Bulinus truncatus

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

A study on biological control of six fresh water snails of medical and veterinary importance.

Abstract: This study evaluated the molluscicidal effect of Commiphora mnolmol oil extract (Myrrh), on control of six fresh water snails (Lymnaea natalensis, Bulinus truncatus, Biomphalaria alexandrina, Physa acuta, Melania tuberculata and Cleopatra bulimoides). Also, the extract effect on the egg masses of L. natalensis, B. truncatus, B. alexandrina and Ph. acuta was evaluated. Snails and egg masses were exposed at 16-20 degrees C to various concentrations (conc.). LD50 after 24 hours expo-sure were 264/132, 283/195, 230/252, 200/224, 241/246 & 241/246 ppm for young/adult of L. natalensis, B. truncatus, B. alexandrina, Ph. acuta, M. tuberculata and C. bulimnoides respectively. LDtoo after 24 hours exposure were 400/400 for L. natalensis, B. truncatus, B. alexandrina, M. tuberculata and C. bulimoides, and 300/300 for Ph. acuta. Also, complete mortality (100%) was achieved for the egg masses of L. natalensis, B. truncatus, B. alexandrina and Ph. acuta at concentrations of 300, 200, 300 & 400 ppm respectively. Lower concentrations gave the same results after longer exposure. LD100 of C. molmol oil extract (Myrrh) had a rapid lethal effect on the six snail species and their egg masses in high conc. of 300 & 400 ppm. Commiphora molmol is a promising plant to be included with the candidate plant molluscicides. The oil extract of this plant showed a remarkable molluscicidal activity against used snail species.

Effect of Artemether on Infectivity of Schistosoma Haematobium Larval Stages to Bulinus Truncatus Snails and to Hamster

Abstract: The effect of sublethal concentrations of the antihelminthic plant derivative, dihydro- artemisinin methyl ether (Artemether) on the infectivity of the larval stages of Schistosoma haematobium to Bulinus truncatus and to hamster (Mesocricetus auratus) and certain physiological parameters of B. truncatus snails was studied. The results obtained showed infectivity of B. truncatus to infection with S. haematobium miracidia was greatly reduced by exposure to LC0, LC10, LC25 of Artemether and also a reduction in the infectivity of the Schistosome cercariae shed from infected B. truncatus post exposure to sublethal concentrations of Artemether. The present results showed viable Bilharzial egg deposition, with related granulomas of chronic inflammatory cellular collection having a portal location in the liver of hamster infected with S. haematobium cercariae. The results obtained showed also that the glucose level in haemolymph of exposed snails was elevated while glycogen content in the soft tissues of the snails was significantly reduced. Sublethal concentrations of Artemether had strong In vivo and In vitro inhibitory effects on acetylcholinesterase activity of B. truncatus.

Effect of some algal species on the snail intermediate hosts of schistosomiasis in egypti. survival, fecundity and net reproductive rates

Abstract: Planktonic samples were collected from two habitats in Giza Governorate, Kafr Hakem (+ snails) and Sadek canals (- snails). Oscillatoria accuminata and Lyngbya perelegans were collected from the first location, while Phormidium valderianum, Spirogyra sp and Lyngbya perelegans were separated from the second one. Nostoc muscorum was obtained from Theodor Bilharz Research Institute (TBRI) and used in some experiments as control because it is non toxic. The effect of the previously mentioned algal species on Biomphalaria alexandrina and Bulinus truncatus snails, the intermediate hosts of schistosomiasis in Egypt, was studied. Investigations were carried out on the survivorship (Lx), fecundity (Mx) and reproduction (R0) of the snails. The obtained results indicate that O. accuminata, Spirogyra sp and L. perelegans were non toxic, while P. valderianum was toxic to the two snail species (sublethal concentration LC0 was used in the experiments). Concerning the survivorship, both snail species fed on O. accuminata had a higher survival rate than snails fed on other algal species or lettuce. While low survival rate was recorded in both snail species fed on Spirogyra sp. Fecundity of snails fed on lettuce (control) showed the highest value, followed by P. valderianum and L. perelegans, while the lower fecundity value was recorded in snails fed on O. accuminata. Concerning the net reproductive rate, snails nourished on lettuce recorded the highest value, while those fed on L. perelegans showed the lowest one. Chromatographic analysis of P. valderianum extract (using GC/MS) revealed the presence of toxic and molluscicidaly active components.

The molluscicidal properties of some Bayluscide homologues.

Abstract: The molluscicidal properties of 5-nitro- and 3-nitro2',4'-dichloro salicylanilides and their mixture 5.5 : 1 were investigated against the intermediate hosts of schistosomes Bulinus truncatus and Biomphalaria alexandrina. Unlike Bayluscide, the activity of the new mulluscicides is not affected by strong sun radiation or by acidic pH. Their activity is resistant to storage, river-bed mud and lower temperature.