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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...
Tuberculosis01:23

Tuberculosis

Tuberculosis (TB) remains a significant global health concern, primarily targeting the lungs and spreading through airborne transmission. Infection begins when aerosolized droplet nuclei, expelled by an individual with active TB, are inhaled by another person. These microscopic particles carry Mycobacterium tuberculosis, the causative agent of TB. Upon reaching the alveoli, the bacilli are engulfed by alveolar macrophages. However, due to their specialized lipid-rich cell wall, these pathogens...
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.
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 II01:28

Pulmonary Tuberculosis II

Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
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

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Modeling Tuberculosis in Mycobacterium marinum Infected Adult Zebrafish
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Published on: October 8, 2018

Does M. tuberculosis genomic diversity explain disease diversity?

Mireilla Coscolla1, Sebastien Gagneux

  • 1Swiss Tropical and Public Health Institute, Basel, Switzerland.

Drug Discovery Today. Disease Mechanisms
|November 16, 2010
PubMed
Summary

The variability in tuberculosis outcomes may stem from Mycobacterium tuberculosis complex (MTBC) genetic differences, not just host or environmental factors. Further research is needed to link MTBC genomic diversity to human disease.

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Area of Science:

  • Microbiology
  • Genomics
  • Epidemiology

Background:

  • Tuberculosis (TB) infection outcomes vary significantly.
  • This variability is often attributed to host and environmental factors.
  • Emerging evidence suggests bacterial factors within the Mycobacterium tuberculosis complex (MTBC) may also contribute.

Purpose of the Study:

  • To explore the role of MTBC genomic diversity in TB disease variability.
  • To investigate whether observed phenotypic differences in MTBC strains correlate with human disease outcomes.
  • To highlight the need for integrated approaches in understanding TB pathogenesis.

Main Methods:

  • Comprehensive review of nearly 100 published reports on MTBC.
  • Analysis of experimental models assessing MTBC strain virulence and immunogenicity.
  • Discussion of systems epidemiology and evolutionary frameworks.

Main Results:

  • MTBC strains exhibit varying virulence and immunogenicity in experimental models.
  • The direct impact of this phenotypic variation on human TB disease remains undetermined.
  • Genomic diversity within MTBC is increasingly recognized.

Conclusions:

  • Bacterial genomic factors are a plausible contributor to TB outcome variability.
  • Linking MTBC genotypic diversity to clinical phenotypes requires integrated research.
  • A systems epidemiology approach within an evolutionary framework is essential for future studies.