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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...
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Antibiotic Selection

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Microbiota Modulation by Antibiotics01:21

Microbiota Modulation by Antibiotics

Antibiotics have revolutionized modern medicine by saving countless lives from bacterial infections. However, their widespread use has inadvertently harmed the delicate balance of the human gut microbiota. The gut microbiota, a complex community of bacteria, archaea, viruses, and fungi, plays a vital role in regulating metabolism, immune responses, and maintaining intestinal health. Antibiotics, especially broad-spectrum types, disrupt this ecosystem by eradicating both harmful and beneficial...
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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...
Combined Effects of Drugs: Synergism01:27

Combined Effects of Drugs: Synergism

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.
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Related Experiment Video

Updated: Jun 20, 2026

Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
08:58

Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes

Published on: March 3, 2023

Antibiotics for emerging pathogens.

Michael A Fischbach1, Christopher T Walsh

  • 1Department of Molecular Biology and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA 02114, USA. fischbach@fischbachgroup.org

Science (New York, N.Y.)
|August 29, 2009
PubMed
Summary
This summary is machine-generated.

New strategies are urgently needed to discover novel antibiotic scaffolds to combat rising drug-resistant bacteria. Exploring new microbial sources and repurposing synthetic molecules offers promising avenues for antibiotic development.

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Antibiotic Dereplication Using the Antibiotic Resistance Platform
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Last Updated: Jun 20, 2026

Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
08:58

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Published on: March 3, 2023

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
11:17

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

Published on: August 30, 2018

Antibiotic Dereplication Using the Antibiotic Resistance Platform
10:49

Antibiotic Dereplication Using the Antibiotic Resistance Platform

Published on: October 17, 2019

Area of Science:

  • Microbiology
  • Medicinal Chemistry
  • Drug Discovery

Background:

  • Increasing prevalence of antibiotic-resistant pathogenic bacteria in healthcare settings and communities.
  • Slow progress in developing new antibiotics due to reliance on established molecular scaffolds.
  • Emergence of multidrug resistance necessitates the discovery of novel antibiotic scaffolds.

Purpose of the Study:

  • To highlight the urgent need for new antibiotic scaffolds.
  • To discuss promising approaches for discovering novel antibiotic scaffolds.
  • To address the challenge of multidrug resistance in bacterial pathogens.

Main Methods:

  • Mining underexplored microbial niches for natural products.
  • Designing screening methods to avoid rediscovering known scaffolds.
  • Repurposing existing libraries of synthetic molecules for antibiotic discovery.

Main Results:

  • Identification of promising approaches for novel antibiotic scaffold discovery.
  • Potential for new antibiotics to combat multidrug-resistant pathogens.
  • Diversification of strategies beyond traditional synthetic tailoring.

Conclusions:

  • Discovering new molecular scaffolds is a priority to combat antibiotic resistance.
  • Novel approaches like exploring microbial niches and repurposing synthetic libraries show promise.
  • Urgent development of new antibiotics is critical for public health.