] Widespread inbreeding in Saudi Arabia has produced
] several genetic disorders, Saudi public health officials
] said, including the blood diseases of thalassemia, a
] potentially fatal hemoglobin deficiency, and sickle cell
] anemia. Spinal muscular atrophy and diabetes are also
] common, especially in the regions with the longest
] traditions of marriage between relatives. Dr. Sakati said
] she had also found links between inbreeding and deafness
] and muteness.

Its not just the deep south..

Saudi Arabia Awakes to the Perils of Inbreeding