realized in characteristic of inheres in positively regulates disposition molecular entity entry into host through host barriers invasion disposition Alexander Diehl A molecule with the invasion disposition is referred to as an invasion factor or invasin. A disposition borne by a biological macromolecule that is the disposition to facilitate breach of host epithelial barriers or entry into and survival in host cells. Albert Goldfain Lindsay Cowell antimicrobial disposition antiviral disposition antifungal disposition antibacterial disposition antiparasitic disposition protective resistance pathogenic disposition invasive disposition collective disposition contagiousness immunocompetence immunosuppressive disposition disposition to form a non-parasitic colony transmissibility disposition disease