What defines an endogenous infection?

An endogenous infection is defined by its origin within the host's own body. This type of infection occurs when the body’s own flora, which normally resides harmlessly in various sites, becomes pathogenic. For instance, the bacteria that usually live in the intestines can lead to an infection if they enter the bloodstream due to a rupture or other health issues. This is distinct from other types of infections, such as exogenous infections, which are introduced from external sources. Understanding this concept is crucial for infection control practices, as it emphasizes the importance of maintaining a healthy balance of microbiota and recognizing situations where natural flora can become harmful.