title: [Infectious complications in bone marrow transplantation].
abstract: BACKGROUND
  Initially, the aim of the present study was to evaluate the incidence and implicated organisms in the infections in patients receiving a bone marrow transplants (BMT).
  
  
  METHODS
  194 febrile episodes (FE) were evaluated in 115 patients having received a BMT between 1980 and 1987. The analysis was carried out at three different moments: during the period of most marked neutropenia (period I) to the 100th day after BMT (period II) and beyond the 100th day (period III).
  
  
  RESULTS
  The unequivocal confirmation that FE was infective was found in 62% of cases (confirmation was microbiological in 46% and clinical in 16%), while 31% of FE were considered as possible infections and the remaining 7% as doubtful infections. The causative organisms were bacteria (73%), viruses (10%), fungi (8%), and combinations of them (polymicrobial infections) (9%). Gram negative and Gram positive organisms were more common, respectively, in period I and in periods II and III (p = 0.02). Bacteremia was the commonest cause of confirmed infection. The overall mortality rate due to infection was 18%. There was a remarkably high mortality from pneumonia (54%) and a low mortality in patients with sepsis (6%) (p less than 0.0001). The number of FE was lower in patients with autografts than those with allografts (p = 0.08). 33% of the FE in patients with allografts were coincident with acute or chronic graft-versus-host disease, and in two thirds of them infections was confirmed.
  
  
  CONCLUSIONS
  Infection represents a major complication of BMT. The different antimicrobial treatments used in association with bone marrow grafting allowed us to control most FEs. Pneumonia was the most severe infective localization and the leading cause of death. Mortality rate due to sepsis was small.
authors.affiliation: Servicios de Hematología, Hospital Universitario Marqués de Valdecilla, Facultad de Medicina, Universidad de Cantabria, Santander.
authors.forename: M T
authors.initials: MT
authors.lastname: Gómez Casares
authors.forename: M J
authors.initials: MJ
authors.lastname: Alsar
authors.forename: E
authors.initials: E
authors.lastname: Conde
authors.forename: M J
authors.initials: MJ
authors.lastname: Muruzabal
authors.forename: M
authors.initials: M
authors.lastname: Pérez Encinas
authors.forename: J
authors.initials: J
authors.lastname: Baro
authors.forename: A
authors.initials: A
authors.lastname: Iriondo
authors.forename: C
authors.initials: C
authors.lastname: Richard
authors.forename: J
authors.initials: J
authors.lastname: Garijo
authors.forename: J M
authors.initials: JM
authors.lastname: Aguado
mesh_terms: D000293:Adolescent; D000328:Adult; D001424:Bacterial Infections / Q000209:etiology; D016026:Bone Marrow Transplantation / Q000009:adverse effects*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007239:Infections / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D009181:Mycoses / Q000209:etiology; D011379:Prognosis; D012189:Retrospective Studies; D014777:Virus Diseases / Q000209:etiology
vernacular_title: Complicaciones infecciosas en el trasplante de medula ósea.