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Bulinus truncatus

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


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Journal ArticleDOI
TL;DR: The reproductive tract of B. truncatus was investigated histologically in order to study possible effects of castration upon the accessory sex glands and the abundance and location of the cell types were taken into account.
Abstract: The reproductive tract of B. truncatus was investigated histologically in order to study possible effects of castration upon the accessory sex glands. In the female part of the reproductive tract—subdivided into albumen gland, oviduct, muciparous gland, oothecal gland, uterus, vagina and bursa copulatrix—13 histochemically different secretory cell types were distinguished. The majority produce different types of (acid) mucopolysaccharides. The roles of the various parts of the female tract in the production of an egg mass were elucidated by comparing the histochemistry of the egg mass to that of the female tract; the abundance and location of the cell types were also taken into account for this purpose. The male part appeared to contain 12 histochemically different secretory cell types. These produce mainly (phospho lipoproteins together with some polysaccharides and neutral lipids. Castration causes an acceleration of the growth of the snails. The volumes of female (albumen gland) and male (prostate glan...

20 citations

Journal Article
TL;DR: The steroidal saponin-containing fraction from methanolic extract of Dracaena fragrans was tested for molluscicidal and ovicidal activities against Biomphalaria alexandrina and Bulinus truncatus and showed significant increase in total protein content & albumen, in aminotransferases and acetylcholinesterase activities.
Abstract: The steroidal saponin-containing fraction from methanolic extract of Dracaena fragrans (Family: Agavaceae) was tested for molluscicidal and ovicidal activities against Biomphalaria alexandrina and Bulinus truncatus, the snail vectors of Schistosoma mansoni and S. haematobium in Egypt, respectively. It was also tested for schistosemicidal activity in vitro on adult S. mansoni and against the free-living miracidia and cercariae of the parasite. The homogenated soft body of B. alexandrina was used to determine the effect of the saponin fraction on total protein, albumen, aminotransferase enzymes and acetylcholin esterase. The results showed that the saponin fraction had considerable molluscicidal activity; LC50 & LC90 were 2.7 ppm & 3.7 ppm for B. alexandrina and 2 ppm & 2.5 ppm for B. truncatus, respectively. Snail eggs did not hatch in concentration as low as half molluscicidal LC50 (1.35 ppm). The LC50 killed all miracidia and cercariae in 30 seconds and after 22 & 40 minutes at a very low concentration (0.165 ppm) respectively, and had in vitro lethal effect on adults with LC50 18.4 microg/ml 4 days post-exposure. The snail tissue homogenate showed significant increase in total protein content & albumen, in aminotransferases and acetylcholinesterase activities.

20 citations

Journal ArticleDOI
TL;DR: Schistosoma bovis from Morocco was used in infection experiments with several populations of Bulinus truncatus and the snails from Libya, Malawi, Morocco and Senegal were very compatible with the schistosome, and B. forskalii were refractory.
Abstract: Schistosoma bovis from Morocco was used in infection experiments with several populations of Bulinus truncatus. The snails from Libya, Malawi, Morocco and Senegal were very compatible with the schistosome since the infection rates were approximately 90%, the mortality was low, and a very high production of cercariae, approximately 1.2 million per 100 exposed snails, was observed. Only a very few B. truncatus (2n = 36) from Rhodesia became infected. B. permembranaceus and B. forskalii were refractory.

20 citations

Journal ArticleDOI
TL;DR: It is concluded that Chlorpyrifos and Profenophos may be helpful in schistosomiasis control as they interfere with the snails’ biology and their production of the infective stage (cercariae).

20 citations

Journal ArticleDOI
TL;DR: It is suggested that there may be population differences in the extent of environmental control over phally, analogous to that reported for sex determination, even under controlled laboratory conditions.
Abstract: The heritability of phally, a dichotomous trait defined by the functional state of the male reproductive tract, was measured in a laboratory population of the simultaneous hermaphrodite snail Bulinus truncatus by means of a breeding experiment and a selection experiment. Euphallic individuals develop a fully functional male and female tract and are capable of receiving and donating sperm. In aphallic individuals the male tract does not develop fully, preventing sperm donation. There was no evidence of a heritable component to phally in the breeding experiment, but the selection experiment demonstrated a slight heritable effect. In both experiments there was more variation in the observed proportion of euphallics than expected by chance alone and no evidence of line or family effects, implicating environmental determination of male outcrossing ability even under controlled laboratory conditions. Previous studies of populations of B. truncatus reported that the proportion of euphallics was under strong genetic control. We suggest that there may be population differences in the extent of environmental control over phally, analogous to that reported for sex determination.

19 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202112
20208
20198
20185
20178
20165