parasites)
Animals carry ticks, Lyme disease.
Which one of the following is the most likely source of asymptomatic
transmission?
A) a patient is admitted to MGH White 10 for fluid replacement in the setting
of "food poisoning" with N/V/D
B) Student nurse admitted to MGH for heart palpitations after NS 660 exam
one.
C) Patient admitted to MGH with fever, chills, and a CXR showing right lower
lobe pneumonia
D) Patient admitted to White 11 for uncontrolled diabetes and who has a
chronic infected diabetic foot ulcer-dressing only changed by nurse. Patient
does not have fever, no drainage, no increase in WBC Correct Answer -
D) Patient admitted to White 11 for uncontrolled diabetes and who has a
chronic infected diabetic foot ulcer-dressing only changed by nurse. Patient
does not have fever, no drainage, no increase in WBC
, Key is last sentence. No symptoms!
What are some examples of Portal of Exit? What are their corresponding
actions? Correct Answer - Respiratory tract: cover cough and sneezes
GI: handling bodily fluid with gloves, practice hand hygiene
skin: keeping draining wounds covered with dressing; not working when one
has exudative lesions or weeping dermatitis
Other examples:
GU
circulatory
You are assigned to care for a patient admitted to MGH with history of AIDS.
What type of precautions are appropriate for the patient?
A) wear double gloves fora ll contact with this patient
B) Respiratory contact
C) Isolation and he should be in private room
D) Standard precautions Correct Answer - D) Standard precautions
Define Portal of Entry and give some corresponding actions Correct Answer
- mouth/nose/eyes, anatomical openings, skin breaks, surgical wounds, IV
sites, anatomical openings with tubes,
Actions include: proper surgical dressing, IV site dressings and care,
elimination of tubes as soon as possible, PPE, keeping unwashed hands and
objects away from mouth
Which of the following best describes the chain of infection?
A) portal of entry and exit
B) Virus, bacterium and parasite
C) Causative agent, mode of transmission and susceptible host
Starting at the top of the circle and continue clockwise, name the chain of
infection Correct Answer - Infectious agent --> Reservoir --> Portal of
Exit --> Mode of Transmission --> Portal of Entry --> Susceptible host
Define infectivity Correct Answer - How easy pathogens are to catch
Define virulence Correct Answer - The level of danger from the infection
they cause
What is a reservoir? Give some examples Correct Answer - Reservoir=
place in environment where disease is maintained.
Skin is a natural reservoir for yeast and bacteria; GI is a reservoir for many
types of organisms (viruses, bacteria, parasites)
Animals carry ticks, Lyme disease.
Which one of the following is the most likely source of asymptomatic
transmission?
A) a patient is admitted to MGH White 10 for fluid replacement in the setting
of "food poisoning" with N/V/D
B) Student nurse admitted to MGH for heart palpitations after NS 660 exam
one.
C) Patient admitted to MGH with fever, chills, and a CXR showing right lower
lobe pneumonia
D) Patient admitted to White 11 for uncontrolled diabetes and who has a
chronic infected diabetic foot ulcer-dressing only changed by nurse. Patient
does not have fever, no drainage, no increase in WBC Correct Answer -
D) Patient admitted to White 11 for uncontrolled diabetes and who has a
chronic infected diabetic foot ulcer-dressing only changed by nurse. Patient
does not have fever, no drainage, no increase in WBC
, Key is last sentence. No symptoms!
What are some examples of Portal of Exit? What are their corresponding
actions? Correct Answer - Respiratory tract: cover cough and sneezes
GI: handling bodily fluid with gloves, practice hand hygiene
skin: keeping draining wounds covered with dressing; not working when one
has exudative lesions or weeping dermatitis
Other examples:
GU
circulatory
You are assigned to care for a patient admitted to MGH with history of AIDS.
What type of precautions are appropriate for the patient?
A) wear double gloves fora ll contact with this patient
B) Respiratory contact
C) Isolation and he should be in private room
D) Standard precautions Correct Answer - D) Standard precautions
Define Portal of Entry and give some corresponding actions Correct Answer
- mouth/nose/eyes, anatomical openings, skin breaks, surgical wounds, IV
sites, anatomical openings with tubes,
Actions include: proper surgical dressing, IV site dressings and care,
elimination of tubes as soon as possible, PPE, keeping unwashed hands and
objects away from mouth
Which of the following best describes the chain of infection?
A) portal of entry and exit
B) Virus, bacterium and parasite
C) Causative agent, mode of transmission and susceptible host
