Virulence, the degree of pathogenicity of a microorganism, representing the relative capacity of that organism to cause damage and severity of disease in a host., Colonization, the establishment of the pathogen at the appropriate portal of entry., Pathogenicity, the ability of a microorganism to cause disease in a host., Infection, the invasion, establishment, and multiplication of microorganisms within host tissues, which may or may not result in clinical disease., Disease, pathological condition characterized by structural or functional impairment of tissues or organs, resulting from identifiable causes and often associated with signs and/or symptoms., Pathogenesis, the biological and molecular mechanisms by which a disease develops from its initiating cause, Toxigenicity, Ability to produce toxins, Invasiveness, Ability to spread within host tissues, Immune Evasion, Capacity to avoid or resist host defenses, Immune Subversion, the ability of a pathogen to manipulate, alter, or hijack host cellular and immune processes to promote its own survival, replication, and persistence.

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