title: Screening for cystic fibrosis by died blood spot trypsin assay.
abstract: Immunoreactive trypsin was measured in dried blood specimens from 14,000 infants. A second test was performed in 0 . 2% of the population in whom blood trypsin levels were greater than 80 ng/ml. Five infants with cystic fibrosis were then detected, with only one case of persistent hypertrypsinaemia in whom this diagnosis could not be established. No false-negative test results have yet been identified. Seventeen infants with cystic fibrosis were tested inthe first 2 weeks of life, only one of whom had a blood trypsin concentration less than 80 ng/ml.
mesh_terms: D003550:Cystic Fibrosis / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D007231:Infant, Newborn; D008297:Male; D008403:Mass Screening / Q000379:methods*; D014357:Trypsin / Q000097:blood*
chemical_list: D014357:Trypsin