CBIC Trivia 5

Question 1

The concept of 'herd immunity' in infection control refers to:

Accepted Answer

Indirect protection of susceptible individuals when a sufficient proportion of the population is immune

Answer

Herd immunity occurs when enough of a population is immune to a disease, reducing its spread and protecting those who cannot be vaccinated.

Question 2

Which of the following best describes a 'common source' outbreak?

Accepted Answer

An outbreak where multiple cases share exposure to the same contaminated source

Answer

In a common-source outbreak, cases are linked to a single point or continuous exposure source such as contaminated water or food.

Question 3

Which disinfectant class is considered a HIGH-level disinfectant when used at appropriate concentrations and contact times?

Accepted Answer

Glutaraldehyde

Answer

Glutaraldehyde (e.g., Cidex) achieves high-level disinfection in 20–90 minutes and sterilization with extended soaking, making it appropriate for semicritical items.

Question 4

CRE stands for carbapenem-resistant Enterobacteriaceae. Which enzyme is most commonly responsible for carbapenem resistance in Klebsiella pneumoniae in the United States?

Accepted Answer

KPC (Klebsiella pneumoniae carbapenemase)

Answer

KPC is the most prevalent carbapenemase mechanism in the U.S., particularly in Klebsiella pneumoniae, and is encoded on transferable plasmids.

Question 5

According to the CDC, a central line-associated bloodstream infection (CLABSI) is defined as a laboratory-confirmed bloodstream infection in a patient who had a central line within how many days before the infection?

Accepted Answer

2 days

Answer

NHSN defines CLABSI as a BSI where the patient had a central line on the date of the event or within the 2 days before, with no other recognized infection source.

CBIC - Certification Board of Infection Control Practice Test

CBIC - Certification Board of Infection Control Practice Test

CBIC Trivia 5