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 system broke down gradually. It was not completely destroyed in France until the French Revolution (1789), and it persisted in Germany until 1848 and in Russia until 1917. Many relics of feudalism still persist, and its influence remains on the institutions of Western Europe.he important features of feudalism were similar throughout, but there existed definite national differences. Feudalism continued in all parts of Europe until the end of the 14th cent. The concentration of power in the hands of a few was always a great disruptive force in the feudal system.