Blood is taken from a two-week-old baby to test for<unk> <unk>  is commonly included in the newborn screening panel of many countries, with varied detection techniques. Most babies in developed countries are screened for<unk>  soon after birth. Screening for<unk>  is done with bacterial inhibition assay (Guthrie test), immunoassays using fluorometric or photometric detection, or amino acid measurement using tandem mass spectrometry (MS/MS). Measurements done using MS/MS determine the concentration of Phe and the ratio of Phe to tyrosine, the ratio will be elevated in<unk> .
Phenylketonuria
Hawkinsinuria
Homocystinuria
Alkaptonuria
3-Methylglutaconic aciduria
2-Hydroxyglutaric aciduria
Alpha-aminoadipic and alpha-ketoadipic aciduria
Aspartylglucosaminuria