Phylogeny of seven Bulinus species originating from endemic areas in three African countries, in relation to the human blood fluke Schistosoma haematobium

摘要: Snails species belonging to the genus Bulinus (Planorbidae) serve as intermediate host for flukes Schistosoma (Digenea, Platyhelminthes). Despite its importance in transmission of these parasites, evolutionary history this is still obscure. In present study, we used partial mitochondrial cytochrome oxidase subunit I (cox1) gene, and nuclear ribosomal ITS, 18S 28S genes investigate haplotype diversity phylogeny seven originating from three endemic countries Africa (Cameroon, Senegal Egypt). The cox1 region showed much more variation than markers within sequences. High levels genetic were detected at all loci studied species, with clear segregation between individuals appearance different haplotypes, even same locality. Sequences clustered into two lineages; (A) groups truncatus, B. tropicus, globosus umbilicatus; while (B) forskalii, senegalensis camerunensis. Interesting patterns emerge regarding schistosome susceptibility: lower are predicted have higher infection prevalence those greater susceptibility. results reported study very important since a detailed understanding population structure essential understand epidemiology many parasites.