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Related Concept Videos

Horizontal Gene Transfer01:27

Horizontal Gene Transfer

Horizontal gene transfer (HGT) is a process where genetic material moves between organisms within the same generation, unlike vertical gene transfer, which occurs from parent to offspring. HGT plays a crucial role in microbial evolution, adaptation, and survival, particularly in shared environments like the human gut.Mobile genetic elements such as plasmids, prophages, integrons, insertion sequences, and transposons facilitate this process. HGT occurs through three primary mechanisms:...
Types of Genetic Transfer Between Organisms02:18

Types of Genetic Transfer Between Organisms

Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
Types of Genetic Transfer Between Organisms02:18

Types of Genetic Transfer Between Organisms

Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
Transduction01:16

Transduction

Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome are...
Conjugation01:19

Conjugation

Conjugation is a form of horizontal gene transfer that primarily occurs in bacteria and some archaea, promoting genetic diversity and adaptation. Bacteria can acquire resistance genes through conjugative plasmids, allowing them to survive antibiotic treatments that would otherwise be lethal. This process involves direct contact between cells through specialized structures such as the sex pilus and is mediated by conjugative plasmids, including the F (fertility) factor.Conjugation requires...
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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Related Experiment Video

Updated: May 22, 2026

Methodology for the Study of Horizontal Gene Transfer in Staphylococcus aureus
10:39

Methodology for the Study of Horizontal Gene Transfer in Staphylococcus aureus

Published on: March 10, 2017

Horizontal gene transfer boosts MRSA spreading.

André Kriegeskorte1, Georg Peters

  • 1Institute of Medical Microbiology, University of Münster, Germany.

Nature Medicine
|May 8, 2012
PubMed
Summary

Horizontal gene transfer may explain the rise of dangerous methicillin-resistant Staphylococcus aureus (MRSA) strains. This process allows bacteria to share genes, potentially creating new epidemic-causing MRSA clones.

Area of Science:

  • Microbiology
  • Epidemiology
  • Genetics

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) poses a significant public health threat.
  • The emergence of new, highly virulent, and resistant MRSA clones is a growing concern.
  • Understanding the mechanisms driving MRSA epidemics is crucial for effective control strategies.

Purpose of the Study:

  • To investigate the potential role of horizontal gene transfer in the emergence of epidemic MRSA clones.
  • To provide new evidence linking genetic exchange to MRSA outbreaks.

Main Methods:

  • Analysis of genetic material from MRSA isolates.
  • Comparative genomics to identify gene transfer events.
  • Epidemiological data correlation with genetic findings.

More Related Videos

Detection of Horizontal Gene Transfer Mediated by Natural Conjugative Plasmids in E. coli
06:56

Detection of Horizontal Gene Transfer Mediated by Natural Conjugative Plasmids in E. coli

Published on: March 24, 2023

High-Resolution Comparison of Bacterial Conjugation Frequencies
05:18

High-Resolution Comparison of Bacterial Conjugation Frequencies

Published on: January 10, 2019

Related Experiment Videos

Last Updated: May 22, 2026

Methodology for the Study of Horizontal Gene Transfer in Staphylococcus aureus
10:39

Methodology for the Study of Horizontal Gene Transfer in Staphylococcus aureus

Published on: March 10, 2017

Detection of Horizontal Gene Transfer Mediated by Natural Conjugative Plasmids in E. coli
06:56

Detection of Horizontal Gene Transfer Mediated by Natural Conjugative Plasmids in E. coli

Published on: March 24, 2023

High-Resolution Comparison of Bacterial Conjugation Frequencies
05:18

High-Resolution Comparison of Bacterial Conjugation Frequencies

Published on: January 10, 2019

Main Results:

  • New evidence suggests horizontal gene transfer is involved in MRSA clone emergence.
  • Specific gene transfer mechanisms identified as potential drivers.
  • Correlation between genetic exchange and increased virulence/resistance observed.

Conclusions:

  • Horizontal gene transfer is a likely mechanism triggering MRSA epidemics.
  • This finding offers a new perspective on MRSA evolution and spread.
  • Further research into gene transfer mechanisms can inform public health interventions.