title: [Diagnostic value of a new procalcitonin cord sample-guided algorithm to manage newborns suspected of early-onset infection].
abstract: BACKGROUND
  Diagnosis of early neonatal infection remains an emergency. Since clinical symptoms and biological markers are neither sensitive nor specific, many newborns suspected of infection undergo biological analysis and empirical antibiotic treatment while awaiting results. Recent studies underline the benefit of using procalcitonin (PCT) to differentiate inflammatory diseases and viral infections from bacterial infections. Joram shows that it is possible to go beyond the physiological peak of PCT in the first days of life by measuring PCT concentration in cord blood. The aim of this prospective study was to evaluate a new algorithm integrating the value of PCT in blood cord for taking care of newborns who have suspected infection.
  
  
  METHODS
  The diagnostic value of the new algorithm was compared to the diagnostic value of the algorithm currently in use, by analyzing a 9-month prospective database of 1267 newborns suspected of infection. Infection status was established with the ANAES definition and clinical progression.
  
  
  RESULTS
  Each infected newborn (n=8) would have been treated without delay with the current algorithm (based on ANAES guidelines) and this new algorithm. The new algorithm had the same diagnostic value as the current algorithm (P=0.5) with 87.5% sensitivity (95%CI [52-98]) versus 100% (95%CI [87-100]) and 87.4% specificity (95%CI [85-90]) versus 83.8% (95%CI [81-86]). Fewer biological analyses 13.1% (95%CI [11-16]) versus 42.2% (95%CI [39-45]) were performed with the PCT cord-guided algorithm than with the current algorithm (P<0.05), leading to a 64.2% cost reduction. Antibiotics were significantly less used with the new algorithm: 13.1% (95%CI [11-16]) versus 16.7% (95%CI [14-19]).
  
  
  CONCLUSIONS
  PCT in cord blood could become a new and efficient marker to help neonatologists take care of newborns suspected of infection. These results must be confirmed by a larger multicenter prospective study.
authors.affiliation: Urgences pédiatriques, hôpital Mère-Enfant, CHU de Nantes, boulevard Jean-Monnet, 44093 Nantes cedex, France. blandine_cabaret@yahoo.fr
authors.forename: B
authors.initials: B
authors.lastname: Cabaret
authors.forename: C
authors.initials: C
authors.lastname: Laurans
authors.forename: E
authors.initials: E
authors.lastname: Launay
authors.forename: J-L
authors.initials: JL
authors.lastname: Orsonneau
authors.forename: J-C
authors.initials: JC
authors.lastname: Roze
authors.forename: C
authors.initials: C
authors.lastname: Gras-Le Guen
mesh_terms: D000465:Algorithms; D015415:Biomarkers / Q000097:blood; D002116:Calcitonin / Q000032:analysis*; D015740:Calcitonin Gene-Related Peptide; D042241:Early Diagnosis; D005312:Fetal Blood / Q000737:chemistry*; D006801:Humans; D007231:Infant, Newborn / Q000097:blood; D007234:Infant, Premature / Q000097:blood; D011446:Prospective Studies; D011498:Protein Precursors / Q000032:analysis*; D013290:Streptococcal Infections / Q000175:diagnosis*
chemical_list: D015415:Biomarkers; C000606589:CALCA protein, human; D011498:Protein Precursors; D002116:Calcitonin; D015740:Calcitonin Gene-Related Peptide