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Type 1 diabetes: immune mediated and idiopathic forms of b cell dysfunction, which
lead to absolute insulin deficiency. This is an autoimmune mediated disease process
which gives rise to absolute deficiency of insulin and therefore total dependancy upon
insulin for survival.
Type 2 diabetes: disease of adult onset, which may originate from insulin resistance
and relative insulin deficiency or from a secretory defect. This is a disease, which
appears to have a very strong genetic predisposition and is caused by a combination
of inadequate insulin secretion and an insensitvity of the body tissues to insulin so
leaving patients with this condition relatively deficient in insulin.
Type 3 diabetes: this covers a wide range of specific types of diabetes including
various genetic defects in insulin action, and diseases of the exocrine pancreas.
Type 4 diabetes is gestational diabetes.

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