Which term describes a substance that prevents infections by reducing the number of microorganisms on living tissue?

Study for the Missouri EFDA Basic Skills Test. Use flashcards and multiple choice questions, each with hints and explanations. Prepare effectively for your certification exam!

Antiseptics are agents applied to living tissue to reduce the number of microorganisms and help prevent infections during procedures. They’re used on skin or mucous membranes to lower microbial load without damaging tissue. This differs from disinfectants, which are used on inanimate surfaces, and sterilants, which aim to destroy all microorganisms (including spores) on instruments. Antibiotics treat infections inside the body, not as preventative skin prep. So, for a substance applied to living tissue to prevent infections by reducing microorganisms, antiseptic is the correct term. Examples include chlorhexidine, iodine, and alcohol-based preparations used on the skin before procedures.