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
feudalism. 1  the economic, political, and social system in medieval Europe, in which land, worked by serfs who were bound to it, was held by vassals in exchange for military and other services given to overlords.2  a society organized like that in medieval Europe. Feudalism was abolished in 1836, and in 1848 complete political union with Piedmont was granted, the viceregal government being suppressed, and the island being divided into three divisions of which Cagliari, Sassari and Nuoro were the capitals. 2  Feudalism was not at any time a national institution.