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Isolation and Flow Cytometric Assessment of Neuroimmune Interactions in a Mini-Stroke Murine Model
Published on: June 20, 2025
Early blood-based microbiological testing is ineffective in severe stroke patients
Christoph Gumbinger1, Andreas Hug, Bettina Mürle
1Department of Neurology, University Hospital of Heidelberg, Germany.
Journal of the Neurological Sciences
|January 1, 2013
Summary
Severe stroke patients often show infection signs but rarely have early bacteremia. Routine blood cultures and PCR tests for bacteria are unlikely to be beneficial in this patient group.
Area of Science:
- Neurology
- Infectious Diseases
- Critical Care Medicine
Background:
- Severe acute stroke patients face high risks of systemic infections, increasing morbidity and mortality.
- Current guidelines do not recommend prophylactic antibiotic therapy for stroke patients.
- Early and sensitive pathogen detection in blood is crucial for guiding antibiotic therapy.
Purpose of the Study:
- To investigate the diagnostic yield of blood culture testing and microbiological PCR-based methods for detecting early bacteremia in severe acute stroke patients.
- To assess the utility of routine microbiological assays in identifying pathogens in this high-risk population.
Main Methods:
- Serial blood cultures were performed every 12 hours for up to 96 hours in 21 severe acute stroke patients.
- Microbiological PCR-based techniques were employed once before antibiotic treatment during the first fever episode.
- Patients were characterized by high NIH Stroke Scale scores and frequent intubation post-ICU admission.
Main Results:
- All 21 enrolled patients exhibited signs and laboratory findings consistent with systemic infections within 36 hours of admission.
- Despite signs of infection, no pathogenic bacteria were detected in any patient via serial blood cultures or PCR-based methods.
- This indicates a lack of early bacteremia in this severe stroke cohort.
Conclusions:
- Early bacteremia is not a typical feature in severe acute stroke patients, even with signs of immune depression and subsequent infections like pneumonia.
- Routine early blood-based microbiological assays, including standard and molecular methods, do not appear to detect bacteremia in this context.
- The findings question the routine use and clinical utility of early blood microbiological testing in severe acute stroke patients.
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