- Aggregation substance promotes adherence, phagocytosis, and intracellular survival of Enterococcus faecalis within human macrophages and suppresses respiratory burst. Süssmuth, S.D., Muscholl-Silberhorn, A., Wirth, R., Susa, M., Marre, R., Rozdzinski, E. Infect. Immun. (2000)