title: Prevalence and clinical course of typical hemolytic uremic syndrome among sibling.
abstract: BACKGROUND
  Hemolytic uremic syndrome (HUS) isaninfectious disease caused by Shiga toxin-producing Escherichia coli. The objective of this study was to assess the risk of transmission and clinical course between siblings with typical HUS.
  
  
  METHODS
  Medical records of children with typical HUS between 1997 and 2012 were reviewed. Sibling pairs were established as inclusion criteria. A severity score was defined.
  
  
  RESULTS
  A total of 133 patients with HUS were recorded; 40 had siblings and 4 progressed to HUS (10%). The mean age of the 4 sibling pairs was 29.3 months old (SD ± 11.5); 5 (62.5%) were girls. The mean time between each case was 5.7 days (SD ± 3). HUS was more severe in the siblings who became infected in the second place.
  
  
  CONCLUSIONS
  The risk of HUS transmission between siblings was 10%, and the clinical course of the second sibling was less favorable.
authors.affiliation: Servicio de Clínica Pediátrica, Hospital Italiano de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina. alfredo.eymann@gmail.com.
authors.forename: Alfredo
authors.initials: A
authors.lastname: Eymann
authors.affiliation: Servicio de Clínica Pediátrica, Hospital Italiano de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.
authors.forename: Paula
authors.initials: P
authors.lastname: Coccia
authors.affiliation: Servicio de Nefrología Pediátrica, Hospital Italiano de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.
authors.forename: Claudia
authors.initials: C
authors.lastname: Raddavero
authors.affiliation: Servicio de Nefrología Pediátrica, Hospital Italiano de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Lafi
authors.affiliation: Servicio de Nefrología Pediátrica, Hospital Italiano de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.
authors.forename: Verónica
authors.initials: V
authors.lastname: Ferraris
authors.affiliation: Servicio de Nefrología Pediátrica, Hospital Italiano de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.
authors.forename: José
authors.initials: J
authors.lastname: Ramírez
authors.affiliation: Servicio de Nefrología Pediátrica, Hospital Italiano de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.
authors.forename: Jorge
authors.initials: J
authors.lastname: Ferraris
mesh_terms: D002675:Child, Preschool; D005260:Female; D006463:Hemolytic-Uremic Syndrome / Q000453:epidemiology* / Q000235:genetics; D006801:Humans; D007223:Infant; D008297:Male; D015995:Prevalence; D012189:Retrospective Studies; D012306:Risk
keywords: Argentina; Escherichia coli; Hemolytic uremic syndrome; Risk; Siblings