<prompt> Xanthogranulomatous pyelonephritis associated stones are due to infection with?ProteusE coliPseudomonasKlebsiella  <response>: ANSWER: A ProteusREF: Tarascon Pocket Urologica by Pamela Ellsworth page 8Xanthogranulomatous pyelonephritis is a chronic condition of the kidney resulting in diffuse renal destruction, a grossly enlarged and nonfunctioning kidney associated with nephrolithiasis. It is thought to start with obstruction stone or sloughed papilla followed by infection most commonly Proteus 