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Year : 2001  |  Volume : 17  |  Issue : 2  |  Page : 111-117

Bacteriology and chemical composition of renal calculi accompanying urinary tract infection

Department of Microbiology, Dr S.N. Medical College, Jodhpur, India

Correspondence Address:
Aruna Solanki
18, Amarnath Building, Opposite M.G. Hospital, Jodhpur- (Rajasthan) - 342 001
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Source of Support: None, Conflict of Interest: None

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Bacteriological study of pre-operative urine and stone along with chemical analysis of stones have been perforned in 100 cases of urolithiasis. Although the rate of infection accompanying stone formation is more in female (50%) in comparison to male (27.9%) but over­all incidence of stone formation is more in male (86%). The crushed stone core culture was positive in 31 cases (31 %) and out of these cases, 23 cases (74.19%) showed positive urine culture. 15 cases (48.38%) of stone positive culture showed same organism which were also isolated from pre-operative urine culture whereas 8 (25.80%) cases of culture positive stones showed dif­ferent micro-organisms than pre-operative urine cul­ture. Chemical analysis revealed increased incidence of mixed stone composed of calcium oxalate and cal­cium phosphate (51 %). The occurence of pure triple phosphate stone was only 13%. The commonest pathogen recovered from pre-operative urine culture and stone culture was E.coli (32.25% and 21.73%)followed by Pseudomonas (22.58% and 17.39%) from mixed stones composed of calcium oxalate with cal­cium phosphate and triple phosphate. Out of 31 infection stones, 13 stones which were composed mainly of triple phosphate showed highest incidence of infection (84.62%).

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