The Guthrie Test for Early Diagnosis of Phenylketonuria ...
Mar 30, 2017 · Keywords: Newborn Screening. The Guthrie Test for Early Diagnosis of Phenylketonuria. The Guthrie test, also called the PKU test, is a diagnostic tool to test infants for phenylketonuria a few days after birth. To administer the Guthrie test, doctors use Guthrie cards to collect capillary blood from an infant's heel, and the cards are saved for later testing.
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