Abstract:
:We studied the population genetic structure of 360 and 1247 adult Schistosoma mansoni using seven microsatellite and seven random amplified polymorphic DNA (RAPD) markers, respectively. Parasites were collected from their natural definitive host Rattus rattus in Guadeloupe (West Indies). We found a sex-specific genetic structure, a pattern never before reported in a parasitic organism. Male genotypes were more randomly distributed among rats than female genotypes. This interpretation was consistent with a lower differentiation between hosts for males relative to females, the higher genetic similarity between females in the same host and the observed local (i.e. within-individual-host) differences in allele frequencies between the two sexes. We discuss our results using ecological and immunological perspectives on host-parasite relationships. These results change our view on the epidemiology of schistosomiasis, a serious disease affecting humans in African and American intertropical zones.
journal_name
Mol Ecoljournal_title
Molecular ecologyauthors
Prugnolle F,De Meeûs T,Durand P,Sire C,Théron Adoi
10.1046/j.1365-294x.2002.01518.xsubject
Has Abstractpub_date
2002-07-01 00:00:00pages
1231-8issue
7eissn
0962-1083issn
1365-294Xpii
1518journal_volume
11pub_type
杂志文章abstract::The carabid beetle Pterostichus melanarius is a major natural enemy of pests, such as aphids and slugs in agricultural systems. Earthworms are a dominant non-pest component of the diet of P. melanarius which help sustain the beetles during periods when the pest population is low or absent. In this study we wanted to t...
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pub_type: 评论,新闻
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