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
Europeâs medieval period (also called the Middle Ages) is commonly. regarded as starting in the late 6th century. CE. It lasted about 1000 years. A number of factors influenced the societies of medieval Europe. The most. important were feudalism, manorialism , and the spread of Christianity. These factors helped to preserve social order and stability for many. centuries. By the start of the second millennium. (1000 CE), the barbarian raids common in the.