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Updated: May 5, 2026
Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
Published on: February 9, 2011
Evaluating the influence MRSA Co-infection on 28-day mortality among sepsis patients: insights from the MIMIC-IV
Yi-Chang Zhao1,2, Jia-Kai Li1,2, Yu-Kun Zhang1,3
1Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
Background:
Sepsis remains a leading cause of mortality in intensive care units (ICUs), with methicillin-resistant Staphylococcus aureus (MRSA) infections presenting significant treatment challenges. The impact of MRSA co-infection on sepsis outcomes necessitates further exploration.
Methods:
We conducted a retrospective observational cohort study using the Medical Information Mart for Critical Care IV (MIMIC-IV-2.2) database. This cohort study included sepsis patients, scrutinizing baseline characteristics, MRSA co-infection, antimicrobial susceptibility, and their relations to mortality through Cox regression and Kaplan-Meier analyses.
Results:
Among 453 sepsis patients analyzed, significant baseline characteristic differences were observed between survivors (N = 324) and non-survivors (N = 129). Notably, non-survivors were older (70.52 ± 14.95 vs. 64.42 ± 16.05, P < 0.001), had higher lactate levels (2.82 ± 1.76 vs. 2.04 ± 1.56 mmol/L, P < 0.001), and higher SOFA scores (8.36 ± 4.18 vs. 6.26 ± 3.65, P < 0.001). Cox regression highlighted SOFA score (HR = 1.122, P = 0.003), body temperature (HR = 0.825, P = 0.048), and age (HR = 1.030, P = 0.004) as significant predictors of 28-day mortality. MRSA co-infection was found in 98.7% of cases without a significant effect on 28-day mortality (P = 0.9). However, sensitivity to cephalosporins, meropenem, and piperacillin/tazobactam was associated with reduced mortality. The area under the ROC curve for the combined model of age, SOFA, and body temperature was 0.73, indicating a moderate predictive value for 28-day mortality.
Conclusion:
While MRSA co-infection's direct impact on 28-day sepsis mortality is minimal, antimicrobial sensitivity, especially to cephalosporins, meropenem, and piperacillin/tazobactam, plays a critical role in improving outcomes, underscoring the importance of antimicrobial stewardship and personalized treatment strategies in sepsis care.
Insights
Sepsis mortality is not significantly impacted by methicillin-resistant Staphylococcus aureus (MRSA) co-infection. However, antimicrobial sensitivity to key drugs improves sepsis patient outcomes, highlighting personalized treatment importance.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Epidemiology
Background:
- Sepsis is a major cause of ICU mortality.
- Methicillin-resistant Staphylococcus aureus (MRSA) infections complicate sepsis treatment.
- The influence of MRSA co-infection on sepsis outcomes requires further investigation.
Purpose of the Study:
- To analyze the impact of MRSA co-infection on sepsis patient mortality.
- To identify predictors of 28-day mortality in sepsis patients.
- To evaluate the role of antimicrobial susceptibility in sepsis outcomes.
Main Methods:
- Retrospective observational cohort study using the MIMIC-IV-2.2 database.
- Included 453 sepsis patients.
- Utilized Cox regression and Kaplan-Meier analyses to assess mortality predictors and outcomes.
Main Results:
- Non-survivors were older with higher lactate levels and SOFA scores.
- SOFA score, body temperature, and age predicted 28-day mortality.
- MRSA co-infection did not significantly affect 28-day mortality (P=0.9).
- Sensitivity to cephalosporins, meropenem, and piperacillin/tazobactam correlated with reduced mortality.
Conclusions:
- MRSA co-infection has a minimal direct effect on 28-day sepsis mortality.
- Antimicrobial sensitivity is crucial for improving sepsis patient outcomes.
- Emphasizes the need for antimicrobial stewardship and personalized treatment strategies in sepsis care.
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