Publications

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antagonism of paryphostomum segregatum rediae to schistosoma mansoni sporocysts in the snail biomphalaria glabrata. 19676062083
estivation of biomphalaria glabrata (basommatophora: planorbidae). associated characteristics and relation to infection with schistosoma mansoni. 19676066227
labeling of biomphalaria glabrata and cercariae of schistosoma mansoni with radioselenium. 19685673655
some quantitative data on the laboratory and field infection of biomphalaria glabrata from jabuticatubas (state of minas gerais, brasil) by miracida of schistosoma mansoni. 19685679030
the reaction of australorbis glabratus (biomphalaria glabrata) to infection with schistosoma mansoni. 19685679657
intramolluscan stages of schistosoma mansoni in biomphalaria glabrata. 19695789090
the effect of sublethal doses of the molluscicide (n-tritylmorpholine) on the development of schistosoma mansoni in biomphalaria glabrata (say). 19695381131
histochemical and electron microscope observations on the reproductive tract of biomphalaria glabrata (australorbis glabratus), intermediate host of schistosoma mansoni. 19694191152
control of schistosomiasis in guayama and arroyo, puerto rico.in 1953, a programme to control schistosomiasis mansoni was started in guayama and arroyo, puerto rico, employing, first, chemical and, later, both biological and chemical methods to control biomphalaria glabrata, the snail host of schistosoma mansoni. sodium pentachlorophenate was the molluscicide, and an ampullarid snail, marisa cornuarietis, was used for biological control in ponds and reservoirs. in addition some chemotherapy was given to infected persons. the prevalence of intestinal schist ...19705309511
increased heart rate in biomphalaria glabrata parasitized by schistosoma mansoni. 19705449737
laboratory studies of the host-parasite relationship of schistosoma mansoni and biomphalaria glabrata from st lucia, west indies. 19705500111
[emergency circadian rhythm of cercariae (schistosoma mansoni-biomphalaria glabrata)]. 19715564021
bacteria in the "curative" effect of hemolymph of biomphalaria glabrata on schistosoma mansoni-infected mice. 19715093664
evaluation of two methods for the detection of schistosoma mansoni cercariae shed by biomphalaria glabrata. 19715105897
the arterial system of the planorbid snail biomphalaria glabrata. 19715112383
shell abnormalities in biomphalaria glabrata infected with schistosoma mansoni nd their significance in field transmission studies. 19715123699
schistosoma mansoni: respirometric and partial pressure studies in infected biomphalaria glabrata. 19715138652
glucose levels in the mollusc biomphalaria glabrata infected with schistosoma mansoni. 19715151913
schistosoma mansoni infection in biomphalaria glabrata: alterations in heart rate and thermal tolerance in the host. 19715151914
interference by unsusceptible aquatic animals with the capacity of the miracidia of schistosoma mansoni sambon to infect biomphalaria glabrata (say) under field-simulated conditions in st. lucia, west indies. 19724628268
the influence of temperature on the biology of biomphalaria glabrata (say), intermediate host of schistosoma mansoni on st. lucia, west indies. 19724634780
exposure of caged biomphalaria glabrata (say) to investigate dispersion of miracidia of schistosoma mansoni sambon in outdoor habitats in st. lucia. 19724641399
effects of some physico-chemical factors on the infection of biomphalaria glabrata (say) by miracidia of schistosoma mansoni sambon in st. lucia, west indies. 19724641400
effect of water depth on the infection of biomphalaria glabrata by miracidia of st. lucian schistosoma mansoni under laboratory and field conditions. 19724641401
schistosoma mansoni: alterations in total protein and hemoglobin in the hemolymph of infected biomphalaria glabrata. 19725016592
the effect of sublethal concentrations of the molluscicide triphenyl lead acetate on biomphalaria glabrata (say) and on the development of schistosoma mansoni in the snail. 19725038420
on the reported occurrence of an ecdysone-like steroid in the freshwater snail, biomphalaria glabrata (pulmonata; basommatophora), intermediate host of schistosoma mansoni. 19725039344
incorporation of 59 fe in the snail biomphalaria glabrata parasitized by schistosoma mansoni. 19725042055
rhythmic emergence of schistosoma mansoni cercariae from biomphalaria glabrata: control by illumination. 19725046888
genetic factors in the susceptibility of juvenile biomphalaria glabrata to schistosoma mansoni infection. 19725050093
an improved feeding procedure for biomphalaria glabrata. 19725057242
an investigation of the interactions of some factors influencing the infectivity of schistosoma mansoni miracidia to biomphalaria glabrata. 19734687432
ribeiroia marini: pathogenesis and larval trematode antagonism in the snail, biomphalaria glabrata. 19734706118
field studies on the population dynamics of biomphalaria glabrata, intermediate host of schistosoma mansoni on the west indian island of st. lucia. 19734706569
field studies on the transmission of schistosoma mansoni and on the bionomics of its intermediate host, biomphalaria glabrata, on st. lucia, west indies. 19734706570
field investigations on the effect of other aquatic animals on the infection of biomphalaria glabrata by schistosoma mansoni miracidia. 19734711664
location of biomphalaria glabrata (say) by miracidia of schistosoma mansoni sambon in natural standing and running waters on the west indian island of st. lucia. 19734732026
the effect of photoperiod inversion upon schistosoma mansoni cercarial emergence from biomphalaria glabrata. 19734741637
susceptibility of adult biomphalaria glabrata to schistosoma mansoni infection. 19734745234
primary cultures of embryonic cells from the snail biomphalaria glabrata. 19734745241
rhythmic emergence of schistosoma mansoni cercariae from biomphalaria glabrata: influence of the temperature. 19734755616
alterations in total serum proteins and protein fractions in biomphalaria glabrata parasitized by schistosoma mansoni. 19734761358
the effect of water temperature on the penetration and development of st. lucian schistosoma mansoni miracidia in local biomphalaria glabrata. 19734768714
[study of the susceptibility of biomphalaria glabrata from ourinhos (são paulo), to schistosoma mansoni from belo horizonte (minas gerais) and são josé dos campos (são paulo)]. 19734789392
[demonstration of cytoadherence properties of cells from the hemolymph of biomphalaria glabrata parasitized by schistosoma mansoni]. 19734122547
increased alkaline phosphatase in the tissues and hemolymph of the snail biomphalaria glabrata infected with schistosoma mansoni. 19734196899
the effects of desiccation and starvation upon the weight, histology and ultrastructure of the reproductive tract of biomphalaria glabrata, intermediate host of schistosoma mansoni. 19734346561
the effect of parasitism and starvation on carbohydrate reserves of biomphalaria glabrata. 19744819580
dynamics of populations of biomphalaria glabrata and the von foerster equation. 19744831921
14c uptake by schistosoma mansoni from biomphalaria glabrata exposed to 14c-glucose. 19744833175
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 ...19753698
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 ...19757114
schistosoma mansoni and biomphalaria glabrata: ultrastructural localization of enzymes with diaminobenzidine in larvae and host digestive glands. 1975235445
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 ...19751096483
transaminase levels in the digestive gland-gonad of schistosoma mansoni-infected biomphalaria glabrata. 19751109822
selective depletion of hemolymph proteins of biomphalaria glabrata infected with schistosoma mansoni. 19751117358
survival and cercaria production of brazilian biomphalaria glabrata and b. straminea infected with schistosoma mansoni. 19751117359
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 ...19751117376
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 ...19751127550
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. ...19751127551
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.19751128925
[ammonium- and urea concentration in the hemolymph of biomphalaria glabrata infected with schistosoma mansoni]. 19751130133
studies on resistance in snails: a specific tissue reaction to echinostoma lindoense in biomphalaria glabrata snails. 19751201894
studies on resistance in snails: specific resistance induced by irradiated miracidia of echinostoma lindoense in biomphalaria glabrata snails. 19751201896
[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 ...19751221915
[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 ...19751243880
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 ...1975810988
[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.1975811375
[antigenic structure of hemolymph and tissue extract of biomphalaria glabrata infested or not infested with schistosoma mansoni]. 1975819148
histologic and cytochemical observations of the effects of schistosoma mansoni on biomphalaria glabrata. 19751072600
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 ...19751084797
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.19761088517
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.1976948208
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 ...1976957039
effect of manganese on biomphalaria glabrata infected with schistosoma mansoni. 1976977981
[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.19761037435
intramolluscan trematode antagonism in a genetically susceptible strain of biomphalaria glabrata. 19761262123
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 ...197772142
[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.1977404049
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 ...1977303959
[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 ...1977595796
acid phosphatase in granulocytic capsules formed in strains of biomphalaria glabrata totally and partially resistant to schistosoma mansoni. 1977598965
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 ...1977605654
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 ...1977610026
studies on resistance in snails: interference by nonirradiated echinostome larvae with natural resistance to schistosoma mansoni in biomphalaria glabrata. 1977850073
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.1977859081
schistosoma mansoni: susceptibility reversal with age in the snail host biomphalaria glabrata. 1977862703
schistosoma mansoni, echinostoma lindoense, and paryphostomum segregatum: interference by trematode larvae with acquired resistance in snails, biomphalaria glabrata. 1977885213
schistosoma mansoni: temporary reduction of natural resistance in biomphalaria glabrata induced by irradiated miracidia of echinostoma paraensei. 1977891714
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, ...1977907052
[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 ...1977919681
[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.1977921190
[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 ...1977921191
[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 ...1977931320
[preliminary study of retriculate varieties of biomphalaria glabrata (say 1818) in comparison with pigmented and albino strains]. 1978653218
[selection in strains of biomphalaria tenagophila and biomphalaria glabrata for improving susceptibility to schistosoma mansoni]. 1978675140
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 ...1978684418
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 ...1978686244
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.1978695822
[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)]. 1978715359
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