title: Presumed and definite bacteremia in extremely low gestational age newborns.
abstract: OBJECTIVE
  To explore risk patterns for presumed and definite, early and late neonatal bacteremia.
  
  
  METHODS
  We studied 1106 extremely low gestational age newborns who survived until postnatal day 28. We defined early definite bacteremia as a positive bacterial culture in the first week and definite late bacteremia as a positive bacterial culture in week 2, 3 or 4. Bacteremia was presumed if antibiotics were given for more than 72 h despite negative blood cultures.
  
  
  RESULTS
  Risk patterns did not differ much for presumed and definite bacteremia in the first postnatal month. While maternal and pregnancy characteristics were associated with early bacteremia, neonatal comorbidities, especially NEC, were the main antecedents/correlates of late bacteremia. All four categories of bacteremia were associated with younger gestational age and lower birth weight. Infants with presumed and definite bacteremia had similar distributions of days of ventilation and oxygenation.
  
  
  CONCLUSIONS
  Definite and presumed late bacteremias have rather similar risk patterns, while those of early and late bacteremia differ appreciably.
authors: Floating Hospital for Children at Tufts Medical Center, Boston, MA 02111, USA.
authors: Sonal
authors: S
authors: Patel
authors: Olaf
authors: O
authors: Dammann
authors: Camilia R
authors: CR
authors: Martin
authors: Elizabeth N
authors: EN
authors: Allred
authors: Alan
authors: A
authors: Leviton
mesh_terms: D016470:Bacteremia / Q000175:diagnosis*; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007235:Infant, Premature, Diseases / Q000175:diagnosis*; D008297:Male; D012306:Risk; D009626:Terminology as Topic; D013997:Time Factors