Polymicrobial Bloodstream Infection Dynamics
Summary
Polymicrobial bloodstream infections constitute a complex interplay of multiple pathogens invading the circulatory system, often originating from diverse sources such as intravascular devices, surgical sites and mucosal barriers. These mixed infections can involve bacteria, fungi or both, leading to synergistic or antagonistic interactions that influence disease severity and response to therapy. Compared with monomicrobial cases, polymicrobial infections pose greater diagnostic challenges due to overlapping clinical signs and the need for broad culture and molecular assays. Epidemiological data reveal rising incidence in critically ill and neonatal populations, driven by invasive procedures, prolonged hospitalisation and the spread of antimicrobial resistance. Management relies on rapid identification of all causative organisms, tailored combination antimicrobial regimens and effective source control. Advances in rapid diagnostics and microbial ecology are paving the way for precision treatment strategies, with the aim of reducing morbidity, mortality and healthcare burden worldwide.
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Polymicrobial Bloodstream Infection Dynamics publication trend
The graph below shows the total number of articles in polymicrobial bloodstream infection dynamics across all publications each year (not limited to Nature Index journals).
Technical terms
Polymicrobial bloodstream infection: Concurrent invasion of the bloodstream by two or more microbial species.
Monomicrobial bloodstream infection: Bloodstream infection caused by a single microbial species.
Empirical antimicrobial therapy: Initial antibiotic treatment based on clinical judgement prior to identification of the causative pathogen.
Source control: Clinical measures to remove or drain the origin of infection, such as device removal or surgical debridement.
Multidrug resistance: The ability of a microorganism to withstand treatment with multiple classes of antimicrobial agents.
References
- Polymicrobial methicillin-resistant Staphylococcus aureus bloodstream infections. Microbiology Spectrum (2024).
- Polymicrobial bloodstream infections per se do not increase mortality compared to monomicrobial bloodstream infections in sepsis patients: a Korean nationwide sepsis cohort study. BMC Infectious Diseases (2024).
- Polymicrobial bloodstream infections a risk factor for mortality in neonates at the national hospital, Tanzania: A case-control study. PLOS ONE (2024).
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