Bulinus truncatus

About: Bulinus truncatus is a research topic. Over the lifetime, 414 publications have been published within this topic receiving 5640 citations.

Experimental studies on the suitability of aquatic snails as intermediate hosts for Paramphistomum cervi in Iraq.

Abstract: Three of the most common species of aquatic snails in Iraq were examined for their susceptibility to infection with Paramphistomum cervi. Bulinus truncatus was the only susceptible species. No development occurred in Physa acuta or Lymnaea lagotis euphratica. These findings and a previous field observation that infection of B. truncatus with amphistome larvae is not uncommon indicate that B. truncatus is an intermediate host of P. cervi in Iraq. Young snails of B. truncatus were more susceptible to infection than older ones.

The Parasitic Infection of the Freshwater Snails Collected in Central Iraq

Abstract: The parasitic infection of the Iraqi freshwater snails is rather poorly known. The few papers appeared dealing with this matter was mainly preliminary surveys for cercaria types identified to the family level. Waston and Najim (1956) studied bilharziasis in Iraq and wrote some observations on schistosome dermatitis. Shamsuddin and Al-Adhami (1968) commented on larval trematodes in two species of snails from Mosul, Iraq. Wajdi et al. (1979) examined the susceptibility of Iraqi fresh water snails to infection with Schistosoma haematobium and Schistosoma mansoni Egyptian strains at the seventies decade of the 20 century characterized with presence of millions of Egyptian workers in Iraq. Jaffer (1980) commented on larval trematodes in Iraqi snails providing figures, descriptions and measurements. Mohammad (1983) indicated natural infection of Bulinus truncatus collected in Babylon province with larval stages of an echinostome trematode species. Yacoub (1985) studied the epidemiology of Schistosoma haematobium infection in Basrah, southern Iraq. AlMayah (1990) in his search for helminthes in some aquatic birds, wrote some notes about swimmer itch in Basrah. Al-Mayah (1998) revealed presence of larval trematoda in some freshwater gastropods collected in Basra province, southern Iraq. Al-Ali (2002), Al-Mayah et al. (2005) and Al-Mayah and Awad (2005) studied the growth and development of Fasciola gigantica in the snail intermediate host Lymnaea auricularia. Al-Khuzaee (2008, 2009) studied the swimmer's itch in Al-Nagaf Al-Ashraf province. AlTaee et ISSN: 2319-7706 Volume 4 Number 3 (2015) pp. 47-55 http://www.ijcmas.com

Phylogeography of Bulinus truncatus (Audouin, 1827) (Gastropoda: Planorbidae) in Selected African Countries.

Abstract: The transmission of some schistosome parasites is dependent on the planorbid snail hosts. Bulinus truncatus is important in urinary schistosomiasis epidemiology in Africa. Hence, there is a need to define the snails’ phylogeography. This study assessed the population genetic structure of B. truncatus from Giza and Sharkia (Egypt), Barakat (Sudan) and Madziwa, Shamva District (Zimbabwe) using mitochondrial cytochrome oxidase subunit 1 gene (COI) and internal transcribed spacer 1 (ITS 1) markers. COI was sequenced from 94 B. truncatus samples including 38 (Egypt), 36 (Sudan) and 20 (Zimbabwe). However, only 51 ITS 1 sequences were identified from Egypt (28) and Sudan (23) (because of failure in either amplification or sequencing). The unique COI haplotypes of B. truncatus sequences observed were 6, 11, and 6 for Egypt, Sudan, and Zimbabwe, respectively. Also, 3 and 2 unique ITS 1 haplotypes were observed in sequences from Egypt and Sudan respectively. Mitochondrial DNA sequences from Sudan and Zimbabwe indicated high haplotype diversity with 0.768 and 0.784, respectively, while relatively low haplotype diversity was also observed for sequences from Egypt (0.334). The location of populations from Egypt and Sudan on the B. truncatus clade agrees with the location of both countries geographically. The clustering of the Zimbabwe sequences on different locations on the clade can be attributed to individuals with different genotypes within the population. No significant variation was observed within B. truncatus populations from Egypt and Sudan as indicated by the ITS 1 tree. This study investigated the genetic diversity of B. truncatus from Giza and Sharkia (Egypt), Barakat area (Sudan), and Madziwa (Zimbabwe), which is necessary for snail host surveillance in the study areas and also provided genomic data of this important snail species from the sampled countries.

Evolution and ecological correlates of uniparental and biparental reproduction in freshwater snails

Abstract: We review the spatial and temporal correlates of uniparental and biparental reproduction in three species of freshwater snails as they pertain to the ecological hypotheses for the maintenance of biparental sex. The biogeographic evidence from two species (Potamopyrgus antipodarum and Bulinus truncatus) presently supports the Red Queen hypothesis that biparental reproduction is selected as a way to reduce the risk to progeny of parasite attack. Uniparental reproduction in these species is associated with low levels of infection by parasites (castrating digenetic trematodes), suggesting that parthenogenesis or self-fertilization can replace cross-fertilization when the risk of infection is low. In addition, in B. truncatus, the timing of cross-fertilization coincides with the season in which parasite attack is highest. In a third species (Campeloma decisum), parthenogenetic reproduction is correlated with latitude and the presence of a non-castrating trematode that may prevent cross-fertilization; these patterns suggest that parthenogenesis has been selected as a mechanism to assure reproduction. We also discuss the taxonomic distribution of parthenogenesis in aquatic invertebrates, and suggest that brooding may be an exaptation for the evolution of parthenogenetic reproduction in these animals.