Certification Board of Infection Control and Epidemiology (CBIC) Practice Exam 2025 - Free CBIC Practice Questions and Study Guide

Intermediate-level disinfectants are defined as those that can kill mycobacteria, most viruses, and fungi, but may not effectively eliminate bacterial spores. In the context of the choices provided, the correct selection of alcohol and bleach as intermediate disinfectants encompasses the characteristics of these agents effectively.

Alcohol, particularly isopropyl or ethyl alcohol at concentrations of 60-90%, is a widely recognized disinfectant that has demonstrated efficacy against a spectrum of pathogens, including many bacteria and viruses, though it does not reliably eliminate all spores. Chlorine and hydrogen peroxide are more often considered higher-level disinfectants, particularly hydrogen peroxide at higher concentrations, which can target bacterial spores.

Iodophors are a form of iodine used for disinfection, which can be effective against a range of pathogens, but they are typically categorized as an antiseptic or a low-level disinfectant depending on concentration and contact time. Formaldehyde is also more commonly classified as a high-level disinfectant.

Therefore, the choice of alcohol and bleach appropriately identifies agents that can cross the threshold of intermediate disinfectants, targeting a broad range of pathogens while not being universally effective against spores. Understanding these distinctions is crucial in selecting appropriate disinfectants for various healthcare settings.