Prevalência e perfil de suscetibilidade a antimicrobianos de microrganismos isolados em urocultura no período de janeiro a dezembro de 2007, em hospital municipal de Ibirité/MG

Abstract

This study was performed in the section of Microbiology of the Municipal Hospital Complex Alcina Campos Taitson (HMACT), Ibirité/MG, for evaluation of prevalence and definition of the susceptibility profile to antimicrobial agents of the microorgan-isms isolated from urine cultures at the ambulatorial service, the Urgency Attendance and Maternity; and for evaluation of the main parameters related to the population attacked by urinary tract infections (UTI). From January 01 to December 31, 2007, 5,863 urine cultures were performed. In 1,774 urine cultures (30%) there was growth of two or more microorganisms; in 148 (3%), growth of one microorganism, probable contaminant; in 726 (12%), there was growth of potentially infectious microorgan-isms; and in 3215 (55%), there was no growth. Women were more attacked by UTI (87.1% of the total of patients), for all the age groups, especially in the age group from 13 to 59 years. The more prevalent microorganisms in the 726 cases of positive urine culture were: Escherichia coli, 466 (63.5%) samples, followed by Streptococcus spp -hemolitic Group B, 57 (7.8%); Staphylococcus saprophyticus, 41 (5.6%); Kleb-siella pneumoniae, 31 (4.2%); Enterococcus spp, 25 (3.4%); Morganella morganii, 16 (2.2%); Proteus mirabilis, 12 (1.6%); Acinetobacter baumanii, 8 (1.1%); Citrobacter freundii, 8 (1.1%); Klebsiella oxytoca, 8 (1.1%); Staphylococcus aureus, 8 (1.1%); and Streptococcus spp -hemolitic probable Group B, 7 (1.0%). The highest resis-tance rates in TSA were obtained for ampicillin (for Escherichia coli, 51.8%; and Pro-teus mirabilis, 33.3%; for Citrobacter freundii, Klebsiella spp and Morganella morga-nii, 100.0%) and trimethoprim+sulfamethoxazole (Citrobacter freundii, 50%; Escheri-chia coli, 41.4%; Morganella morganii, 37.7%; Proteus mirabilis, 33.3%; and Klebsiel-la oxytoca, 25%). For Klebsiella pneumoniae, it was described the highest rate of in-termediate sensibility 22.6%, for nitrofurantoin. For Escherichia coli, the most pre-valent microorganism, the smallest resistance rates were obtained for nitrofurantoin (0.2%, men aged more then 60 years); norfloxacin (0.2%, girls from 0 to 4 years); trimethoprim+sulfamethoxazole (0.2%, boys from 5 to 12 years) and cefepime, cef-triaxone, cephotaxime, ciprofloxacin and gentamicin (0.2%, in women with age from 60 years). Considering susceptibilitys profile from more prevalent microrganism, the most of cases of UTI can be treated with cephalexin, nitrofurantoin or norfloxacino.