Problem:
The O antigen is synthesised by Pathology islands (PAI). O antigen may be a factor why Shigella survives the passage through host defences. I am interested in which step of pathogenesis.
There are Bacterial ATPase (actin tail, intracellular movement), M-cell (enter) ...-> extracellular movement.
Required:
Question: Where can the O antigen affect in Shigella?
Could someone explain this to me?