Host-pathogen interaction
Study susceptibility, immunity and pathogen traits as coupled biological processes rather than properties of one side alone.
Subject
Purpose
Infectious disease studied through hosts, pathogens, vectors, environments, transmission networks and ecological change across populations and species.
Structure
Components → constraints → flows → control → failure
Disease ecology extends epidemiology by asking how species interactions, landscapes and environmental change alter pathogen persistence and spread.
Study susceptibility, immunity and pathogen traits as coupled biological processes rather than properties of one side alone.
Distinguish direct, environmental and vector-borne transmission and the ecological conditions each requires.
Track how pathogens persist across species and how spillover risk depends on contact structure and competence.
Connect habitat, seasonality and environmental change to host movement, vector abundance and transmission opportunity.
Evaluate how vaccination, vector control, land-use change or culling alter ecological feedbacks rather than assuming one-step effects.
reservoir host ≠ source of every human case
spillover ≠ sustained transmission
R₀ ≠ fixed pathogen property
Which ecological variables change transmission versus merely correlate with case counts?
How do multi-host communities amplify or dilute pathogen persistence?
When does environmental change alter contact rates, susceptibility or both?
Combine field ecology, surveillance, experiments and transmission models; host detection bias and unobserved contact structure must be treated as uncertainty.