A-IPC EXAM STUDY GUIDE (PRACTICE TEST #1)
QUESTIONS WITH CORRECT SOLUTIONS.
The bacterium most likely to be transmitted from mother to infant during labor and
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cause neonatal sepsis is:
aa aa aa aa aa
a. Escherichia coli
aa aa aa
b. Staphylococcus aureus
aa aa aa
c. Group B Streptococcus
aa aa aa aa
d. Group A Streptococcus - Ans>>>c. Group B Streptococcus
aa aa aa aa aa aa aa aa
Which of the following is an example of the criterion of "Strength of the Association"
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
from Hill's criteria for causation?
aa aa aa aa aa aa
a. In a study of the association between antibiotic exposure and development of C.
aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile infection, the odds ratio was 2:3
aa aa aa aa aa aa aa aa
b. In a study of the association between antibiotic exposure and development of C.
aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile infection, the authors' conclusions are consistent with those of three other
aa aa aa aa aa aa aa aa aa aa aa aa
studies
aa aa
c. In a study of the association between antibiotic exposure and development of C.
aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile infection, antibiotic therapy began an average of 3 weeks before C. difficile
aa aa aa aa aa aa aa aa aa aa aa aa aa
infection developed
aa aa aa
d. In a study of the association between antibiotic exposure and development of C.
aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile infection, prolonged antibiotic therapy was a greater risk factor for C. difficile
aa aa aa aa aa aa aa aa aa aa aa aa aa
infection than short-term antibiotic therapy - Ans>>>a. In a study of the association
aa aa aa aa aa aa aa aa aa aa aa aa aa
between antibiotic exposure and development of C. difficile infection, the odds ratio
aa aa aa aa aa aa aa aa aa aa aa aa
was 2:3
aa aa
Which of the following rules should be followed when collecting a stool sample for C.
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile testing?
aa aa aa
1) Stool sample should be freshly passed within 1-2 hours
aa aa aa aa aa aa aa aa aa aa
2) 10-20mL. of formed stool should be collected
aa aa aa aa aa aa aa aa
3) Stool should be passed into a clean, dry container
aa aa aa aa aa aa aa aa aa aa
4) Specimens should be obtained before antimicrobial agents have been administered
aa
aa aa aa aa aa aa aa aa aa aa
a. 1, 2
aa aa aa
b. 2, 3
aa aa aa
c. 1, 3
aa aa aa
,d. 1, 4 - Ans>>>c. 1, 3
aa aa aa aa aa aa
What type of meningitis would be most consistent with the following cerebrospinal
aa aa aa aa aa aa aa aa aa aa aa
fluid (CSF) report result:
aa aa aa aa aa
Glucose= Decreased; Protein= Elevated; WBC counts= 1,000/mm3
aa aa aa aa aa aa aa
a. Bacterial
aa aa
b. Viral
aa aa
c. Fungal
aa aa
d. Tuberculosis - Ans>>>a. Bacterial
aa aa aa aa
The following blood culture result should be considered a potential contaminant:
aa aa aa aa aa aa aa aa aa aa aa
a. A positive result of coagulase-negative staphylococci from two sets, 2 days apart,
aa aa aa aa aa aa aa aa aa aa aa aa
without symptoms
aa aa aa
b. A positive result of S. aureus from one bottle in a patient with a temperature of
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
38.6°C
aa aa
c. A positive result of E. coli from one bottle in an afebrile patient with diarrhea
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
d. A positive result of Candida albicans in a fungal blood culture in a patient with a
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
urinary tract infection - Ans>>>a. A positive result of coagulase-negative
aa aa aa aa aa aa aa aa aa aa
staphylococci from two sets, 2 days apart, without symptoms
aa aa aa aa aa aa aa aa aa
Which of the following organisms have been associated with the transmission of
aa aa aa aa aa aa aa aa aa aa aa
infections after body piercing?
aa aa aa aa aa
1) Atypical Mycobacterium species
aa aa aa aa
2) Staphylococcus species
aa aa aa
3) Pseudomonas species
aa aa aa
4) Haemophilus species
aa aa aa
a. 1, 2, 3
aa aa aa aa
b. 2, 3, 4
aa aa aa aa
c. 1, 3, 4
aa aa aa aa
d. 1, 2, 4 - Ans>>>a. 1, 2, 3
aa aa aa aa aa aa aa aa
The Director of the Operating Room (OR) requests that the OR surfaces be routinely
aa aa aa aa aa aa aa aa aa aa aa aa aa
environmentally cultured. The IP's best response should be:
aa aa aa aa aa aa aa aa aa
a. A schedule for routine culturing of the OR should be arranged so that each room is
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
cultured at a set interval
aa aa aa aa aa aa
b. Routine culturing of the OR should be done in the absence of any epidemiologic
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
investigations in that area
aa aa aa aa aa
c. Routine culturing should not be done because it is too expensive
aa aa aa aa aa aa aa aa aa aa aa aa
d. Routine environmental culturing should not be considered unless an epidemiologic
aa aa aa aa aa aa aa aa aa aa
investigation is being conducted - Ans>>>d. Routine environmental culturing should
aa aa aa aa aa aa aa aa aa aa
not be considered unless an epidemiologic investigation is being conducted
aa aa aa aa aa aa aa aa aa aa
All of the following may be indications of a heating, ventilation, and air conditioning
aa aa aa aa aa aa aa aa aa aa aa aa aa
(HVAC) malfunction except:
aa aa aa aa
a. An increase in the postoperative surgical site infection (SSI) rates
aa aa aa aa aa aa aa aa aa aa aa
b. A single case of aspergillosis in a severely immunosuppressed patient
aa aa aa aa aa aa aa aa aa aa aa
, c. Healthcare-associated varicella infections
aa aa aa aa
d. An outbreak of ventilator-associated Acinetobacter infections in the Intensive Care
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Unit (ICU) - Ans>>>d. An outbreak of ventilator-associated Acinetobacter infections in
aa aa aa aa aa aa aa aa aa aa aa
the Intensive Care Unit (ICU)
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A patient who underwent intraocular surgery was diagnosed with a noninfectious
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endopthalmitis after the procedure. The IP initiates an investigation to identify the
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possible cause. Which of the following factors should be considered?
aa aa aa aa aa aa aa aa aa aa aa
1) Improper handling, cleaning, and rinsing of the instruments
aa aa aa aa aa aa aa aa aa
2) Improper labeling of the solutions
aa aa aa aa aa aa
3) Gloves and powder
aa aa aa aa
4) Prophylactic antibiotics administered 2 hours before the procedure
aa aa aa aa aa aa aa aa aa
a. 1, 3
aa aa aa
b. 1, 2
aa aa aa
c. 3, 4
aa aa aa
d. 2, 4 - Ans>>>a. 1, 3
aa aa aa aa aa aa
Sensitivity may be defined as: aa aa aa aa aa
a. The ability of a test to detect true positives (persons with the disease) when applied
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
to a population with the disease
aa aa aa aa aa aa aa
b. The ability of a test to detect the true negatives (persons without the disease) when
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
applied to a population without the disease
aa aa aa aa aa aa aa aa
c. The ability of a test to detect true positives (persons with disease) when applied to
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
a population without the disease
aa aa aa aa aa aa
d. The percentage of persons with true positive results when the test is applied to
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
persons without the disease - Ans>>>a. The ability of a test to detect true positives
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
(persons with the disease) when applied to a population with the disease
aa aa aa aa aa aa aa aa aa aa aa aa
The IP is monitoring blood work in order to differentiate between bacterial or viral
aa aa aa aa aa aa aa aa aa aa aa aa aa
infection in a newly admitted ICU patient. Which of the following components of a
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
complete blood count (CBC) should the IP examine in order to determine this
aa aa aa aa aa aa aa aa aa aa aa aa aa
information?
aa aa
a. Hematocrit
aa aa
b. White blood cell count
aa aa aa aa aa
c. Platelet (thrombocyte count)
aa aa aa aa
d. Red blood cell indices - Ans>>>b. White blood cell count
aa aa aa aa aa aa aa aa aa aa
A nurse manager from a Rehabilitation Unit is requesting that aerators be installed on
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the sinks in the patient rooms on her unit. The IP should explain that:
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a. Aerators should be placed on all sinks in the ICU only
aa aa aa aa aa aa aa aa aa aa aa aa
b. Aerators are more effective when combined with an ultraviolet water disinfection
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method
aa aa
c. Aerators increase the risk of HAIs
aa aa aa aa aa aa aa
d. Low-flow aerators are suitable for use with this population - Ans>>>c. Aerators
aa aa aa aa aa aa aa aa aa aa aa aa
increase the risk of HAIs
aa aa aa aa aa
QUESTIONS WITH CORRECT SOLUTIONS.
The bacterium most likely to be transmitted from mother to infant during labor and
aa aa aa aa aa aa aa aa aa aa aa aa aa
cause neonatal sepsis is:
aa aa aa aa aa
a. Escherichia coli
aa aa aa
b. Staphylococcus aureus
aa aa aa
c. Group B Streptococcus
aa aa aa aa
d. Group A Streptococcus - Ans>>>c. Group B Streptococcus
aa aa aa aa aa aa aa aa
Which of the following is an example of the criterion of "Strength of the Association"
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
from Hill's criteria for causation?
aa aa aa aa aa aa
a. In a study of the association between antibiotic exposure and development of C.
aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile infection, the odds ratio was 2:3
aa aa aa aa aa aa aa aa
b. In a study of the association between antibiotic exposure and development of C.
aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile infection, the authors' conclusions are consistent with those of three other
aa aa aa aa aa aa aa aa aa aa aa aa
studies
aa aa
c. In a study of the association between antibiotic exposure and development of C.
aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile infection, antibiotic therapy began an average of 3 weeks before C. difficile
aa aa aa aa aa aa aa aa aa aa aa aa aa
infection developed
aa aa aa
d. In a study of the association between antibiotic exposure and development of C.
aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile infection, prolonged antibiotic therapy was a greater risk factor for C. difficile
aa aa aa aa aa aa aa aa aa aa aa aa aa
infection than short-term antibiotic therapy - Ans>>>a. In a study of the association
aa aa aa aa aa aa aa aa aa aa aa aa aa
between antibiotic exposure and development of C. difficile infection, the odds ratio
aa aa aa aa aa aa aa aa aa aa aa aa
was 2:3
aa aa
Which of the following rules should be followed when collecting a stool sample for C.
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
difficile testing?
aa aa aa
1) Stool sample should be freshly passed within 1-2 hours
aa aa aa aa aa aa aa aa aa aa
2) 10-20mL. of formed stool should be collected
aa aa aa aa aa aa aa aa
3) Stool should be passed into a clean, dry container
aa aa aa aa aa aa aa aa aa aa
4) Specimens should be obtained before antimicrobial agents have been administered
aa
aa aa aa aa aa aa aa aa aa aa
a. 1, 2
aa aa aa
b. 2, 3
aa aa aa
c. 1, 3
aa aa aa
,d. 1, 4 - Ans>>>c. 1, 3
aa aa aa aa aa aa
What type of meningitis would be most consistent with the following cerebrospinal
aa aa aa aa aa aa aa aa aa aa aa
fluid (CSF) report result:
aa aa aa aa aa
Glucose= Decreased; Protein= Elevated; WBC counts= 1,000/mm3
aa aa aa aa aa aa aa
a. Bacterial
aa aa
b. Viral
aa aa
c. Fungal
aa aa
d. Tuberculosis - Ans>>>a. Bacterial
aa aa aa aa
The following blood culture result should be considered a potential contaminant:
aa aa aa aa aa aa aa aa aa aa aa
a. A positive result of coagulase-negative staphylococci from two sets, 2 days apart,
aa aa aa aa aa aa aa aa aa aa aa aa
without symptoms
aa aa aa
b. A positive result of S. aureus from one bottle in a patient with a temperature of
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
38.6°C
aa aa
c. A positive result of E. coli from one bottle in an afebrile patient with diarrhea
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
d. A positive result of Candida albicans in a fungal blood culture in a patient with a
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
urinary tract infection - Ans>>>a. A positive result of coagulase-negative
aa aa aa aa aa aa aa aa aa aa
staphylococci from two sets, 2 days apart, without symptoms
aa aa aa aa aa aa aa aa aa
Which of the following organisms have been associated with the transmission of
aa aa aa aa aa aa aa aa aa aa aa
infections after body piercing?
aa aa aa aa aa
1) Atypical Mycobacterium species
aa aa aa aa
2) Staphylococcus species
aa aa aa
3) Pseudomonas species
aa aa aa
4) Haemophilus species
aa aa aa
a. 1, 2, 3
aa aa aa aa
b. 2, 3, 4
aa aa aa aa
c. 1, 3, 4
aa aa aa aa
d. 1, 2, 4 - Ans>>>a. 1, 2, 3
aa aa aa aa aa aa aa aa
The Director of the Operating Room (OR) requests that the OR surfaces be routinely
aa aa aa aa aa aa aa aa aa aa aa aa aa
environmentally cultured. The IP's best response should be:
aa aa aa aa aa aa aa aa aa
a. A schedule for routine culturing of the OR should be arranged so that each room is
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
cultured at a set interval
aa aa aa aa aa aa
b. Routine culturing of the OR should be done in the absence of any epidemiologic
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
investigations in that area
aa aa aa aa aa
c. Routine culturing should not be done because it is too expensive
aa aa aa aa aa aa aa aa aa aa aa aa
d. Routine environmental culturing should not be considered unless an epidemiologic
aa aa aa aa aa aa aa aa aa aa
investigation is being conducted - Ans>>>d. Routine environmental culturing should
aa aa aa aa aa aa aa aa aa aa
not be considered unless an epidemiologic investigation is being conducted
aa aa aa aa aa aa aa aa aa aa
All of the following may be indications of a heating, ventilation, and air conditioning
aa aa aa aa aa aa aa aa aa aa aa aa aa
(HVAC) malfunction except:
aa aa aa aa
a. An increase in the postoperative surgical site infection (SSI) rates
aa aa aa aa aa aa aa aa aa aa aa
b. A single case of aspergillosis in a severely immunosuppressed patient
aa aa aa aa aa aa aa aa aa aa aa
, c. Healthcare-associated varicella infections
aa aa aa aa
d. An outbreak of ventilator-associated Acinetobacter infections in the Intensive Care
aa aa aa aa aa aa aa aa aa aa
Unit (ICU) - Ans>>>d. An outbreak of ventilator-associated Acinetobacter infections in
aa aa aa aa aa aa aa aa aa aa aa
the Intensive Care Unit (ICU)
aa aa aa aa aa
A patient who underwent intraocular surgery was diagnosed with a noninfectious
aa aa aa aa aa aa aa aa aa aa
endopthalmitis after the procedure. The IP initiates an investigation to identify the
aa aa aa aa aa aa aa aa aa aa aa aa
possible cause. Which of the following factors should be considered?
aa aa aa aa aa aa aa aa aa aa aa
1) Improper handling, cleaning, and rinsing of the instruments
aa aa aa aa aa aa aa aa aa
2) Improper labeling of the solutions
aa aa aa aa aa aa
3) Gloves and powder
aa aa aa aa
4) Prophylactic antibiotics administered 2 hours before the procedure
aa aa aa aa aa aa aa aa aa
a. 1, 3
aa aa aa
b. 1, 2
aa aa aa
c. 3, 4
aa aa aa
d. 2, 4 - Ans>>>a. 1, 3
aa aa aa aa aa aa
Sensitivity may be defined as: aa aa aa aa aa
a. The ability of a test to detect true positives (persons with the disease) when applied
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
to a population with the disease
aa aa aa aa aa aa aa
b. The ability of a test to detect the true negatives (persons without the disease) when
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
applied to a population without the disease
aa aa aa aa aa aa aa aa
c. The ability of a test to detect true positives (persons with disease) when applied to
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
a population without the disease
aa aa aa aa aa aa
d. The percentage of persons with true positive results when the test is applied to
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
persons without the disease - Ans>>>a. The ability of a test to detect true positives
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
(persons with the disease) when applied to a population with the disease
aa aa aa aa aa aa aa aa aa aa aa aa
The IP is monitoring blood work in order to differentiate between bacterial or viral
aa aa aa aa aa aa aa aa aa aa aa aa aa
infection in a newly admitted ICU patient. Which of the following components of a
aa aa aa aa aa aa aa aa aa aa aa aa aa aa
complete blood count (CBC) should the IP examine in order to determine this
aa aa aa aa aa aa aa aa aa aa aa aa aa
information?
aa aa
a. Hematocrit
aa aa
b. White blood cell count
aa aa aa aa aa
c. Platelet (thrombocyte count)
aa aa aa aa
d. Red blood cell indices - Ans>>>b. White blood cell count
aa aa aa aa aa aa aa aa aa aa
A nurse manager from a Rehabilitation Unit is requesting that aerators be installed on
aa aa aa aa aa aa aa aa aa aa aa aa aa
the sinks in the patient rooms on her unit. The IP should explain that:
aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
a. Aerators should be placed on all sinks in the ICU only
aa aa aa aa aa aa aa aa aa aa aa aa
b. Aerators are more effective when combined with an ultraviolet water disinfection
aa aa aa aa aa aa aa aa aa aa aa
method
aa aa
c. Aerators increase the risk of HAIs
aa aa aa aa aa aa aa
d. Low-flow aerators are suitable for use with this population - Ans>>>c. Aerators
aa aa aa aa aa aa aa aa aa aa aa aa
increase the risk of HAIs
aa aa aa aa aa
