Which statement best describes the difference between cleaning and disinfection?

• A. Disinfection removes all microorganisms, cleaning removes only debris.
• B. Cleaning reduces dirt and bio-burden; disinfection kills most pathogens.
• C. Disinfection is the same as sterilization.
• D. Cleaning sterilizes equipment.

Answer: (B)

Cleaning removes dirt and bio-burden from surfaces using soap and water to physically lift away contaminants. Disinfection uses chemical agents to kill or inactivate many pathogens, greatly reducing the risk of transmission. The best description is that cleaning lowers debris and microbial load, while disinfection specifically targets pathogens to reduce their numbers. It’s important to note that disinfection does not guarantee that every microorganism is destroyed—that would be sterilization. Keeping that in mind, the other ideas are inaccurate: disinfection is not the same as sterilization, and cleaning alone does not sterilize equipment.