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Biomphalaria alexandrina

About: Biomphalaria alexandrina is a research topic. Over the lifetime, 413 publications have been published within this topic receiving 3781 citations.


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Journal ArticleDOI
TL;DR: In this paper, the authors investigated the toxic impact of Co-Cd-Fe/PbI2 nanomaterials on the adult freshwater snails (Biomphalaia alexandrina) and showed that exposure to this sublethal concentration caused abnormalities in hemocyte shapes and upregulated IL-2 level in soft tissue.
Abstract: Layered double hydroxide (LDH) nanomaterials have recently become immense research area as it is used widely in industries. So, it’s chance of their release into natural environment and risk assessment to nontarget aquatic invertebrate increasing. So, the present study aimed to synthesize and confirm the crystalline formation of Co-Cd-Fe LDHs and Co-Cd-Fe/PbI2 (LDH) and then to investigate the toxic impact of the two LDH on the adult freshwater snails (Biomphalaia alexandrina). Results showed that Co-Cd-Fe/PbI2 LDH has more toxic effect to adult Biomphalaria than Co-Cd-Fe LDHs (LC50 was 56.4 and 147.7 mg/L, 72 h of exposure, respectively). The effect of LC25 (117.1 mg/L) of Co-Cd-Fe LDHs exposure on the embryo showed suppression of embryonic development and induced embryo malformation. Also, it showed alterations in the tegmental architectures of the mantle-foot region of B. alexandrina snails as declared in scanning electron micrograph. Also, exposure to this sublethal concentration caused abnormalities in hemocyte shapes and upregulated IL-2 level in soft tissue. In addition, it decreased levels of nonenzymatic reduced glutathione (GSH), catalase (CAT), superoxide dismutase (SOD), caspase-3 activity, and total protein content in significant manner. Glutathione S-transferase (GST) activity was not affected by LDH exposure. It caused histopathological damages in both glands of snails and also caused a genotoxic effect in their cells. The results from the present study indicated that LDH has risk assessment on aquatic B. alexandrina snails and that it can be used as a biological indicator of water pollution with LDH.

10 citations

Journal ArticleDOI
TL;DR: The phytochemical analysis confirmed the presence of tannins, flavonoids, saponins, terpenoids, steroids, anthraquinones, alkaloids, carbohydrates, and coumarins in Biomphalaria alexandrina snails and showed that N. spina-christi and N. oleander had higher molluscicidal effect than others while C. papaya had higher amount of the total phenolic content.
Abstract: Schistosomiasis is a neglected tropical disease caused by blood flukes. Freshwater snails of genus Biomphalaria are the intermediate hosts of Schistosoma mansoni. The present study aimed to...

10 citations

Journal ArticleDOI
TL;DR: The present study indicated that the increase in levels of aminotransaminases, acid phosphatase and alkaline phosphatases enzymes in haemolymph and soft tissue of snails and the activity level of lactate dehydrogenase, hexokinase and pyruvatekinase was also significantly reduced in response to treatment.
Abstract: Profenophos is an organophosphorus pesticide which are used effectively against cotton insects and mites.The present work was carried out to evaluate the molluscicidal activity of pesticides (Profenophos) against Biomphalaria alexandrina snails. Also, the effect of sublethal concentrations of pesticide on the infection of B. alexandrina with Schistosoma mansoni and some enzymes of energy metabolism were studied. The results showed that the infection of B. alexandrina with schistosoma mansoni was greatly reduced after exposure to LC0, LC10, LC25 of pesticide and also, reduction in number of cercariae per snail during the patent period and in the period of cercarial shedding. The present study indicated that the increase in levels of aminotransaminases, acid phosphatase and alkaline phosphatases enzymes in haemolymph and soft tissue of snails and the activity level of lactate dehydrogenase, hexokinase and pyruvatekinase was also significantly reduced in response to treatment.

10 citations

01 Jan 2014
TL;DR: It is concluded that, Mirazid can be used as a promising molluscicide for B. alexandrina snails’ control.
Abstract: Sherin K. Sheir The growing awareness of the possible dangers from the use of molluscicides gives a great attention to the plant molluscicides for snail control. Mirazid was tested as a molluscicide against adult Biomphalaria alexandrina snails and a larvicide against S. mansoni larvae (miracidia and cercariae). LC50 and LC90 values were detected for both tests (19.19 and 41.26 mg/l, respectively). B. alexandrina, non-infected and infected with Schistosoma mansoni were exposed to 3 mg/l of Mirazid drug for 4 weeks compared to non-treated with Merazid and/or infected controls. Then the meracidea, cercariae, egg production, protein electrophoresis and DNA fragmentation analysis of B. alexandrina and organ histology were assessed. Mirazid treatment suppressed the growth rate by 11%, decreased the eggs/snail/week by 98 %, and delayed eggs hatchability to 13 days and complete cessation of cercarial shedding (100 %). Mirazid exhibited sever histological alterations at 4 week of exposure on hermaphrodite and digestive glands of infected and non-infected B. alexandrina snails. It also led to decrease in total protein intensity of the hermaphrodite-digestive glands in both treated and treated-infected snails as absence of the protein band 54.77 kDa. The previous two groups of snails also showed DNA damage in hermaphrodite-digestive glands. It is concluded that, Mirazid can be used as a promising molluscicide for B. alexandrina snails’ control.

10 citations

Journal ArticleDOI
TL;DR: It is shown that Biomphalaria alexandrina snails are sensitive to only bait formulations with low concentrations of molluscicides, and the effectiveness of these bait formulations was reduced after long storage periods (> 3 weeks).
Abstract: Exploration of methods of snail control indicated a need for a new method because many failures in control programmes are due to lack of contact between molluscicides and the target snail population. The incorporation of molluscicides inside food pellets that are attractive to and ingestible by the target snails is suggested. Different concentrations of alcoholic extracts of Ambrosia maritima, Cucumis prophetarum and Rhynchosia minima-molluscicides of plant origin-were compared with niclosamide (Bayluscide) which is a strong synthetic molluscicide. They were incorporated into attractive food pellets and the lethal doses were determined. The results showed that Biomphalaria alexandrina snails are sensitive to only bait formulations with low concentrations of molluscicides. Laboratory and semi-field trials were conducted to study the efficacy of the prepared bait formulations on Biomphalaria alexandrina snails. The stability of these bait formulations was studied and it was observed that their effectiveness was reduced after long storage periods (> 3 weeks). The results revealed that Ambrosia maritima was the most effective molluscicide.

9 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202110
202014
201914
201816
201711
201616