Residents on a group of Scottish islands people have the world's highest incidence of multiple sclerosis. Scientists have found that this should not blame the Vikings.
Researchers from the University of Edinburgh found that one out of every 170 residents of the Orkney Islands in Scotland there multiple sclerosis . This is the highest incidence in the world. As scientists believe, this tendency to develop an incurable neurological disease is due to a bad heredity locals.
Orkney Islands in the past have often been used by the Vikings as a base for his campaigns, and under Norwegian control, they remained until 1231. Half of the local population has ancestors natives of Scandinavia, and there are places where there is a very high incidence of multiple sclerosis .
But other than that, the cause of "anomalies Orkney" is also a lack of vitamin D, most of which is produced in the body naturally when exposed to sunlight. Local island sun rarely indulges here often dominates cloudy. Scientists believe that the 20-thousand population of the islands is a victim of inherited genetic defects. And they have developed, including, thanks to practice here once incest.
"Some people explain the high incidence of MS bad water or soil, but it is not, - said study author Dr. Jim Wilson. - In the past people lived very close community, where almost all were related to one another, and marriages within that community. This led to more vulnerable to disease genes. Even if now we can not yet identify the same genetic factor as the cause of the high incidence of MS, this does not mean that it does not exist. "
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