Which statement best differentiates sterilization from disinfection?

Which statement best differentiates sterilization from disinfection?

• A. Sterilization eliminates all microbial life including spores; disinfection reduces or eliminates most pathogens but may not kill spores
• B. Disinfection is more thorough than sterilization
• C. Sterilization is a cleaning method; disinfection is not
• D. They are the same process

Answer: (A)

The main idea is the level of microbial elimination each process achieves. Sterilization destroys all forms of microbial life, including spores, which are the most resistant. Disinfection reduces or eliminates most pathogens on surfaces but does not guarantee destruction of spores, so some microorganisms may survive. This makes the statement describing sterilization as eliminating all microbial life including spores and disinfection as reducing or eliminating most pathogens but not necessarily killing spores the precise distinction. Sterilization is not simply a cleaning method, and they are not the same process—the former aims for complete destruction, the latter aims to reduce microbial risk.

The main idea is the level of microbial elimination each process achieves. Sterilization destroys all forms of microbial life, including spores, which are the most resistant. Disinfection reduces or eliminates most pathogens on surfaces but does not guarantee destruction of spores, so some microorganisms may survive. This makes the statement describing sterilization as eliminating all microbial life including spores and disinfection as reducing or eliminating most pathogens but not necessarily killing spores the precise distinction. Sterilization is not simply a cleaning method, and they are not the same process—the former aims for complete destruction, the latter aims to reduce microbial risk.