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Development and Assessment of Intracellular Infection Models for Staphylococcus aureus
Published on: January 17, 2025
Predictors of Adverse Outcomes in Children With Staphylococcus aureus Bacteremia
Insights
High-risk infection sources combined with high vancomycin MICs predict treatment failure in pediatric Staphylococcus aureus bacteremia. Vancomycin MIC alone does not predict outcomes in children.
Area of Science:
- Pediatric Infectious Diseases
- Clinical Microbiology
- Treatment Outcomes Research
Background:
- Staphylococcus aureus bacteremia (SAB) is a frequent pediatric infection with substantial morbidity and mortality.
- Understanding factors predicting adverse outcomes in pediatric SAB is crucial for effective management.
Purpose of the Study:
- To identify risk factors for treatment failure in pediatric S. aureus bacteremia.
- To analyze clinical and microbiologic characteristics associated with adverse outcomes.
Main Methods:
- Retrospective analysis of 71 pediatric patients with S. aureus bacteremia from 2007-2012.
- Defined treatment failure as 30-day mortality, delayed microbiologic resolution, or recurrence.
Main Results:
- 17 out of 71 patients (24%) experienced treatment failure.
- High vancomycin minimum inhibitory concentration (MIC) combined with high-risk infection sources (e.g., grafts, intra-abdominal, respiratory) significantly predicted treatment failure.
- Vancomycin MIC alone was not a predictor of treatment failure.
Conclusions:
- High-risk infection sources are associated with increased treatment failure risk in pediatric S. aureus bacteremia.
- Vancomycin MIC alone is not a reliable predictor of treatment outcomes in this population.
Objectives:
Staphylococcus aureus bacteremia is a common infection, associated with significant morbidity and mortality in children. Factors associated with adverse treatment outcomes are poorly understood in the pediatric population.
Methods:
Our study compared clinical and microbiologic characteristics of children admitted during a 5-year period (2007-2012) to a large university-based hospital and found to have S aureus bacteremia with outcome measures, in order to identify risk factors associated with treatment failure (defined as 30-day mortality, delayed microbiologic resolution, or recurrence of S aureus bacteremia within 60 days of completing effective antibiotic therapy).
Results:
In all, 71 patients were found to have S aureus bacteremia, and of these, 17 patients (24%) experienced treatment failure. Based on the logistic regression model, only high vancomycin minimum inhibitory concentration in combination with a high-risk source of infection (i.e., infected graft or device, intra-abdominal infection, or respiratory tract infection) was significantly associated with risk of treatment failure.
Conclusions:
Infection associated with a high-risk source may increase the chance of treatment failure in pediatric patients with S aureus bacteremia. Vancomycin minimum inhibitory concentration alone was not found to be a predictor of treatment outcomes.
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