“Pathogenic Ecology” is “the natural relationship to animate and inanimate components of the environment that support the sustainment of a pathogen in the environment or prohibit its sustainment, or their interactions with an introduced pathogen that allow for the establishment of disease in a new environment.”
Biosurveillance: defined by Homeland Security Presidential Directive 21 (HSPD-21) is “active data-gathering with appropriate analysis and interpretation of biosphere data that might relate to disease activity and threats to human or animal health—whether infectious, toxic,..”October 18, 2007, Presidential Directive by President George W. Bush.
Global Biosurveillance 