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Related Concept Videos

Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
Evolution of Microbial Genome01:08

Evolution of Microbial Genome

Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Genetic Variation01:25

Genetic Variation

Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles, which...
Applications of Molecular Taxonomy01:20

Applications of Molecular Taxonomy

Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:

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Related Experiment Video

Updated: May 11, 2026

Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray
07:35

Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray

Published on: April 25, 2014

Genetic diversity in Mycobacterium tuberculosis.

Sebastien Gagneux1

  • 1Swiss Tropical and Public Health Institute (Swiss TPH), University of Basel, Basel, Switzerland, Sebastien.Gagneux@unibas.ch.

Current Topics in Microbiology and Immunology
|May 17, 2013
PubMed
Summary

Mycobacterium tuberculosis (M. tuberculosis) genetic diversity influences virulence and immunogenicity. Linking experimental findings to clinical outcomes remains challenging, but new sequencing technologies offer insights into host-pathogen interactions for tuberculosis control.

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Area of Science:

  • Microbiology
  • Genetics
  • Immunology

Background:

  • Recent research highlights significant strain-to-strain variation within Mycobacterium tuberculosis.
  • The M. tuberculosis complex (MTBC) exhibits greater genetic diversity than previously understood.
  • This genetic diversity is linked to differences in immunogenicity and virulence in experimental models.

Purpose of the Study:

  • To explore the clinical relevance of MTBC genetic diversity.
  • To investigate the link between experimental phenotypes and clinical outcomes.
  • To leverage new technologies for understanding host-pathogen interactions in tuberculosis.

Main Methods:

  • Analysis of Mycobacterium tuberculosis population structure.
  • Experimental infection models to assess immunogenicity and virulence.
  • Application of high-throughput technologies, including next-generation sequencing.

Main Results:

  • Established link between MTBC genetic diversity and differential immunogenicity/virulence in experimental settings.
  • Difficulty in translating experimental findings to direct clinical phenotypes.
  • Emerging insights from next-generation sequencing into MTBC diversity.

Conclusions:

  • MTBC genetic diversity plays a role in tuberculosis pathogenesis.
  • Bridging the gap between experimental and clinical observations is crucial.
  • Systems approaches are essential for understanding MTBC diversity's impact on tuberculosis and for developing control strategies.