Exogenous behavior is the behavior that is derived externally and outside the body. Exogenous behavior can also be in reference to outside sources that effect us, such as temperature and sunlight.

exogenous pathogens.

Exogenous infection is a bacterial infection that develops from the outside of the body. Exogenous bacteria are foodborne and waterborne which can be consumed directly or through secondary host.

Exogenous is the use of something from outside the organism - such as insulin. A link with a longer definition is below.

Plasmids.