zipper mechanism
passive process
enduces receptor mediated endocytosis
bac first sticks tightly to host cell surface with invasins, then cell envelops around bac
need active cytoskeleton
trigger mechanism
bac inject protein into host cell, triggering polumeristaiton of actin, n invaginations of cell membrane called ruffles, n bac enters
active process
bac secrete T3SS
bacteria secretion system
type 3= needle thing that pump things like toxins into cell
endotoxin
in gram negative bac