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FOUNDATIONAL TERM

Pathogen

病原体

An infectious agent capable of causing infection under relevant conditions.

Study this concept in context

68 · Infection: pathogens, hosts and transmission

Infection reflects an interaction among an agent, its route of entry, host defences, and the environment. These relationships shape illness and opportunities for transmission.

Sources

Definitions come from the published lessons. Read the linked lesson for mechanisms, conditions and examples.