Which of the following best describes the purpose of using a disinfectant on your work surface in a microbiology laboratory?

• A. To neutralize chemical spills
• B. To promote the growth of beneficial bacteria
• C. To reduce the number of microorganisms to a safe level
• D. To sterilize the surface by killing all forms of microbial life

Answer: (C)

Verified step by step guidance

1. Understand the definition of a disinfectant: it is a chemical agent used to reduce the number of microorganisms on surfaces to a level considered safe, but it does not necessarily kill all microbial life.
2. Differentiate between disinfection and sterilization: sterilization is the process that kills all forms of microbial life, including spores, while disinfection reduces microbial numbers but may not eliminate all organisms.
3. Consider the purpose of using a disinfectant in a microbiology lab: it is primarily to reduce the risk of contamination and infection by lowering the microbial load on work surfaces.
4. Evaluate the options given: neutralizing chemical spills is a different safety procedure, and promoting growth of beneficial bacteria is not a goal in this context.
5. Conclude that the best description of the purpose of using a disinfectant is to reduce the number of microorganisms to a safe level, ensuring a safer working environment.