Daily Sepsis Research Analysis
Analyzed 34 papers and selected 3 impactful papers.
Summary
Three impactful advances span sepsis diagnostics, systems capacity, and device-related infection prevention. A prospective ED study shows Monocyte Distribution Width (MDW) markedly outperforms procalcitonin and CRP for early bloodstream infection detection. A pan-European survey reveals major gaps in blood culture logistics and rapid testing, while an international Delphi consensus standardizes prevention, diagnosis, and treatment of ECMO cannula-site infections.
Research Themes
- Early sepsis diagnostics and risk stratification in the ED
- Laboratory systems performance for blood cultures and rapid testing
- Consensus guidance for ECMO cannula-site infection prevention and management
Selected Articles
1. Changing in blood cells for infection detection: "Monocyte distribution width" acts as a key determinant in differentiating localized and blood stream infections.
In a prospective ED cohort of 608 adults, MDW achieved an AUC of 0.936 for detecting bloodstream infection, significantly outperforming procalcitonin and CRP. MDW also distinguished localized infection from no infection and was uniquely associated with in-hospital mortality.
Impact: This study provides strong prospective evidence that MDW can substantially improve early identification of bloodstream infection and mortality risk stratification in ED settings.
Clinical Implications: Incorporating MDW into ED triage and sepsis workups could accelerate targeted diagnostics, prioritize empiric therapy for probable BSI, and enhance prognostic assessment.
Key Findings
- MDW had AUC 0.936 for BSI detection, significantly higher than PCT (0.818) and CRP (0.829) with p < 0.0001.
- MDW discriminated localized infection from no infection (AUC 0.748).
- MDW was significantly elevated in non-survivors versus survivors (p = 0.001), indicating prognostic value.
Methodological Strengths
- Prospective observational design with real-time ED enrollment and adjudication into clinically relevant groups.
- Direct biomarker comparisons using ROC analysis with statistical significance testing.
Limitations
- Single-cohort design without external validation limits generalizability.
- Retrospective adjudication of infection categories may introduce classification bias.
Future Directions: External multicenter validation, assessment of MDW-guided care pathways on time-to-antibiotics and outcomes, and integration with rapid microbiology to optimize ED sepsis algorithms.
BACKGROUND: Early identification of bloodstream infections (BSI) in the Emergency Department (ED) remains a clinical challenge. Monocyte Distribution Width (MDW), a novel biomarker available from the complete blood count, was prospectively evaluated for its diagnostic and prognostic utility in patients with suspected infection. METHODS: We conducted a prospective, observational cohort study enrolling 608 adult ED patients. Following a comprehensive diagnostic workup, patients were retrospectively adjudicated into three primary groups: No Infection (n = 196), Localized Infection (n = 235), and Bloodstream Infection (BSI) (n = 134). The diagnostic accuracy of MDW was compared to procalcitonin (PCT) and C-reactive protein (CRP) using receiver operating characteristic (ROC) analysis. RESULTS: In this cohort, MDW demonstrated high accuracy for BSI detection (Area Under the Curve [AUC] = 0.936), representing a statistically significant improvement over both PCT (AUC = 0.818; p < 0.0001) and CRP (AUC = 0.829; p < 0.0001). It also showed good accuracy in discriminating localized infections from the no-infection group (AUC = 0.748). Notably, among the biomarkers tested, MDW was the only biomarker significantly elevated in non-survivors compared to survivors (p = 0.001), indicating a unique prognostic value for in-hospital mortality. CONCLUSIONS: In ED patients with suspected infection, MDW is a highly effective biomarker for the early detetion of BSI, demonstrating significantly higher diagnostic accuracy than PCT and CRP in this study. Its ability to help stratify patients with localized versus systemic infection and to predict mortality makes it a valuable tool for early risk assessment and clinical decision-making.
2. Blood culture practices and microbiological capacity for sepsis diagnostics in Europe (2021-2022): a cross-sectional analysis of the European Sepsis Care Survey.
Across 907 European hospitals, many blood culture recommendations were not followed, and only 10% had 24/7 microbiology while 43.7% had rapid identification capability. Hospitals with both 24/7 service and rapid testing (7.4%) had markedly higher odds of delivering final results within two days.
Impact: This large systems-level analysis identifies actionable gaps in blood culture practices and laboratory capacity that directly influence time-to-result and potentially patient outcomes.
Clinical Implications: Investing in 24/7 microbiology services and rapid identification platforms, standardizing multi-site sampling and adequate set numbers, and reducing transport delays can shorten time-to-effective therapy in sepsis.
Key Findings
- Blood culture guidelines existed in 84.4% of hospitals, yet recommended practices were often not followed.
- Only 10.0% had around-the-clock microbiology; 43.7% had rapid pathogen identification; just 7.4% had both.
- Hospitals with 24/7 service plus rapid testing had higher odds of final results within two days (OR 4.59, 95% CI 2.50–7.79; p < 0.0001).
Methodological Strengths
- Large, multi-country sample of 907 hospitals with standardized questionnaire.
- Analysis linked laboratory infrastructure to time-to-result with quantified effect sizes.
Limitations
- Self-reported survey data may introduce reporting and selection biases.
- Lacks patient-level clinical outcomes to directly link delays with mortality or morbidity.
Future Directions: Implementation studies to evaluate the impact of 24/7 services and rapid platforms on antibiotic timing and outcomes; benchmarking and incentives to improve adherence to collection recommendations.
BACKGROUND: Blood cultures (BCs) are key diagnostic elements for sepsis patients. Accurate preanalytical procedures are substantial, and results should be available as soon as possible to guide adequate antimicrobial treatment. This study aimed to evaluate BC collection practices and diagnostic capacity across European hospitals. METHODS: This cross-sectional survey investigated BC diagnostics in acute care hospitals across 37 European countries in the years 2021 and 2022. Analyses included BC guidelines, collection sites, number of BC sets in emergency departments (EDs), wards, and intensive care units (ICUs). We also examined transfer after collection, the use of on-site vs. external laboratories, opening hours, rapid testing capacity, and turn-around times of BCs processed in microbiology laboratories with different infrastructures. FINDINGS: Responses were collected from 907 hospitals in Europe. BC guidelines were available in 84·4% (741/878) of the hospitals. BCs were preferably collected by multiple-site sampling in EDs (62·7%, 461/735), in wards (64·0%, 513/802) and ICUs (68·5%, 518/756). One BC set was preferred in EDs in 38·4% (270/704), in wards in 40·5% (314/775), and ICUs in 34·9% (261/748). Two BC sets were preferred in EDs in 31·0% (218/704), in wards in 28·1% (218/775), and ICUs in 39·2% (293/748). 48·0% (402/838) of hospitals used on-site and 52·0% (436/838) external microbiology laboratories. Around-the-clock microbiological services were available in 10⋅0% (91/907), and rapid pathogen identification in 43·7% (396/907) of hospitals. Infrastructure with around-the-clock microbiological service and rapid testing was available in 7·4% (62/840) of hospitals, and probability of a final microbiological result within two days was highest in these hospitals compared to hospitals with limited microbiology service (for BC collected on wards: 19·6% vs. 52·7%, Odds Ratio 4·59 [95% CI 2·50-7·79], p < 0·0001). INTERPRETATION: Despite the availability of BC guidelines in many hospitals, current recommendations for BC collection were often neglected. Rapid testing capacity was limited in most microbiological laboratories, and around-the-clock service for BCs was very rare. As delay in results may have a detrimental impact on patient outcomes, strategies to improve these processes are urgently needed. FUNDING: The European Sepsis Alliance and a grant by Becton and Dickinson.
3. A consensus of international experts on definition, sampling, treatment, and prevention of peripheral extracorporeal membrane oxygenation cannula-site infection obtained by the Delphi method: the SAVECMO study.
An international Delphi panel (n=39) reached consensus on defining, suspecting, diagnosing, preventing, and treating peripheral ECMO cannula-site infections, recommending standardized sampling and chlorhexidine-impregnated or semipermeable dressings while discouraging routine antibiotic prophylaxis.
Impact: This consensus fills a critical guidance gap for a high-risk ICU population, standardizing ECMO-CSI management to improve outcomes and harmonize research.
Clinical Implications: Adopting agreed definitions, suspicion criteria, and sampling methods can reduce diagnostic variability; using chlorhexidine-impregnated or semipermeable dressings and avoiding routine prophylactic antibiotics may lower infections and antimicrobial overuse.
Key Findings
- Consensus (≥70% agreement) established standardized definition of ECMO-CSI requiring pathogen isolation from local sampling plus purulent discharge or local inflammatory signs.
- Recommended sampling includes swabs and purulent drainage aspiration; some methods were rejected.
- Preventive measures endorsed chlorhexidine-impregnated or semipermeable polyurethane dressings unchanged for 7 days unless soiled/bleeding; routine antibiotic prophylaxis was not recommended.
Methodological Strengths
- Rigorous multi-round Delphi process with predefined ≥70% consensus threshold.
- International, multidisciplinary expert panel focused on peripheral ECMO-CSI.
Limitations
- Consensus-based guidance without direct patient-level outcome data.
- Applicability to central ECMO excluded; implementation effects remain untested.
Future Directions: Prospective implementation studies to measure infection rates and antimicrobial use under the consensus protocol; evaluation of dressing types and change intervals in randomized trials.
BACKGROUND: Nosocomial infections are common in patients receiving extracorporeal membrane oxygenation (ECMO), with ECMO cannula-site infections (ECMO-CSI) being the most frequent infections directly related to the ECMO run. These infections can significantly impact patient outcomes. Currently, no adult guidelines exist for the prevention, diagnosis, and/or treatment of peripheral ECMO-CSI, resulting in heterogeneity in both clinical practice and research findings. METHODS: We conducted a Delphi study involving 39 international experts in ECMO management. The experts participated in four Delphi rounds to reach consensus on various aspects of ECMO-CSI complicating peripheral ECMO (central ECMO excluded), including definition, clinical suspicion, diagnostic methods, preventive measures, and treatment. Consensus was defined as ≥ 70% agreement among experts on each proposed item. RESULTS: The Delphi process established consensus on key aspects of ECMO-CSI. Experts agreed on clinical scenarios that warrant suspicion of ECMO-CSI, such as purulent discharge and local inflammatory signs. Standardized sampling techniques, including swabs and purulent drainage aspiration, were recommended, while others were rejected. Definitions were clarified, specifying that ECMO-CSI is defined by the isolation of a pathogen through local microbiological sampling and the presence of purulent discharge or local inflammatory signs. Among the preventive measures, the use of chlorhexidine-impregnated or semipermeable polyurethane dressings, unchanged for 7 days unless soiled or bleeding, was recommended, whereas systematic antibiotic prophylaxis, even for surgical ECMO, was not recommended. CONCLUSION: This study presents an international expert consensus focusing on peripheral ECMO-CSI, providing a standardized framework to improve clinical management and facilitate future research. The consensus aims to enhance patient outcomes and support evidence-based guidelines in this complex field.