Mortality and Morbidity Rates in Urosepsis: Insights from the SERPENS Study

Overview

This prospective multi-center study of 354 urosepsis patients across 34 European hospitals assessed 30-day mortality and morbidity, identifying key risk factors influencing outcomes. Severe sepsis and septic shock were present in nearly half the cohort, with Gram-negative bacteria predominating as causative pathogens. Organ failure and death were analyzed using SOFA scores and clinical variables to better understand prognostic indicators.

Background

Urosepsis, a severe complication of urinary tract infections, contributes significantly to sepsis cases worldwide. Despite relatively low mortality compared to other sepsis types, it remains a critical area for research due to its potential for organ failure and long-term morbidity. Risk factors such as indwelling catheters, obstructive uropathy, and antimicrobial resistance complicate management. The study aimed to characterize mortality and morbidity within 30 days of diagnosis using Sepsis-2 criteria and microbiological confirmation.

Data Highlights

Key Findings

• Nearly half of patients (48.9%) presented with severe sepsis or septic shock at diagnosis.
• Gram-negative bacteria were the predominant pathogens, identified in 82% of urine cultures.
• Organ failure was assessed using SOFA scores, with failure defined as a score >1 or increase by 1 point from baseline.
• Mortality and morbidity outcomes were categorized into death, multiple organ failure, single organ failure, and recovery within 30 days.
• Ordinal logistic regression identified multiple patient and clinical factors influencing risk of organ failure and death.
• Antimicrobial resistance and multi-drug resistant pathogens complicated treatment and prognosis.

Clinical Implications

Early identification of severe sepsis and septic shock in urosepsis patients is critical for timely intervention. Monitoring organ function via SOFA scores can guide clinical decision-making and predict outcomes. Awareness of predominant Gram-negative pathogens and antimicrobial resistance patterns is essential for optimizing antibiotic therapy. A risk-based approach rather than sole reliance on SIRS criteria improves diagnostic specificity and patient management.

Conclusion

The SERPENS study provides valuable insights into mortality and morbidity risk factors in urosepsis, highlighting the importance of severity assessment, pathogen identification, and organ failure monitoring. These findings support enhanced prognostic tools and tailored treatment strategies to improve patient outcomes.

References

1. SERPENS Study Group 2024 -- Mortality and Morbidity Rates in Urosepsis