| modelling spatial distribution of snails transmitting parasitic worms with importance to human and animal health and analysis of distributional changes in relation to climate. | the environment, the on-going global climate change and the ecology of animal species determine the localisation of habitats and the geographical distribution of the various species in nature. the aim of this study was to explore the effects of such changes on snail species not only of interest to naturalists but also of importance to human and animal health. the spatial distribution of freshwater snail intermediate hosts involved in the transmission of schistosomiasis, fascioliasis and paramphi ... | 2014 | 24893011 |
| [preliminary evaluation of morbidity due to s. haematobium and s. mansoni in the area of the future adjarala dam in benin]. | the aim of this study was to provide a preliminary assessment of morbidity due to schistosomiasis in the area of the future adjarala dam in benin. we included 412 schoolchildren from five villages in the study. the mean age of the children was 9.4 +/- 2.3 years and the sex ratio (f/m) was 0.94. these children underwent parasitological examination. the children provided urine samples, which were examined by eye, filtered and tested for blood and protein. stool samples were examined using kato's t ... | 2016 | 11125338 |
| a mark-recapture method for ecological studies of schistosomiasis vector snail populations. | mark-recapture methods have been used only sporadically in studies of the population biology of the snail vectors of schistosomiasis, yet mark-recapture has potential advantages for obtaining estimates of absolute abundance and recruitment and loss rates for snail populations in the field. a case study is described that uses bailey's triple catch design to estimate these parameters for bulinus globosus and biomphalaria pfeifferi in a small river in zimbabwe. the assumptions inherent in the desig ... | 1988 | 3257077 |
| urinary schistosomiasis among preschool children in malengachanzi, nkhotakota district, malawi: prevalence and risk factors. | this study was designed to determine the prevalence of and risk factors for schistosomiasis among a group of preschool children in malawi. schistosomiasis burden among preschoolers in malawi is not well documented in the literature. | 2016 | 27217911 |
| effects of endosulfan on predator-prey interactions between catfish and schistosoma host snails. | the effect of the pesticide endosulfan on predator-prey interactions between catfish and schistosoma host snails was assessed in static tank experiments. hybrid catfish (clarias gariepinus × c. ngamensis) and bulinus globosus were subjected to various endosulfan concentrations including an untreated control. the 48- and 96-h lc50 values for catfish were 1.0 and <0.5 µg/l, respectively, whereas the 48- and 96-h lc50 values for snails were 1137 and 810 µg/l. to assess sublethal effects on the feed ... | 2016 | 27033099 |
| schistosomiasis outbreak investigation, empandeni ward, mangwe district, matabeleland south province, june 2012; a case control study. | on 20th of june 2012, 31 pupils from kwite primary school reported to the local clinic complaining of passing bloody urine. a study was conducted to identify factors, the etiology and risks of contracting the disease. | 2014 | 25204324 |
| molecular data suggest that microsporidian parasites in freshwater snails are diverse. | microsporidian parasites infect almost all invertebrate and vertebrate hosts and have significant effects on individual and population fitness. phylogenetic analysis demonstrates that the phylum is highly divergent and that some lineages show strong associations with host taxa. we here examine the diversity and distribution of parasites in gastropod molluscs to test for host-parasite co-association. 16 populations representing 10 species of freshwater snails were screened using microsporidian sp ... | 2005 | 16023122 |
| survival rates of bulinus globosus during aestivation. | | 1990 | 2222032 |
| cockroach allatostatin-like immunoreactivity in the central nervous system of the freshwater snails bulinus globosus (planorbidae) and stagnicola elodes (lymnaeidae). | allatostatin-like immunoreactivity was demonstrated in the central nervous system (cns) neurons of the freshwater pulmonate snails bulinus globosus (planorbidae) and stagnicola elodes (lymnaeidae). immunopositive neurons were localized using a monoclonal antibody highly specific to allatostatin i (apsgaqrlygfgl-amide) from the cockroach diploptera punctata. all cns ganglia in both snail species contained immunopositive neurons. the pedal ganglia showed large numbers (80-100) of neurons in bulinu ... | 1997 | 9169120 |
| urogenital schistosomiasis transmission on unguja island, zanzibar: characterisation of persistent hot-spots. | elimination of urogenital schistosomiasis transmission is a priority for the zanzibar ministry of health. preventative chemotherapy together with additional control interventions have successfully alleviated much of the disease burden. however, a persistently high schistosoma haematobium prevalence is found in certain areas. our aim was to characterise and evaluate these persistent "hot-spots" of transmission and reinfection in comparison with low-prevalence areas, to support the intervention pl ... | 2016 | 27986092 |
| modelling the spatial and seasonal distribution of suitable habitats of schistosomiasis intermediate host snails using maxent in ndumo area, kwazulu-natal province, south africa. | schistosomiasis is a snail-borne disease endemic in sub-saharan africa transmitted by freshwater snails. the distribution of schistosomiasis coincides with that of the intermediate hosts as determined by climatic and environmental factors. the aim of this paper was to model the spatial and seasonal distribution of suitable habitats for bulinus globosus and biomphalaria pfeifferi snail species (intermediate hosts for schistosoma haematobium and schistosoma mansoni, respectively) in the ndumo area ... | 2016 | 27814746 |
| detection of genetic diversity within snail intermediate hosts of the genus bulinus by using random amplified polymorphic dna markers (rapds). | a polymerase chain reaction-based polymorphic assay procedure (rapd) was used to study the genetic diversity of intermediate host snails within the genus bulinus. genetic differentiation was detected between two closely related species: bulinus globosus and bulinus umbilicatus. evidence is presented demonstrating the potential of rapd markers for differentiating populations of b. forskalii from different countries (cameroon, equatorial guinea and ivory coast) or from the same country (cameroon). ... | 1993 | 8147277 |
| a study of the sugar chemoreception niches of two bulinid snail hosts of schistosomiasis. | components of the sugar chemoreception niches of two host snails of urinary schistosomiasis, namely bulinus globosus (morelet) and bulinus rohlfsi (clessin), were measured by using a buccal mass olfactometer. among the polysaccharides tested, amylose was found to be the strongest phagostimulant for adults and juveniles of both snail species. other phagostimulants identified were maltose and xylose for b. rohlfsi and maltotriose for b. globosus. the a(1-4)-glucosidic linkage and the presence of g ... | 1992 | 1417210 |
| analysis of mating systems in the schistosome-vector hermaphrodite snail bulinus globosus by dna fingerprinting. | bulinus globosus, one of the intermediate hosts for schistosoma, is a hermaphrodite freshwater snail. multilocus dna fingerprinting was applied in order to investigate the mating system of this facultatively self-fertilizing species. by analysing dna fingerprints of eight broods, we have shown that selfed and outcrossed individuals could be unambiguously distinguished by comparison with their parent fingerprints. first, selfed offspring patterns shared a higher number of bands with their mother ... | 1992 | 1548143 |