| evolutionary history and phylogeography of the schistosome-vector freshwater snail biomphalaria glabrata based on nuclear and mitochondrial dna sequences. | the phylogeography of the freshwater snail biomphalaria glabrata remains poorly known, although this species is the major vector of schistosomiasis in the new world. it was here investigated in south america and the lesser antilles, based on partial mitochondrial large ribosomal subunit (16s rdna) and nuclear internal transcribed spacer-2 (its-2) gene sequences. sampling included 17 populations from a large part of the current geographic range of the species (brazil, venezuela and lesser antille ... | 2002 | 12242642 |