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

被引：43

作者：

Barral, V ^{[1
]}

Morand, S ^{[1
]}

Pointer, JP ^{[1
]}

Theron, A ^{[1
]}

机构：

[1] UNIV PERPIGNAN, ECOLE PRAT HAUTES ETUD, LAB BIOL MARINE & MALACOL, F-66860 PERPIGNAN, FRANCE

来源：

PARASITOLOGY | 1996年 / 113卷

关键词：

genetic diversity; vertebrate host; Schistosoma mansoni; Rattus rattus; RAPD; parasite population;

D O I：

10.1017/S003118200006755X

中图分类号：

R38 [医学寄生虫学]; Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ; 100103 ;

摘要：

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.

引用

页码：511 / 517

页数：7

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