title: Prevalence of atopy and exercise-induced bronchial lability in relatives of patients with cystic fibrosis.
abstract: Skin tests and exercise tests were performed on children with cystic fibrosis (CF) and first-degree relatives of CF children. Positive skin tests were found in 56% of patients and 19% of relatives, but the prevalence of atopy in CF patients bore no relationship to its prevalence in their relatives. Increased 0ronchial lability, mainly due to bronchoconstriction, was present in 54% of patients and 27% of relatives. The results showed that increased prevalence of bronchial lability, but not atopy, is found in first-degree relatives of CF children, and that the abnormal lability and atopy found in CF children does not indicate a familial allergic background.
mesh_terms: D000293:Adolescent; D000328:Adult; D000485:Allergens; D001986:Bronchial Spasm / Q000150:complications*; D002648:Child; D002675:Child, Preschool; D002986:Clinical Trials as Topic; D003550:Cystic Fibrosis / Q000150:complications / Q000235:genetics* / Q000503:physiopathology; D005080:Exercise Test; D005190:Family; D005260:Female; D006801:Humans; D006967:Hypersensitivity / Q000150:complications*; D008297:Male; D008875:Middle Aged; D010290:Parents; D010366:Peak Expiratory Flow Rate / Q000379:methods; D012882:Skin Tests
chemical_list: D000485:Allergens