Epidemiology and clinical features of maternal sepsis: A retrospective study of whole pregnancy period

Global incidence of maternal sepsis: A systematic review and meta-analysis

OBJECTIVE

This study investigates the global incidence of maternal sepsis, a life-threatening condition and major cause of maternal mortality. Through a systematic review and meta-analysis, we aim to provide a more precise estimation of its incidence, identify regional variations, and examine associated risk factors to inform improved prevention and management strategies.

METHODS

This systematic review and meta-analysis was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A comprehensive search of PubMed/MEDLINE, Scopus, Google Scholar, EMBASE, and the Web of Science was performed for studies published from inception to January 10, 2025. The methodological quality of the included studies was rigorously assessed using the Joanna Briggs Institute (JBI) critical appraisal tools. The pooled incidence rate per 10,000 pregnancies was estimated using a random-effects meta-analysis model to account for study heterogeneity. Furthermore, the analysis also explored the risk factors that contribute to the development of maternal sepsis.

RESULTS

A total of 44 studies, encompassing 141,200,302 pregnant women from 24 countries, were included in the analysis. The global cumulative incidence of maternal sepsis was found to be 13.16 per 10,000 pregnant women (95 % CI: 9.91-17.47). Regional variations were significant, with the highest crude incidence observed in the African region (129.17 per 10,000; 95 % CI: 67.05-248.85), while the lowest was recorded in the Region of the Americas (6.31 per 10,000; 95 % CI: 4.36-9.12). These findings were based on six studies from the African region and 17 from the Americas. Additionally, the study identified several factors, such as age ≥ 35, multiple pregnancies, gestational diabetes, preeclampsia/eclampsia, hypertension, diabetes mellitus, obesity, and cesarean delivery, that were linked to an increased risk of maternal sepsis.

CONCLUSION

This study provides global and regional estimates of maternal sepsis, with a cumulative incidence of 13.16 per 10,000 pregnancies, highlighting regional disparities. Key risk factors include multiple pregnancies, preeclampsia, hypertension, obesity, and cesarean delivery. The findings emphasize the need for improved healthcare access, better data collection, and early intervention to reduce maternal sepsis worldwide.

Maternal Sepsis and associated factors: A multi-central study from two tertiary care hospitals of South Punjab, Pakistan

Objective

To determine the risk factors and outcomes of maternal sepsis.

Methods

This case-control study was performed at the departments of Obstetrics & Gynecology, Nishtar Hospital, Multan, and Ghazi Khan Hospital, Dera Ghazi Khan, Pakistan, from June 2023 to May 2024. Cases were comprised of females aged 18-45 years diagnosed with maternal sepsis, and admitted during the study period. Controls were randomly selected females reporting during the study period and undergoing delivery. Sepsis was labeled on the basis of positive blood culture report. Crude and adjusted odds ratio with 95% confidence interval were reported regarding various risk factors of maternal sepsis as well as maternal and fetal outcomes taking p<0.05 as significant. Mortality was noted from the onset of labor until seven days postpartum.

Results

In a total of 74 women (37 in each group), the mean age and, gestational age were 30.64±5.12 years, and 36.19±1.84 weeks, respectively. Multivariate binary logistic regression showed that gestational age below 37 weeks (AOR: 5.22; 95% CI: 1.35-19.67; p=0.015), unbooked cases (AOR: 5.34; 95% CI: 1.19-24.2; p=0.029), and anemia (AOR: 8.13; 95% CI: 1.05-63.10; p=0.045) were significant predictors of maternal sepsis. E. coli was the most common etiological agent among cases, affecting 14 (37.8%) cases. Mortality was significantly high among females with maternal sepsis versus those without maternal sepsis (32.4% vs. 2.7%, p=0.008).

Conclusion

Gestational age below 37 weeks, lack of antenatal booking, and anemia were found to be significant predictors of maternal sepsis. E. coli was the most common pathogen identified. High mortality rate in maternal sepsis highlights the need for early identification, effective management, and close monitoring to reduce maternal mortality from sepsis.

Maternal Sepsis: The Diagnostic Challenge in a Comorbid Patient in Mexico

Maternal sepsis is a complication that can be difficult to diagnose in the early stages because symptoms can be vague or attributed to other conditions. We present the case of a 38-year-old woman, in her third pregnancy with a diagnosis of uncontrolled gestational diabetes, who developed urinary origin sepsis in the second trimester of pregnancy. The patient was initially admitted with a clinical presentation interpreted as a urinary tract infection. However, her condition quickly deteriorated with sudden dyspnea, hypotension, and tachycardia. She was approached as a probable aortic dissection and transferred to a tertiary care facility for definitive treatment. Upon arrival at the reference center, the diagnosis of urinary focus sepsis was established, with imaging studies showing right pyelocaliceal dilatation and inflammatory process. The appropriate antibiotic treatment was delayed due to the lack of an early diagnosis, leading to clinical deterioration that necessitated urgent surgery. The therapeutic approach included broad-spectrum antibiotics and the placement of a right JJ catheter with drainage of purulent material, followed by intensive management. This case highlights the diagnostic challenge posed by maternal sepsis and underscores the critical role of early recognition through scoring systems, emphasizing the need for increased clinical suspicion and immediate attention.

Uterotonics, magnesium sulphate and antibiotics during childbirth and peripartum: Important obstetric drugs for the anaesthesiologist

The main causes of maternal mortality are comorbidities, hypertensive pregnancy syndrome, obstetric haemorrhage, and maternal sepsis. For this reason, uterotonics, magnesium sulphate, and antibiotics are essential tools in the management of obstetric patients during labour and in the peripartum period. These drugs are widely used by anaesthesiologists in all departments, and play a crucial role in treatment and patient safety. For the purpose of this narrative review, we performed a detailed search of medical databases and selected studies describing the use of these drugs in patients during pregnancy, delivery and the pospartum period. Uterotonics, above all oxytocin, play an important role in the prevention and treatment of pospartum haemorrhage, and various studies have shown that in obstetric procedures, such as scheduled and emergency caesarean section, they are effective at lower doses than those hitherto accepted. We also discuss the use of carbetocin as an effective alternative that has a therapeutic advantage in certain clinical circumstances. Magnesium sulphate is the gold standard in the prevention and treatment of eclampsia, and also plays a neuroprotective role in preterm infants. We describe the precautions to be taken during magnesium administration. Finally, we discuss the importance of understanding microbiology and the pharmacology of antibiotics in the management of obstetric infection and endometritis, and draw attention to the latest trends in antibiotic regimens in labour and caesarean section.

Evaluation of microbiological epidemiology and clinical characteristics of maternal bloodstream infection: a 10 years retrospective study

Objective

Although the incidence of bloodstream infection (BSI) during pregnancy is relatively low, it can lead to unfavorable outcomes. The aim of our study was to analyze the clinical and microbiological characteristics of maternal bacteremia and to assess maternal and fetal outcomes.

Methods

Our study was a retrospective study conducted in a tertiary women and children's hospital in Guangzhou, China, from 2013 to 2022. Data were extracted from medical records and the laboratory information system. The participants were divided into groups, and the difference between the groups was analyzed.

Results

The incidence of maternal BSI during the 10 years study period was 10.2 cases/10,000 maternities, with a peak found from 2014 to 2016. Escherichia coli (48%) was the predominant causative pathogen, followed by Streptococcus agalactiae (13%). Gestational diabetes mellitus (GDM) (15%) was the most common underlying condition among maternal BSI episodes. Urinary tract (13%) and genital tract (28%) were the predominant source of BSI. About 14% of neonates were infected, and BSI was the most common type of infection. E. coli was the predominant pathogen in mother-neonate pairs with concurrent BSI. Premature rupture of membranes (PROM, OR:4.68) and preterm birth (OR:3.98) were the risk factors predicting neonatal infection. More than 85% of the E. coli were resistant to ampicillin (AMP) and 50% of the E. coli were extended-spectrum β-lactamase (ESBL)-producing bacteria.

Conclusion

Maternal BSI is a rare event, but continuous monitoring on the aspects of pathogen composition, antimicrobial resistance characteristics, and risk factors for adverse outcomes remains necessary to further reduce poor outcomes and mitigate bacterial resistance.

Factors Associated with Increased Risk of Urosepsis during Pregnancy and Treatment Outcomes, in a Urology Clinic

Background and Objectives: Urosepsis is a significant cause of maternal and fetal mortality. While certain risk factors for urinary tract infections (UTIs) in pregnant women are well established, those associated with an elevated risk of urosepsis in pregnant women with upper UTIs remain less defined. This study aims to identify factors linked to an increased risk of urosepsis and examine urologic treatment outcomes in such cases. Materials and Methods: We conducted a retrospective analysis on 66 pregnant women diagnosed with urosepsis over a nine-year period. A control group included 164 pregnant women with upper UTIs, excluding urosepsis, admitted during the same timeframe. This study highlights factors potentially contributing to urosepsis risk, including comorbidities like anemia, pregnancy-related hydronephrosis or secondary to reno-ureteral lithiasis, prior UTIs, coexisting urological conditions, and urologic procedures. Outcomes of urologic treatments, hospitalization duration, obstetric transfers due to fetal distress, and complications associated with double-J catheters were analyzed. Results: Pregnant women with urosepsis exhibited a higher prevalence of anemia (69.7% vs. 50.0%, p = 0.006), 2nd-3rd grade hydronephrosis (81.8% vs. 52.8%, p = 0.001), and fever over 38 °C (89.4% vs. 42.1%, p = 0.001). They also had a more intense inflammatory syndrome (leukocyte count 18,191 ± 6414 vs. 14,350 ± 3860/mmc, p = 0.001, and C-reactive protein (CRP) 142.70 ± 83.50 vs. 72.76 ± 66.37 mg/dL, p = 0.001) and higher creatinine levels (0.77 ± 0.81 vs. 0.59 ± 0.22, p = 0.017). On multivariate analysis, factors associated with increased risk for urosepsis were anemia (Odds Ratio (OR) 2.622, 95% CI 1.220-5.634), 2nd-3rd grade hydronephrosis (OR 6.581, 95% CI 2.802-15.460), and fever over 38 °C (OR 11.612, 95% CI 4.804-28.07). Regarding outcomes, the urosepsis group had a higher rate of urological maneuvers (87.9% vs. 36%, p = 0.001), a higher rate of obstetric transfers due to fetal distress (22.7% vs. 1.2%, p = 0.001), and migration of double-J catheters (6.1% vs. 0.6%, p = 0.016), but no maternal fatality was encountered. However, they experienced the same rate of total complications related to double-J catheters (19.69% vs. 12.80%, p > 0.05). The pregnant women in both groups had the infection more frequently on the right kidney, were in the second trimester and were nulliparous. Conclusions: Pregnant women at increased risk for urosepsis include those with anemia, hydronephrosis due to gestational, or reno-ureteral lithiasis, and fever over 38 °C. While the prognosis for pregnant women with urosepsis is generally favorable, urological intervention may not prevent a higher incidence of fetal distress and the need for obstetric transfers compared to pregnant women with uncomplicated upper UTIs.

Neutrophil CD64 index as a good biomarker for early diagnosis of bacterial infection in pregnant women during the flu season

Background

Pregnant women are at high risk of developing febrile illness during the flu season. Early identification of a viral or bacterial infection is crucial in the management of febrile pregnant patients. Neutrophil CD64 (nCD64) has been shown to have more important diagnostic value in sepsis than traditional inflammatory indicators.

Methods

The pregnant women enrolled were divided into three groups according to disease: influenza A infection, bacterial infection and healthy controls. Peripheral blood CD64, leukocyte, C-reactive protein (CRP), procalcitonin (PCT) and human Th1/Th2-related cytokines levels were routinely measured. The correlation between and diagnostic value of the nCD64 index and other biomarkers were evaluated using Spearman's correlation test and receiver operating characteristic (ROC) curve analysis.

Results

Pregnant women with bacterial infection had significantly elevated levels of leukocytes (8.4 vs. 5.95, 109/L; P = 0.004), CRP (89.70 vs. 50.05 mg/mL; P = 0.031), PCT (0.13 vs. 0.04 ng/mL; P = 0.010) and TNF-α (0.46 vs. 0.38 pg/mL; P = 0.012) and an elevated nCD64 index (12.16 vs. 0.81; P < 0.001) compared with those with influenza A infection. The area under the receiver operating characteristic (AUROC) curve of the nCD64 index to discriminate bacterial infection among pregnant women (AUROC = 0.9183, P < 0.0001) was the largest. The sensitivity and specificity of the nCD64 index at an optimal cut-off value of 3.16 were 84% and 100%, respectively, with a negative predictive value (NPV) of 94%.

Conclusions

Our study demonstrates the clinical value of the nCD64 index in distinguishing between bacterial infection and influenza A in pregnant women.