Disinfection is best described as destroying most but not necessarily all harmful organisms on which surfaces?

• A. Skin surfaces
• B. Internal tissues
• C. Hair and clothing
• D. Environmental surfaces

Answer: (D)

Disinfection means reducing the number of harmful microorganisms on inanimate surfaces to a level that’s considered safe. It doesn’t guarantee complete destruction of every organism, especially resistant forms, but it lowers the risk enough for everyday environments. This is why disinfection is described as applying to environmental surfaces—nonliving objects like countertops, furniture, and equipment. It isn’t used on living tissues (which is antisepsis or degerming) and isn’t the method relied on for internal tissues or for items like hair and clothing, where different cleaning or sterilization approaches are appropriate.