Antimicrobial susceptibility of bacteria from positive urine cultures SENSIBILIDAD A ANTIMICROBIANOS COMUNES DE BACTERIAS OBTENIDAS EN UROCULTIVOS POSITIVOS DE NINOS

Abstract

Antimicrobial susceptibility of 400 consecutive positive bacterial isolates from urine cultures (≥ 105 colony counts per ml) of a similar number of ambulatory (n: 216) and hospital (n: 184) male and female patients (300 girls) under age 15 year, from downtown Santiago, Chile, is described. All samples were processed at a university associated hospital of the chilean public health services system. Bacterial sensitivity was tested by disk diffusion (Kirby-Bauer). Escherichia coli was by far the most frequently isolated pathogenic bacteria (75.7% of the whole, 89.1% outpatient girls, 58.5% outpatient boys, 76.8% inpatient females and 45.7% inpatient males). Klebsiella pneumoniae was second in outpatients girls (3.4%), and Proteus mirabilis in boys (22.0%). Among inpatients Klebsiella pneumoniae, plus Klebsiella sp were second (13.4% in girls and 18.5% in males). Pseudomonas aeruginosa was only identified from inpatient males (10.1%). One third of E. coli comming from ambulatory patients w