Daily Sepsis Research Analysis
Analyzed 7 papers and selected 3 impactful papers.
Summary
Analyzed 7 papers and selected 3 impactful articles.
Selected Articles
1. Neonatal Surgical Mortality in East Africa: A Systematic Review and Meta-Analysis.
Across 12 studies and 3,451 neonates, pooled mortality for surgical conditions in East Africa was 25.7% with substantial regional disparities. The review identifies sepsis prevention, thermoregulation, and referral strengthening as priority interventions to reduce mortality.
Impact: Provides the most comprehensive regional estimate of neonatal surgical mortality and highlights actionable levers—particularly sepsis prevention—to improve outcomes in LMICs.
Clinical Implications: Implement standardized sepsis-prevention bundles, strict thermoregulation, and rapid referral pathways in neonatal surgical care across East Africa; prioritize investments in perioperative capacity and registries.
Key Findings
- Pooled neonatal surgical mortality was 25.7% (95% CI 20.3–31.2%).
- Marked disparities across countries suggest system-level gaps in access and perioperative care.
- Priority interventions identified include sepsis prevention, thermoregulation, and strengthened referral systems.
Methodological Strengths
- PRISMA準拠の系統的レビューとランダム効果メタアナリシス
- Newcastle-Ottawa Scaleを用いたリスク・オブ・バイアス評価
Limitations
- Included studies are observational with potential heterogeneity and confounding.
- Incomplete reporting and possible publication bias may affect pooled estimates.
Future Directions: Establish standardized regional registries, harmonize definitions, and test context-adapted sepsis-prevention bundles in pragmatic trials.
INTRODUCTION: Neonatal surgical conditions contribute significantly to under-five mortality, particularly in low- and middle-income countries (LMICs). However, comprehensive data on neonatal surgical mortality (NSM) and its determinants in East Africa remain scarce. This systematic review and meta-analysis aimed to estimate the pooled mortality rate among neonates with surgical conditions and identify key predictors of mortality in the region. METHODS: Following PRISMA guidelines, we searched PubMed, Scopus, EMBASE, and Google Scholar from inception to 30 June 2025. Observational studies from East Africa reporting mortality in neonates (0-28 days) with surgical conditions, regardless of operation status, were included. Data were extracted using a standardized form, and risk of bias was assessed using the Newcastle-Ottawa Scale. Random-effects meta-analysis was performed to estimate pooled mortality rates. Predictors of mortality were synthesized narratively and via meta-regression where possible. RESULTS: Twelve studies (n=3,451 neonates) from five East African countries were included. The pooled overall mortality rate was 25.7% (95% CI: 20.3-31.2%; I CONCLUSION: Neonatal surgical mortality in East Africa is high, with nearly 1 in 4 neonates with surgical conditions dying. Disparities across countries may highlight systemic gaps in infrastructure, timely access, and perioperative care. Targeted interventions-such as sepsis prevention, thermoregulation protocols, and strengthened referral systems-are urgently needed to reduce mortality. Standardized regional registries and investment in neonatal surgical capacity are critical for equitable care.
2. Different Dosing Strategies of Total Parenteral Nutrition in Very Low Birth Weight Infants: A Network Meta-Analysis of Randomized Controlled Trials.
Across nine RCTs, a rapid-increase TPN strategy shortened time to regain birth weight and showed the lowest proportions of mortality, retinopathy, and sepsis, albeit with a higher PDA proportion. This dosing approach may offer the best balance of efficacy and safety for VLBW infants.
Impact: Synthesizes randomized evidence to inform a common NICU decision—how fast to advance TPN—linking dosing to both growth and infection outcomes including sepsis.
Clinical Implications: Consider a rapid-increase TPN protocol (standard start with quicker escalation) for VLBW infants, with vigilance for PDA risk and need for long-term neurodevelopmental follow-up.
Key Findings
- Rapid-increase TPN shortened time to regain birth weight vs. other strategies (MD −1.43 days; 95% CI −2.82 to −0.05; P-score 0.80).
- Safety profile favored rapid-increase with lowest proportions of mortality (0.043), retinopathy (0.124), and sepsis (0.141).
- Higher PDA proportion (0.508) observed with rapid-increase strategy.
Methodological Strengths
- PRISMA-NMAに準拠したネットワーク・メタアナリシス
- 直接比較と間接比較を統合する頻度主義モデルの適用
Limitations
- Only nine RCTs with potential heterogeneity in TPN protocols and outcome definitions.
- Limited data on long-term neurodevelopmental and metabolic outcomes.
Future Directions: Conduct adequately powered RCTs with standardized TPN protocols and long-term follow-up to assess neurodevelopment, metabolic health, and cardiopulmonary outcomes.
INTRODUCTION: Total parenteral nutrition (TPN) is essential for growth in very-low-birthweight (VLBW) infants. The worldwide variation in TPN dosing strategies warrants investigation. This study compared clinical outcomes of aggressive, rapid-increase, and standard TPN dosing strategies in VLBW infants. METHODS: A systematic review and network meta-analysis were conducted following the PRISMA NMA guideline. Searches were performed in PubMed, Scopus, Web of Science, CINAHL, CENTRAL, and ProQuest. Dosing strategies were classified as aggressive (higher starting dose), rapid-increase (standard start with rapid escalation), and standard (NICE-based). Outcomes were analyzed using a Frequentist model in RStudio v4.4.1. RESULTS: Nine randomized controlled trials were included. Compared with aggressive and standard strategies, the rapid-increase strategy was associated with a shorter time to regain birth weight (MD = -1.43 days; 95% CI -2.82 to -0.05; P-score = 0.80). The rapid-increase strategy was also associated with a shorter length of hospitalization (MD = -0.38 days; 95% CI -6.56 to 5.80; P-score = 0.54). Regarding safety outcomes, the rapid-increase strategy had the lowest proportions of mortality (Prop = 0.043), retinopathy (Prop = 0.124), and sepsis (Prop = 0.141), but a higher proportion of patent ductus arteriosus (PDA) (Prop = 0.508). DISCUSSION: The rapid-increase approach demonstrated the most favorable balance between efficacy and safety outcomes among the included trials, although the small number of studies is a limitation. CONCLUSION: Rapid-increase TPN, using the recommended starting dose but achieving maintenance more quickly, may offer clinical advantages for VLBW infants. Further long-term studies are needed to confirm developmental and metabolic impacts.
3. The Mediating Role of Immune Cells in the Genetically Predicted Relationship between Gut Microbiota and Puerperal Sepsis: A Mendelian Randomization Study.
Using large GWAS-based MR, 11 gut microbiota taxa showed causal effects on puerperal sepsis, with reverse causality excluded. Mediation MR indicated partial mediation via IgD−CD27− B cells (10.26%) and CD62L− monocytes (17.29%) for CAG-245 sp000435175.
Impact: Provides causal inference linking specific microbes to puerperal sepsis and identifies immune-cell pathways, informing biomarker discovery and mechanistic hypotheses.
Clinical Implications: While not yet practice-changing, results support developing microbial and immune-cell biomarkers for puerperal sepsis risk stratification and exploring microbiota-targeted prevention.
Key Findings
- Eleven gut microbiota taxa exhibited causal effects on puerperal sepsis in MR analyses.
- Reverse causality between puerperal sepsis and gut microbiota was ruled out.
- Two-step mediation MR showed partial mediation via IgD−CD27− B cells (10.26%) and CD62L− monocytes (17.29%) for CAG-245 sp000435175.
Methodological Strengths
- Large-scale GWAS instruments with sensitivity analyses to address pleiotropy and heterogeneity
- Two-step mediation Mendelian randomization to interrogate immune-cell mediation
Limitations
- Findings are based on summary-level genetic data without experimental validation.
- Potential residual pleiotropy and limited generalizability depending on GWAS ancestry and PS phenotyping.
Future Directions: Validate microbial and immune-cell mediators in prospective cohorts and mechanistic models; test microbiota-targeted prophylaxis in high-risk puerperal populations.
BACKGROUND: The causal relationship between gut microbiota and puerperal sepsis (PS) remains unclear, and there is a lack of in-depth research regarding the potential mediating role of immune cells in this context. OBJECTIVE: This study aims to investigate the causal relationship between gut microbiota and PS using Mendelian randomization (MR) analysis and to assess the mediating effects of immune cells on the risk of PS onset through mediation analysis. MATERIALS AND METHODS: We selected data from large-scale genome-wide association studies (GWAS) involving 473 gut microbiota species, 731 immune cell phenotypes, and PS datasets. Univariate MR (UVMR) analysis was employed to explore the causal relationship between gut microbiota and PS, with the primary statistical method being inverse variance weighting (IVW). Multiple statistical models were applied for sensitivity analysis to minimize the confounding effects of horizontal pleiotropy and heterogeneity. Subsequently, a two-step mediation MR analysis was conducted to evaluate whether immune cells mediate the relationship between gut microbiota and PS. RESULTS AND DISCUSSION: Analysis using various statistical models indicated that 11 gut microbiota species (e.g., Azorhizobiume, Bacillus velezensis, CAG-245 sp000435175, Lentimicrobiaceae, and Providencia) exhibited a causal relationship with PS. Further reverse causal analysis between PS and gut microbiota ruled out the possibility of reverse causality. The two-step mediation MR analysis demonstrated that the percentage of IgD-CD27- B cells (10.26%) and CD62L- monocytes (17.29%) partially mediated the effect of CAG-245 sp000435175 on PS risk. CONCLUSION: This study provides evidence of a causal relationship between the abundance of certain gut microbiota species and PS, while also revealing a potential mediating role of immune cells. These findings offer valuable theoretical insights into personalized treatment strategies and the development of novel diagnostic biomarkers for PS.