Which term refers to being free of all microorganisms?

Which term refers to being free of all microorganisms?

• A. Clean
• B. Disinfected
• C. Sterile
• D. Contaminated

Answer: (C)

Being free of all microorganisms means true sterility. Sterile denotes there are no viable microorganisms, not even spores, and it is achieved through validated sterilization methods such as autoclaving, chemical sterilants, or radiation, then maintained with strict aseptic technique to protect a sterile field. In contrast, clean refers to the absence of visible dirt but can still harbor microorganisms; disinfected means a high reduction of microbes but not necessarily zero, and some spores may survive depending on the method; contaminated indicates that microorganisms are present. Because only sterile conditions guarantee complete absence of microorganisms, that term is the correct choice.

Being free of all microorganisms means true sterility. Sterile denotes there are no viable microorganisms, not even spores, and it is achieved through validated sterilization methods such as autoclaving, chemical sterilants, or radiation, then maintained with strict aseptic technique to protect a sterile field.

In contrast, clean refers to the absence of visible dirt but can still harbor microorganisms; disinfected means a high reduction of microbes but not necessarily zero, and some spores may survive depending on the method; contaminated indicates that microorganisms are present. Because only sterile conditions guarantee complete absence of microorganisms, that term is the correct choice.