We use cookies to help us improve the website and your experience using it. You may delete and block all cookies from this site at any time. However, please note this may result in parts of the site no longer working correctly. If you continue without changing your settings we will assume you are happy to receive all cookies on this site.


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.