title: Relationship between urinary tract infection and self-retaining Double-J catheter colonization.
abstract: OBJECTIVE
  Long-term ureteral stenting is associated with bacterial colonization of both catheter surface and urine. The aim of the study was to evaluate the correlation between the type of bacteria cultured from the Double-J catheter, removed from urinary tract, and cultured from urine. Relationship of the Double-J catheter and urine culture with the duration of Double-J stenting, gender, the presence of diabetes mellitus, as well as the reason for stenting and manner of catheter insertion was also evaluated.
  
  
  METHODS
  Sixty-five patients were enrolled in the study. Urine specimens were cultured before stent insertion and removal. The stent was sent immediately for culture. Data such as age, sex, presence of diabetes mellitus, reason for stenting, and manner of catheterization were recorded.
  
  
  RESULTS
  Urine cultures were positive in 17 cases, while catheter cultures were positive in 64 cases. In 10 cases, the same bacterial species were colonized from urine and stent surface, while in one case, both cultures were negative. In seven patients, both cultures showed different bacterial species, and in 47 cases, urine cultures were negative while the catheters were colonized.
  
  
  CONCLUSIONS
  The only significant correlation was noted between urine culture and stenting duration (P < 0.05). Double-J catheter retention in the urinary tract is associated with a high risk of bacterial colonization, while the risk of urine infection is about fourfold lower. There is a great discrepancy between urine and catheter cultures.
authors.affiliation: 2nd Department of Urology, Medical University of Lodz, Lodz, Poland. rafalkl1@op.pl
authors.forename: Rafal
authors.initials: R
authors.lastname: Klis
authors.forename: Ewa
authors.initials: E
authors.lastname: Korczak-Kozakiewicz
authors.forename: Andrzej
authors.initials: A
authors.lastname: Denys
authors.forename: Marek
authors.initials: M
authors.lastname: Sosnowski
authors.forename: Waldemar
authors.initials: W
authors.lastname: Rozanski
mesh_terms: D000328:Adult; D000368:Aged; D055499:Catheter-Related Infections / Q000209:etiology*; D015169:Colony Count, Microbial; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014546:Urinary Catheterization / Q000009:adverse effects*; D014552:Urinary Tract Infections / Q000209:etiology* / Q000382:microbiology*; D014556:Urine / Q000382:microbiology