Free CBIC Infection-Control Exam Questions

Question 1

The annual report for Infection Prevention shows a dramatic decrease in urinary catheter days, a decrease in the catheter utilization ratio, and a slight decrease in the number of catheter-associated urinary tract infections (CAUTIs). The report does not show an increase in the overall rate of CAUTI. How would the infection preventionist explain this to the administration?

A : The rate is incorrect and needs to be recalculated.

B : The rate may be higher if the denominator is very small.

C : The rate is not affected by the number of catheter days.

D : Decreasing catheter days will not have an effect on decreasing CAUTI.

Answer: B

Question 2

A patient with shortness of breath and a history of a tuberculin skin test (TST) of 15 mm induration was admitted to a semi-private room. The infection preventionist's FIRST action should be to

A : contact the roommate's physician to initiate TST.

B : review the patient's medical record to determine the likelihood of pulmonary tuberculosis (TB).

C : report the findings to the Employee Health Department to initiate exposure follow-up of hospital staff.

D : transfer the patient to an airborne infection isolation room and initiate appropriate isolation for tuberculosis (TB).

Answer: B

Question 3

A city has a population of 150.000. Thirty new cases of tuberculosis (TB) were diagnosed in the city last year. These now cases brought the total number of active TB cases in the city last year to 115. Which of the following equations represents the incidence rate tor TB per 100.000 in that year?

A : (30 ÷ 150.000) x 100.000 = X

B : (30÷ 150.000) x 100 = X

C : (115 ÷ 150.000) x 100.000 - X

D : (115 ÷ 100.000) x 100 = X

Answer: A

Question 4

The annual report for Infection Prevention shows a dramatic decrease in urinary catheter days, a decrease in the catheter utilization ratio, and a slight decrease in the number of catheter-associated urinary tract infections (CAUTIs). The report does not show an increase in the overall rate of CAUTI. How would the infection preventionist explain this to the administration?

A : The rate is incorrect and needs to be recalculated.

B : The rate may be higher if the denominator is very small.

C : The rate is not affected by the number of catheter days.

D : Decreasing catheter days will not have an effect on decreasing CAUTI.

Answer: B

Question 5

Which statistical test is MOST appropriate for comparing infection rates before and after an intervention?

A : Student’s t-test

B : Chi-square test for proportions

C : Linear regression analysis

D : Wilcoxon rank-sum test

Answer: B