Guthrie test

noun
Guth·​rie test | \ ˈgəth-rē- How to pronounce Guthrie test (audio) \

Medical Definition of Guthrie test

: a test for phenylketonuria in which the plasma phenylalanine of an affected individual reverses the inhibition of a strain of bacteria of the genus Bacillus (B. subtilis) needing it for growth

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