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The ITS2 of the genus Bulinus: Novel secondary structure among freshwater snails and potential new taxonomic markers.

Jørgensen, Aslak, Stothard, Russell ORCID:, Madsen, Henry, Nalugwa, Allen, Nyakaana, Silvester and Rollinson, David (2013) 'The ITS2 of the genus Bulinus: Novel secondary structure among freshwater snails and potential new taxonomic markers.'. Acta Tropica, Vol 128, Issue 2, pp. 218-225.

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The freshwater snail genus Bulinus has been intensively investigated due to its role as intermediate host for trematode blood flukes that cause the debilitating disease schistosomiasis in man and livestock. Owing to taxonomic ambiguities within Bulinus, attention has often focused upon species delineation and several molecular methods have recently been used for identification and characterization purposes. Inspection of compensatory base changes (CBCs) in the secondary structure of the nuclear ribosomal internal transcribed spacer (ITS) has been used to differentiate species in other genera, and here we present a study investigating the presence of CBCs between species in the species groups within Bulinus. CBCs were present within B. forskalii and B. globosus indicating that these widely distributed taxa might constitute cryptic species complexes. However, other currently recognized species could not be distinguished by CBC analysis. The putative secondary structure of the very long ITS2 sequence of the B. reticulatus species group had an additional helix (DIIa) between DII and DIII not seen in other species groups of Bulinus. The accumulation and inspection of further ITS2 sequences will no doubt reveal additional variation between Bulinus populations, and CBCs should be incorporated in future taxonomic work in this group.

Item Type: Article
Subjects: QU Biochemistry > Cells and Genetics > QU 350 Cellular structures
QX Parasitology > QX 15 Classification. Terminology
QX Parasitology > QX 45 Host-parasite relations
QX Parasitology > Insects. Other Parasites > QX 675 Mollusca
WC Communicable Diseases > Tropical and Parasitic Diseases > WC 810 Schistosomiasis
Faculty: Department: Biological Sciences > Department of Tropical Disease Biology
Digital Object Identifer (DOI):
Depositing User: Mary Creegan
Date Deposited: 15 Nov 2013 09:39
Last Modified: 02 Dec 2019 12:52


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