Immunoreactive Trypsin

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Also known as: Trypsin-like immunoreactivity; serum trypsinogen
Formal name: Immunoreactive trypsin (IRT)

At a Glance

Why Get Tested?

To screen for cystic fibrosis (CF) in newborn infants

When to Get Tested?

Sample Required?

A blood sample taken from an infant’s heel, a spot of blood that is put onto filter paper

Test Preparation Needed?