Comparison of urinary tract infection in calcium oxalate and calcium phosphate stone formers.
To compare the frequency of urine infection in calcium oxalate and calcium phosphate stone formers, we reviewed charts from patients whose last renal stone submitted for analysis was predominantly composed of calcium phosphate in 118 and of calcium oxalate in 223. Positive cultures were commoner, but not significantly, in the phosphate than the oxalate stone formers, both in men (17 vs. 7.6%) and women (22 vs. 15%). Bacteria frequently producing urease were found in only 4% of the phosphate group. Urine leucocytes were slightly more frequent in the oxalate group for men and significantly so for women. The results do not support the concept that calcium phosphate stones are mainly due to infection with urease-producing or other bacteria.
General Hospital, Memorial University of Newfoundland, St. John's, Canada.
M H
MH
Gault
M D
MD
Paul
L
L
Longerich
D002129:Calcium Oxalate; D002130:Calcium Phosphates; D004927:Escherichia coli Infections / Q000150:complications*; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000150:complications* / Q000503:physiopathology; D008297:Male; D012189:Retrospective Studies; D012737:Sex Factors; D014552:Urinary Tract Infections / Q000150:complications*
D002130:Calcium Phosphates; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; D002129:Calcium Oxalate; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; C485829:calcium phosphate, dibasic, anhydrous