title: Resting energy expenditure in young patients with cystic fibrosis receiving antibiotic therapy for acute respiratory exacerbations.
abstract: BACKGROUND
  patients with cystic fibrosis commonly have severe malnutrition and growth retardation. Among possible causes of these manifestations are low caloric intake, loss of nutrients and increased resting energy expenditure. This study was designed to assess the influence of antibiotic therapy for infectious exacerbations on resting energy expenditure in young patients with cystic fibrosis.
  
  
  METHODS
  We studied 17 patients with cystic fibrosis (mean age, 13.6 years). All were hospitalized to receive intravenous antibiotic therapy (mean duration, 2 weeks) for acute respiratory exacerbations. At the beginning of therapy and after it ended, all patients underwent blood chemical tests, anthropometrical measures, determination of body composition by bioelectrical impedance, spirometry, and indirect calorimetry.
  
  
  RESULTS
  Antibiotic therapy led to a significant improvement in biochemical, spirometric variables and in estimated calorimetry measurements expressed in relation to fat-free mass. These findings suggest that infective exacerbations are among the causes of increased resting energy expenditure in young patients with cystic fibrosis.
  
  
  CONCLUSIONS
  Indirect calorimetry may prove useful in the diagnosis of infective exacerbations and in monitoring the effect of antibiotic therapy in patients with cystic fibrosis.
authors.affiliation: Department of Pediatric Gastroenterology, Bambino Gesù Hospital, Rome, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Castro
authors.forename: A
authors.initials: A
authors.lastname: Diamanti
authors.forename: M
authors.initials: M
authors.lastname: Gambarara
authors.forename: S
authors.initials: S
authors.lastname: Bella
authors.forename: V
authors.initials: V
authors.lastname: Lucidi
authors.forename: B
authors.initials: B
authors.lastname: Papadatou
authors.forename: F
authors.initials: F
authors.lastname: Ferretti
authors.forename: P
authors.initials: P
authors.lastname: Rosati
authors.forename: E
authors.initials: E
authors.lastname: Rupi
mesh_terms: D000293:Adolescent; D000328:Adult; D000886:Anthropometry; D001481:Basal Metabolism; D002153:Calorimetry, Indirect / Q000379:methods*; D002648:Child; D003550:Cystic Fibrosis / Q000150:complications / Q000188:drug therapy* / Q000378:metabolism; D017097:Electric Impedance; D004734:Energy Metabolism / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000379:methods; D009748:Nutrition Disorders / Q000209:etiology; D012141:Respiratory Tract Infections / Q000188:drug therapy* / Q000209:etiology / Q000378:metabolism*