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
The decline of feudalism. The decline of feudalism was a general phenomenon of European history that owed as much to the economic transformations of the twelfth and thirteenth centuries as it did to features inherent in the feudal system itself.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.