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Lack of molluscan host diversity and the transmission of an emerging parasitic disease in Bolivia
Author(s) -
Meunier C.,
Tirard, C.,
HurtrezBoussès S.,
Durand P.,
Bargues M. D.,
MasComa S.,
Pointier J. P.,
Jourdane J.,
Renaud F.
Publication year - 2001
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1046/j.1365-294x.2001.01284.x
Subject(s) - biology , snail , genetic diversity , fasciolosis , parasitic disease , fasciola hepatica , intermediate host , host (biology) , population , ecology , fasciola , parasitism , genetic variability , zoology , evolutionary biology , genotype , disease , helminths , genetics , gene , medicine , demography , pathology , sociology
Fasciolosis is a re‐emerging parasitic disease that affects an increasing number of people in developing countries. The most severe endemic affects the Bolivian Altiplano, where the liver fluke ( Fasciola hepatica ) and its hermaphroditic snail host, Lymnaea truncatula, have been introduced from Europe. To achieve a better understanding of the epidemiological situation and the consequences of the colonization event of this invasive species, genetic analysis of Bolivian snail populations was needed. Here we compare the genetic diversity and population structure of snail samples from the Bolivian Altiplano with samples from the Old World at six polymorphic microsatellite loci. Whereas some variability exists in the snail populations from the Old World, we observe only a single genotype of L. truncatula in the Bolivian Altiplano. We discuss the possible explanations for such a reduction in genetic variability, and, given the high natural parasitism pressures exerted on the snail populations, we discuss the relevance of this result for host–parasite interactions.