Infections of the urinary tract in @entity1 : a prospective, longitudinal study of 235 XXXX observed for 1-19 years.

@entity1 @entity281
A prospective long-term study was conducted of 235 young to middle-aged @entity1 with past histories of and/or active @entity281 of the urinary tract. The present report defines certain characteristics of the population and of the 1,018 confirmed @entity281 of the urinary tract that occurred during observation periods ranging from 1.1 to 19.4 years (mean, 7.4 yr). The population could be divided into 3 groups: @entity1 with confirmed @entity281 who did (Group 1, n = 19) or did not (Group 2, n = 191) receive courses of antimicrobial prophylaxis and those who did not have confirmed @entity281 (Group 3, n = 25). The 3 groups differed significantly only in their mean infection rates per year (3.1, 0.8, and 0.0, respectively). The number of @entity281 among individual @entity1 ranged from 0 to 42. The patterns of recurrent @entity281 among individual @entity1 ranged widely and were not predictable. Clusters of @entity281 occurred in 45.7% of the @entity1 and ranged in size from 2 to 12 @entity281 per cluster. The proportions of different infecting organisms and clinical syndromes were similar to those reported by others. accounted for the great majority of @entity281 . Eighty-five percent of the isolates of tested were serologically classified. A total of 50 different O groups were identified. Three (O4, O6, and O75) of the 131 potential O groups accounted for 49% of the isolates that could be classified. In each of the 4 clinical syndromes, these same 3 O groups were also the most frequently identified. The ability to classify serologically the infecting isolates of permitted a more complete definition of the complexity of patterns of recurrent @entity281 among individual @entity1 . The findings in the present study are compared with those in the literature.
