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Correct identification of screening samples

Newborn blood spot screening used to be referred to as the Guthrie test or sometimes just the 'PKU' test. Some health professionals continue to use the historical terminology, which can be confusing.

Blood spot samples collected from patients with phenylketonuria, for monitoring purposes, are analysed by the Willink laboratory and must be addressed to the Willink laboratory not the Newborn Screening laboratory.

If newborn screening samples are labelled as 'PKU', this can lead to the incorrect analysis being performed and/or delays to screening. Please use the correct terminology when making enquiries and sending samples, to avoid confusion.