title: Incidence of bacterial colonisation after indwelling of double-J ureteral stent.
abstract: OBJECTIVE
  To determine the bacterial colonisation after double-J stent use and the risk factors for bacteriuria linked to the stent.
  
  
  METHODS
  A total of 102 patients (61 men and 41 women, mean age 47.5 ± 14.16) were examined. The stents were removed under aseptic conditions, and a urine culture was obtained before the removal of the stents. After the stents were removed, the upper, central and lower sections were separated, and washing water was sent through the stent.
  
  
  RESULTS
  Bacterial colonisation was found in 29.4% (30 of 102) of the stents. The most frequently observed microorganisms were determined as staphylococcus, coagulase negative (8 of 30) and E. coli (5 of 30). The washing fluid used to clean the interior of the catheter produced pathogens in 8 patients (7.8%), and these pathogens were observed to be the same microorganisms that colonised the outside of the stent. There was no statistical difference between the patients with colonisation and those without in terms of age, gender, duration of stenting and reason for stent insertion.
  
  
  CONCLUSIONS
  Though stent colonisation does not always entail symptomatic urinary tract infections, as shown in our study, the pathogens in the urine culture are the same as those colonising the stent, confirming the reality that colonisation is the main factor in these events. Additionally, according to our study, significant colonisation may be found in the first 3 weeks, contrary to the literature, causing us to consider that urinary tract infections may develop even in the early period.
authors.affiliation: Department of Urology, Recep Tayyip Erdogan University, Rize. hrizaaydin@gmail.com.
authors.forename: Hasan Riza
authors.initials: HR
authors.lastname: Aydin
authors.forename: Lokman
authors.initials: L
authors.lastname: Irkilata
authors.forename: Mustafa
authors.initials: M
authors.lastname: Aydin
authors.forename: Selim
authors.initials: S
authors.lastname: Gorgun
authors.forename: Hüseyin Cihan
authors.initials: HC
authors.lastname: Demirel
authors.forename: Senol
authors.initials: S
authors.lastname: Adanur
authors.forename: Mevlüt
authors.initials: M
authors.lastname: Keles
authors.forename: Aynur
authors.initials: A
authors.lastname: Atilla
authors.forename: Mustafa Kemal
authors.initials: MK
authors.lastname: Atilla
mesh_terms: D000328:Adult; D001437:Bacteriuria / Q000453:epidemiology / Q000382:microbiology*; D002408:Catheters, Indwelling / Q000009:adverse effects*; D004926:Escherichia coli / Q000302:isolation & purification; D004927:Escherichia coli Infections / Q000150:complications* / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D013203:Staphylococcal Infections / Q000150:complications* / Q000453:epidemiology; D013210:Staphylococcus / Q000302:isolation & purification; D015607:Stents / Q000009:adverse effects*; D014421:Turkey / Q000453:epidemiology