A major step in the pathogenesis of listeriosis is -
The formation of antigen-antibody complexes with resultant complement activation and tissue damage
The release of hyaluronidase by L. monocytogenes, which contributes to its dissemination from local sites
The antiphagocytic activity of the L. monocytogenes capsule
The survival and multiplication of L'. monocytogenes within mononuclear phagocytes and host epithelial cells