A clonal theory of parasitic protozoa : the population structures of #Entamoeba$, #Giardia$, #Leishmania$, #Naegleria$, #Plasmodium$, #Trichomonas$, and #Trypanosoma$ and their medical and taxonomical consequences

A clonal theory of parasitic protozoa : the population structures of #Entamoeba$, #Giardia$, #Leishmania$, #Naegleria$, #Plasmodium$, #Trichomonas$, and #Trypanosoma$ and their medical and taxonomical consequences Tibayrenc Michel auteur aut IRD Kjellberg F. auteur aut IRD Ayala F.J. auteur aut IRD text journalArticle eng text/pdf reformatted digital access 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) specialized PARASITE STRUCTURE DE POPULATION REPRODUCTION ASEXUEE CHIMIOTAXONOMIE CLONE MARQUEUR GENETIQUE STABILITE GENETIQUE PROTOZOAIRE 050MEDECI 020BIOL Proceedings of the National Academy of Science 87 2414-2418 1990 https://www.documentation.ird.fr/hor/fdi:31838 10.1073/pnas.87.7.2414 [F B31838] https://www.documentation.ird.fr/hor/fdi:31838 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/b_fdi_30-30/31838.pdf IRD - Base Horizon / Pleins textes 1991-07-09 2007-03-04 fdi:31838 fre