The meaning of Pathogen and additional information.

Pathogene(n.) One of a class of virulent microorganisms or bacteria found in the tissues and fluids in infectious diseases, and supposed to be the cause of the disease; a pathogenic organism; a pathogenic bacterium; -- opposed to zymogene.

Pathogenic(a.) Of or pertaining to pathogeny; producting disease; as, a pathogenic organism; a pathogenic bacterium.