Serum phenylalanine screening


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Circulatory system
Circulatory system
Alternative Names

Phenylalanine; Phenylalanine - serum


Normal Values

A normal test results in no bacteria growth. This indicates that phenylalanine levels are normal.


What abnormal results mean

Bacteria growth indicates that phenylalanine levels in the infant's blood are too high. PKU is a possibility and further testing will be performed.



Review Date: 10/23/2006
Reviewed By: John Goldenring, MD, MPH, JD, Department of Pediatrics, Children's Hospital, San Diego, CA. Review provided by VeriMed Healthcare Network.


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