CBIC Ultimate CBIC 2 — Questions and Answers
Question 1: Which surveillance method calculates infection rates using patient-days as the denominator?
- Prevalence surveillance
- Incidence density surveillance (Correct answer)
- Targeted surveillance
- Outbreak surveillance
Correct answer: Incidence density surveillance
Incidence density surveillance uses patient-days as the denominator, allowing more accurate rate comparisons across units with differing lengths of stay.
Question 2: A healthcare worker sustains a needlestick injury from an HIV-positive patient. What is the FIRST action that should be taken?
- Initiate post-exposure prophylaxis immediately
- Wash the wound thoroughly with soap and water (Correct answer)
- Report the exposure to the occupational health department
- Draw baseline serology from the exposed worker
Correct answer: Wash the wound thoroughly with soap and water
The immediate first action following a needlestick is thorough washing of the wound with soap and water to reduce the pathogen load.
Question 3: Which organism is most commonly associated with hospital-acquired urinary tract infections?
- Staphylococcus aureus
- Pseudomonas aeruginosa
- Escherichia coli (Correct answer)
- Candida albicans
Correct answer: Escherichia coli
Escherichia coli is the most common causative organism in catheter-associated and non-catheter-associated healthcare-acquired UTIs.
Question 4: The Spaulding classification system categorizes medical devices based on:
- The material composition of the device
- The risk of infection transmission associated with device use (Correct answer)
- The manufacturer's recommended reprocessing cycle
- The patient's immune status at time of use
Correct answer: The risk of infection transmission associated with device use
The Spaulding classification categorizes devices as critical, semicritical, or noncritical based on the degree of infection risk when the item is used.
Question 5: Which isolation precaution category requires placement of the patient in an airborne infection isolation room (AIIR)?
- Contact precautions
- Droplet precautions
- Airborne precautions (Correct answer)
- Protective environment
Correct answer: Airborne precautions
Airborne precautions require a negative-pressure AIIR to prevent transmission of small-particle aerosols such as those produced by tuberculosis or measles.
Question 6: Which statistical measure describes the probability that a test will correctly identify individuals WITHOUT the disease?
- Sensitivity
- Positive predictive value
- Specificity (Correct answer)
- Negative predictive value
Correct answer: Specificity
Specificity is the proportion of true negatives correctly identified by a test — the probability of a negative result in those who are truly disease-free.
Question 7: What is the primary purpose of a root cause analysis (RCA) following a healthcare-associated infection outbreak?
- To assign blame to the responsible staff member
- To identify contributing factors and implement corrective actions (Correct answer)
- To document the outbreak for regulatory reporting
- To calculate the financial cost of the outbreak
Correct answer: To identify contributing factors and implement corrective actions
RCA is a systematic process to identify underlying causes of adverse events and implement sustainable corrective actions to prevent recurrence.
CBIC Ultimate CBIC 2
Which surveillance method calculates infection rates using patient-days as the denominator?