Biotinidase Deficiency: Primary Care Guide to a Positive Newborn Screen

Guidance for primary care clinicians receiving a positive newborn screen result Biotinidase is an autosomal recessive inherited disorder in which the body is unable to reuse and recycle biotin, a B complex vitamin found in foods such as liver, egg yolks, nuts, and milk. Biotinidase is responsible for the extraction of biotin from ingested dietary …