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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...
Mechanism of Antibiotic Resistance in MRSA01:25

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...
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...
Endocarditis IV: Nursing Management01:29

Endocarditis IV: Nursing Management

Infective endocarditis (IE) is a chronic infection of the heart's endocardium, primarily affecting the heart valves. A detailed nursing assessment for a patient with IE involves collecting subjective and objective data to ensure an accurate diagnosis and timely intervention.Subjective DataThe nurse gathers information about the patient's symptoms and complaints during the subjective assessment. Patients with infective endocarditis often report non-specific symptoms that can mimic other...
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...
Antibiotic Selection00:57

Antibiotic Selection

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Updated: May 18, 2026

Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection
11:56

Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection

Published on: October 25, 2013

[Vancomycin-resistant enterococcus--chronicle of a foretold problem].

Marc J M Bonten1, Rob J Willems

  • 1Universitair Medisch Centrum Utrecht, afd. Medische Microbiologie, Utrecht, the Netherlands. mbonten@umcutrecht.nl

Nederlands Tijdschrift Voor Geneeskunde
|September 21, 2012
PubMed
Summary
This summary is machine-generated.

Recent vancomycin-resistant enterococci (VRE) outbreaks in Dutch hospitals are linked to an endemic amoxicillin-resistant, vancomycin-susceptible Enterococcus faecium subpopulation. Transposons carrying resistance genes likely facilitated VRE spread, necessitating hospital screening and posing eradication challenges.

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Population and Single-Cell Analysis of Antibiotic Persistence in Escherichia coli
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Last Updated: May 18, 2026

Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection
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Published on: October 25, 2013

Population and Single-Cell Analysis of Antibiotic Persistence in Escherichia coli
12:29

Population and Single-Cell Analysis of Antibiotic Persistence in Escherichia coli

Published on: March 24, 2023

Area of Science:

  • Clinical microbiology
  • Molecular epidemiology
  • Infectious disease outbreaks

Context:

  • 12 recent outbreaks of vancomycin-resistant enterococci (VRE) infections in Dutch hospitals.
  • VRE outbreaks were previously uncommon despite early reports nearly 12 years ago.
  • A specific subpopulation of Enterococcus faecium, amoxicillin-resistant yet vancomycin-susceptible, has become highly endemic over the past 12 years.

Purpose:

  • To investigate the reasons behind the recent increase in VRE outbreaks in Dutch hospitals.
  • To understand the molecular mechanisms and epidemiological factors contributing to VRE emergence.

Summary:

  • Molecular epidemiological studies reveal the endemicity of a specific Enterococcus faecium subpopulation.
  • Transposons containing vancomycin-resistance genes are suggested to have been introduced into this subpopulation.
  • Nosocomial spread of these resistant strains has been observed, leading to outbreaks.

Impact:

  • Recommends screening high-risk patients in hospitals without detected VRE outbreaks.
  • Highlights the potential difficulty and cost associated with VRE eradication if widespread transmission has occurred.
  • Informs public health strategies for managing and preventing VRE infections in healthcare settings.