Pathogen

Related Terms:

microorganism copathogen walking pneumonia fijivirus pathogenesis infectivity attenuation biological weapon guardee bacteria paratransgenesis amylovoran opsonin panculture xenophagy biocontrol immune odontopathogen viroid periodontopathogen syringomycin pathozone immunoglobulin coreceptor superbug seronegative phytodiagnostics coinfection camalexin seroprevalence pathosphere phylodynamics codiversification eukaryophilic actinomycete bioexclusion population fc receptor biopathogen pathos endopathogen organism sanitary infect seroconvert exopathogen fungus uropathogen acinetobactin autoinflammatory passage phytoanticipin athlete's foot postexposure pencycuron subolesin antipathogen pseudoflower polyvalent pathogens antipathogenic phaseolotoxin disease atypical pneumonia nonspecific virus panama disease white rust select agent pathogroup bloodborne protozoa seropositivity nonpathogen hoof fungus steiner's spiral nematode seropositive immune evasion periopathogen

Definitions:

Noun

pathogen

Definition: any disease-producing agent (especially a virus or bacterium or other microorganism)

Definition: Any organism or substance, especially a microorganism, capable of causing disease, such as bacteria, viruses, protozoa or fungi. Microorganisms are not considered to be pathogenic until they have reached a population size that is large enough to cause disease.