Relevant units of analysis for applied and basic research dealing with neglected transmissible diseases: The

Michel Tibayrenc1, Francisco J Ayala2

  • 1Maladies Infectieuses et Vecteurs Ecologie, Génétique, Evolution et Contrôle MIVEGEC (IRD 224-CNRS 5290-UM1-UM2), Institut de Rercherche pour le Développement (IRD), Montpellier, France.

Insights

The predominant clonal evolution (PCE) model provides a unified population genetics framework for micropathogens. This framework defines stable units for studying and controlling diseases like neglected tropical diseases.

Area of Science:

  • Population genetics
  • Evolutionary biology
  • Microbiology

Background:

  • The predominant clonal evolution (PCE) model offers a unified population genetics framework for diverse micropathogens.
  • It defines clonality based on population structure, specifically restrained genetic recombination.
  • This model enables the identification of stable, discrete units below the species level, such as clonal genotypes and near-clades.

Purpose of the Study:

  • To highlight the practical significance of the PCE model for studying and controlling neglected tropical diseases.
  • To make the PCE model's applications accessible to a broad scientific audience, including epidemiologists, field scientists, and clinicians.
  • To emphasize the utility of PCE-defined units for clinical, epidemiological, and evolutionary research.

Main Methods:

  • Review of existing literature on the PCE model.
  • Emphasis on the practical applications and implications of the PCE model.
  • Brief mention of the evolutionary and population genetics background.

Main Results:

  • The PCE model facilitates the definition of stable, clearly delimited units of analysis (clonal genotypes, near-clades).
  • These units are valuable for clinical and epidemiological studies, vaccine and drug design, and evolutionary research.
  • The model's properties are of strong interest for both applied and basic research.

Conclusions:

  • The PCE model provides a robust framework for understanding micropathogen populations.
  • Its practical applications are crucial for the control of neglected tropical diseases.
  • The PCE model's clear units of analysis enhance research in various biological and medical fields.

Related Concept Videos

Viral Mutations00:36

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
40.1K
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...
786
Steps in Outbreak Investigation01:18

Steps in Outbreak Investigation

In the ever-evolving field of public health, statistical analysis serves as a cornerstone for understanding and managing disease outbreaks. By leveraging various statistical tools, health professionals can predict potential outbreaks, analyze ongoing situations, and devise effective responses to mitigate impact. For that to happen, there are a few possible stages of the analysis:
653
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...
2.1K
Principles of Disease Surveillance01:26

Principles of Disease Surveillance

Disease surveillance is the systematic collection, analysis, and interpretation of health data essential to the planning, implementation, and evaluation of public health practice. This process integrates data dissemination to entities responsible for preventing and controlling disease, injury, and disability. Surveillance systems provide crucial information for action, helping public health authorities make informed decisions to manage and prevent outbreaks, ensure public safety, optimize...
718
Viral Recombination00:57

Viral Recombination

Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
25.4K