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Related Concept Videos

Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

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 the One...
Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
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Mechanism of Antibiotic Resistance in MRSA

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 acquisition...
Antimicrobial Effectiveness01:28

Antimicrobial Effectiveness

The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
Acute Pyelonephritis II: Diagnostic Studies and Management01:28

Acute Pyelonephritis II: Diagnostic Studies and Management

Introduction:For diagnosing acute pyelonephritis, a comprehensive patient history is collected to identify symptoms such as dysuria, frequent or urgent urination, flank pain, or costovertebral angle (CVA) tenderness that may suggest a kidney infection.Physical ExaminationDuring the physical examination, CVA tenderness is assessed. This involves gentle percussion over the costovertebral angle, where tenderness often indicates a kidney infection.Diagnostic TestsUrinalysis: Used to identify white...
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Gentamicin, an aminoglycoside antibiotic, is commonly administered via intermittent intravenous infusion to treat severe infections. An intermittent one-hour infusion of gentamicin, administered at eight-hour intervals, allows for precise control of plasma drug concentrations, minimizing toxicity while ensuring therapeutic efficacy. Pharmacokinetic principles govern the dynamics of plasma concentrations and can be mathematically described using specific equations.The plasma drug concentration...

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Updated: May 21, 2026

Assay Development for High-Throughput Drug Screening Against Mycobacteria
07:50

Assay Development for High-Throughput Drug Screening Against Mycobacteria

Published on: October 25, 2024

Daptomycin for highly resistant Enterococcus faecium infection.

Christiane Rosin1, Christine Bernsmeier, José M Entenza

  • 1Division of Infectious Diseases and Hospital Epidemiology, University Hospital, Basel, Switzerland. rosinc@uhbs.ch

Swiss Medical Weekly
|June 28, 2012
PubMed
Summary
This summary is machine-generated.

Daptomycin shows promise for treating severe Enterococcus faecium infections, even in cases resistant to other antibiotics. This salvage therapy offers a potentially safe and effective option for challenging Gram-positive bacterial infections.

Related Experiment Videos

Last Updated: May 21, 2026

Assay Development for High-Throughput Drug Screening Against Mycobacteria
07:50

Assay Development for High-Throughput Drug Screening Against Mycobacteria

Published on: October 25, 2024

Area of Science:

  • Infectious Diseases
  • Antimicrobial Resistance
  • Clinical Pharmacology

Background:

  • Enterococcus faecium is a significant cause of nosocomial infections.
  • High rates of resistance to common antibiotics like ampicillin and gentamicin complicate treatment.
  • Patients often present with severe underlying conditions and prior broad-spectrum antibiotic exposure.

Observation:

  • This case series evaluated 11 patients with severe E. faecium infections.
  • All E. faecium strains were ampicillin-resistant and vancomycin-susceptible.
  • Seven out of 11 strains exhibited high-level gentamicin resistance.

Findings:

  • Patients received daptomycin as a salvage therapy.
  • Daptomycin demonstrated potential efficacy in treating these difficult E. faecium infections.
  • The treatment appeared safe in this patient cohort.

Implications:

  • Daptomycin may be a valuable therapeutic option for refractory E. faecium infections.
  • Further research is warranted to confirm daptomycin's role in managing resistant enterococcal infections.
  • This finding could influence treatment guidelines for severe Gram-positive bacterial infections.