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Title: Plasmodium vivax Diversity and Population Structure across Four Continents
Author: Koepfli, Cristian
Rodrigues, Priscilla T.
Antao, Tiago
Orjuela-Sanchez, Pamela
Van den Eede, Peter
Gamboa, Dionicia
Hong, Nguyen van
Bendezu, Jorge
Erhart, Annette
Barnadas, Céline
Ratsimbasoa, Arsène
Menard, Didier
Severini, Carlo
Menegon, Michela
Nour, Bakri Y. M.
Karunaweera, Nadira
Mueller, Ivo
Ferreira, Marcello U.
Felger, Ingrid
Keywords: Plasmodium vivax
Geografia mèdica
Salut pública
Plasmodium vivax
Medical geography
Public health
Issue Date: 30-Jun-2015
Publisher: Public Library of Science (PLoS)
Abstract: Plasmodium vivax is the geographically most widespread human malaria parasite. To analyze patterns of microsatellite diversity and population structure across countries of different transmission intensity, genotyping data from 11 microsatellite markers was either generated or compiled from 841 isolates from four continents collected in 1999-2008. Diversity was highest in South-East Asia (mean allelic richness 10.0-12.8), intermediate in the South Pacific (8.1-9.9) Madagascar and Sudan (7.9-8.4), and lowest in South America and Central Asia (5.5-7.2). A reduced panel of only 3 markers was sufficient to identify approx. 90% of all haplotypes in South Pacific, African and SE-Asian populations, but only 60-80% in Latin American populations, suggesting that typing of 2-6 markers, depending on the level of endemicity, is sufficient for epidemiological studies. Clustering analysis showed distinct clusters in Peru and Brazil, but little sub-structuring was observed within Africa, SE-Asia or the South Pacific. Isolates from Uzbekistan were exceptional, as a near-clonal parasite population was observed that was clearly separated from all other populations (FST>0.2). Outside Central Asia FST values were highest (0.11-0.16) between South American and all other populations, and lowest (0.04-0.07) between populations from South-East Asia and the South Pacific. These comparisons between P. vivax populations from four continents indicated that not only transmission intensity, but also geographical isolation affect diversity and population structure. However, the high effective population size results in slow changes of these parameters. This persistency must be taken into account when assessing the impact of control programs on the genetic structure of parasite populations.
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It is part of: PLoS Neglected Tropical Diseases, 2015, vol. 9, num. 6, p. e0003872
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ISSN: 1935-2727
Appears in Collections:Articles publicats en revistes (ISGlobal)

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