Profound biotinidase deficiency: a rare disease among native Swedes.

Abstract excerpt

Biotinidase deficiency is an autosomal recessive metabolic disorder included in many newborn screening programmes. Prior to the introduction of screening for biotinidase deficiency in Sweden in 2002, the disorder was almost unknown, with only one case diagnosed clinically. Biotinidase activity was measured in dried blood spots with a semiquantitative method using biotin-6-amidoquinoline as substrate. The cutoff...

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