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 in England. Feudalism as practiced in the Kingdom of England was a state of human society which was formally structured and stratified on the basis of land tenure and the varieties thereof. Society was thus ordered around relationships derived from the holding of land, which landholdings are termed fiefdoms, fiefs, or fees. These political and military customs existed in medieval Europe, having developed around 700 A.D., flourished up to about the first quarter of the 14th century and declined until their