Related Experiment Video

Updated: Sep 27, 2026

Testing the Role of Multicopy Plasmids in the Evolution of Antibiotic Resistance
09:00

Testing the Role of Multicopy Plasmids in the Evolution of Antibiotic Resistance

Published on: May 2, 2018

[Mechanism of antibiotic resistance in bacteria responsible for respiratory infections]

D Dye1, J Croize, C Brambilla

  • 1Laboratoire de Bactériologie, CHU de Grenoble.

Revue Des Maladies Respiratoires
|January 1, 1995
PubMed

Insights

Bacterial resistance to antibiotics is evolving through mutations and genetic exchange, posing significant therapeutic challenges. Understanding resistant bacterial phenotypes and antibiotic combinations is crucial for effective treatment and preventing further resistance.

Area of Science:

  • Microbiology
  • Pharmacology
  • Infectious Diseases

Background:

  • Bacterial resistance to antibiotics is a pervasive and evolving global health concern.
  • Resistance mechanisms include chromosomal mutations and horizontal gene transfer via plasmids and transposons.
  • This phenomenon affects all classes of antibiotics, complicating treatment strategies.

Purpose of the Study:

  • To review the mechanisms of bacterial antibiotic resistance.
  • To highlight key resistant bacterial species and their clinical implications.
  • To emphasize the importance of recognizing resistant phenotypes and appropriate antibiotic stewardship.

Main Methods:

  • Literature review of bacterial resistance mechanisms.
  • Identification of prevalent antibiotic-resistant microorganisms.
  • Analysis of therapeutic challenges posed by resistant bacteria.

Main Results:

  • Antibiotic resistance arises from altered bacterial permeability and enzyme synthesis.
  • Key resistant pathogens include Staphylococcus aureus, Streptococcus pneumoniae, Haemophilus influenzae, Pseudomonas aeruginosa, and enterobacteria.
  • Significant therapeutic problems are encountered with multi-drug resistant strains.

Conclusions:

  • Effective anti-infective regimens require recognition of resistant bacterial phenotypes.
  • Judicious antibiotic combination therapy is essential for successful patient outcomes.
  • Proper antibiotic use is critical to limit the emergence and spread of resistant mutants.

More Related Videos

Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes08:58

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

Published on: March 3, 2023

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System05:06

Characterizing Multidrug Efflux Systems in Acinetobacter baumannii Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System

Published on: January 5, 2024

Related Concept Videos

Antibiotic Selection01:45

Antibiotic Selection

Researchers use antibiotic resistance genes to identify bacteria that possess a plasmid containing their gene of interest. Antibiotic resistance naturally occurs when a spontaneous DNA mutation creates changes in bacterial genes that eliminate antibiotic activity. Bacteria can share these new resistance genes with their offspring and other bacteria. The overuse and misuse of antibiotics have created a public health crisis, as resistant and multi-resistant bacteria continue to develop.Antibiotic...
Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
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...
Microbiota of the Respiratory Tract01:29

Microbiota of the Respiratory Tract

The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more like...
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...
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...