title: [Comparative bacteriological and chemical analysis of kidney calculi. Apropos of 135 cases].
abstract: The formation of some urinary tract stones (struvite stones) is known to be related to infection by urease-possessing microorganisms, such as Proteus sp. and some other bacteria. Ureaplasma urealyticum, a genital mycoplasma, contains also urease and is predominantly located in the urogenital tract. Its significance in the production of human urinary stones has not yet been elucidated. In this study, 135 human calculi obtained by surgery were analysed chemically and were cultured for the presence of conventional bacteria and U. urealyticum, 51 were ammonium magnesium phosphate stones and contained Proteus (27), E. coli (4), Staphylococcus epidermidis (3), Streptococcus D (2), Pseudomonas aeruginosa (1), Staphylococcus aureus (1), Corynebacterium (1), Candida albicans (1). U. urealyticum was isolated in one patient, from two different calculi (left and right) taken after an interval of fifteen days. Different bacteria were isolated from other calculi (oxalate, uric acid). This findings suggest that Ureaplasma urealyticum should be looked for in struvite calculi.
mesh_terms: D001419:Bacteria / Q000302:isolation & purification; D001424:Bacterial Infections / Q000150:complications*; D002129:Calcium Oxalate / Q000032:analysis; D006801:Humans; D007669:Kidney Calculi / Q000209:etiology* / Q000378:metabolism / Q000382:microbiology; D008274:Magnesium / Q000032:analysis; D017616:Magnesium Compounds; D009180:Mycoplasmatales Infections / Q000150:complications; D010710:Phosphates / Q000032:analysis; D000069877:Struvite; D014509:Ureaplasma / Q000302:isolation & purification; D014527:Uric Acid / Q000032:analysis
chemical_list: D017616:Magnesium Compounds; D010710:Phosphates; D002129:Calcium Oxalate; D014527:Uric Acid; D000069877:Struvite; D008274:Magnesium
vernacular_title: Analyse comparative bactériologique et chimique de calculs rénaux. A propos de 135 cas.