http://link.springer.de/link/service/journals/10072/bibs/1022002/10220175.htm
Neurological Sciences
Abstract Volume 22 Issue 2 (2001)
pp 175-177
G. Savettieri, P. Ragonese, P. Aridon,
G. Salemi
Institute of Neuropsychiatry, University
of Palermo, Via Gaetano La Loggia 1, I-90129 Palermo, Italy
Abstract.
From epidemiological data obtained
over more than 20 years by surveys conducted in different parts of Sicily,
it is evident that Sicily is a high-risk area for multiple sclerosis (MS).
This is in sharp contrast with the
gradient hypothesis.
High frequencies have been found
in different parts of the island having different geoclimatic features,
but at least two cities (Monreale and Enna) had had a prolonged Norman
domination.
This is in agreement with the hypothesis
that MS originated in Northern Europe and spread around the world throughout
the raids of the northern peoples.
The increase in frequency estimated
by follow-up and incidence studies is well established and is only in part
linked to the improvement in diagnostic techniques.
Finally, it is noteworthy that in
the islands of Malta, a few sea miles away from Sicily, the MS prevalence
rates are in the range of 4-8 cases per 100 000 persons.
This occurrence represents a natural
model to investigate MS etiology through analytic studies and genetic analyses.
© Springer-Verlag Italia 2001