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Related Concept Videos

Antibiotic Selection00:57

Antibiotic Selection

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Dosage Regimen: Individualization01:24

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Individualization in dosing regimens is the customization of medication doses for individual patients. Its necessity arises from the goal of maximizing therapeutic benefits while minimizing risks. This approach is pivotal because human responses to drugs can vary widely; what is effective for one person may be inadequate or excessive for another. Interpatient (intersubject) variability refers to differences in drug responses between individuals, while intrapatient (intrasubject) variability...
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Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
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Production of Antibiotics01:27

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Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
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Mechanism of Antibiotic Resistance in MRSA01:25

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Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and...
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Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within...
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Updated: Mar 27, 2026

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
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Individualized antibiotic strategies.

Fabio S Taccone1, Ottavia Bond, Federica Z Cavicchi

  • 1aDepartment of Intensive Care bDepartment of Infectious Diseases, Hôpital Erasme, Université Libre de Bruxelles (ULB), Brussels, Belgium.

Current Opinion in Anaesthesiology
|January 15, 2016
PubMed
Summary
This summary is machine-generated.

Optimizing antibiotic therapy for critically ill patients requires careful consideration of treatment timing, drug combinations, and dosing. Individualizing antimicrobial strategies based on patient factors and pathogen susceptibility is crucial for effective infection management.

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Area of Science:

  • Critical Care Medicine
  • Infectious Diseases
  • Pharmacology

Background:

  • Infections are frequent in critically ill patients, necessitating antibiotic treatment.
  • Antibiotic efficacy is influenced by timing, combination therapy, and dosing strategies.
  • Optimal antimicrobial delivery is challenging due to altered pharmacokinetics in critical illness.

Purpose of the Study:

  • To review the complexities of antibiotic therapy in critically ill patients.
  • To highlight factors influencing antimicrobial efficacy and patient outcomes.
  • To emphasize the need for individualized treatment approaches.

Main Methods:

  • Review of current literature on antibiotic use in intensive care units (ICUs).
  • Analysis of factors affecting antimicrobial pharmacokinetics and pharmacodynamics in critical illness.
  • Evaluation of diagnostic and therapeutic strategies for severe infections.

Main Results:

  • Early infection diagnosis is essential for prompt and effective antibiotic therapy.
  • Combination therapy may be required for resistant strains or severe conditions like septic shock.
  • Altered pharmacokinetics in critically ill patients necessitate higher or adjusted antibiotic doses.
  • Nebulized antibiotics show promise for ventilator-associated pneumonia with multidrug-resistant pathogens.

Conclusions:

  • Individualizing antibiotic therapy is paramount for managing severe infections in ICUs.
  • Treatment decisions must consider patient specifics, infecting organisms, and susceptibility.
  • Optimizing antimicrobial use remains a significant challenge for ICU physicians.