Persistence of urinary tract infections after successful ureteric reimplantation for vesico-ureteric reflux has been reported with an incidence varying between 20-30% according to different series. The Authors analyze their own experience with 99 patients successfully operated for primary VUR during a five year period. In 22 patients (22.2%) there was evidence of persistent UTI, which were almost exclusively low and asymptomatic (91%) and occurring within 6-12 months after the antireflux surgery. A single UTI was documented in over 60% of the patients. There was strong female prevalence (21 patients) and 50% were more than 6 years old. No significant relationship was found between grade of VUR, renal scarring, type of germ and number of preoperative infections and incidence of post-operative UTI. On the other end, voiding and continence disorders and cystoscopic evidence of cystitis cystica would both indicate to be predisposing factors. In these specific cases it is mandatory an accurate pre-operative evaluation of the voiding habits, in order to better define the treatment strategy, not only limited to the surgical correction of the associated reflux.
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