What is the primary purpose of disinfection?

• A. To completely eliminate all microorganisms from surfaces
• B. To remove all organic matter and debris
• C. Eliminate or reduce the number of harmful microorganisms on surfaces to prevent the spread of infectious disease
• D. To sterilize equipment by heat

Answer: (C)

Disinfection is about reducing or destroying disease-causing microorganisms on inanimate surfaces to lower the risk of spreading infections. It targets harmful microbes such as bacteria, viruses, and fungi, aiming to bring their numbers down to safe levels so transmission is less likely. It’s not meant to kill every microorganism or achieve sterility—that higher standard is sterilization. Cleaning, which removes dirt and organic matter, often comes first because remaining debris can shield microbes and reduce disinfectant effectiveness. For disinfection to work well, you must follow product instructions on concentration and contact time, and consider the surface type. In short, the goal is to lower the amount of harmful microbes on surfaces to prevent infectious disease spread.