Immunoreactive Trypsin
Also known as: Trypsin-like immunoreactivity; serum trypsinogen
Formal name: Immunoreactive trypsin (IRT)
Related tests: Sweat Chloride, CF gene mutation
At a Glance
Why Get Tested?
To screen for cystic fibrosis (CF) in newborn infants
When to Get Tested?
When a newborn infant has signs and symptoms of cystic fibrosis particularly when it passes no stools in the first 24 to 48 hours of life (meconium ileus) or where there is a high risk of the baby having the cystic fibrosis due to family history
Sample Required?
A blood sample taken from an infant’s heel, a spot of blood that is put onto filter paper
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