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)