The 5-Hour Sepsis Test: No Cultures Required
Rapid culture-free test results are consistent with the gold standard for sepsis detection
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By
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Helen Bristow
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February 4, 2026
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Clinical Scorecard: The 5-Hour Sepsis Test: No Cultures Required
At a Glance
| Category | Detail |
|---|
| Condition | Sepsis |
| Key Mechanisms | Culture-free blood test using pan-pathogen PCR and nanopore sequencing to detect intact bacterial cells. |
| Target Population | ICU patients with suspected sepsis. |
| Care Setting | Intensive Care Unit (ICU) |
Key Highlights
- Culture-free assay detected 50% of tests positive compared to 12% for blood cultures.
- Sensitivity of the culture-free assay was close to 95% with a negative predictive value of 98%.
- Median turnaround time for results was just over 5 hours, significantly faster than conventional methods.
Guideline-Based Recommendations
Diagnosis
- Utilize culture-free assay for rapid identification of pathogens in suspected sepsis cases.
Management
- Integrate rapid test results with clinical context for timely therapeutic adjustments.
Monitoring & Follow-up
- Monitor for concordance between culture-free assay results and site-specific microbiological findings.
Risks
- Consider the potential for false positives or negatives, especially with fastidious organisms.
Patient & Prescribing Data
Patients in the ICU with suspected sepsis requiring rapid microbiological confirmation.
Early identification of pathogens can reduce unnecessary broad-spectrum antibiotic use.
Clinical Best Practices
- Read culture-free assay results within a clinical–microbiological framework.
- Correlate findings with site-of-infection microbiology and blood culture results.
References
