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 spread from France to Spain, Italy, and later Germany and Eastern Europe. In England the Frankish form was imposed by William I (William the Conqueror) after 1066, although most of the elements of feudalism were already present.eudalism was never a single monolithic system practiced by all societies in Europe. There was a great deal of variation across societies in the practice and rites of the feudal order in nations such as France, the German states, England, Spain, and Russia.