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Updated: Aug 11, 2026

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
Published on: August 30, 2018
[Aspects of calculated and controlled antibiotic therapy]
1Institut Medizinische Mikrobiologie und Infektionsepidemiologie, Universität Leipzig.
For severe infections like peritonitis, initial broad-spectrum antimicrobial therapy is crucial. After 48-72 hours, reassess and de-escalate treatment based on microbiological results for better patient outcomes.
Area of Science:
- Infectious Diseases
- Pharmacology
- Clinical Medicine
Context:
- Severe infections, such as peritonitis, carry a high risk of mortality if initial antimicrobial treatment fails.
- Antimicrobial selection strategies include empirical therapy, escalation, and de-escalation.
- The prognosis of severe infections is critically dependent on the effectiveness of the initial therapeutic approach.
Purpose:
- To outline optimal antimicrobial selection and de-escalation strategies for severe and life-threatening infections.
- To emphasize the importance of initial broad-spectrum therapy in cases with poor prognosis.
- To guide the reconsideration and adjustment of antimicrobial therapy based on microbiological data.
Summary:
- Initial antimicrobial therapy for severe infections should prioritize broad-spectrum agents with high efficacy, irrespective of cost or selection pressure.
- Following 48 to 72 hours of treatment, therapy should be reassessed and potentially de-escalated to less potent agents.
- Microbiological test results are essential for informing the de-escalation of antimicrobial therapy.
Impact:
- Improved patient outcomes in severe infections by ensuring effective initial treatment and appropriate subsequent de-escalation.
- Reduced development of antimicrobial resistance through judicious use of broad-spectrum agents.
- Enhanced clinical decision-making for antimicrobial stewardship in critical care settings.
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