Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| failure of irradiated echinostoma audyi and hypoderaeum dingeri to sensitize lymnaea rubiginosa snails. | attempts to induce acquired resistance in lymnaea rubiginosa snails against the echinostomes echinostoma audyi and hypoderaeum dingeri by means of irradiated miracidia were unsuccessful, although lie and coworkers using similar methods had recently sensitized biomphalaria glabrata against echinostoma lindoense (1975a). in contrast to the b. glabrata-e. lindoense system, in lymnaea rubiginosa the amebocytic response to irradiated parasites was slow: irradiated e. audyi sporocysts were encapsulate ... | 1977 | 607426 |
| rearing of the snail biomphalaria glabrata under axenic conditions in isolators. | germfree biomphalaria glabrata were successfully reared through their life cycle in isolators. the snails were fed a diet sterilized either by heat or by irradiation. snails fed an irradiated diet had a better growth and higher reproduction rate than the ones fed an autoclaved diet. there was no difference in survival between the two groups. | 1977 | 907039 |
| elevation of aminopeptidase activity in biomphalaria glabrata (mollusca) parasitized by echinostoma lindoense (trematoda). | 1978 | 624848 | |
| rheotaxis and chemoreception in the freshwater snail biomphalaria glabrata (say): estimation of the molecular weights of active factors. | 1. dilute solutions of lettuce and wheatgerm extracts trigger positive rheotaxis in the freshwater snail, biomphalaria glabrata. this response can be used as the basis of a sensitive bioassay for characterizing and identifying the chemicals to which the snail is attracted. 2. using ultrafiltration techniques a range of different molecular weight fractions could be attenuated or removed from these extracts. by comparing the activity of these solutions with that of the original extract an estimate ... | 1978 | 20693365 |
| [competition between helisoma duryi (wetherby 1879) and biomphalaria glabrata (say 1818) under laboratory conditions (pulmonata, planorbidae)]. | 1978 | 570720 | |
| degradation of the radula in the snails biomphalaria glabrata say and limnaea stagnalis l. (gastropoda, pulmonata). | the radula of snails is formed at the posterior end of the radular gland or pocket, and degraded at the same rate at its anterior end. degradation is due to different secretory activities of the inferior epithelium of the radular gland. its secretions seem to degrade enzymatically the matrix of the radular membrane and basal plates of teeth, leaving only chitin containing microfibres and degradation products. the sclerotized parts of the teeth remain unchanged, but as they are now only loosely c ... | 1978 | 719721 |
| [preliminary study of retriculate varieties of biomphalaria glabrata (say 1818) in comparison with pigmented and albino strains]. | 1978 | 653218 | |
| geographical differences in lectinic activity of albumen gland extracts of the planorbid snails biomphalaria glabrata and b. tenagophila. | 1978 | 675031 | |
| [selection in strains of biomphalaria tenagophila and biomphalaria glabrata for improving susceptibility to schistosoma mansoni]. | 1978 | 675140 | |
| laboratory and field trials of a slow-release copper molluscicide in st. lucia. | tests of a slow-release molluscicide containing 50% copper sulfate were under-taken in laboratory and field situations in st. lucia. in laboratory trials, a granule form of the molluscicide produced 100% mortality of biomphalaria glabrata down to 4 mg/liter active ingredient (a.i), while the pellet form produced 100% mortality down to 8 mg/liter a.i. in field trials, a dose of 100 mg/liter a.i. in granule form caused mortality of b. glabrata in banana drains but had no effect on b. glabrata pop ... | 1978 | 677373 |
| schistosoma mansoni: identification of chemicals that attract or trap its snail vector, biomphalaria glabrata. | a new bioassay for chemical attractants of aquatic snails demonstrated that biomphalaria glabrata could be attracted to or trapped in the vicinity of homogenates of lettuce. fractionation of homogenates revealed the amino acids glutamate and proline and the primary attractants. attraction was specific for the l form of glutamate. proline appeared to stimulate reproductive activity. glutathione, gamma-aminobutyric acid, and a number of other compounds had no effect. extracts of lyophilized snail ... | 1978 | 684418 |
| susceptibility of bahian population of biomphalaria glabrata to an allopatric strain of schistosoma mansoni. | seventeen populations of snails (biomphalaria glabrata) from the state of bahia, brazil were studied with respect to their susceptibility to infection with an allopatric strain of schistosoma mansoni. two of the populations were from the city of salvador, 3 from other sites in bahia, and 12 from habitats in the municipio castro alves. our data show that the bahian snail populations are extremely variable in their susceptibility to an allopatric strain of s. mansoni and that the phenomenon is not ... | 1978 | 686244 |
| an automatic method for recording the emergence of cercariae of schistosoma mansoni from the snail biomphalaria glabrata. | in order to study the pattern of emergence of trematode larvae from the snail hosts (s. mansoni from b. glabrata) an automatic apparatus was developed. this apparatus allows the snails, each suspended by a thread, to be transported at intervals of at least half an hour into different beakers into which the cercariae are shed. this "eclosion clock" is essentially a carriage driven on perlon wheels along steel bars. | 1978 | 695822 |
| [susceptibility of biomphalaria glabrata, albino variant, from belo horizonte, mg, to infestation by schistosoma mansoni, a parasite under natural conditions, of wild rodents of the vale do rio paraiba do sul, sp (brazil)]. | 1978 | 715359 | |
| schistosoma mansoni: lysozyme activity in biomphalaria glabrata during infection with two strains. | 1978 | 729698 | |
| hemocytes of biomphalaria glabrata: factors affecting variability. | 1978 | 731071 | |
| [ecology of intestinal schistosomiasis in guadeloupe. epidemiological analysis and data for a model study (author's transl)]. | in guadeloupe, during a general survey on intestinal schistosomiasis, the authors made a structural analysis of a limited focus of infection. the focus is formed by a river basin on the carribean coast of basse-terre island. sampling of the various elements of the parasitic cycle was done in spatial units defined by ecological and epidemiological criteria. the study of corresponding populations shows that: -- inside the twelve delimited sectors, only two include both hosts and parasites. they ar ... | 1978 | 746195 |
| relationship between a species of malaysian nematode daubaylia and the schistosome intermediate host biomphalaria glabrata. | 1978 | 749232 | |
| [molluscicidal properties of the euphorbia cotinifolia l (author's transl)]. | the hexanic extract from the leaves of euphorbia cotinifolia l. has been experimentally used as molluscicide against biomphalaria glabrata. the extract was fractionated and the most actives fractions were those of numbers 6 and 7. the lethal concentrations (lc50 and lc90 obtained using fraction 6 against adult snails were 1,2 and 2,4 ppm; for the eggs they were 25,0 and 48,0 ppm. with fraction 7 the lethal concentrations were 1,4 and 3,4 ppm for adult snails; for newly hatched snails they were 4 ... | 1978 | 751112 |
| [susceptibility of a strain of biomphalaria glabrata from venezuela to infection with 2 different strains of schistosoma mansoni]. | 1978 | 751168 | |
| immunodiffusion studies on schistosoma mansoni and its host stage specific antigens. 1. immunoelectrophoresis cross-reactions between s. mansoni adults and larval stages antigens. | immunoelectrophoresis was applied to evaluate the immunologic relationship between the different stages in the life cycle of schistosoma mansoni (s.m.). the preparation of antigens and antisera was described. separated female and male adult worms tested seem to be identical. eggs, miracidia and cercariae from biomphalaria glabrata and biomphalaria alexandrina showed varying degree of cross-reactions. the maximal number of pricipitin arcs was observed, when anti-miracidia-serum was checked agains ... | 1978 | 77218 |
| immunodiffusion studies on schistosoma mansoni and its host stage specific antigens. 2. immunoelectrophoresis cross-reactions between hepato-pancreas of biomphalaria glabrata and biomphalaria alexandrina. | immunoelectrophoresis was used for studies on immunological cross-reactions between both schistosoma mansoni (s. m.) intermediate host snails biomphalaria glabrata and biomphalaria alexandrina. the preparation of antigens and their corresponding antisera from hepato-pancreas of s. m. infected and non infected snails was described as the homologous reactions of both snails either infected or non infected were rather similar, close immunological relationship between b. glabrata and b. alexandrina ... | 1978 | 77219 |
| immunodiffusion studies on schistosoma mansoni and its intermediate host stage specific antigens. 3. immunoelectrophoresis cross-reactions between s. mansoni stages and biomphalaria sp. hepato-pancreas antigens. | immunoelectrophoresis was applied for cross-wise checking of the different stages in the life cycle of schistosoma mansoni with extracts of hepato-pancreas from its intermediate host snails biomphalaria glabrata and biomphalaria alexandrina. only few fractions were common to non infected snail organ and parasite development stage, while more crossreactions were detected with infected snail hepato - pancreas. | 1978 | 77220 |
| biomphalaria glabrata: lysozyme activities in the hemolymph, digestive gland, and headfoot of the intermediate host of schistosoma mansoni. | 1978 | 103747 | |
| aminopeptidase and lysozyme activity levels and serum protein concentrations in biomphalaria glabrata (mollusca) challenged with bacteria. | 1978 | 103974 | |
| evaluation of an experimental mollusciciding programme to control schistosoma mansoni transmission in st lucia. | the size and number of colonies of biomphalaria glabrata were reduced after four years of a surveillance/treatment snail control programme using an emulsifiable concentrate of niclosamide (25% active ingredient). surveys among the human population showed that the incidence of new schistosoma mansoni infections in 0-10 year-old children fell from 22% to 4.3%, while in a comparison area the incidence remained at 20%. with reduced transmission over four years, the prevalence of infection in a cohor ... | 1978 | 307443 |
| data on the life cycle of ribeiroia marini guadeloupensis n. ssp., a trematode sterilizing biomphalaria glabrata in guadeloupe. | data on the life cycle of ribeiroia marini guadeloupensis n.ssp., trematode sterilizing biomphalaria glabrata in guadeloupe. maintenance of the life cycle with a view to an eventual control of the populations of molluscs. in guadeloupe (french west indies), the definitive hosts of ribeiroia marini guadeloupensis n.ssp. are the two species of rats: rattus rattus and r. norvegicus. the first intermediate host is biomphalaria glabrata, the vector of intestinal schistosomiasis. the second intermedia ... | 1978 | 24996 |
| a simple quantitative technique for testing behavioral responses of schistosoma mansoni miracidia to chemicals. | we describe a new technique for testing responses of schistosoma mansoni miracidia to chemicals. miracidia in spring water were placed in a chamber shaped like the greek letter phi. small volumes of test chemicals were inoculated into one side of the chamber. after 30 sec a dam was inserted to bisect the chamber and the percentage of miracidia on the inoculated side was calculated. reproducible quantitative results were obtained using the known miracidial stimulants, snail-conditioned water (bio ... | 1978 | 25318 |
| [fertility of helisoma (seminolina) duryi (wetherby 1879) and biomphalaria glabrata (say 1818), cultured in laboratory (pulmonata, planorbidae)]. | 1978 | 549153 | |
| the ammonia and urea excretion of biomphalaria glabrata under different physiological conditions: starvation, infection with schistosoma mansoni, dry keeping. | 1978 | 299641 | |
| [vertebrate hormones influence on the reproduction of biomphalaria glabrata and on schistosoma mansoni infection (author's transl)]. | the influence of fifteen vertebrate hormones on the b. glabrata reproduction and on s. mansoni infection have been studied. hecogenine and pregnadienolone significantly increased the snail's number of eggs; testosterone, diethylstilbestrol and estradiol valerianate decreased their number of eggs and the mesterolone and progesterone produced a slight decrease in the number of eggs. crude hecogenine, pregnenolone, prednisone, estradiol, cholic acid, diosgenin, estrone and pregnadione have not show ... | 1978 | 581097 |
| competitive interaction between two snail hosts of schistosoma mansoni: laboratory studies on biomphalaria glabrata and b. straminea. | 1979 | 549209 | |
| [freshwater snails and vectors of schistosomiasis mansoni in martinique (french west indies)]. | an inventory of the freshwater molluscs in martinique was worked out during 1972 to 1978. each of the 19 species is shown with its main characteristics. the distribution of biomphalaria glabrata and biompharia straminea was studied. the epidemiological importance of these two snails is discussed. | 1979 | 575471 |
| effect of schistosoma mansoni infection on fecundity and perivitelline fluid composition in biomphalaria glabrata. | egg production in the snail, biomphalaria glabrata, infected with schistosoma mansoni declined on day 23 postinfection, and was significantly lower than uninfected control snails by day 28 and thereafter. protein and galactogen content of eggs produced by infected snails did not change during the period of reduced fecundity. this suggests that decreased hemolymph nutrient levels (rather than depleted albumen gland reserves) are responsible for inhibition of snail egg production. growth rates of ... | 1979 | 575549 |
| comparison of four species of snails as potential decoys to intercept schistosome miracidia. | preliminary studies have shown that various species of aquatic snails may be used as decoys or "sponges" to intercept schistosome miracidia, thereby preventing the miracidia from reaching the snails which normally serve as their intermediate host. in this study, four species of snails were evaluated as candidate decoys for field trials: marisa cornuarietis, pomacea australis, helisoma caribaeum, and tarebia granifera. in the laboratory all four species caused considerable reductions in the propo ... | 1979 | 434319 |
| [susceptibility of biomphalaria tenagophila and biomphalaria glabrata to 2 strains of schistosoma mansoni]. | 1979 | 482771 | |
| [intestinal schistosomiasis in the freshwater mangrove of guadalupe (french antilles). ecology of the vector, biomphalaria glabrata and its parasite schistosoma mansoni (author's transl)]. | in the freshwater mangrove of dubelloy-devarieux (guadalupe), the dynamics of populations of b. glabrata and the transmission of s. mansoni, mostly depends on the alternation of dry and rainy season. the flooding of the mangrove (in september), permits a yearly renewal of the malacological populations. the sizes analysis of the snails shows that the life cycle of b. glabrata include two rainy seasons separated by one dry season. the prevalence of b. glabrata (0,25%) and cercariae densities (0,8 ... | 1979 | 485041 |
| schistosome sporocyst-killing amoebae isolated from biomphalaria glabrata. | 1979 | 501126 | |
| radioisotope labeling of schistosoma mansoni miracidia for in vivo studies in biomphalaria glabrata. | 1979 | 501130 | |
| [evaluation of a trial to control biomphalaria glabrata in guadeloupe by using a sterilizing trematode (author's transl)]. | a trial of biological control of biomphalaria glabrata was carried out in guadeloupe by using ribeiroia marini guadeloupensis nassi, 1978, an autochtonal trematode which sterilizes the snail vector of schistosoma mansoni. the trial took place in a pond in which the population of b. glabrata presents an annual demographic cycle related to the alternation of dry and rainy seasons. about 8 millions eggs of r. marini were introduced in 15 months into the biotope. despite the low yield of these intro ... | 1979 | 539719 |
| bacterial flora of the schistosome vector snail biomphalaria glabrata. | the aerobic heterotrophic bacterial flora in over 200 individuals from 10 wild populations and 3 laboratory colonies of the schistosome vector snail biomphalaria glabrata was examined. internal bacterial densities were inversely proportional to snail size and were higher in stressed and laboratory-reared snails. the numerically predominant bacterial genera in individual snails included pseudomonas, acinetobacter, aeromonas, vibrio, and several members of the enterobacteriaceae. enterobacteriacea ... | 1979 | 539821 |
| specificity of natural resistance to trematode infections in biomphalaria glabrata. | 1979 | 541166 | |
| capacity of irradiated echinostome sporocysts to protect schistosoma mansoni in resistant biomphalaria glabrata. | 1979 | 541168 | |
| host reactions in biomphalaria glabrata to schistosoma mansoni miracidia, involving variations in parasite strains, numbers and sequence of exposures. | 1979 | 541169 | |
| alterations of the free amino acid content in the hemolymph of biomphalaria glabrata (pulmonata) in starvation and after infection with schistosoma mansoni (trematoda). | 1. analysing the free amino acid content of the hemolymph of normally fed, starved and schistosome-infected biomphalaria glabrata we identified 22 amino acids and amines, respectively. 2. in comparison with normally fed snails the free amino acid content of starved and infected snails was significantly reduced. 3. however, only slight differences between the ornithine and citrulline content occurred in the three test groups. | 1979 | 318425 |
| [experimental infection of biomphalaria glabrata with schistosoma mansoni in the presence of helisoma duryi]. | 1979 | 262314 | |
| [pomacea haustrum (reeve, 1856) as a decoy to infection of biomphalaria glabrata (say, 1818) with schistosoma mansoni sambon, 1907]. | 1979 | 262318 | |
| experimentally induced elevations in acid phosphatase activity in hemolymph of biomphalaria glabrata (mollusca). | 1979 | 119812 | |
| bge snail cell-line antigens: ineffectiveness as antischistosomal vaccine in mice. | mice and rabbits were immunized with antigens derived from bge cells, biomphalaria glabrata hemolymph, or schistosoma mansoni. antisera from mice given molluscan antigens did not form immunoprecipitates with soluble antigen from adult worms, but their binding to surfaces of sporocysts, cercariae, and schistosomules suggests the presence of cross-reacting determinants. in vitro, cell-mediated immune responses to bge antigens were not demonstrable in infected nor in immunized mice. mice immunized ... | 1979 | 120433 |
| acquired resistance to echinostomes in four biomphalaria glabrata strains. | 1979 | 541167 | |
| biological control of schistosome transmission in flowing water habitats. | marisa cornuarietis was evaluated in puerto rico for control of schistosome transmission in flowing water. a population of biomphalaria glabrata and their schistosome infections disappeared after introduction of 20,000 m. cornuarietis to an endemic stream, while in nearby untreated streams the b. glabrata population remained stable and the schistosome prevalence increased. this method cost u.s. $0.10 per capita for over a year of protection, 5%-10% of the cost of chemical control. | 1979 | 484776 |
| [influence of edta on growth and reproduction of biomphalaria glabrata (author's transl)]. | the influence of edta on b. glabrata has been investigated. newly hatched snails were exposed to concentrations of edta from 1 to 64 ppm, and young (diameter of 6 mm) snails to concentrations of 50, 80 and 100 ppm, for periods of 90 days. fifty percent reduction of egg productivity has been caused by concentration of 16 ppm of edta while 50% of mortality has occurred at about 70 ppm. the calcium and iron content both in treated and non-treated young snails have been estimated by atomic absorptio ... | 1979 | 119284 |
| histochemical and electrophoretical studies in normal and infected biomphalaria glabrata. ii. acid and alkaline phosphatase. | various organs of normal and infected biomphalaria glabrata were analysed, electrophoretically and histochemically, with respect to the acid phosphatase and alkaline phosphatase activity. in general, digestive gland, ovotestis and stomach show an increase in acid phosphatase activity in infected snails, whereas kidney and albumen gland show less activity. alkaline phosphatase does not show any significant different in activity between normal and infected snails. electrophoretically digestive gla ... | 1979 | 515466 |
| purification and binding properties of hemagglutinin from biomphalaria glabrata. | 1979 | 438526 | |
| 2-aminoethylphosphonic acid metabolism during embryonic development of the planorbid snail helisoma. | in freshly laid egg masses of helisoma sp., more than 95 percent of the phosphorus is found in alkylphosphonic acids, as determined by phosphorus-31 nuclear magnetic resonance spectroscopy. these compounds are metabolized during embryonic development, as shown by differential acid hydrolysis and experiments with phosphorus-33-labeled phosphoric acid. further, nuclear magnetic resonance spectroscopy indicates phosphonic acid involvement in related snail families, including the schistosomal vector ... | 1980 | 17811198 |
| effect of exposure to echinostoma liei miracidia on growth and survival of young biomphalaria glabrata snails. | 1980 | 7451021 | |
| echinostome cercarial penetration and metacercarial encystment as mortality factors for a second intermediate host, biomphalaria glabrata. | cercarial penetration and metacercarial encystment of echinostoma liei in biomphalaria glabrata caused high mortality of juvenile snails (3-8 mm in diameter) after 4 to 6 days of continuous exposure to about 150 cercariae per snail per day. larger snails (10-13 mm) withstood cercarial penetration longer, significant mortality appearing 16 days after exposure. life-table analysis showed that the snail mortality rate per age interval increased with increasing exposure to echinostome penetration. s ... | 1980 | 7420245 |
| abnormal growths from the digestive gland of biomphalaria glabrata. | 1980 | 7373070 | |
| bacterial flora of the schistosome vector snail biomphalaria glabrata. | [this corrects the article on p. 671 in vol. 38.]. | 1980 | 16345524 |
| echinostoma liei miracidia and biomphalaria glabrata snails: effect of egg age, habitat heterogeneity, water quality and volume on infectivity. | 1980 | 7189513 | |
| biogenic amine metabolism in biomphalaria glabrata i. catechol-o-methyltransferase activity. | in contrast to mammalian tissues, catechol-o-methyltransferase (comt) activity is localized predominantly, if not entirely, in the cytosolic fraction in the tissues of biomphalaria glabrata. enzymatic activity is greater in glycylglycine and tris-cl buffers than in phosphate buffer. the ph optimum for this enzymatic reaction is 8.5. the catalysis is stimulated by magnesium ion, other divalent cations are less effective in this reaction. the km values for 3,4-dihydroxybenzoate and s-adenosylmethi ... | 1980 | 7390704 |
| leucocytosis in biomphalaria glabrata sensitized and resensitized to echinostoma lindoense. | 1980 | 7365269 | |
| genetic studies on amebocytic accumulations in biomphalaria glabrata. | 1980 | 7365268 | |
| [melamine action on biomphalaria glabrata say (mollusca, gasteropoda) (author's transl)]. | 1980 | 7244530 | |
| edema-horn, an abnormal mutant of biomphalaria glabrata. | 1980 | 6928918 | |
| behavioural responses to amino acids and related compounds, including propionic acid, by adult biomphalaria glabrata (say), a snail host of schistosoma mansoni. | 1980 | 6104559 | |
| lectin-binding specificities of hemocytes from two strains of biomphalaria glabrata as determined by microhemadsorption assays. | 1980 | 7192226 | |
| [liberation of schistosoma mansoni, sambon, 1907 cercariae by biomphalaria glabrata (say, 1818) maintained in a medium with magnesium thermophosphate]. | 1980 | 6294756 | |
| infectivity of a microsporidium of mosquitoes (nosema algerae) to larval stages of schistosoma mansoni in biomphalaria glabrata. | 1980 | 6778833 | |
| [life cycle of clinostomum golvani n. sp. (trematoda : clinostomidae) a larval parasite of biomphalaria glabrata, the snail vector of schistosoma mansoni in guadeloupe (author's transl)]. | the life cycle of a new species of clinostomidae, clinostomum golvani, described in guadeloupe (french west indies). the first intermediate host is the snail vector of schistosoma mansoni in this island, biomphalaria glabrata, which can be sterilized by this parasite. poecilia reticulata (guppy) serves as the second intermediate host. adult worms were obtained under experimental conditions from butorides virescens (the definitive host in nature), nycticorax nycticorax and ardea purpurea. the adu ... | 1980 | 7224533 |
| therapeutic efficacy of oral oxamniquine in the toxemic form of schistosomiasis mansoni: treatment of eleven individuals from two families, and experimental study. | two families, comprising 11 individuals in the toxemic form of schistosomiasis mansoni, infected in belo horizonte, brazil were treated. parasitological cure was obtained in 5 (45%) of the patients after a single oral dose of oxamniquine (mansil), 20 mg/kg body weight. no significant side effects were observed. to evaluate the possibility of resistance to the drug, cercariae collected from biomphalaria glabrata infected with micracidia from eggs obtained from three of the individuals not cured w ... | 1980 | 7352627 |
| the destruction of schistosoma mansoni mother sporocysts in vitro by amoebae isolated from biomphalaria glabrata: an ultrastructural study. | 1980 | 7365267 | |
| differential leukocytic responses of biomphalaria glabrata to infection with schistosoma mansoni. | 1980 | 7365270 | |
| biomphalaria glabrata amoebocytes: effect of schistosoma mansoni infection on in vitro phagocytosis. | 1980 | 7373069 | |
| experimental pathogenicity of vibrio parahaemolyticus for the schistosome-bearing snail biomphalaria glabrata. | the bacterium vibrio parahaemolyticus was found to be pathogenic for the schistosome intermediate host biomphalaria glabrata (say). when administered topically, a nonenteritis-associated strain of the bacterium had an ld50 (median lethal dose) of 6.8 x 10(7) cells per snail. a 5% trichloroacetic acid (tca) extract from v. parahaemolyticus was found to kill b. glabrata. sublethal effects of v. parahaemolyticus include shell deterioration and increased heart rate. both albino aquarium populations ... | 1980 | 7378944 |
| macrophagelike hemocytes of resistant biomphalaria glabrata are cytotoxic for sporocysts of schistosoma mansoni in vitro. | when schistosoma mansoni miracidia penetrate resistant individuals of the intermediate host snail biomphalaria glabrata, the sporocyst is encapsulated by hemocytes (macrophagelike cells of the snail circulation) and killed. in our in vitro model the same fate requires only sporocysts and snail hemolymph. however, when cultured in plasma alone (cell-free hemolymph), sporocysts remain viable for more than 3 days, regardless of whether the plasma is from susceptible or resistant snails. when hemoly ... | 1980 | 7391885 |
| inducement of miracidia-immobilizing substance in the hemolymph of biomphalaria glabrata. | 1980 | 7409973 | |
| schistosoma mansoni: cytotoxicity of hemocytes from susceptible snail hosts for sporocysts in plasma from resistant biomphalaria glabrata. | 1980 | 7428914 | |
| [biological competition between biomphalaria glabrata (say, 1818) and biomphalaria tenagophila (d'orbigny, 1835), in natural breeding areas in the municipality of ourinhos, s.p. (brazil)]. | 1980 | 7433874 | |
| tissue reactions induced by schistosoma mansoni in biomphalaria glabrata. | in biomphalaria glabrata with a strong natural resistance, schistosoma mansoni sporocysts are rapidly encapsulated by granulocytes and killed, mainly by the strong phagocytic activity of the cells. irradiated echinostoma paraensei sporocysts seem able to suppress the function of the granulocytes. tissue reactions in snails with self-cure demonstrate: involvement of two types of cells, granulocytes and hyalinocyte-like cells; formation of amoeba-fibrous capsules; limited tendency of granulocytes ... | 1980 | 7436601 |
| abnormal development of the digestive gland in biomphalaria glabrata. | 1980 | 7440998 | |
| schistosoma mansoni control in cul de sac valley, saint lucia. i. a two-year focal surveillance-mollusciciding programme for the control of biomphalaria glabrata. | an area-wide mollusciciding campaign in cul de sac valley, st. lucia reduced incidence of schistosoma mansoni from 22% to 4.3% between 1970 and 1975. following this, a two-year focal surveillance-mollusciciding programme was introduced. sites of potential transmission of s. mansoni were identified and routinely searched for biomphalaria glabrata. if found, the site was treated with clonitralide 25% emulsifiable concentrate. two chemotherapy campaigns supplemented the snail control programme. as ... | 1980 | 7445045 |
| the boqueron project after 5 years: a prospective community-based study of infection with schistosoma mansoni in puerto rico. | the boqueron schistosomiasis project is a prospective community-based study of schistosoma mansoni infection after the interruption of transmission by nonchemotherapeutic control measures. the study methods and the parasitologic results of the first five annual stool surveys are described in this report. in the first year, 1972, among 904 inhabitants (88% of the total population) the prevalence of infection was 40%, and the geometric mean intensity of infection among positives was 16.1 eggs per ... | 1980 | 7446813 |
| metabolic interrelationship of parasitic trematodes and molluscs, especially schistosoma mansoni in biomphalaria glabrata. | 1980 | 7456639 | |
| [cellular immunity in mollusk hosts of schistosomes. primary results regarding biomphalaria glabrata]. | cell culture are obtained from the saccular part of the kidney of biomphalaria glabrata in a medium derived from schneider drosophilia medium. two types of cells migrate from the explant: numerous amoebocytes and some fibroblasts. migration of amoebocytes appears to be regular. these amoebocytes are able to encapsulate and destroy particules and dead miracidiums. amoebocytes from incompatible snails rapidly surround miracidiums and early larvae (primary sporocysts) whereas compatible miracidium ... | 1980 | 7460123 |
| emergence of third-stage larvae of angiostrongylus costaricensis morera and cespedes 1971 from biomphalaria glabrata (say). | 1980 | 7463259 | |
| [specificity and active principle of bacillus thuringiensis var. israelensis]. | bio-assays of b. thuringiensis var. israelensis on larvae of drosophila melanogaster, musca domestica, culicoides sp. and chironomus plumosus are negative except in the last case, but only with doses much higher than those which are lethal for mosquito larvae. tests on mollusks (biomphalaria glabrata) and golden fishes are also negative. the specificity of action of the h 14 serotype, limited to a few diptera families, should be mainly related to the special characteristics of its crystals, whic ... | 1981 | 7249246 |
| dynamics of larval populations of schistosoma mansoni in biomphalaria glabrata. i rhythmic production of cercariae in monomiracidial infections. | 1981 | 7271357 | |
| schistosoma mansoni, nih-sm-pr-2 strain, in susceptible and nonsusceptible stocks of biomphalaria glabrata: comparative histology. | of 10 inbred stocks of biomphalaria glabrata examined, eight were susceptible to the nih-sm-pr-1 strain (pr-1) of schistosoma mansoni, whereas only three were susceptible to the nih-sm-pr-2 strain (pr-2). by employing a histological ranking system based on parasite development and host tissue response, we have observed a range of nonsusceptibility among stocks nonsusceptible to pr-2. in three nonsusceptible stocks, sporocysts were rapidly surrounded by host amebocytes and were destroyed within a ... | 1981 | 7299581 |
| [contribution to the study of nervous system in larval and adult forms of schistosoma mansoni sambon, 1907 (trematoda digenea). ii. role of serotonine and dopamine (author's transl)]. | this study provides details concerning the localization and role of 5-ht and da in schistosoma: 1) 3h-5ht is incorporated selectively by the nerve fibers containing dense granules measuring 820 +/- 20 a (type 2 granules), combined at times with other structures; the presence of "cold" dopamine in the environment does not alter the incorporation; 2) 3h-da is also incorporated in vitro by the nerve fibers and occasionally by the muscle fibers of the adult schistosoma; 3) neither the intraovular mi ... | 1981 | 7316398 |
| dynamics of larval populations of schistosoma mansoni in biomphalaria glabrata ii. chronobiology of the intramolluscal larval development during the shedding period. | 1981 | 7316580 | |
| schistosoma mansoni: effect on growth, fertility, and development of distal male organs in biomphalaria glabrata exposed to miracidia at different ages. | growth, egg laying rate, and mortality of biomphalaria glabrata (portorican strain), maintained in groups of two, after exposure at different ages (1, 2, 4, 6, 8 weeks) to three miracidia each of schistosoma mansoni (liberian strain) were determined. the findings in infected snails were compared with those in exposed but uninfected (negative) and in unexposed snails. younger snails were infected at higher rates, and these showed a significantly increased mortality. young infected snails grew muc ... | 1981 | 7324545 |
| selective interference with granulocyte function induced by echinostoma paraensei (trematoda) larvae in biomphalaria glabrata (mollusca). | various trematode larvae can interfere with the host snail's resistance to the same or unrelated trematode species, chiefly, it appears by interference with the function of the host's granulocytes. in biomphalaria glabrata infected with the trematodes, echinostoma paraensei, granulocytes lose their ability to encapsulate the larvae of trematodes to which the hosts were previously resistant. however, the granulocytes in these snails retain their ability to encapsulate injected latex spheres, or l ... | 1981 | 7328451 |
| reduction in transmission of schistosoma mansoni by a four-year focal mollusciciding programme against biomphalaria glabrata in saint lucia. | the effect of transmission of schistosoma mansoni of a focal snail control programme was investigated over four years amongst approximately 1250 people living in five communities in the steep-sided soufriere river valley, st. lucia, west indies. bayer 6076 was applied from constant flow drip cans to 12 stream sections at a target dose of 8 mg/litre clonitralide every four weeks. only proven and potential transmission sites were treated; marsh habitats, where biomphalaria glabrata were widespread ... | 1981 | 7330940 |
| [evolution of spopocysts of schistosoma mansoni sambon 1907 in biomphalaria glabrata (say 1818) and biomphalaria tenagophila (d'orbigny 1835)]. | 1981 | 7336119 | |
| [susceptibility to schistosoma mansoni infection of biomphalaria glabrata and biomphalaria tenagophila in the federal district, brazil]. | 1981 | 7345560 | |
| concanavalin a-induced receptor redistribution on biomphalaria glabrata hemocytes: characterization of capping and patching responses. | 1981 | 7024423 | |
| interactions between st. lucian biomphalaria glabrata and helisoma duryi, a possible competitor snail, in a semi-natural habitat. | in artificial drains similar to those used in banana culture on st. lucia, helisoma duryi, the rams-horn snail, controlled biomphalaria glabrata, intermediate host of schistosomiasis on that island. time required for elimination of b. glabrata depended on environmental temperature and numbers of h. duryi initially introduced in the drains. best fit to the data was given by the equation for the logistic curve rather than by an equation for unlimited growth. multiple regression analyses of natalit ... | 1981 | 6123247 |
| an isoenzyme marker possibly associated with the susceptibility of biomphalaria glabrata populations to schistosoma mansoni. | nine laboratory populations and one field population of the snail host biomphalaria glabrata were compared with respect to their electrophoretic patterns for acid phosphatase (acp) and with their susceptibility to schistosoma mansoni infection. a strong correlation (r = 0.98) was noted between the frequency of the isoenzymes acp2-s and acp2-f observed in the populations and the level of snail susceptibility as determined by bioassay. the isoenzyme acp2-s was associated with susceptibility, acp2- ... | 1981 | 6123248 |
| resistance to schistosome infection in biomphalaria glabrata induced by gamma radiation. | 1981 | 7196934 |