CBIC Ultimate CBIC 4 — Questions and Answers
Question 1: Which of the following is the MOST important risk factor for developing a surgical site infection (SSI)?
- Patient age over 65
- Prolonged preoperative hospitalization (Correct answer)
- ASA score of 1
- Use of prophylactic antibiotics
Correct answer: Prolonged preoperative hospitalization
Prolonged preoperative hospitalization allows colonization with hospital-adapted, drug-resistant organisms, significantly increasing the risk of SSI.
Question 2: The Hawthorne effect in infection prevention surveillance refers to:
- Improvement in hand hygiene compliance when observers are present (Correct answer)
- Increased infection rates during high-census periods
- The tendency of data collectors to underreport infections
- Seasonal variation in respiratory infection incidence
Correct answer: Improvement in hand hygiene compliance when observers are present
The Hawthorne effect describes the phenomenon where compliance improves temporarily because individuals know they are being observed, which can inflate hand hygiene audit results.
Question 3: Which bloodborne pathogen has the HIGHEST transmission risk following a needlestick exposure from an infected patient?
- HIV
- Hepatitis C virus (HCV)
- Hepatitis B virus (HBV) (Correct answer)
- Hepatitis A virus (HAV)
Correct answer: Hepatitis B virus (HBV)
HBV has the highest per-exposure transmission risk following a needlestick (6–30%) compared to HCV (~1.8%) and HIV (~0.3%), particularly with HBeAg-positive source patients.
Question 4: An infection preventionist is reviewing the literature to assess the effectiveness of a new intervention. Which study design provides the highest level of evidence?
- Case-control study
- Cohort study
- Randomized controlled trial (Correct answer)
- Expert opinion
Correct answer: Randomized controlled trial
A randomized controlled trial (RCT) is the gold standard study design, minimizing bias through random allocation of participants to intervention and control groups.
Question 5: Which of the following pathogens is associated with waterborne outbreaks in healthcare facilities through contaminated ice machines and water systems?
- Norovirus
- Legionella pneumophila (Correct answer)
- Clostridioides difficile
- Methicillin-resistant Staphylococcus aureus (MRSA)
Correct answer: Legionella pneumophila
Legionella pneumophila thrives in warm water systems such as cooling towers, hot water tanks, and decorative fountains, causing healthcare-associated Legionnaires' disease outbreaks.
Question 6: What does the term 'endemic rate' mean in the context of healthcare-associated infection surveillance?
- The infection rate during a recognized outbreak
- The baseline rate of infections normally observed in a facility (Correct answer)
- The rate of infections in the community at large
- The rate of infections in immunocompromised patients only
Correct answer: The baseline rate of infections normally observed in a facility
The endemic rate is the usual or baseline level of infection present in a given population or facility, against which deviations (potential outbreaks) are measured.
Question 7: Which federal agency requires healthcare facilities to report certain healthcare-associated infections through the National Healthcare Safety Network (NHSN)?
- The Joint Commission (TJC)
- Centers for Disease Control and Prevention (CDC)
- Occupational Safety and Health Administration (OSHA)
- Centers for Medicare and Medicaid Services (CMS) (Correct answer)
Correct answer: Centers for Medicare and Medicaid Services (CMS)
CMS requires participating facilities to report select HAI data through NHSN as a condition of payment under the Inpatient Prospective Payment System.
CBIC Ultimate CBIC 4
Which of the following is the MOST important risk factor for developing a surgical site infection (SSI)?