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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.
Abstract:
The predominant clonal evolution (PCE) model seeks to formulate a common population genetics framework for all micropathogens (namely, parasitic protozoa, fungi and yeasts, bacteria, and viruses). It relies on a definition of clonality that is only based on population structure features (namely, strongly restrained genetic recombination). Its clear-cut properties make it of strong interest for applied and basic research, since it permits the definition of stable, clearly delimited units of analysis below the species level: clonal genotypes and discrete genetic subdivisions ("near-clades"). These units of analysis can be used for clinical and epidemiological studies, vaccine and drug design, species description, and evolutionary studies on natural and experimental populations. In this review, the evolutionary and population genetics background of the model will be only briefly mentioned, while considerable emphasis will be given to its practical significance for the study and control of neglected tropical diseases. The goal of the paper is to make this practical usefulness accessible to a broad audience of readers, including scientists who are not evolution specialists, such as epidemiologists, field scientists, and clinicians. For extensive developments about the evolutionary background of the model, see our previous papers [1-9]. Citations of these former articles lead to the many references quoted in them, which cannot be listed again here.
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.
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