title: [Correlation between urinary stones and urinary tract infections].
abstract: OBJECTIVE
  To explore the correlation of urinary stones and urinary tract infections.
  
  
  METHODS
  300 cases with urinary tract stones received in our hospital from Feb. 2010 to Oct. 2013 were chosen as study samples. Urine routine index, situation of urine positivity and urinary tract infection after surgery were analyzed while, intraoperative cotton swabs were tested after being dipped in liquid near stones. Main components of stones in non-infected and infected stone group were analyzed and compared. Data on urolithiasis was collected.
  
  
  RESULTS
  96 infected stones were found in 300 patients, accounting for 32%, which including 35 cases of E. coli (36.5%), 28 cases of Staphylococcus epidermidis (29.2%), and 15 cases of Proteus mirabilis (15.6%). Numbers of urine abnormalities, urine positivities, positive intraoperative cotton swabs and urinary tract infections in patients in the group with infected stones, were significantly higher than in the group without infected stones and the differences were statistically significant (χ² = 8.203, 73.99, 178.9, 24.26, P < 0.05). The incidence rates of hexahydrate magnesium ammonium phosphate, carbonate apatite and hydroxyapatite stones in the group with infected stones were significantly higher than those in the non-infected-rock group while the incidence rates of calcium oxalate and uric acid stones were found significantly lower than those in the non-infected-stone group, with differences statistically significant (χ² = 167.6, 21.00, 8.586, 73.17, 48.79, P < 0.05).
  
  
  CONCLUSIONS
  Bacteria could cause urinary tract stones, and infected stones were always associated with urinary tract infections. Bacteria detection in patients with urinary calculi was particularly important to avoid the urinary tract infections.
authors: Department of Urology, Tangshan Workers'Hospital, Tangshan 063000, China. Email: chplfbwz@126.com.
authors: Peilin
authors: P
authors: Chen
authors: Department of Urology,Affiliated Hospital of Hebei Union University.
authors: Liguo
authors: L
authors: Zhang
authors: Department of Urology, Tangshan Workers'Hospital, Tangshan 063000, China.
authors: Bin
authors: B
authors: Meng
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014545:Urinary Calculi / Q000453:epidemiology* / Q000382:microbiology; D014552:Urinary Tract Infections / Q000453:epidemiology* / Q000382:microbiology; D055815:Young Adult