Certification Board of Infection Control and Epidemiology (CBIC) 2025 – 400 Free Practice Questions to Pass the Exam

H2O2, or hydrogen peroxide, is known for its effectiveness as a disinfectant, particularly in medical and laboratory settings. It acts as a high-level disinfectant because it can eliminate a broad range of microorganisms, including bacteria, viruses, and fungi.

Hydrogen peroxide works by producing reactive oxygen species, which lead to oxidative stress in microbial cells, causing damage to their proteins, lipids, and nucleic acids. This makes it particularly effective for disinfection purposes, especially when used in concentrations above 3%.

Its high-level disinfection capability is evidenced by its use in sterilizing instruments and surfaces that require a greater degree of microbiological control than what is provided by low- or intermediate-level disinfectants. For example, hydrogen peroxide is sometimes used in vaporized form for terminal sterilization of spaces and equipment, further showcasing its high-level disinfection properties.

Understanding these characteristics helps in categorizing different disinfectants and comprehending their appropriate applications in infection control practices.