[Retrospective studies of urinary infections in the elderly].

Retrospective analysis of the urinary infection course involved 55 elderly patients. The patients were divided into groups basing on the clinical diagnosis. These groups included patients with obstructive chronic pyelonephritis and the patients with lower urinary infections. It was found that reinfections occur in the elderly patients with both upper and lower urinary infections while recurrence is seen in case of the upper urinary infections. Bacteriuria is significantly more frequent in the obstructive chronic pyelonephritis than in other urinary infections. This form of bacteriuria is frequently accompanied by exacerbations than in bacteriuria of periodic origin. Arterial blood hypertension is frequent in the elderly with urinary infections but its incidence does not correlate with the localization of the infection. Decompensated renal failure in the course of the urinary infections in the elderly is nearly always combined with arterial blood hypertension.