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Severe bloodstream infections: a population-based assessment
Kevin B Laupland1, Daniel B Gregson, David A Zygun
1Department of Critical Care Medicine, University of Calgary, Calgary Health Region, and Calgary Laboratory Services, Calgary, Alberta, Canada.
Critical Care Medicine
|April 9, 2004
Summary
Severe bloodstream infections requiring intensive care are common and deadly, affecting 15.7 per 100,000 people annually. Identifying risk factors like age and diabetes can help target prevention strategies for severe bloodstream infection.
Area of Science:
- Infectious Diseases
- Epidemiology
- Critical Care Medicine
Background:
- Bloodstream infections (BSI) frequently lead to critical illness, yet population-based data on severe BSIs are scarce.
- Severe BSI is defined as BSI requiring intensive care unit admission within 48 hours.
- Understanding the epidemiology of severe BSIs is crucial for public health.
Purpose of the Study:
- To determine the incidence and microbiology of severe bloodstream infections.
- To identify risk factors associated with acquiring severe BSIs.
- To assess predictors of mortality in patients with severe BSIs.
Main Methods:
- A population-based surveillance cohort study was conducted.
- Data were collected from adult patients with severe BSIs in the Calgary Health Region from 2000-2002.
- No specific interventions were applied; the study observed existing clinical data.
Main Results:
- The incidence of severe BSI was 15.7 per 100,000 person-years, with 342 episodes in 340 patients.
- Significant risk factors for acquisition included advanced age, male gender, urban residence, hemodialysis, diabetes, alcoholism, cancer, and lung disease.
- The case-fatality rate was 42%, with common pathogens being Staphylococcus aureus, Escherichia coli, and Streptococcus pneumoniae.
Conclusions:
- Severe bloodstream infections necessitate intensive care and are associated with substantial mortality.
- Identifying specific risk factors can guide targeted preventive measures for severe BSI.
- Further research into risk stratification and prevention is warranted.