Publications des scientifiques de l'IRD

Tibayrenc Michel, Kjellberg F., Ayala F.J. (1990). A clonal theory of parasitic protozoa : the population structures of Entamoeba, Giardia, Leishmania, Naegleria, Plasmodium, Trichomonas, and Trypanosoma and their medical and taxonomical consequences. Proceedings of the National Academy of Science, 87, p. 2414-2418.

Titre du document
A clonal theory of parasitic protozoa : the population structures of Entamoeba, Giardia, Leishmania, Naegleria, Plasmodium, Trichomonas, and Trypanosoma and their medical and taxonomical consequences
Année de publication
1990
Type de document
Article
Auteurs
Tibayrenc Michel, Kjellberg F., Ayala F.J.
Source
Proceedings of the National Academy of Science, 1990, 87, p. 2414-2418
We propose a general theory of clonal reproduction for parasitic protozoa, which has important medical and biological consequences. Many parasitic protozoa have been assumed to reproduce sexually, because of diploidy and occasional sexuality in the laboratory. However, a population genetic analysis of extensive data on biochemical polymorphisms indicates that the two fundamental consequences of sexual reproduction (i.e. segregation and recombination) are apparently rare or absent in natural populations of the parasitic protozoa. Moreover, the clones recorded appear to be stable over large geographical areas and long periods of time. A clonal population structure demands that the medical attributes of clones be separately characterized; ubiquitous clones call for priority characterization. Uniparental reproduction renders unsatisfactory Linnean taxonomy; this needs to be supplemented by the "natural clone" as an additional taxonomic unit, which is best defined by means of genetic markers. (Résumé d'auteur)
Plan de classement
Biologie [020BIOL] ; Médecine [050MEDECI]
Descripteurs
PARASITE ; STRUCTURE DE POPULATION ; REPRODUCTION ASEXUEE ; CHIMIOTAXONOMIE ; CLONE ; MARQUEUR GENETIQUE ; STABILITE GENETIQUE ; PROTOZOAIRE
Localisation
Fonds IRD [F B31838]
Identifiant IRD
fdi:31838
Contact