What is a fomite?

A fomite is defined as an inanimate object or surface that can carry and transmit infectious agents, such as bacteria and viruses, to individuals who come into contact with it. Common examples of fomites include door handles, computer keyboards, and medical equipment. These objects can become contaminated with pathogens through direct or indirect contact with infected individuals, and subsequently, when someone else touches that surface, they may be exposed to the pathogen.

In contrast, other options describe different concepts. A living carrier of pathogens would refer to a vector or host organism, and a chemical substance used in disinfection pertains to the means by which surfaces are cleaned to eliminate pathogens. A type of vaccine involves biological preparations that provide immunity against specific diseases, making it a distinct entity from a fomite. Understanding the role of fomites in disease transmission is crucial, especially in infection control practices in healthcare and community settings.