pathogen definition

  • noun:
    • a representative that triggers infection, specifically a living microorganism particularly a bacterium or fungi.
    • Any system or substance, particularly a microorganism, capable of causing disease, such germs, viruses, protozoa or fungi. Microorganisms aren't considered to be pathogenic until they have achieved a population size this is certainly big enough resulting in infection.
    • Any microorganism which in turn causes illness; a pathogenic system; an infectious microorganism; a bacterium, virus, or other agent which could trigger condition by infection; -- in opposition to zymogene. The spelling pathogene is archaic.
    • any disease-producing representative (especially a virus or bacterium or other microorganism)

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