pathogen

from WordNet (r) 3.0 (2006)
pathogen
    n 1: any disease-producing agent (especially a virus or
         bacterium or other microorganism)
    
from The Collaborative International Dictionary of English v.0.48
Pathogen \Path"o*gen\, Pathogene \Path"o*gene\, n. [See
   {Pathogenic}.] (Biol.)
   Any microorganism which causes disease; a pathogenic
   organism; an infectious microorganism; a bacterium, virus, or
   other agent which can cause disease by infection; -- opposed
   to {zymogene}. The spelling pathogene is now archaic.
   [1913 Webster + PJC]
    
from Moby Thesaurus II by Grady Ward, 1.0
37 Moby Thesaurus words for "pathogen":
      adenovirus, aerobe, aerobic bacteria, amoeba, anaerobe,
      anaerobic bacteria, bacillus, bacteria, bacterium, bug, coccus,
      disease-producing microorganism, echovirus, enterovirus,
      filterable virus, fungus, germ, gram-negative bacteria,
      gram-positive bacteria, microbe, microorganism, mold,
      nonfilterable virus, picornavirus, protozoa, protozoon, reovirus,
      rhinovirus, rickettsia, spirillum, spirochete, spore,
      staphylococcus, streptococcus, trypanosome, vibrio, virus

    

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