title: Composition of urinary calculi collected in the Durban area.
abstract: Three hundred urinary calculi were collected in the Durban area during the period August 1979--August 1980. Analysis by the X-ray diffraction method showed that their composition is generally similar to that found in the USA and UK. The incidence of uric acid, present in 17% of the calculi, is higher than that found overseas. There is a significantly higher incidence of calcium oxalate in calculi from Indians (83% v. 70% in Whites) while there is a significantly higher incidence of urinary apatite in Whites (35% v. 21% in Indians).
mesh_terms: D001741:Black or African American; D044383:Black People; D002118:Calcium / Q000032:analysis; D002129:Calcium Oxalate / Q000032:analysis; D003553:Cystine / Q000032:analysis; D005260:Female; D006801:Humans; D007194:India / Q000208:ethnology; D008274:Magnesium / Q000032:analysis; D008297:Male; D010070:Oxalates / Q000032:analysis; D010710:Phosphates / Q000032:analysis; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D013019:South Africa; D014527:Uric Acid / Q000032:analysis; D014545:Urinary Calculi / Q000453:epidemiology / Q000378:metabolism*; D044465:White People; D014961:X-Ray Diffraction; D019820:Xanthine; D014970:Xanthines / Q000032:analysis
chemical_list: D010070:Oxalates; D010710:Phosphates; D000644:Quaternary Ammonium Compounds; D014970:Xanthines; C016189:whewellite; D019820:Xanthine; D002129:Calcium Oxalate; D014527:Uric Acid; D003553:Cystine; D008274:Magnesium; D002118:Calcium