What is the definition of a biocide?

• A. A substance that promotes growth of living organisms
• B. A substance or microorganism that kills or controls the growth of living organisms
• C. A chemical that enhances the properties of antibiotics
• D. A natural product used for cleaning

Answer: (B)

A biocide is defined as a substance or microorganism that kills or controls the growth of living organisms. This definition encompasses a wide range of chemical agents used in various fields, including medicine, agriculture, and sanitation, to manage harmful organisms such as bacteria, viruses, and pests.

When we consider the role of biocides in healthcare and surgical practices, they are essential for maintaining a sterile environment by eliminating or inhibiting pathogenic microorganisms that could lead to infections. Understanding this definition is vital for anyone working with surgical instruments, as ensuring their sterility is crucial for patient safety.

The other options provided do not accurately capture the essence of what a biocide is. Promoting growth of living organisms does not align with the concept of control or eradication. Enhancing the properties of antibiotics pertains to a different function of chemicals in healthcare and does not describe a biocide's action. Finally, while natural products can be used for cleaning, their description as a biocide is too narrow and does not encompass the broader definition necessary in various applications.