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Related Concept Videos

Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

1.5K
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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Antibiotic Selection00:57

Antibiotic Selection

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Overview
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Bacterial Transformation01:33

Bacterial Transformation

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In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.
Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...
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Resistivity01:22

Resistivity

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When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
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Resistance01:19

Resistance

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When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
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Equivalent Resistance01:16

Equivalent Resistance

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In circuit analysis, situations often arise where resistors are neither in series nor parallel configurations. To tackle such scenarios, three-terminal equivalent networks like the wye (Y) (Figure 1 (a)) or tee (T) and delta (Δ) (Figure 1 (b)) or pi (π) networks come into play. These networks offer versatile solutions and are frequently encountered in various applications, including three-phase electrical systems, electrical filters, and matching networks.
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Related Experiment Video

Updated: Jan 29, 2026

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

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[Bacterial resistance to antibiotics]

P Moreillon1

  • 1Département de médecine interne, CHUV, Lausanne.

Schweizerische Medizinische Wochenschrift
|June 10, 1995
PubMed
Summary

Antibiotic resistance is a growing threat due to widespread use. Understanding bacterial resistance mechanisms and proper antibiotic use is crucial to preserve these vital medications.

Area of Science:

  • Microbiology
  • Pharmacology
  • Infectious Diseases

Background:

  • Antibiotics revolutionized medicine by combating bacterial infections, previously a leading cause of mortality.
  • Widespread and improper antibiotic use has driven the evolution of antibiotic resistance.
  • Multidrug-resistant pathogens pose a significant global health challenge.

Purpose of the Study:

  • To review the mechanisms of bacterial antibiotic resistance.
  • To emphasize the importance of understanding resistance to guide effective antibiotic use.
  • To highlight strategies for controlling the spread of antibiotic resistance.

Main Methods:

  • Review of bacterial resistance mechanisms: permeability modification, target alteration, antibiotic inactivation.
  • Discussion of genetic transfer systems facilitating resistance gene accumulation.

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Antibiotic Dereplication Using the Antibiotic Resistance Platform

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Related Experiment Videos

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Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
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Visualization of Bacterial Resistance using Fluorescent Antibiotic Probes
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  • Analysis of clinical and epidemiological data for appropriate antibiotic selection.

    • Main Results:

    • Bacteria employ diverse strategies to resist antibiotics, including altering cell permeability and inactivating drugs.
    • Efficient genetic exchange allows rapid dissemination of resistance genes among bacteria.
    • Pathogens like MRSA and MDR-TB demonstrate resistance to most available antibiotics.

    Conclusions:

    • Antibiotic resistance necessitates a comprehensive understanding of its mechanisms and transmission.
    • Judicious antibiotic use, guided by clinical and microbiological data, is essential.
    • Adherence to chemotherapy principles, including appropriate dosing, is critical to combat resistance.