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Anales de Medicina Interna

versão impressa ISSN 0212-7199


FRANCO MORENO, A. I. et al. Study on bacteremia in the service of Internal Medicine of a group 2 hospital: Analysis of recent three years. An. Med. Interna (Madrid) [online]. 2005, vol.22, n.5, pp.217-221. ISSN 0212-7199.

Introduction: Bacteremia remains one of the most relevant problems in infectious disease. The interest of this study was to know the presentation and development pattern of bacteremia in our environment, in order to best prevent and treat this entity. Patients and method: A retrospective, no interventional study, on significant bacteremia detected in the Service of Internal Medicine of a secondary level hospital over three years was carried out. Through the study length, from January 1 2001 until December 31 2003, 4,719 blood cultures were processed by the Service of Microbiology; of these, 1964 (41.6%) were submitted by the Service of Internal Medicine. Results were positive in 336 (17.1%); of these, 18 (24.1%) correlated with episodes of true bacteremia, and 255 (75.9%) were deemed as contaminations. Results: Overall, 81 episodes of true bacteremia were studied, from 77 patients (4 patients presented with 2 episodes). An incidence rate of 28.25 episodes per 1000 hospital admissions was estimated. Mean age was 72 years (95% CI: 68.62-75.38). Males over 60 years-old were predominant (51.9%). Bacteremia was community-adquired in 75.3% of cases, and nosocomial in 24.7%. Commonest baseline diseases were elevated arterial blood pressure and diabetes mellitus. Bacteremia development was mostly related to genitourinary and vascular handling. Most of them were nephrourological (42.0%), respiratory (19.8%) and abdominal (13.6%) in origin. In our environment, Escherichia coli (33.0%) and Staphylococcus coagulase-negative (15.9%) were the most commonly isolated pathogens. Empiric antibiotic therapy was correct in 86.2% of cases; third generation cephalosporins were the most used. Overall mortality rate was 16% (13 patients), and bacteraemia-related mortality was 61%. Conclusions: A high incidence of bacteremia episodies is noteworthy, as compared with series from other centers. The percentaje of episodes due to Sthapylococcus coagulase-negative was significant, as it is the rule in recent years; thus, a thoroughly assessment of potential contaminants, as well as staff training in drawing techniques becomes necessary.

Palavras-chave : Bacteremia; Mortality; Nosocomial infection.

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