Which statement best differentiates disinfection from sterilization?

• A. Disinfection reduces or eliminates pathogenic organisms on surfaces; sterilization eliminates all forms of microbial life, including spores.
• B. Disinfection eliminates all forms of microbial life including spores; sterilization reduces pathogens on surfaces.
• C. Disinfection only targets viruses; sterilization targets bacteria.
• D. Disinfection and sterilization are the same process.

Answer: (A)

Disinfection and sterilization differ in how completely they remove microorganisms. Disinfection lowers or eliminates pathogenic organisms on inanimate surfaces, reducing the risk of infection but not necessarily killing every microorganism or the hardy spores. Sterilization goes further, destroying all forms of microbial life, including bacterial spores, which are highly resistant. This distinction matters for items and surfaces in contact with patients: items that penetrate body tissues must be sterilized, while many surfaces and noncritical tools are adequately disinfected. In practice, many disinfectants don’t guarantee spore destruction, whereas proper sterilization methods like autoclaving or validated chemical sterilants achieve complete sterilization.