The most common organism in spinal infection is from the bacteria Staphylococcus aureus which typically exists on human skin, followed by Escherichia coli. Most spine infections occur in the lumbar spine because of the blood supply to this region of the spine.
Feudalism, a system of political and military relationships, evolved in western Europe. The feudal system was a simple but effective means of medieval government in which the king rented land to barons, who provided him knights and taxes
European feudalism died out with the growth of stronger political states in the sixteenth century, but Japanese feudalism held on until the Meiji Restoration of 1868. A key distinguishing factor between the two is land-ownership.