An Infectious Agent Already Existing on or in the Body

Question

An infectious agent already existing on or in the body is called ______.
A) exogenous
B) an exotoxin
C) an enterotoxin
D) endogenous
E) axenic

Accepted Answer

Endogenous refers to something originating from within an organism, system, or body. In the context of infectious agents, endogenous means that the agent was already present within the body rather than being acquired from an external source.