The application of PCR amplification and the polymorphic marker KM.19 to dried blood spots: comparison with deletion 508 for the confirmation of the neonatal screening test for cystic fibrosis.


Cystic fibrosis (CF) screening by measurement of immunoreactive trypsin (IRT) lacks specificity: only 9% of hypertrypsinemic neonates have CF. We have studied retrospectively 114 hypertrypsinemic samples (including 37 CF) for KM.19 polymorphic DNA marker and made risk calculations. If the neonate is homozygous for KM.19 allele 2, the risk of CF rises to 55… (More)


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