PMID: 8939047Dec 1, 1996Paper

Distribution of schistosome genetic diversity within naturally infected Rattus rattus detected by RAPD markers

Parasitology
V BarralA Théron

Abstract

Random amplified polymorphic DNA markers (RAPD) were used to visualize the genetic diversity within and between infrapopulations of Schistosoma mansoni recovered from the natural vertebrate host, Rattus rattus, trapped at an insular Guadeloupean focus. Phenotypes were characterized by the sex of the parasites and by 8 polymorphic markers generated by 3 primers. Among the 212 parasite individuals recovered from 10 infected rats, 78 genotypes were characterized. All the hosts naturally infected harboured multiple parasite genotypes with a maximum diversity of 28 genotypes/host. Phenotypic and genotypic diversity calculated by Shannon-Wiener's indices and Lynch and Milligan's estimators respectively is, on average, greater within than between hosts. Considering the very low snail infection rates observed in this focus and the rapid turnover of the vertebrate hosts, our results suggest that the high mobility of the vertebrate host and/or plurimiracidial snail infections could be factors responsible for parasite genetic diversity within hosts.

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Citations

Oct 5, 2010·The American Journal of Tropical Medicine and Hygiene·Alice J NortonJoanne P Webster
Jul 5, 2006·Parasitology·R E SorensenD J Minchella
Nov 13, 2004·The American Naturalist·J P WebsterL Blair
Jul 22, 2005·Journal of Evolutionary Biology·G RauchT B H Reusch
Aug 19, 2004·Molecular Ecology·Franck PrugnolleThierry De Meeûs
Oct 7, 2004·Theoretical Population Biology·J BoissierH Moné
Oct 4, 2008·Acta Tropica·Rosana Gentile, Guilherme Oliveira
Sep 11, 2007·International Journal for Parasitology·E A ThieleD J Minchella

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