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. n. 1. (Historical Terms) Also called: feudal system the legal and social system that evolved in W Europe in the 8th and 9th centuries, in which vassals were protected and maintained by their lords, usually through the granting of fiefs, and were required to serve under them in war.See also vassalage, fief.eudalism. n. 1. (Historical Terms) Also called: feudal system the legal and social system that evolved in W Europe in the 8th and 9th centuries, in which vassals were protected and maintained by their lords, usually through the granting of fiefs, and were required to serve under them in war. See also vassalage, fief.