What term denotes the complete removal of all micro-organisms from an environment?

What term denotes the complete removal of all micro-organisms from an environment?

• A. Sterile
• B. Aseptic
• C. Sanitary
• D. Clean

Answer: (A)

Complete removal of all micro-organisms from an environment is described by sterilization. Sterilization means no viable organisms remain, including hardy forms like bacterial spores. In practice, this is achieved in labs and medical settings through processes such as autoclaving (high‑pressure steam), dry heat, chemical sterilants, filtration for liquids that are heat‑sensitive, or irradiation. Aseptic refers to techniques and conditions used to prevent contamination during procedures; it aims to keep things microbe-free as much as possible, but it isn’t guaranteed to achieve absolute sterility. Sanitary and clean describe a state of reducing dirt and reducing microbial load to an acceptable level, not the complete elimination of all microorganisms.

Complete removal of all micro-organisms from an environment is described by sterilization. Sterilization means no viable organisms remain, including hardy forms like bacterial spores. In practice, this is achieved in labs and medical settings through processes such as autoclaving (high‑pressure steam), dry heat, chemical sterilants, filtration for liquids that are heat‑sensitive, or irradiation.

Aseptic refers to techniques and conditions used to prevent contamination during procedures; it aims to keep things microbe-free as much as possible, but it isn’t guaranteed to achieve absolute sterility. Sanitary and clean describe a state of reducing dirt and reducing microbial load to an acceptable level, not the complete elimination of all microorganisms.