Alport syndrome in most cases is caused by a defect in one or more genes located on the X chromosome. It is usually inherited from the mother, who is a normal carrier.
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Fibromyalgia syndrome
There is no specific virus known to directly cause chronic fatigue syndrome. However, some viruses like Epstein-Barr virus, human herpesvirus 6, and others have been linked to triggering or worsening symptoms in some individuals with chronic fatigue syndrome. The exact cause of chronic fatigue syndrome is not fully understood and likely involves a combination of factors.