Bulinus truncatus

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

Impact of the photosensitizers copper and magnesium chlorophyllin on biological and biochemical parameters of Bulinus truncatus snail

Abstract: Bulinus truncatus snail is the intermediate host of Schistosoma haematobium, which causes serious damage to the urinary system of infected patients. To control it in its rapid interruption and/or elimination of the disease transmission would be efficient. Copper chlorophyllin (Cu-chl) and magnesium chlorophyllin (Mg-chl); two photosensitizers used in several biological applications, were bio-assayed against B. truncatus snails. Mg-chl proved to be more toxic to the snails than Cu-chl; their LC90 values were 516.7 and 668.9 ppm, respectively. The sub lethal concentrations of each photosensitizer significantly suppressed the fecundity (Mx) and reproductive rate (R0) of treated snails, which could be partially attributed to the recorded disturbances in their biochemical parameters. The reduction rates of R0 for snails treated with LC25 Mg-chl and Cu-chl were 83.5% and 50.8%, respectively. Moreover, these photosensitizers exerted marked histological changes in the hermaphrodite gland of treated snails where spermatogonia and oogonia in the gland acini were degenerated, while the connective tissue was disintegrated. Both Mg-chl and Cu-chl exhibited toxic effect on B. truncatus snail and interfered with the biological parameters of it that could negatively interrupt the transmission of S. haemeatobium. Therefore, both chemicals could be considered in the control program of this parasite being cheap and environmentally safe.

[Population dynamics and infestation of Bulinus truncatus and Bulinus forskalii by schistosomal larvae in the Sudan-Sahelian zone of Cameroon].

Abstract: The evolution of the population densities of Bulinus truncatus and Bulinus forskalii has been studied during 18 months in a number of sites of the Sudan-Sahelian zone of Cameroon, in relation to certain environmental factors. Only the altitude of the water in the sites has an influence on the density of the snails. The populations of B. truncatus present a greater proportion of young molluscs during the entire year, with the exception of the last months of the dry season. The population dynamics of B. forskalii varies depending on whether the environment is temporarily stagnant, temporarily running or stable. The proportions of B. truncatus and B. forskalii that emit cercariae of schistosomes are 1.2% and 0.8% respectively. Study of the adult worms obtained after infestation of the laboratory mammals show that B. truncatus emits cercariae of Schistosoma haematobium at the end of the dry season and at the beginning of the rainy season. We have not been able to identify precisely the cercariae emitted by B. forskalii, which raises the necessity of further systematic studies being carried out on the schistosomes of Cameroon.

Molluscicidal Effects of Talinum Triangulare On Bulinus Truncatus

Abstract: The molluscicidal effects of Talinum triangulare from two locations in Nigeria on Bulinus truncatus were studied in the laboratory Snails were exposed for 96h to different concentrations of ethanolic extract of the plant root from Nsukka in Enugu State and Erei in Cross River State, Nigeria Those in dechlorinated water served as control On coming in contact with the test medium, the snails reacted by speedily crawling out of the containers Exposure of snails to Talinum triangulare concentrations of less than 300ppm showed only ovicidal activity while varying numbers of those exposed to 300ppm died as the exposure time increased The control group recorded no effects Snail recovery was only observed in concentrations less than 300ppm The LC 50 of the plant root extract from Nsukka in Enugu State and Erei in Cross River State decreased (ranging from 505-251ppm) as exposure time increased The molluscicidal activities (LC 50 ) of the ethanolic plant root extracts from the two locations were not significantly different (p> 005) The ethanolic plant root extracts of T triangulare may be a potential molluscicide in schistosomiasis control Key words : Molluscicide , Talinium triangulare , Bulinus truncatus, Schistosomiasis

Effect of various foods on Biomphalaria alexandrina and Bulinus truncatus and their susceptibility to schistosome miracidia.

Abstract: The tested foods are tropical fish food (tetramine), rat food, blue green algae, dried lettuce leaves and a mixture of all these foods. The results indicated that feeding of B. alexandrina on a mixture of foods increased their growth and survival rates and their susceptibility to S. mansoni. Tetramine elevated the egg-laying capacity of snails compared to other tested foods. The hatchability of eggs of B. alexandrina fed on algae for a period of 16 weeks showed the highest rate followed by snails fed on a mixture of foods and then tetramine. B. truncatus maintained on a mixture of foods for 16 weeks, exhibited an increase in their growth, egg-laying, survival rates and recorded the highest infection rate with S. haematobium than other foods. Among the used foods, the hatchability of eggs of B. truncatus fed on tetramine for 16 weeks was the highest one.