title: [Preterm delivery and asymptomatic bacteriuria].
abstract: BACKGROUND
  The relation between asymptomatic bacteriuria and spontaneous preterm birth is a controversial topic.
  
  
  OBJECTIVE
  To determine the association between asymptomatic bacteriuria and spontaneous preterm birth.
  
  
  METHODS
  Case-control study in 92 preterm pregnancies and 92 term pregnancies at the Hospital Civil de Guadalajara Dr. Juan I. Menchaca between June 2005 and January 2006. Asymptomatic bacteriuria as a risk factor of spontaneous preterm birth was investigated.
  
  
  RESULTS
  Asymptomatic bacteriuria was more frequent in cases (p = 0.048); with a trend to be associated with preterm birth (OR: 2.39; CI 95: 1.10-5.28). From 92 preterm newborns, 21 (22.8%) had less than 32 weeks, and 71 (77.2%) +/- 32 weeks. Most frequent isolated bacteriae were: E. coli, K. pneumoniae, and P. mirabilis.
  
  
  CONCLUSIONS
  Asymptomatic bacteriuria had a moderate trend to be associated with preterm birth, and infectious processes are only a part of its multiple etiologies.
authors.affiliation: Médico Departamento de Reproducción Humana, Crecimiento y Desarrollo Infantil, Centro Universitario de Ciencias de la Salud, Guadalajara, Jalisco, México. j_jesusm8@yahoo.com.mx
authors.forename: Jesús Pérez
authors.initials: JP
authors.lastname: Molina
authors.forename: Jesús Gaitán
authors.initials: JG
authors.lastname: Meza
authors.forename: Juan Carlos Lona
authors.initials: JC
authors.lastname: Reyes
authors.forename: Guadalupe Panduro
authors.initials: GP
authors.lastname: Barón
authors.forename: Juan Francisco Castro
authors.initials: JF
authors.lastname: Hernández
mesh_terms: D001437:Bacteriuria / Q000150:complications / Q000453:epidemiology*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000453:epidemiology*; D047928:Premature Birth / Q000453:epidemiology* / Q000209:etiology; D055815:Young Adult