10 - 100 needle complexes/cell
||Bacteria Salmonella typhimurium
||Kubori T et al., Supramolecular structure of the Salmonella typhimurium type III protein secretion system. Science. 1998 Apr 24 280(5363):602-5 p.603 left column top paragraphPubMed ID9554854
||Abstract: "Electron microscopy revealed supramolecular structures spanning the inner and outer membranes of flagellated and nonflagellated strains, such structures were not detected in strains carrying null mutations in components of the type III apparatus."
||P.603 left column top paragraph: "There were 10 to 100 needle complexes
per cell, and these complexes were distinguishable from flagellar basal bodies of osmotically shocked wild-type S. typhimurium cells (Fig. 1D)."