CBIC Environmental Cleaning 5

Question 1

Which of the following pathogens can survive on dry inanimate surfaces for months, making rigorous environmental cleaning especially critical?

Accepted Answer

Clostridium difficile spores

Answer

C. difficile spores are exceptionally resistant and can persist on surfaces for months, serving as a major environmental reservoir for transmission.

Question 2

When evaluating a new disinfectant for hospital use, which label claim is MOST relevant to confirming tuberculocidal activity?

Accepted Answer

EPA-registered as a hospital disinfectant with tuberculocidal claim

Answer

A tuberculocidal claim on the EPA-registered label confirms the product meets efficacy standards for Mycobacterium tuberculosis, the most resistant non-spore-forming organism used as a disinfection benchmark.

Question 3

In the context of environmental cleaning, 'horizontal' surfaces in patient rooms are considered higher risk because they:

Accepted Answer

Collect settling particles and are frequently touched, accumulating contamination

Answer

Horizontal surfaces collect airborne particles and are often hand-contact surfaces, making them significant reservoirs for pathogens.

Question 4

An ICP is reviewing an ATP monitoring program. A threshold of ≥250 relative light units (RLU) is flagged as a cleaning failure. This threshold is best described as:

Accepted Answer

A facility-defined benchmark, with thresholds varying by surface type and institution

Answer

ATP RLU thresholds are not universally mandated; each facility establishes benchmarks based on surface type, equipment, and local validation data.

Question 5

Which practice BEST reduces the risk of disinfectant resistance developing among healthcare pathogens?

Accepted Answer

Using EPA-registered products at label-specified concentrations and contact times

Answer

Using EPA-registered products at labeled concentrations and contact times ensures adequate microbial kill and reduces selective pressure for resistance development.

CBIC - Certification Board of Infection Control Practice Test

CBIC - Certification Board of Infection Control Practice Test

CBIC Environmental Cleaning 5