The CBIC Certified Infection Control Exam Study Guide (6th edition) clearly emphasizes that oncology units house highly immunocompromised patients, making environmental sources of infection a critical concern during design and planning phases. Natural plants, soil, and standing water are well-recognized reservoirs for environmental fungi and gram-negative bacteria, including Aspergillus, Fusarium, and Pseudomonas species, all of which pose a serious infection risk to oncology patients.

Rather than allowing the process to continue unchecked (Option A) or completely shutting down discussion (Option D), the infection preventionist’s role is to guide the team toward safer alternatives while supporting collaborative planning. Asking whether artificial plants can be used instead (Option C) is the most appropriate action because it maintains the aesthetic goals of the design team while eliminating the infection risks associated with live plants.

Option B, asking about the air handling unit, is important in oncology design but does not directly address the specific and preventable risk posed by natural plants. The Study Guide notes that potted plants, dried flower arrangements, and soil-containing décor should be avoided in areas caring for severely immunocompromised patients.

For the CIC® exam, this question highlights the IP’s responsibility to anticipate environmental infection risks early in facility planning and recommend practical, evidence-based alternatives that protect patient safety without unnecessarily impeding design goals.