
suavey wrote:It's actually backed up with some quite sound research if you look at the links (even though it is just a theory at this stage). But schizophrenia is pretty much uniformly distributed worldwide so your assertion that other cultures have more schizophrenia and they do so because of 'incestuous relations' or 'genetic defects' is baseless.
Genetic Disorders in Arab Populations: A 2006 Update
Until recently, infectious or environmental diseases and malnutrition-related disorders constituted the major cause of ill health and mortality in Arab populations. However, progress made in healthcare standards in many Arab countries decreased the impact of such disorders in favor of an increased understanding of the molecular basis of heredity, hence, the better recognition of genetically transmitted conditions as a major cause of morbidity and mortality
(Table 1.1).
Consanguinity
One of the most important factors contributing to the preponderance of genetic disorders in Arab populations is the deep-rooted norm of consanguineous marriages (Figure 1.1). While the rates of consanguineous marriages remain unchanged or have declined in several countries, these rates have increased since the last generation in Algeria (Zaoui and Biemont, 2002), the United Arab Emirates (Al-Gazali et al., 1997), and Yemen (Jurdi and Saxena, 2003). Recently, many studies from the region have drawn strong correlations between consanguinity and hearing loss (Bener et al., 2005), infanto-youthful death rate (Hammami et al., 2005b), respiratory allergies, eczema (Bener and Janahi, 2005), congenital heart defects (Yunis et al., 2006), mental retardation, epilepsy, diabetes (Bener and Hussain, 2006), and many others (reviewed in Tadmouri, 2004a; Tadmouri et al.,
2004).
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