| Asepsis | | An infection that develops in a person cared for in any setting where health care is given; the infection is related to receiving health care |
| Biohazardous waste | | The process of destroying all microbes |
| Carrier | | Being free of disease-producing microbes |
| Communicable disease | | A small (micro) living plant or animal (organism) seen only with a microscope; a microbe |
| Contamination | | A disease state resulting from the invasion and growth of microbes in the body |
| Disinfection | | The process of becoming unclean |
| Healthcare-associated infection (HAI) | | A microbe that does not usually cause an infection |
| Infection | | A human or animal that is a reservoir for microbes but does not have the signs and symptoms of infection |
| Medical asepsis | | Items contaminated with blood, body fluids, secretions, or excretions; bio means life, and hazardous means dangerous or harmful |
| Microorganism | | A microbe that is harmful and can cause an infection |
| Non-pathogen | | The process of destroying pathogens |
| Pathogen | | The absence of all microbes |
| Sterile | | Practice used to remove or destroy pathogens and to prevent their spread from one person or place to another person or place; clean technique |
| Sterilization | | A disease caused by pathogens that spread easily; a contagious disease |