CIC Environment of Care 4 — Questions and Answers
Question 1: A healthcare facility is investigating a cluster of Aspergillus infections in an oncology unit. Construction is occurring two floors below. What is the most likely transmission route?
- Contaminated water in ice machines on the unit
- Airborne fungal spores migrating through the HVAC system or stairwells (Correct answer)
- Direct contact with infected construction workers
- Contaminated parenteral nutrition solutions
Correct answer: Airborne fungal spores migrating through the HVAC system or stairwells
Aspergillus spores are airborne and can travel long distances through HVAC systems or negative-pressure stairwells from remote construction sites to immunocompromised patient units.
Question 2: Which element of the ICRA matrix helps determine the appropriate infection control barrier class during healthcare construction?
- The construction budget and timeline only
- The type of construction activity AND the risk group of patients in the adjacent area (Correct answer)
- The number of construction workers involved in the project
- The age of the building being renovated
Correct answer: The type of construction activity AND the risk group of patients in the adjacent area
The ICRA matrix combines the construction activity type (Type A–D) with the patient risk group (Group 1–4) to determine the required containment class (I–IV).
Question 3: Which practice is recommended to prevent healthcare-associated Legionella in facility water systems?
- Maintaining hot water temperature below 45°C at all outlets
- Implementing a water management program per CDC and ASHRAE 188 guidelines (Correct answer)
- Using only bottled water for patient care activities
- Monthly testing of patient-facing faucets for coliform bacteria only
Correct answer: Implementing a water management program per CDC and ASHRAE 188 guidelines
A comprehensive water management program (WMP) per CDC Healthcare Water guidelines and ASHRAE 188 is the recommended strategy to prevent Legionella in healthcare facility water systems.
Question 4: A post-discharge room disinfection audit reveals that the UV-C disinfection robot missed several surfaces. What is the most likely reason?
- UV-C light is ineffective against common healthcare pathogens
- Shadow areas obstructed by furniture or equipment blocked UV-C exposure (Correct answer)
- The room humidity was too low for UV-C to be effective
- UV-C robots require 24 hours to recharge between uses
Correct answer: Shadow areas obstructed by furniture or equipment blocked UV-C exposure
UV-C light travels in straight lines and cannot disinfect surfaces in shadows or behind furniture, making thorough manual pre-cleaning and optimal robot positioning critical.
Question 5: What is the primary infection prevention rationale for maintaining carpeted surfaces out of high-risk healthcare areas?
- Carpet increases electrostatic discharge that damages medical equipment
- Carpet cannot be adequately disinfected with hospital-grade disinfectants and harbors pathogens (Correct answer)
- Carpet increases patient fall risk leading to wound infections
- Regulatory agencies universally prohibit carpet in all hospital spaces
Correct answer: Carpet cannot be adequately disinfected with hospital-grade disinfectants and harbors pathogens
Carpet fibers harbor pathogens and cannot be adequately disinfected with liquid disinfectants, making hard-surface flooring preferable in patient care and procedure areas.
Question 6: Which approach best describes 'two-step' cleaning and disinfection of an environmental surface?
- Applying disinfectant twice to the same surface without cleaning
- First removing visible soil with a detergent, then applying a disinfectant (Correct answer)
- Disinfecting and then rinsing with water to remove chemical residue
- Applying a combined cleaner-disinfectant product twice in succession
Correct answer: First removing visible soil with a detergent, then applying a disinfectant
Two-step disinfection involves first cleaning with a detergent to remove organic matter, then applying a disinfectant, because organic soil inactivates many disinfectants.
Question 7: When performing a risk assessment for placement of a patient requiring airborne precautions, which room characteristic takes priority?
- The room must be located near the nursing station for ease of monitoring
- The room must have a private bathroom and large square footage
- The room must maintain negative air pressure relative to the corridor (Correct answer)
- The room must have an anteroom for donning PPE
Correct answer: The room must maintain negative air pressure relative to the corridor
The most critical engineering requirement for airborne precautions is sustained negative air pressure relative to adjacent areas, preventing infectious aerosols from escaping to the hallway.
CIC Environment of Care 4
A healthcare facility is investigating a cluster of Aspergillus infections in an oncology unit.
Construction is occurring two floors below.
What is the most likely transmission route?