| intraspecific variations in the hemolymph of biomphalaria glabrata, a snail host of schistosoma mansoni. | an attempt was made to characterize the hemolymph of biomphalaria glabrata with reference to "normal" intra-specific variation, i.e., both inter- and intra-strain differences. total protein concentration, per cent hemoglobin, ph, and osmolarity were studied. seven geographic strains of b, glabrata were examined. in addition, observations were made on the hemolymph of biomphalaria straminea, several strains of helisoma caribaeum, and on b. glabrata subjected to infection with schistosoma mansoni ... | 1975 | 3698 |
| rats and bilharziasis in guadeloupe. | the rats in guadeloupe (rattus rattus and rattus norvegicus) may play a part in schistosomiasis in three ways: - by harbouring fertile s. mansoni, a fact which serves to increase the total population of the parasite and may eventually take part in the infestation of man; - by harbouring a great number of ribeiroia marini, a trematode whose larval stages sterilize biomphalaria glabrata, the vector of schistosomiasis; - simply by eating b. glabrata. the quantitative influence of these contradicto ... | 1975 | 7114 |
| 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 |
| lectin and human blood group determinants of schistosoma mansoni: alteration following in vitro transformation of miracidium to mother sporocyst. | a mixed agglutination assay method was employed to detect the presence of surface determinants for various lectins and human blood group antibodies on schistosoma mansoni miracidia and cultured mother sporocysts. miracidia were found to possess surface receptors for the lectins con a (concanavalin a), anti-heel (eel serum agglutinin), and anti-adb (dolichos seed extract), as well as human anti-a antibodies. following in vitro transformation of the miracidium to mother sporocyst, anti-heel and hu ... | 1977 | 72142 |
| 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 |
| 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 |
| schistosoma mansoni and biomphalaria glabrata: ultrastructural localization of enzymes with diaminobenzidine in larvae and host digestive glands. | | 1975 | 235445 |
| [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 |
| the ammonia and urea excretion of biomphalaria glabrata under different physiological conditions: starvation, infection with schistosoma mansoni, dry keeping. | | 1978 | 299641 |
| effect of helisoma duryi on the survival, growth, and cercarial production of schistosoma mansoni-infected biomphalaria glabrata. | biological control of the intermediate hosts of s. mansoni and s. haematobium by means of a competitor snail,helisoma duryi, has been suggested. in the present laboratory study, information was obtained concerning the interspecific competition between h. duryi and b. glabrata. the results indicated that the growth rate, mortality rate, and cercarial production of s. mansoni-infected b. glabrata were highly influenced by h. duryi. these observations agree with results obtained in earlier experime ... | 1977 | 303959 |
| 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 |
| 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 |
| lysozymelike activity in the hemolymph of biomphalaria glabrata challenged with bacteria. | | 1977 | 403240 |
| [differences in the sensilla of african and american cercaria of schistosoma mansoni, the agent of human intestinal bilharziasis]. | schistosoma mansoni parasite of the human intestinal bilharziasis is frequently transmitted in africa by the snail biomphalaria pfeifferi and in america by biomphalaria glabrata. the comparison between four african strains of cercariae obtained from biomphalaria pfeifferi and five american strains from biomphalaria glabrata points out variations in the number and arrangement of the sensory receptors. | 1977 | 404049 |
| 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 |
| [fertility of helisoma (seminolina) duryi (wetherby 1879) and biomphalaria glabrata (say 1818), cultured in laboratory (pulmonata, planorbidae)]. | | 1978 | 549153 |
| 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 |
| [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 |
| metacercarial cyst formation in vitro of echinostoma paraensei. | cercariae of echinostoma paraensei lie and basch 1968 encysted normally in the presence of biomphalaria glabrata embryo (bge) cells in culture, partially in culture conditioned medium, and not at all in fresh culture medium alone. at the ultrastructural level the cyst is composed of 2 well defined regions. the outer cyst wall (ocw) is particulate to fibrous in nature, formed from secretory granules released from the cercarial tegument. membranous scrolls or rodlets secreted from the subtegumenta ... | 1977 | 592031 |
| [microcalorimetric investigations of the host-parasite relationship between biomphalaria glabrata and schistosoma mansoni (author's transl)]. | 1. the ratio of dry weight to wet weight of infected snails (5.5 +/- 2.2%) is significantly smaller than that of uninfected animals (8.3 +/- 1.0%). 2. the specific values of oxygen consumption and heat-production per dry weight are significantly higher for infected snails (2.41 +/- 0.44 microliter o2/h/mg; 12.63 +/- 1.24 muw/mg) than for uninfected ones (1.88 +/- 0.24 microliter o2/h/mg, 8.94 +/- 0.91 muw/mg). 3. the rate of oxygen consumption always suffices to explain the measured heat flows f ... | 1977 | 595796 |
| acid phosphatase in granulocytic capsules formed in strains of biomphalaria glabrata totally and partially resistant to schistosoma mansoni. | | 1977 | 598965 |
| [redescription of d'apatemon (apatemon) graciliformis szidat, 1928 (trematoda: strigeidae) with a preliminary note on its life cycle (author's transl)]. | apatemon (apatemon) graciliformis szidat, 1928 is redescribed from specimens obtained experimentally in the domestic duck; the larval stages develop in biomphalaria glabrata in guadeloupe (french west indies). | 1977 | 603200 |
| experimental double infection of biomphalaria glabrata snails with angiostrongylus cantonensis and schistosoma mansoni. | two groups of biomphalaria glabrata snails primarily infected with angiostrongylus contonensis were secondarily exposed to infection with schistosoma mansoni. to investigate any anatagonistic effect of the first infection on a superimposed one and to compare to singly and non-infected snails, a series of experiments was undertaken in which snails were individually exposed, variously, to 1,000 and 2,000 first-stage larvae of a. cantonensis and then to 5 and 10 miracidia of s. mansoni 1 day and 3 ... | 1977 | 605654 |
| the predatory activity of lebistes reticulatus (peters, 1859) on schistosoma mansoni miracidia in laboratory experiments. | laboratory experiments were conducted to evaluate the role of the guppy, lebistes reticulatus (peters, 1859), as an active predator on schistosoma mansoni miracidia. when five guppies were introduced into 3.5 liters of water containing 500 and 1200 miracidia on two corresponding tests, a dramatic reduction in number of miracidia was observed. in one experiment, no miracidia could be found after 60 minutes of exposure. the infection rates of vector snails, biomphalaria glabrata, exposed to approx ... | 1977 | 610026 |
| [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 |
| immunodiagnosis of human schistosomiasis using different immunoprecipitation techniques. | one hundred sera of individuals infected with schistosoma mansoni and/or s. haematobium were examined for the presence of specific anti schistosoma antibodies by means of different immunoprecipitation techniques: immunoelectrophoresis, immunodiffusion, immunoelectroosmophoresis (on two different supports), and electroimmunodiffusion. the immunoelectroosmophoresis proved to be superior to the other immunoprecipitation techniques, its main advantages being sensitivity, rapidity, and economic use o ... | 1975 | 810988 |
| [castration of the snail biomphilaria glabrata by the larvae of various guadeloupean trematoda]. | four species of trematoda accomplish their larval development in the snail biomphalaria glabrata. they determine the sterility of the mollusc in different ways and could be used in the biological control of schistosomiasis resulting from schistosoma mansoni. | 1975 | 811375 |
| [antigenic structure of hemolymph and tissue extract of biomphalaria glabrata infested or not infested with schistosoma mansoni]. | | 1975 | 819148 |
| lipase activity in the hemolymph of biomphalaria glabrata (mollusca) challenged with bacterial lipids. | | 1976 | 819589 |
| studies on resistance in snails: interference by nonirradiated echinostome larvae with natural resistance to schistosoma mansoni in biomphalaria glabrata. | | 1977 | 850073 |
| in vitro development of schistosoma mansoni cercariae. | early cercarial embryos of schistosoma mansoni developed to swimming cercariae within seven days in vitro, via the same sequence of stages as reported in vivo. the presence of living biomphalaria glabrata cells (bge line) was indispensable for proper development. cultured cercariae were water-sensitive, gave no cercarienhüllen reaction, and appeared to lack the surface glycocalyx. further development was not detected in mice or hamsters. | 1977 | 859081 |
| schistosoma mansoni: susceptibility reversal with age in the snail host biomphalaria glabrata. | | 1977 | 862703 |
| schistosoma mansoni, echinostoma lindoense, and paryphostomum segregatum: interference by trematode larvae with acquired resistance in snails, biomphalaria glabrata. | | 1977 | 885213 |
| schistosoma mansoni: temporary reduction of natural resistance in biomphalaria glabrata induced by irradiated miracidia of echinostoma paraensei. | | 1977 | 891714 |
| biological control of biomphalaria glabrata in major reservoirs of puerto rico. | | 1977 | 907040 |
| control of schistosoma mansoni transmission by chemotherapy in st. lucia. ii. biological results. | chemotherapy of all persons infected with schistosoma mansoni was begun in marquis valley, st. lucia, in march 1974. from january 1972 to the start of chemotherapy, the infection rate in field biomphalaria glabrata collected in the valley was 1.09% (117/10,736) and the rate in sentinel b. glabrata was 1.48% (56/3,790). from march 1974 through december 1975, no infections were detected in either field snails (11,742 collected) or sentinel snails (3,230 exposed). the accumulated date suggest that, ... | 1977 | 907052 |
| [the ketone bodies in the hemolymph of biomphalaria glabrata under starvation and infection with schistosoma mansoni (author's transl)]. | the metabolism of the snail biomphalaria glabrata stressed by five days' starvation as well as by infection with schistosoma mansoni was examined with regard to the metabolism of ketone bodies. previous studies in the metabolism of this host--parasite relationship always resulted in changes in the same direction with starvation as well as with infection. contrary to that the concentration of acetoacetate and beta-hydroxybutyrate measured in the hemolymph decreased significantly with starvation b ... | 1977 | 919681 |
| the mode of infection with and the distribution of angiostrongylus cantonensis larvae in the experimental intermediate hoist biomphalaria glabrata. | | 1977 | 919700 |
| [natural transmission of schistosoma mansoni in guadeloupe (french antilles). preliminary note (author's transl)]. | occasioning in guadeloupe a high rate of morbidity, schistosomiasis is unequally spread in the field. the intermediate host, biomphalaria glabrata, is wide-spread. but some biotopes only, most of them located on the coast belt of the montainous island, allow the parasite growth. among them, the irrigation canals appear as the most dangerous source of contamination for human population. | 1977 | 921190 |
| [principal factors involved in the settlement of biomphalaria glabrata (say, 1818), snail intermediate host of schistosomiasis in guadalupe (author's transl)]. | six biotopes of biomphalaria glabrata, the snail intermediate host of schistosomiasis in guadalupe, were investigated during one annual cycle. these six biotopes included a pond, a freshwater mangrove, a stream, a mountain lake, a "microhabitat" and a canal. these six types of biotopes were characterized by various parameters whose fluctuations reveal the main factors regulating the b. glabrata populations. the climatic factors are essential in grande terre and resulted in an annual development ... | 1977 | 921191 |
| [factors responsible for cercarial concentration of schistosoma mansoni in guadeloupe]. | research carried out in guadeloupe on the sites of transmission of schistosoma mansoni shows that the circadian evolution of the cercarial concentration (rhythm of presence) differs slightly according to the biotope:--in a running water habitat (greater than 0,10 m/s) the rhythm of presence is superimposed on the rhythm of emergence, which leads to a risk of contamination reaching a maximum between 11 a.m. and noon; --in a slow running water habitat (around 0,01 m/s), the acrophase of the rhythm ... | 1977 | 931320 |
| study of growth of biomphalaria glabrata say and other planorbidae in guadeloupe west indies. | the growth of biomphalaria glabrata, b. schrammi, drepanotrema lucidum and d. kermatoides was studied in three habitatis on guadeloupe. theortical growth curves were calculated for each species by applying the walford method and the von bertalanffy equation. on guadeloupe, the growth of b. glabrata was faster in the ponds of grand terre than in the small high altitude streams of basse terre. there is good correlation between the observations made in guadeloupe and previous data obtained on puret ... | 1976 | 938125 |
| the karyotype of biomphalaria glabrata, the snail vector of schistosoma mansoni. | karyotyping was done on the mitotic metaphase chromosomes obtained from the embryos of biomphalaria glabrata. the 18 chromosome pairs were identified and classified into 6 groups. the diploid cell has 10 pairs of metacentric, 4 pairs of submetacentric, 2 pairs of acrocentric and 2 pairs of telocentric chromosomes. the pair number 8 with secondary constriction can be used as a marker in genetic experiments. | 1976 | 948208 |
| studies on resistance in snails. 7. evidence of interference with the defense reaction in biomphalaria glabrata by trematode larvae. | echinostoma lindoense sporocysts that develop from irradiated miracidia normally are destroyed by amebocyte capsules in the ventricle of biomphalaria glabrata within 10 days postexposure. the survival period of these ventricular sporocysts was considerably longer in snails that also harbored normal sporocysts of e. lindoense, paryphostomum segregatum, or schistosoma mansoni. protection of irradiated e. lindoense sporocysts by the same of different trematode species is presumed to be the result o ... | 1976 | 957039 |
| effect of manganese on biomphalaria glabrata infected with schistosoma mansoni. | | 1976 | 977981 |
| [presence of angiostrongylus cantonensis in the réunion island. isolation of the strain]. | the detection of some cases of eosinophilic meningitis suggest that angiostrongylus cantonensis is present in reunion island. larvae of this nematode have been isolated after dissection of achatina fulica and have been used to infest laboratory rats. 30 days later, the dissection of these animals shows the presence of young worms in the brain and in the pulmonary arteries. 45 days later, first-stage larvae are recovered from the feces of animals. now, the strain is maintained in biomphalaria gla ... | 1976 | 1037434 |
| [french guiana and bilharziasis]. | the authors discuss about the lack of bilharziasis in french guyana and report the experimental infestation of biomphalaria glabrata coming from cayenne with a porto-rican strain of schistosoma mansoni. | 1976 | 1037435 |
| histologic and cytochemical observations of the effects of schistosoma mansoni on biomphalaria glabrata. | | 1975 | 1072600 |
| distribution of the snail biomphalaria glabrata, intermediate host of schistosoma mansoni, within a st lucian field habitat. | a total of 6360 mud samples were obtained, in 62 collections made with an exhaustive sampling device, from banana drains on the west indian island of st lucia during fortnightly samplings over a 2(1/2)-year period. analysis of counts of the snail biomphalaria glabrata from these samples showed that this species had a contagious distribution. this finding is consistent with other evidence that banana drains form a rigorous habitat for b. glabrata. its distribution was more contagious than that of ... | 1975 | 1084797 |
| variations in infectivity for biomphalaria glabrata in strains of schistosoma mansoni from the same geographical area. | genetic differences in infectivity for intermediate snail hosts in two strains of s. mansoni from the same geographical area and within a single isolated parasite population are reported. the importance of recognizing the potential for such genetic variation is stressed. | 1976 | 1088517 |
| immunoprecipitation and class-specific immunofluorescence titration of human serum antibodies to schistosoma mansoni antigens. | twenty sera of individuals with schistosoma mansoni infections were examined by means of immunoelectrophoresis, indirect flourescent antibody (ifa) technique and the defined antigen substrate spheres (dass) system. immunoprecipitins against s. mansoni antigen and against antigen of the intermediate host, biomphalaria glabrata, were demonstrated. the presence of specific anti-s. mansoni iga, igm, igg and ige antibodies were demonstrated. the presence of specific anti-s. mansoni iga, igm, igg and ... | 1975 | 1096483 |
| transaminase levels in the digestive gland-gonad of schistosoma mansoni-infected biomphalaria glabrata. | | 1975 | 1109822 |
| selective depletion of hemolymph proteins of biomphalaria glabrata infected with schistosoma mansoni. | | 1975 | 1117358 |
| survival and cercaria production of brazilian biomphalaria glabrata and b. straminea infected with schistosoma mansoni. | | 1975 | 1117359 |
| superinfection of biomphalaria glabrata with schistosoma mansoni. | biomphalaria glabrata 2 to 12 mm in diameter were exposed to 1 miracidium of schistosoma mansoni and after 15, 30, or 60 days were reexposed to the homologous strain. the criterion of superinfection was the subsequent escape of cercariae of both sexes. opposite sex superinfection was acquired by 45 of 106 snails of various sizes, all of which were in the group reexposed at 30 days. the observations confirm those of kagan and geiger and suggest that in the schistosomes a maximizing of the number ... | 1975 | 1117376 |
| schistosoma mansoni miracidial behavior: an assay system for chemostimulation. | a new system for evaluating the responses of miracidia to chemostimulants is described. the apparatus consists of a translucent plastic block with a center well and a hole in the edge leading to the well. one end of a glass tube, covered with a dialysis membrane, was inserted into the hole. experimental solutions to be tested were put into the tube and schistosoma mansoni miracidial behavior was observed in the well on the other side of the permeable membrane. miracidia were released near the me ... | 1975 | 1127550 |
| genetic studies on variation in infectivity of schistosoma mansoni. | biomphalaria glabrata snails of known genetic susceptibility types were exposed to miracidia from 2 strains of schistosoma mansoni differing in infectivity.. individual snails were exposed to single miracidia and penetration observed. snails of a genetic type susceptible to both parasite strains served as controls, while snails of a genetic type susceptible to one parasite strain but relatively refractory to the other served as test snails to demonstrate the difference in parasite infectivity. ... | 1975 | 1127551 |
| genetic factors in susceptibility of biomphalaria glabrata for different strains of schistosoma mansoni. | biomphalaria glabrata selected for genetic differences in susceptibility to infection with a puerto rican strain of schistosoma mansoni were exposed to miracidia of a strain of s. mansoni from st lucia. the st lucian strain was less infective than the puerto rican. results suggested that in snails susceptible to the puerto rican s. mansoni differences in susceptibility to the st lucian straing were determined by a single gene, with insusceptibility dominant. | 1975 | 1128925 |
| [ammonium- and urea concentration in the hemolymph of biomphalaria glabrata infected with schistosoma mansoni]. | | 1975 | 1130133 |
| the encapsulation process in biomphalaria glabrata experimentally infected with the metastrongylid angiostrongylus cantonensis: light microscopy. | | 1975 | 1158554 |
| the effect of some biological and physical factors on infection of biomphalaria glabrata with angiostrongylus cantonensis. | several biological and physical factors which may influence infection of biomphalaria glabrata snails with the first stage larvae of angiostrongylus cantonensis were studied. these factors were: the size of snails, the number of first stage larvae to which snails were exposed, the age of larvae, individual exposure compared with mass exposure of snails, the length of exposure period and the effect of temperature and light. the results showed that young snails, 2 mm in diameter, became infected w ... | 1975 | 1189582 |
| the suitability of several aquatic snails as intermediate hosts for angiostrongylus cantonensis. | sixteen species of aquatic snails of four families were tested by quantitative technique under standardized conditions for their suitability as intermediate hosts for angiostrongylus cantonensis. these species were the planorbid snails biomphalaria glabrata, biomphalaria alexandrina, planorbis planorbis, planorbis intermixtus, bulinus truncatus, bulinus contortus, bulinus africanus, bulinus tropicus and helisoma sp.; the lymnaeid snails lymnaea natalensis, lymnaea tomentosa, lymnaea stagnalis, a ... | 1975 | 1189583 |
| studies on resistance in snails: a specific tissue reaction to echinostoma lindoense in biomphalaria glabrata snails. | | 1975 | 1201894 |
| studies on resistance in snails: specific resistance induced by irradiated miracidia of echinostoma lindoense in biomphalaria glabrata snails. | | 1975 | 1201896 |
| the encapsulation process in biomphalaria glabrata experimentally infected with the metastrongylid angiostrongylus cantonensis: enzyme histochemistry. | | 1975 | 1206232 |
| [isolation and partial study of an anti-hemoglobine precipitine in "biomphalaria glabrata" (author's transl)]. | a protein (pahb) with a precipiting capacity with regard to normal and pathological human hemoglobin as well as horse and hen hemoglobin has been separated on immunoadsorbent from hemolymph of biomphalaria glabrata. the joining of pahb and hemoglobin takes place at the level of the polypeptidic chain. a reconnaissance of the spatial structure of the globin seems to exist. the absence of heme does not lead to a decrease in the intensity of the reaction. the coefficient of the sedimentation of pah ... | 1975 | 1211880 |
| [experimental schistosomiases. i. study of s. mansoni fecondity as regards to its adaptation to different biomphalaria glabrata strains (author's transl)]. | we compared the infestation of different strains of b. glabrata from brasil (recife). guadeloupe, martinique and porto-rico with 6 to 8 miracidia of s. mansoni (from recife. we noted the four following points: 1. the planorbid snails from martinique and guadeloupe had a low resistance to infestation. 2. the guadeloupean snails showed the lesser rate of positivity and the lower medium amount of emitted cercaries but, in the four strains of snails, the level of the issued cercaries is quite the sa ... | 1975 | 1221915 |
| [cell culture of snails. their use in the study of immunologic host-parasite relationships in schistosomiasis]. | the host-parasite relationship between schistosoma mansoni and the snail biomphalaria glabrata is so complex that its experimental study needs some particularly working methods: for instance molluscan organs and tissue's cultures. in the experiment described we report that digestive gland's cells cultures were grown on synthetic cultural medium. this one contained a physiological salt solution and a basal nutrient medium consisting of foetal calf serum, chicken embryo extract and amino-acids. in ... | 1975 | 1243880 |
| intramolluscan trematode antagonism in a genetically susceptible strain of biomphalaria glabrata. | | 1976 | 1262123 |