Renal calculus seen in proteus infection is
Urease producing organisms eg :- proteus ,psuedomonas , and staphylococcus , break down urea to produce ammonia and co2.The urine becomes alkaline which promotes formation of struvite calculi ( magnesium ammonium phosphate ) which grow to become staghorn calculi.E coli never forms struvite stones ref :- Bailey and Love 27th edition .chapter 72 . pg no 1406
Uric acid
Xanthine
Triple phosphate
Calcium
Urology