NURSING ANM AND GNM

Detailed explanation-1: -Pathogenicity refers to the ability of an organism to cause disease (ie, harm the host). This ability represents a genetic component of the pathogen and the overt damage done to the host is a property of the host-pathogen interactions. Commensals and opportunistic pathogens lack this inherent ability to cause disease.

Detailed explanation-2: -Pathogenicity is the ability of the pathogen to produce disease. Pathogenicity is expressed by microbes using their virulence, or the degree of the microbe’s pathogenicity. Genetic, biochemical, and structural features that lead to the ability of the pathogen to cause disease are known as its determinants of virulence.

Detailed explanation-3: -One way in which an infectious agent can evade immune surveillance is by altering its antigens; this is particularly important for extracellular pathogens, against which the principal defense is the production of antibody against their surface structures.

Detailed explanation-4: -Virulence is the relative ability of an infectious agent to cause disease. Thus virulent viruses have a greater propensity to cause disease (to be pathogens) in a greater proportion of infected hosts. Virulence determinants or factors are those genes and proteins that play key roles in disease development.