Hi sir, I have gone through rt laparoscopic pyloplast in jan 2011 due puj obstruction. Before surgery my gfr was 35 for right kidney and left was normal. After laparoscopic it changed to 17% then after 1 month balloon dilatation done. But no improvement then in month of may 2011 open pyloplasty done then again grf becomes 34. Now in 2021 start im month of aug uti starts Dr. given me levoflox for 7 days. Then after 6-7 days again uti appears then niftran for 21 days given. But after some days again uti appears. Ultrasound done in month of aug. Prostate size 18. 10 cc urine residual after void. Then in month sep again ultrasound dome prostate size 22.15 cc post void. Now in month of oct ultra sound done again 2-3 days back 165 ml post void and pre void 550 ml. Rgu+mcu also done mild narrowing urethra stricture insignificant. Prostate size 30. Sir now kindly suggest why this recurrent uti since last 3 month. Dtpa renal scan donal last 6 month back egfr 83%. Right kidney 53 and left 30.