"Urinary tract infection (UTI) is a common condition in elderly women. Despite the high prevalence of bacteriuria in the elderly, factors predisposing such women to UTI have been underexplored or compared to those identified in premenopausal women. The lack of estrogen, which characterizes the postmenopause, plays an important role in the pathogenesis of this condition. In postmenopausal women with recurrent UTI, therapy with oral or intravaginal estrogen reduced the rate of recurrence significantly. For other patients, an antimicrobial prophylactic regimen should be recommended in addition to hormonal treatment. In the case of an acute UTI, the antimicrobial treatment policy is similar to that in pre-menopausal women. In the case of recurrent UTI, a urological or gynecological evaluation should be performed, in order to exclude malignant or obstructive causes, detrusor failure or a genital infection."