title: Bacteriology of upper urinary tract stones.
abstract: Extensive cultures of stones and urine were performed in 215 patients who underwent an operation for upper urinary tract calculi. Microorganisms could be cultured from the stone in 1 of every 3 patients. Despite the extended culture technique urease-producing microorganisms could be cultured from the stone in only 48% of the patients with calculi that contained magnesium ammonium phosphate. This finding suggests that an infection with urease-producing microorganisms is not obligatory for the formation of this type of stone. Of the patients with calcium oxalate phosphate stones 32% had positive stone cultures, which distinguished them from patients with pure calcium oxalate stones, only 8% of whom had a positive stone culture (p less than 0.001).
authors.affiliation: Department of Urology, Sahlgrenska sjukhuset, University of Göteborg, Sweden.
authors.forename: J
authors.initials: J
authors.lastname: Hugosson
authors.forename: L
authors.initials: L
authors.lastname: Grenabo
authors.forename: H
authors.initials: H
authors.lastname: Hedelin
authors.forename: S
authors.initials: S
authors.lastname: Pettersson
authors.forename: S
authors.initials: S
authors.lastname: Seeberg
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001419:Bacteria / Q000201:enzymology / Q000302:isolation & purification*; D001437:Bacteriuria / Q000382:microbiology; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000032:analysis / Q000382:microbiology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D014510:Urease / Q000096:biosynthesis; D014514:Ureteral Calculi / Q000032:analysis / Q000382:microbiology* / Q000601:surgery
chemical_list: D014510:Urease