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Related Concept Videos

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

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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...
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...
Antibiotic Selection00:57

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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...
Antimicrobial Effectiveness01:28

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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...

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Related Experiment Video

Updated: Jul 14, 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

Update on the antibacterial resistance crisis.

Arthur C Croft1, Anthony V D'Antoni, Stephanie L Terzulli

  • 1Spine Research Institute of San Diego, Spring Valley, CA 91978, USA. drcroft@srisd.com

Medical Science Monitor : International Medical Journal of Experimental and Clinical Research
|May 31, 2007
PubMed
Summary

Antibacterial drug resistance is a growing global crisis, with evolving bacteria becoming resistant to multiple drugs. This necessitates shared responsibility among healthcare, agriculture, and consumers to combat this public health threat.

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

Published on: August 30, 2018

Related Experiment Videos

Last Updated: Jul 14, 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

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

Area of Science:

  • Microbiology
  • Public Health
  • Pharmacology

Background:

  • The discovery of penicillin ushered in an era of effective infectious disease control.
  • Bacterial adaptation has led to increasing resistance against previously effective antimicrobial drugs.
  • Emergence of multidrug-resistant and panresistant bacterial strains poses a significant public health challenge.

Purpose of the Study:

  • To discuss the escalating crisis of antibacterial drug resistance.
  • To examine the factors contributing to the development of resistant bacterial strains.
  • To advocate for shared responsibility in addressing antimicrobial resistance.

Main Methods:

  • Review of historical trends in antibacterial drug development and efficacy.
  • Analysis of factors contributing to bacterial resistance.
  • Discussion of the roles of various stakeholders in the resistance crisis.

Main Results:

  • Effectiveness of antimicrobial drugs has waned due to bacterial adaptation.
  • Resistant bacterial infections are increasingly prevalent in both hospital-acquired and community-acquired settings.
  • Pharmaceutical industry's declining interest in developing new antimicrobial agents exacerbates the problem.

Conclusions:

  • Antibacterial drug resistance is a complex issue driven by multifaceted selective pressures.
  • Healthcare workers, facilities, the agriculture industry, and consumers all play a role in driving resistance.
  • A collaborative, shared approach is essential to combat the growing threat of antimicrobial resistance.