| biological control of snail hosts transmitting schistosomiasis by the water bug, sphaerodema urinator. | the water bug, sphaerodema urinator (hemiptera : belostomatidae), shares the same habitat of the freshwater snails in ponds, lakes, and streams. studies conducted in lakes show that fish and crayfish predators play an important role in determining the abundance of freshwater snails. in contrast, shallow ponds and marches often lack fish and crayfish but have abundant insect predators. this study has been carried out to evaluate the predatory potential of s. urinator adult on two freshwater snail ... | 2017 | 28204958 |
| prevalence of schistosomiasis among patients attending qena general hospital over the years 2011 and 2012. | schistosomiasis is a public health problem in egypt. to detect the prevalence of schistosomiasis in qena governorate, 1601 urine and stool samples of patients attending qena general hospital were examined of whom 1601 patients had urinary symptoms and 893 patients had dysentery and bloody stool. sheets were filled out on each patient. also, a total of 7590 bulinus truncatus and biomphalaria alexandrina snails were collected from water bodies in qena governorate. the overall prevalence of s. haem ... | 2014 | 25597163 |
| potential use of biomphalaria alexandrina snail antigens for serodiagnosis of schistosomiasis mansoni by immunoblot analysis. | the aim of this study was to evaluate the possible use of biomphalaria alexandrina snail antigens in diagnosis of schistosomiasis mansoni using enzyme linked immunolectrotransfere blot (eitb). | 2013 | 23682262 |
| habitat characteristics for different freshwater snail species as determined biologically through macroinvertebrate information. | macro-invertebrates including freshwater snails collected from 643 sites over 8 successive seasons among the river nile, branches, main canals and certain drains in eight egyptian governorates. thirteen snail species and one bivalve species were identified. the most distributed were lanistus carinatus and physa acuta while the most abundant were cleopatra bulimoides and physa acuta during the whole study. the sites that harbored each snail species in all the examined water-courses were grouped s ... | 2011 | 22435158 |
| helobdella nilae and alboglossiphonia conjugata leeches as biological agents for snails control. | the efficacy of leeches, as biological agents, in control of snail intermediate hosts of schistosomiasis (bulinus truncatus, biomphalaria alexandrina) and fascioliasis (lymnaea natalensis) as well as their effect on the non-target snails physa acuta, melanioides tuberculata and cleopatra bulimoides was evaluated. two glossiphoniid snail leeches, helobdella nilae and alboglossiphonia conjugata were used. they destroyed egg masses and young snails more rapidly than adult ones. h. nilae showed a st ... | 2009 | 19530628 |
| a study on biological control of six fresh water snails of medical and veterinary importance. | 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 264/1 ... | 2009 | 19530615 |
| laboratory assessment of the molluscicidal activity of commiphora molmol (myrrh) on biomphalaria alexandrina, bulinus truncatus and lymnaea cailliaudi. | the molluscicidal properties of the oil extract of commiphora molmol (myrrh) were tested against egyptian snail species: biomphalaria alexandrina, bulinus truncatus and limnaea cailliaudi. the impact of the extract on the egg cluches of b. alexandrina and l. cailliaudi was also evaluated. snails and their eggs were exposed for 24 and 48 hr at 22-26 degrees c to various concentrations of the extract. the results showed different susceptibilities b. alexandrina showed higher ld50 and ld90 (155, 19 ... | 2001 | 11775095 |
| succinate-dcpip and nadh-fumarate oxidoreductases in fresh water snails susceptible and non susceptible to schistosoma infection. | the activities of succinate-dcpip oxidoreductase (so) and nadh-fumarate oxidoreductase (fr) were determined in tissue homogenate of biomphalaria alexandrina and bulinus truncatus, the snail vectors of schistosomiasia. a parallel study was done on lymnea truncatula snails which are not susceptible to schistosoma infection. the michaelis constant (km) and maximum velocities (vmax) for fumarate reduction and succinate oxidation by the tissue homogenates from the three species were determined. the r ... | 1992 | 1571942 |
| the influence of temperature, darkness, and starvation on growth and survival of helisoma duryi, biomphalaria alexandrina and bulinus truncatus. | the influence of 10 degrees, 18 degrees, 26 degrees, 28 degrees and 33 degrees c, different periods of complete darkness and starvation on growth and survival of h. duryi, b. alexandrina and b. truncatus were studied. the optimum temperature for the growth and survival was about 26 degrees c. survivorship and growth rates decreased proportionately according to starvation period. however, darkness had no significant effect on the growth of b. truncatus and h. duryi. under the chosen experimental ... | 1979 | 122361 |
| mollutox and bayer 73 as molluscicides against bulinus truncatus and biomphalaria alexandrina. | | 1975 | 1235499 |
| effect of certain insecticides in the control of the fresh water snails, biomphalaria alexandrina and bulinus truncatus. | | 1975 | 67018 |
| infection with schistosome parasites in snails leads to increased predation by prawns: implications for human schistosomiasis control. | schistosomiasis - a parasitic disease that affects over 200 million people across the globe - is primarily transmitted between human definitive hosts and snail intermediate hosts. to reduce schistosomiasis transmission, some have advocated disrupting the schistosome life cycle through biological control of snails, achieved by boosting the abundance of snails' natural predators. but little is known about the effect of parasitic infection on predator-prey interactions, especially in the case of sc ... | 2015 | 26677260 |
| the molluscicidal activity of coumarins from ethulia conyzoides and of dicumarol. | the molluscicidal principles of ethulia conyzoides were identified as ethuliacoumarin a (1) and isoethuliacoumarin a (2). ethuliacoumarin a possessed an lc90 between 19 and 23.5 ppm depending on the age of the snail against biomphalaria glabrata, and between 12 and 15 ppm against bulinus truncatus. in addition, ethuliacoumarin a was found to be cercaricidal at 25 ppm and ovicidal. ethuliacoumarin has the structural requirements considered essential for anticoagulant activity. consequently the an ... | 1992 | 1438593 |
| morphology of neurosecretory cells in basommatophoran snails homologous with egg-laying and growth hormone-producing cells of lymnaea stagnalis. | in a light and electron microscope study, neurosecretory cells morphologically homologous with the egg-laying hormone-producing caudodorsal cells (cdc) and growth hormone-producing dorsal cells (dc, light green cells) of the freshwater basommatophoran snail lymnaea stagnalis have been found in five genera (seven species) of basommatophora, viz. in lymnaea palustris and lymnaea ovata, in planorbis planorbis and planorbis vortex, in planorbarius corneus, in bulinus truncatus, and in biomphalaria g ... | 1987 | 3623071 |
| specificity of ovulation hormones of some basommatophoran species studied by means of iso- and heterospecific injections. | isospecific injections of intercerebral commissure (com) extracts of l. stagnalis, l. palustris, and l. ovata (lymnaeidae) and of extracts of com/mediodorsal bodies complexes (com/db) of bulinus truncatus (bulinidae) and biomphalaria glabrata (planorbidae) induced oviposition in a high percentage of the experimental snails. positive results of heterospecific injections between the first three species indicated a likely structural similarity of the ovulation hormones within the genus lymnaea. the ... | 1983 | 6685080 |
| types of trematodes infecting freshwater snails found in irrigation canals in the east nile locality, khartoum, sudan. | the planorbid freshwater snails of the two genera, biomphalaria and bulinus -have been vigorously studied due to the role they play as intermediate hosts of schistosomiasis. in sudan specifically, most studies have focused on the chemical and ecological control of the two genera, but few studies have looked at their biological control. this study explored the coexistence of other species of freshwater snails and the two genera along with their trematode infections in relation to a number of envi ... | 2016 | 26915911 |
| the spatial and seasonal distribution of bulinus truncatus, bulinus forskalii and biomphalaria pfeifferi, the intermediate host snails of schistosomiasis, in n'djamena, chad. | there is a paucity of epidemiological and malacological data pertaining to schistosomiasis in chad. in view of a recently articulated elimination agenda, a deeper understanding of the spatio-temporal distribution of schistosomiasis intermediate host snails is pivotal. we conducted cross-sectional malacological surveys during the dry season (april/may 2013) and after the short rainy season (october 2013) in n'djamena, the capital of chad. snails were identified at the genus and species level usin ... | 2014 | 25545929 |
| investigations of molluscicidal activity of certain sudanese plants used in folk-medicine. part iv*. | 50 plants indigenous to the sudan and of common use in sudanese folk-medicine, were screened for their molluscicidal activity, using two local snail vectors, bulinus truncatus and biomphalaria pfeifferi. at different concentrations 31 (62%) of these plant samples were found to be lethal to either one or both of the snail species. 28 (56%) proved to be lethal to biomphalaria pfeifferi, 22 (44%) gave 100% mortality to bulinus truncatus; while 19 (38%) killed both snail hosts (table i). the seven m ... | 1984 | 17340255 |
| molluscicidal properties of acacia nilotica. | the acetone, alcohol and aqueous extracts of fruits of acacia nilotica (l) willd. ex del. (mimosaceae) showed molluscicidal activity against bulinus truncatus and biomphalaria pfeifferi, the two snail species which transmit schistosomiasis in the sudan (s. haematobium and s. mansonii). tan, a new vegetable molluscicide prepared from the aqueous extract of the fruits of a. nilotica was produced on a pilot scale by using the spray drying procedure. due to the high content of tannins in the powder ... | 1982 | 17396969 |
| schistosomiasis screening of travelers to corsica, france. | | 2016 | 26691533 |
| schistosomiasis screening of travelers to corsica, france. | | 2016 | 26691318 |
| retracted: glyphosate herbicide induces genotoxic effect and physiological disturbances in bulinus truncatus snails. | herbicides are being used in agriculture for controlling noxious weed. glyphosate is a herbicide that is widely applied to cereal crops in egypt and is used in controlling a very broad spectrum of weeds. the present study was designed to investigate the response of the snail bulinus truncatus as a bioindicator for physiological and molecular aspects of b. truncatus snails after exposure to sublethal concentrations of glyphosate for two weeks. in treating snails, glucose concentration (gl) in the ... | 2015 | 26267049 |
| trematode-associated morbidity and mortality of tadpoles in israel. | amphibians stand at the forefront of the global biodiversity crisis. the causes of their decline are diverse and include a rise in amphibian malformations due to various factors, especially trematode infection. however, linking amphibian mortality and morbidity with trematode infection has proven to be challenging due to the complex life cycle of the trematodes and the fact that trematodes are nonfastidious in their choice of definitive hosts. in israel, the decline in local amphibian population ... | 2014 | 25098342 |
| [comparative study of schistosomiasis transmission (urinary and intestinal forms) at 10 sites in burkina faso (in sub-saharan africa)]. | despite great progress in schistosomiasis control over the past decade in burkina faso, this disease remains a public health problem. this study analyzes parasitologic data from investigations of schistosoma haematobium, s. mansoni, and mollusks. the prevalence rate of s. haematobium varies from 3.3% to 50.4%; that for s. mansoni (tested only in the western part of the country) from 3.3% to 39.1%. prevalence rates are higher in school-aged boys than girls, but the reverse is true among adults. s ... | 2016 | 23174311 |
| strong genetic structure in cameroonian populations of bulinus truncatus (gastropoda: planorbidae), intermediate host of schistosoma haematobium. | in order to evaluate the snail host contribution on the variability of mollusk/schistosome compatibility, the genetic structure of seven cameroonian populations of the schistosome vector, bulinus truncatus, was studied using four variable microsatellite loci. a substantial polymorphism mainly distributed among populations was observed. no heterozygous genotype was scored, confirming the high level of selfing rate occurring in b. truncatus populations. contemporaneous samples were highly and sign ... | 2010 | 21075219 |
| molecular approaches to the identification of bulinus species in south-west nigeria and observations on natural snail infections with schistosomes. | the current study considers the distribution of a small sample of 138 bulinus snails, across 28 localities within eight nigerian states. snails were identified using a combination of molecular methods involving both dna sequencing of a partial cytochrome oxidase subunit 1 (cox1) fragment and restriction profiles obtained from ribosomal internal transcribed spacer (its) amplicons. the results showed that the majority of bulinus samples tested belonged to the species bulinus truncatus while only t ... | 2010 | 20854706 |
| bidirectional introgressive hybridization between a cattle and human schistosome species. | schistosomiasis is a disease of great medical and veterinary importance in tropical and subtropical regions, caused by parasitic flatworms of the genus schistosoma (subclass digenea). following major water development schemes in the 1980s, schistosomiasis has become an important parasitic disease of children living in the senegal river basin (srb). during molecular parasitological surveys, nuclear and mitochondrial markers revealed unexpected natural interactions between a bovine and human schis ... | 2009 | 19730700 |
| plagiorchis elegans (trematoda) and incompatible snail hosts: implications for snail life history traits and biocontrol of human schistosomiasis. | we examined the effect of plagiorchis elegans on egg production and survival on bulinus truncatus and helisoma trivolvis trivolvis. both species are incompatible hosts for p. elegans. helisoma t. trivolvis occurs sympatrically with p. elegans; b. truncatus does not. overall, p. elegans had no effect on survivorship or egg production in h. t. trivolvis or on the survivorship of b. truncatus. its effect on egg production in b. truncatus was transitory; egg production was reduced by 50% for 5 wk fo ... | 2009 | 19566345 |
| habitats of bulinus truncatus and planorbarius metidjensis, the intermediate hosts of urinary schistosomosis, under a semiarid or an arid climate. | since bulinus truncatus and planorbarius metidjensis are the intermediate hosts of schistosoma haematobium in southwestern morocco, five rivers were investigated to identify sites colonized by either of both species and determine the characteristics of their habitats via the study of 12 physicochemical parameters in running water. p. metidjensis was observed in the upper valleys of three rivers, whereas b. truncatus was found in sites of lower altitude. a component analysis demonstrated that alt ... | 2007 | 17340142 |
| molluscicidal effect of three monoterpenes oils on schistosomiasis and fascioliasis vector snails in egypt. | thymol, linalool and eugenol showed considerable molluscicidal effect against biomphalaria alexandrina, bulinus truncatus and lymnneae natalensis. the thymol was the potent one at least lc50 and lc90) followed by euganol then linalool. l. natalensis were more sensitive to these compounds followed by b. truncatus and then b. alexandrina. the lc50 & lc90) of thymol were 22 and 34 ppm against b. alexaldrina, 20 and 30 ppm for b. truncatuts and 18 and 29 ppm for l. nalalensis. these values were high ... | 2006 | 16927871 |
| molluscicidal activities of aqueous extract of the sea anemone parasicyonis actinostoloides against vector snails bulinus truncatus and lymnaea natalensis. | the aqueous extract of the sea anemone parasicyonis actinostoloides showed molluscicidal effect against vector snails of schistosoma hacematobium and fasciola gigantica after 24 hours of exposure. lc50) and lc90 values for p. actinostoloides were 40 & 78.6 ppm for b. runcatus and 46.6 & 86.5 ppm for l. natalensis respectively. the effect of continuously exposure of b. truncatits and l. naltlensis to sublethal aqueous extract concentrations (lc0, lc10 & lc25) on survival rate, egg production and ... | 2006 | 16927866 |
| docking studies of benzylidene anabaseine interactions with α7 nicotinic acetylcholine receptor (nachr) and acetylcholine binding proteins (achbps): application to the design of related α7 selective ligands. | achbps isolated from lymnaea stagnalis (ls), aplysia californica (ac) and bulinus truncatus (bt) have been extensively used as structural prototypes to understand the molecular mechanisms that underlie ligand-interactions with nachrs [1]. here, we describe docking studies on interactions of benzylidene anabaseine analogs with achbps and α7 nachr. results reveal that docking of these compounds using glide software accurately reproduces experimentally-observed binding modes of dmxba and of its act ... | 2011 | 21986237 |
| population dynamics of chaetogaster limnaei (oligochaeta: naididae) in the field populations of freshwater snails and its implications as a potential regulator of trematode larvae community. | the objectives of this work were to study (1) the population dynamics of chaetogaster limnaei in the field populations of freshwater snails and the implications for the species as a potential regulator of the trematode larvae community and (2) prevalence and intensity of c. limnaei in relation to host species, host size, and season. this study was conducted at al-salam canal and al-abtal village (new cultivated area in north sinai). the samples were collected from march 2004 to february 2005. th ... | 2007 | 17252272 |
| molluscicidal activity against bulinus truncatus of croton campestris. | the bark of croton campestris provided three furano-clerodane named, respectively, velamone, velamolone acetate and velamolone. fractions containing these diterpenoids were investigated for their molluscicidal activity against bulinus truncatus, one of the aquatic snail vectors of schistosomiasis. a dichloromethanic extract of root barks, rich in furano-clerodane and molluscicidal at 20ppm was promising as natural molluscicide. enriched fraction with velamone gave 80% mortality from 25ppm, while ... | 2006 | 16793217 |
| two glutathione s-transferase isoenzymes purified from bulinus truncatus (gastropoda: planorbidae). | we purified and characterized two major glutathione s-transferase isoenzymes (gst2 and gst3) from snail bulinus truncatus (mollusca, gastropoda, planorbidae) tissue. the km with respect to 1-chloro-2, 4-dinitrobenzene (cdnb) for both isoenzymes was increased as the ph decreased. km of both isoenzymes with respect to glutathione (gsh) doubled when the ph was increased from 6.0 to 6.5. acid inactivated gst2 and gst3 and the two enzymes were almost inactive at ph 3.5. however, they retain the full ... | 2006 | 16311050 |
| crystal structure of acetylcholine-binding protein from bulinus truncatus reveals the conserved structural scaffold and sites of variation in nicotinic acetylcholine receptors. | the crystal structure of acetylcholine-binding protein (achbp) from the mollusk lymnaea stagnalis is the established model for the ligand binding domains of the ligand-gated ion channel family, which includes nicotinic acetylcholine, 5-hydroxytryptamine (5-ht3), gamma-aminobutyric acid (gaba), types a and c, and glycine receptors. here we present the crystal structure of a remote homolog, achbp from bulinus truncatus, which reveals both the conserved structural scaffold and the sites of variatio ... | 2005 | 15899893 |
| a phallus for free? quantitative genetics of sexual trade-offs in the snail bulinus truncatus. | resource allocation is thought to play a key role in the coexistence of different sexual morphs within hermaphroditic species. indeed, most models assume that sexual functions are subject to a balance between reproductive advantage and energetic cost. various types of cost (e.g. organ construction, maintenance and utilization) and levels of trade-off (physiological and genetic) may be considered. we here examine physiological and genetic costs of phallus construction and maintenance in bulinus t ... | 2003 | 14635876 |
| [evaluation of antifungal and mollusuicidial activities of moroccan zizyphus lotus (l.) desf]. | zizyphus lotus (l.) desf. is one of the traditional drugs commonly used in folk medicine in morocco. extracts obtained from the successive exhaustion in petroleum ether, chloroform, ethyl acetate and methanol were in vitro found active either against nine pathogenic fungi and bulinus truncatus, the intermediate host and vector of transmission of unitary schistosomiasis in morocco. particularly, the chloroform extract appears the most interesting in antifungal tests at lowest concentrations becau ... | 2002 | 12514508 |
| molluscicidal and radical scavenging activity of quinones from the root bark of caryopteris x clandonensis. | in the search for new molluscicidal natural products, the activity of the chloroform extract of the root barks of caryopteris x clandonensis was tested. the lc(100) was <5 ppm. the fractionation and purification of the extract afforded 15-deoxyfuerstione, fuerstione and alpha-caryopterone as the main compounds. these compounds were tested against the snail bulinus truncatus, an intermediate host snail of a schistosomiasis parasite and showed strong molluscicidal activity with lc(100)<4 ppm. in a ... | 2002 | 12385879 |
| ontogenetic reaction norm for binary traits: the timing of phallus development in the snail bulinus truncatus. | the ontogenetic trajectory of plastic binary traits may provide valuable insights into their evolutionary rate of change. in this paper, the timing of the plastic response of a temperature-dependent sexual polymorphism, aphally, is investigated in the freshwater snail bulinus truncatus. aphally is defined as the loss of the male copulatory organ in otherwise hermaphroditic animals. individuals from two inbred lines were switched at various times during their early development between 25 and 30 d ... | 2002 | 11986869 |
| microsatellite size homoplasy, sscp, and population structure: a case study in the freshwater snail bulinus truncatus. | the extent of microsatellite size homoplasy, as well as its effect on several population genetics statistics, was investigated in natural populations using the single-strand conformation polymorphism (sscp) method. the analysis was conducted using 240 individuals from 13 populations of the freshwater snail bulinus truncatus at a gt(n)ct(m) compound microsatellite locus. we showed that sscp can be used to uncover, at least partly, size homoplasy in the core sequence of this category of loci. eigh ... | 2000 | 11110909 |
| quantitative genetics of sexual plasticity: the environmental threshold model and genotype-by-environment interaction for phallus development in the snail bulinus truncatus. | sexual polymorphisms are model systems for analyzing the evolution of reproductive strategies. however, their plasticity and other binary traits have rarely been studied, with respect to environmental variables. a possible reason is that, although threshold models offer an adequate quantitative genetics framework for binary traits in a single environment, analyzing their plasticity requires more refined empirical and theoretical approaches. the statistical framework proposed here, based on the e ... | 2000 | 11108589 |
| laboratory evaluation of molluscicidal activity of extracts from cotula cinerea (l) and quercus lusitania var. infectoria galls (oliv.). | in this work, we have studied the molluscicidal activity of different extracts obtained from cotula cinerea and quercus lusitania var. infectoria galls. the hydroalcoholic extract of cotula cinerea, acetonic extract and gallotanin of quercus infectoria galls have presented high activity against bulinus truncatus. the hydroalcoholic extract of cotula cinerea was fractionated by chromatography on silica gel column. we have isolated two very active fractions at concentrations respectively of 52.5 a ... | 1998 | 9872015 |
| population dynamics inferred from temporal variation at microsatellite loci in the selfing snail bulinus truncatus. | we analyzed short-term forces acting on the genetics of subdivided populations based on a temporal survey of the microsatellite variability in the hermaphrodite freshwater snail bulinus truncatus. this species inhabits temporary habitats, has a short generation time and exhibits variable rates of selfing. we studied the variability over three sampling dates in 12 sahelian populations (1161 individuals). classical genetic parameters (estimators of ho, he, f, selfing rate and fst) showed limited c ... | 1997 | 9215901 |
| a longifurcate distome cercaria from bulinus truncatus snails in the jordan valley, jordan. | bulinus truncatus snails collected from water bodies of the south shuna region, north of the dead sea, were found infected with a pharyngeal longifurcate distome cercaria. this new form of cercaria is named cercaria bulini i. it has three pairs of penetration glands, 12 pairs of flame cells, and lacks the intestinal cecae. this cercaria is an active swimmer and develops within an elongated sporocyst. other details on the morphology, behavior, and development of c. bulini i are presented. | 2003 | 9095414 |
| the evolution of phally polymorphism in bulinus truncatus (gastropoda, planorbidae): the cost of male function analysed through life-history traits and sex allocation. | in the hermaphrodite freshwater snail bulinus truncatus, two sexual morphs, euphallic (regular hermaphrodites) and aphallic individuals without a male copulatory organ, co-occur at various ratios in natural populations. both aphallic and euphallic individuals can reproduce by selfing, but when outcrossing aphallic individuals can only play the female role. a comparison of life-history traits and sex allocation in these two forms provides the opportunity to investigate the evolution and maintenan ... | 1996 | 28307445 |
| neurosecretion in the basommatophoran snail bulinus truncatus (gastropoda, pulmonata). | the neurosecretory system of the freshwater snail bulinus truncatus was investigated. with the alcian blue-alcian yellow (ab/ay) staining method at least 10 different types of neurosecretory cells (nsc) were distinguished in the ganglia of the central nervous system. the differences in staining properties of the nsc - with ab/ay the cells take on different shades of green and yellow - are borne out at the ultrastructural level: the nsc types contain different types of neurosecretory elementary g ... | 1977 | 837395 |
| first record of bulinus truncatus (audouin) in jordan. | | 1976 | 971006 |
| effect of different doses of x-ray irradiation on bulinus truncatus snails and eggs. | | 1976 | 1036429 |
| influence of diet on breeding and infectivity in mass cultivation of bulinus truncatus. | under well defined laboratory conditions as troughs, room temperature, humidity, water, and air supply bulinus truncatus was bred and kept. in a feeding trial high protein diet consisting of powdered mice pellets, commercial tropical fish food and lettuce was compared to poor protein diet of lettuce alone. higher yield of clutches, eggs and cercariae were observed in the rich protein diet group, bulinus and biomphalaria snail seem to be influenced by diet in the same way. | 1976 | 1029649 |
| [intragonadal embryonic developments observed after various interventions on the genital tract in some pulmonate gastropods and chiefly in bulinus truncatus (audouin)]. | | 2007 | 5152964 |
| copper sulphate as a molluscicide against bulinus truncatus eggs in iraq. | | 1969 | 5407902 |
| [snails and bilharziasis in corsica. distribution, frequency and biology of "bulinus truncatus"]. | | 2003 | 6008534 |
| [observations on the biology of bulinus truncatus in khouzistan (iran)]. | | 2006 | 13946816 |
| biological studies on the snail, bulinus truncatus, in central iraq. | this paper presents some results of field and laboratory studies on bulinus truncatus, the snail intermediate host of urinary bilharziasis in iraq, made in 1958 as part of the work of the who bilharziasis control project in that country.observations on the linear distribution and size composition of bulinus populations in the canals of central iraq indicate that molluscicides might most suitably be applied in may before the entire snail population reaches breeding size, or early in november when ... | 1961 | 14478049 |
| the breeding of bulinus truncatus in total darkness. | | 1961 | 13783438 |
| the relation of water volume to egg production in the snail bulinus truncatus. | | 1960 | 14425855 |
| [changes in the chemical composition of water & changes in abundance of the bulinus truncatus audion]. | | 1958 | 13573129 |
| [comparative evaluation of the abundance of reservoir in river mollusca, especially of the bulinus truncatus audouin]. | | 1958 | 13573128 |
| [biological rhythms of mollusca vectors of bilharziasis; seasonal factors & climatic effects on the reproduction cycle of bulinus truncatus & planorbarius metidjensis in north africa]. | | 1958 | 13573111 |
| experimental schistosomiasis; the culture of the snail vectors planorbis boissyi and bulinus truncatus. | | 1949 | 18121265 |
| life span and monthly mortality rate of bulinus truncatus and planorbis biossyi, the intermediate hosts of schistosomiasis in egypt. | | 1951 | 14841560 |
| [development rhythm of bulinus truncatus in laboratory rearing]. | | 1955 | 14388431 |
| the effect of water movement on populations of bulinus truncatus. | | 1957 | 13463218 |
| aminergic systems in pulmonate gastropod molluscs. iii. microspectrofluorometric characterization of the monoamines in the reproductive system. | histochemical fluorescence (falck-hillarp) and microspectrofluorometric (msf) methods were used to characterize different types of catecholamine-containing cellular elements located in the reproductive system of fresh-water snails (bulinus truncatus, planorbarius corneus) and land snails [archachatina marginata, helix (cryptomphalus) aspersa]. transverse sections through the genital tract display a common structural pattern of tubular differentiations: (1) an internal epithelium bordering the lu ... | 1980 | 7407867 |
| histochemical studies of some enzymes in the tissues of the schistosome vector snail bulinus truncatus (audouin) with special reference to the effects of a molluscicide. i. dehydrogenases. | the histochemistry of five dehydrogenases, namely isocitrate, succinate and lactate dehydrogenases and nadh and nadph diaphorases were studied in the tissues of the schistosome vector snail, bulinus truncatus, before and after treatment with the molluscicide frescon. isocitrate and succinate dehydrogenases showed their strongest activity in the respiratory epithelia, while lactate dehydrogenase showed a high level of activity in the tissues that are known to be capable of glycolysis. following t ... | 1980 | 6893833 |
| histochemical studies of some enzymes in the tissues of the schistosome vector snail bulinus truncatus (audouin) with special reference to the effects of a molluscicide. ii. hydrolases. | a comparative study of six hydrolases, acid and alkaline phosphatases, aryl sulphatase, beta-glucuronidase cholinesterase, and non-specific esterase, was carried out on the tissues of normal healthy and frescon-treated bulinus. the presence and activity of these enzymes in the tissues of normal animals were taken to indicate the probable functions of the tissues concerned. frescon administration caused inhibition of acid phosphatase and also induced the release of cholinesterase and non-specific ... | 1980 | 7451241 |
| lectin-binding specificities of bulinus truncatus hemocytes as demonstrated by microhemadsorption. | | 1981 | 7202790 |
| [potamopyrgus and bulinids in corsica (october 1980) (author's transl)]. | a survaey of corsican molluscs, in october 1980, confirms the extension of potamopyrgus jenkinsi. however two types of biotopes could be distinguished. in the first potamopyrgus is very abundant and isidora truncata (= bulinus truncatus) was not found. in the second type potamopyrgus are less numerous and coexist with bulinids. that the colonization by potamopyrgus is relatively ancient leads us to believe that the second type does not correspond to a preliminary stage of contamination, but rath ... | 1981 | 7332199 |
| the effects of starvation and refeeding on egg laying and the synthetic activity of the albumen gland in bulinus truncatus, a snail vector of urinary schistosomiasis. | 1. the effects of starvation (for 1, 2, 3, 6, 9 and 12 days, respectively) and refeeding (12 days starvation and 1, 2 and 3 days refeeding, respectively) on egg laying and albumen gland activity in the freshwater snail, bulinus truncatus were studied. 2. the egg laying of starving snails rapidly decreased and ceased by day 6 of starvation. egg laying was restored 24 hr after refeeding. the recorded decrease in albumen gland wet weight was proportional to the starvation periods. the dna contents ... | 1987 | 2887345 |
| laboratory selection for increased tolerance to niclosamide in bulinus truncatus (gastropoda: planorbidae) from iran. | survivors of bulinus truncatus from one exposure to niclosamide (bayluscide) were used to establish the next generation in a five generation long laboratory selection for increased tolerance to niclosamide. in a comparison of the tolerance to the molluscicide between two original and two selected strains about 150 snails of each strain, divided into four size-groups, were exposed to aliquots of the same niclosamide solution on the same day and during the same time of the day. it was shown that f ... | 1987 | 3689021 |
| [trematodes of bulinus truncatus (mollusca, planorbidae) in algeria]. | | 1988 | 3268052 |
| effect of canna indica l. leaves on the hermaphrodite gland of the snail bulinus truncatus (audouin). | | 1988 | 3391452 |
| ultrastructural changes in the male germ cells of bulinus truncatus during spermatogenesis. | the structure of the spermatogonia, spermatocytes, spermatids and sertoli cells of the hermaphroditic snail bulinus truncatus was studied by electron microscopy. the spermatogonia are small, with relatively large nuclei. the acrosome develops from a small proacrosomal granule which is probably derived from the golgi apparatus in the spermatocyte stage. condensation and elongation of the nuclei were found in the spermatids. the shape and components of the sertoli cells did not change during the s ... | 1989 | 2606387 |
| developmental and comparative aspects of nonsynaptic release by the egg-laying controlling caudodorsal cells of basommatophoran snails. | in an immunoelectron microscope study the postembryonic development of the cerebral caudodorsal cells (cdc) in the freshwater snail lymnaea stagnalis was studied as well as the development of similar neurons in other basommatophoran families. the cdc of adult l. stagnalis control egg-laying and associated behaviors by releasing various peptides, including the ovulation hormone cdch. the cdc release peptides from neurohemal axon terminals and from nonsynaptic release sites of axon collaterals. du ... | 1989 | 2767405 |
| functional morphology of the neuropeptidergic light-yellow-cell system in pulmonate snails. | the light yellow neuropeptidergic cell system of the basommatophoran snail lymnaea stagnalis is homologous to the r3-r14 system of the opisthobranch aplysia californica, and produces three different neuropeptides. systems homologous to the light yellow cells of lymnaea stagnalis have been investigated morphologically in two basommatophora (lymnaea ovata, bulinus truncatus) and three stylommatophora (helix aspersa, cepaea nemoralis, deroceras reticulatum). to this end, an antibody to synthetic li ... | 1994 | 7954689 |
| variable microsatellites in the highly selfing snail bulinus truncatus (basommatophora: planorbidae). | | 1994 | 7952334 |
| the genetical and environmental determination of phally polymorphism in the freshwater snail bulinus truncatus. | in some species of self-fertile pulmonate snails, two sexual morphs co-occur in natural populations: regular individuals and aphallic individuals that cannot transmit sperm to other snails. purely aphallic populations therefore reproduce obligatorily by selfing. understanding the evolution of aphally and selfing in these snails requires a precise knowledge of phally determination. in this paper, we investigate the genetic and environmental determination of aphally in bulinus truncatus by a surve ... | 1996 | 8770599 |
| microsatellites and the genetics of highly selfing populations in the freshwater snail bulinus truncatus. | hermaphrodite tropical freshwater snails provide a good opportunity to study the effects of mating system and genetic drift on population genetic structure because they are self-fertile and they occupy transient patchily distributed habitats (ponds). up to now the lack of detectable allozyme polymorphism prevented any intrapopulation studies. in this paper, we examine the consequences of selfing and bottlenecks on genetic polymorphism using microsatellite markers in 14 natural populations (under ... | 1996 | 8846901 |