[Incidence and clinical characteristics of symptomatic urinary infections in a geriatric hospital]

OBJECTIVES AND SETTINGS: The authors had for aim to study the incidence of symptomatic urinary infections (SUTI) in elderly patients, to describe their clinical and microbiologic characteristics and first-line treatment in a geriatric hospital with 902 beds: 124 in acute care (ACF), 293 in rehabilitation and intermediate-care (RICF), and 485 in long-term-care-facilities (LTCF).

During two months in 2003, all positive urine cultures detected by the laboratory were sent to the clinician with a questionnaire on clinical signs, diagnosis of SUTI and antibiotic treatment.

SUTI was diagnosed in 85 out of 204 positive urine cultures (40%). The incidence of SUTI was 1.86 per 1,000 patient-days (with rates of 2.63, 2.49, 1.41 per 1,000 patients-days for the ACF, RICF, LTCF respectively). For 51 cases (60%) there were only general symptoms, for 24 cases (28.2%) there were only urinary symptoms, and for 10 cases (11.8%) there were both. Escherichia coli and Proteus mirabilis were the main bacterial species involved in 57 and 14% respectively. E. coli strains were 59% resistant to amoxicillin, 55% resistant to amoxicillin-clavulanic acid, and 39% resistant to fluoroquinolones. The main antibiotics were fluoroquinolones, ceftriaxone, and amoxicillin-clavulanate, prescribed respectively in 52.5, 19, and 9% of the cases.

SUTI was diagnosed in only in 40% of positive urine cultures from elderly patients hospitalized in our hospital. To improve the management of SUTI in this population, we changed our recommendations for diagnosis and treatment.