the severity and frequency of the sequelae of urinary schistosomiasis ( hydroureter , hydronephrosis , bladder ulcer , and polyposis ) and of its complications ( bacterial urinary tract infection , renal failure , urothelial cancers ) depend on the intensity of infection , i.e. , worm burden and tissue egg burden , and the duration of infection .
C0334108
polyposis
C0040300
tissue