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This technique is often utilized for the Guthrie test, where it is used to soak the blood into pre-printed collection cards known as Guthrie cards. [1] [2] The classical Guthrie test is named after Robert Guthrie, an American bacteriologist and physician who devised it in 1962. The test has been widely used throughout North America and Europe ...
Guthrie became interested in causes and prevention of mental retardation after his son, John, was born disabled in 1947. Despite his work in the field, the cause of his son's disability was never diagnosed. [6] In 1958, Guthrie's 15-month-old niece was diagnosed with phenylketonuria (PKU), a condition in which the body cannot metabolize ...
Initial studies using Robert Guthrie's test for PKU reported high false positive rates that were attributed to a poorly selected type of filter paper. [52] This source of variation has been eliminated in most newborn screening programs through standardization of approved sources of filter paper for use in newborn screening programs.
When I was interviewed on the Today show in 2023, I told Savannah Guthrie, "Levity is my superpower." It's true, although before I was diagnosed, that wasn't always such a good thing.
Since then, Guthrie card samples have been collected routinely from infants in over 20 countries to screen for phenylketonuria and more recently for congenital hypothyroidism, sickle cell disorders and HIV infection. The limitations of sensitivity and specificity when screening such small volumes of blood restricted the use of dried blood spots ...
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As Guthrie pointed out in her post, there’s another red flag about the fake: It spells her name incorrectly. The second book included in the screenshot appeared to be a workbook for her latest ...
Phenylalanine concentrations are routinely screened in newborns by the neonatal heel prick (Guthrie test), which takes a few drops of blood from the heel of the infant. Standard phenylalanine concentrations in unaffected persons are about 2-6mg/dl (120–360 μmol/L) phenylalanine concentrations in those with untreated hyperphenylalaninemia can ...