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Overview of septicemia
1Istituto di Clinica Medica VI, Università La Sapienza, Roma, Italy.
Abstract:
Despite progress in antimicrobial therapy, septicemia remains a major problem of modern medicine. The clinical features and outcome may vary in different clinical settings and in a single setting during the years. As an example, gram-negative bacilli have been the prevalent cause of fulminant septicemia in granulocytopenic patients during the seventies. Nowdays, the use of indwelling central venous catheters and/or quinolone prophylaxis have favored the emergence of coagulase-negative staphylococci as a major cause of septicemia in these patients. As a consequence, the optimal management of febrile episodes in granulocytopenic patients should include not only a combination of a broad spectrum betalactam plus an aminoglycoside to prevent early death from gram-negative septicemia, but also antistaphylococcal antibiotics in cases not improving after 72 hours. The clinical spectrum of infective endocarditis continues to evolve. Infection of the right heart valves that was rare until a few decades ago, is now a frequent cause of staphylococcal septicemia in intravenous drug addicts. Along with prosthetic valve infection, new clinical syndromes of nosocomial endocarditis are emerging. Infections of permanent central venous catheters, ventriculoatrial shunts or pace-maker leads may in fact cause right-sided infective endocarditis. Septicemia will continue to challenge physicians in the future.
Insights
Septicemia remains a significant medical challenge, with evolving causes like staphylococci in immunocompromised patients. Optimal management requires tailored antimicrobial strategies based on pathogen shifts and clinical context.
Area of Science:
- Infectious Diseases
- Internal Medicine
- Clinical Microbiology
Background:
- Septicemia continues to pose a significant threat in modern medicine, with clinical presentations and outcomes varying over time and across settings.
- Historically, gram-negative bacilli were primary culprits in fulminant septicemia among granulocytopenic patients.
- Contemporary factors such as indwelling central venous catheters and quinolone prophylaxis have shifted the causative agents towards coagulase-negative staphylococci in these patients.
Purpose of the Study:
- To highlight the evolving landscape of septicemia pathogens and their clinical implications.
- To underscore the need for adaptive management strategies in febrile episodes, particularly in granulocytopenic patients.
- To discuss emerging clinical syndromes of infective endocarditis, including those associated with medical devices.
Main Methods:
- Review of clinical observations and treatment outcomes in septicemia and infective endocarditis.
- Analysis of shifts in prevalent pathogens causing septicemia in specific patient populations (e.g., granulocytopenic patients, intravenous drug users).
- Examination of the role of medical devices and prophylactic treatments in the epidemiology of septicemia.
Main Results:
- Coagulase-negative staphylococci have emerged as a major cause of septicemia in granulocytopenic patients, supplanting gram-negative bacilli in some contexts.
- Right-sided infective endocarditis is increasingly associated with intravenous drug use and infections of indwelling devices.
- Optimal management for febrile granulocytopenic patients necessitates broad-spectrum antibiotics initially, with consideration for antistaphylococcal agents if no improvement occurs within 72 hours.
Conclusions:
- The management of septicemia requires continuous adaptation to changing etiological patterns.
- Antistaphylococcal coverage should be incorporated into treatment protocols for febrile granulocytopenic patients not responding to initial broad-spectrum therapy.
- Physicians must remain vigilant for novel presentations of infective endocarditis, particularly those linked to healthcare-associated infections and device use.