Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| a cytological study of the ovary of rhodnius prolixus. i. the ontogeny of the follicular epithelium. | 1972 | 4552847 | |
| a comparison between the dermal glands in two insects rhodnius prolixus (hemiptera) and calpodes ethlius (lepidoptera). | 1972 | 4111713 | |
| the ultrastructure of neurons with both a motor and a neurosecretory function in the insect, rhodnius prolixus. | 1973 | 4273271 | |
| the germfree culture of three species of triatominae: triatoma protracta (uhler), triatoma rubida (uhler) and rhodnius prolixus stål. | 1973 | 4586544 | |
| the effect of the persistence of juvenile hormone mimics on their activity on rhodnius prolixus. | 1973 | 4581430 | |
| the timing of meiosis and dna synthesis during spermatogenesis in the triatomine rhodnius prolixus stal. | 1973 | 4593650 | |
| an experimental approach to the study of drugs in invertebrate systems. i. mass feeding of rhodnius prolixus stål (hemiptera, reduviidae). | 1973 | 4572200 | |
| 1. inheritance of the ability to transmit t. cruzi in rhodnius prolixus. 2. natural and acquired inhibitory factors in animal sera against t. cruzi in culture. 3. ability of all immature and mature stages of rhodnius prolixus to infection with t. cruzi. | 1973 | 4591209 | |
| rhodnius prolixus: inheritance of the ability to transmit schizotrypanum cruzi. | 1973 | 4593648 | |
| transmission of trypanosoma cruzi by rhodnius prolixus. | 1973 | 4593649 | |
| trypanosome density in the rectum of rhodnius prolixus infected with t. cruzi. | 1973 | 4594459 | |
| [the cycle of intestinal protease activity in larval and adult rhodnius prolixus (hemiptera, reduviidae)]. | 1973 | 4612636 | |
| trypanosoma cruzi infections in rhodnius prolixus refed on different hosts. | 1973 | 4201999 | |
| [findings of rhodnius prolixus eggs naturally parasitized by microhymenoptera]. | 1973 | 4202000 | |
| studies on the development of rhodnius prolixus and the effects of its symbiote nocardia rhodnii. | 1974 | 4208144 | |
| the effect of abnormal human hemoglobin (hbs) on the blood meal size of the hematophagous bug rhodnius prolixus. | 1974 | 4617277 | |
| potassium-induced release of the diuretic hormones of rhodnius prolixus and glossina austeni: ca dependence, time course and localization of neurohaemal areas. | 1974 | 4153437 | |
| partial characterization of a proposed antigonadotropin from the ovaries of the insect rhodnius prolixus stål. | 1974 | 4476672 | |
| the response of the follicle cells of rhodnius prolixus to juvenile hormone and antigonadotropin in vitro. | 1974 | 4611604 | |
| isolation and purification of the diuretic hormone from rhodnius prolixus. | 1974 | 4606696 | |
| changes in the concentration of free amino acids in the haemolymph of rhodnius prolixus during the fifth instar. | 1974 | 4833119 | |
| [natural and experimental variations in blood proteins in the female rhodnius prolixus (stal) reduviid hemipterous insect]. | 1974 | 4592655 | |
| [blockade of egg laying and egg feritily of rhodnius prolixus influenced by cholretetracycline]. | 1974 | 4618619 | |
| distribution of lipid in the lamellate endocuticle of rhodnius prolixus (hemiptera). | the lamellate appearance of the cuticle in the abdomen of the rhodnius larva conforms to the conception of bouligand in being an optical artifact which results from the spiral arrangement of successive layers of oriented fibrils. but superimposed on this structure is an actual lamination of bound lipid with the same spacing. the relation of the lipid layers to the optical lamination changes with the aspect from which the system is viewed. there must therefore be a cyclical secretion of lipid by ... | 1975 | 1107337 |
| differences in the concentration of free amino acids in the haemolymph of adult male and female rhodnius prolixus. | 1975 | 1183193 | |
| the role of adenosine 3':5'-cyclic monophosphate in relation to the diuretic hormone of rhodnius prolixus. | 1975 | 171312 | |
| two actions of juvenile hormone on the follicle cells of rhodnius prolixus stal. | 1975 | 1098753 | |
| insect peripheral nerves: accessibility of neurohaemal regions to lanthanum. | during incubation in vivo, exogenously applied ionic lanthanum comes to surround the numerous neurosecretory terminals which are found lying within or immediately beneath the acellular neural lamella ensheathing the nerves from fifth instar and adult specimens of rhodnius prolixus. the lanthanum does not penetrate beyond the cellular perineurium, which completely surrounds the non-neurosecretory axons in these nerves and constitutes a form of 'blood-brain barrier'. in some cases, however, lantha ... | 1975 | 1141392 |
| feeding in rhodnius prolixus: increasing sensitivity to atp during prolonged food deprivation. | 1975 | 1095659 | |
| [morphogenic discontinuities in epidermal cell populations of arthropods, rhodnius prolixus stål, periplaneta americana l, studied by scanning electron microscope]. | several populations of arthropodian epidermal cells show modifications of polar and structural pattern features. modifications may be gradual or the opposite, localised in distant or adjacent regions. morphogenetical discontinuities are defined where adjacent regions present a modification pattern without intermediate types. | 1975 | 807372 |
| [comparison of the effects of ecdysone and ecdysterone on moulting in the insect rhodnius prolixus (stål) (hemiptera ruduviidae)]. | the allatectomy in the 4th instar larvae of rhodnius prolixus stops moulting in 93 per cent of the cases. a different type of moulting results in these larvae after the injection of ecdysone or ecdysterone. the ecdysterone induced a rapid apolysis with a new adultoid cuticle tending towards larval but with the ecdysone, apolysis occurred at normal times and the cuticle secreted was strongly adultoid. | 1975 | 807349 |
| [feeding of rhodnius prolixus in the laboratory]. | 1975 | 829020 | |
| proceedings: limited survival of trypanosoma (schizotrypanum) dionisii in rhodnius prolixus. | 1975 | 766324 | |
| ultrastructure of neurosecretory cells in the pars intercerebralis of rhodnius prolixus (hemiptera). | six neuron types are distinguished in the pars intercerebralis of the starved fifth instar of rhodnius prolixus. all neuron types contain electron dense secretory granules derived from golgi complexes which are of characteristic size and morphology in each type. the neuron types are not thought to represent stages in a secretory cycle. the variety of neuron types described is related to that revealed by staining sections of the same cells with paraldehyde fuchsin. active synthesis of neurosecret ... | 1975 | 47198 |
| improved rearing of symbiont-free and infected rhodnius prolixus using rabbit-ear warmers and simple microbiological isolators. | 1975 | 1107660 | |
| reproduction, structure and host specificity of trypanosoma (herpetosoms) tamiasi sp. n. from the eastern chipmunk, tamias striatus. | trypanosoma (herpetosoma) tamiasi sp. n. is described from blood and organs of the eastern chipmunk, tamias striatus, and the least chipmunk, eutamias minimus. in experimentally infected tamias striatus and e. minimus, trypanosoma tamiasi reproduced by equal binary fission in the trypo-, sphaero-, epi-, or amastigote form, mainly in lymphoid organs. trypomastigotes developed from amastigotes through epimastigotes, or from sphaeromastigotes, mainly in the same organs. the mean lengths of body ... | 1975 | 1117439 |
| chagas' disease in el salvador. | several studies on chagas' disease in el salvador have supplied important epidemiologic information, including the following: (1) rates of house infestation by triatomid vectors have ranged from 26.3 per cent to 100 per cent in various localities studied, higher rates being found in rural than in urban areas. (2) triatoma dimidiata and rhodnius prolixus are the two vectors of t. cruzi in el salvador, with t. dimidiata predominating in localities at elevations above 600 meters and r. prolixus in ... | 1975 | 808244 |
| a comparison of rhodnius prolixus, triatoma infestans and panstrongylus megistus in the xenodiagnosis of a chronic trypanosoma (schizotrypanum) cruzi infection in a rhesus monkey (macaca mullatta). | fifth instar rhodnius prolixus, triatoma infestans and panstrongylus megistus were fed on a rhesus monkey (macaca mullatta) with a chronic infection of peru strain trypanosoma cruzi and examined 30 days later for the presence of trypanosomes in the rectum. no correlation could be demonstrated between either blood meal size or sex and the subsequent development of a rectal infection with t. cruzi. as t. infestans and p. megistus were more highly infected than r. prolixus in terms of both percenta ... | 1975 | 814658 |
| inheritance of susceptibility of trypanosoma cruzi infection in rhodnius prolixus. | 1976 | 819845 | |
| [wild reservoirs and vectors of cruzi. lx. attempts to cross rhodnius prolixus stal, 1859 and rhodnius neglectus lent, 1954 (hemiptera, reduviidae)]. | 1976 | 819981 | |
| excretion of alkaloids by malpighian tubules of insects. | nicotine is transported at high rates by malpighian tubules of larvae of manduca sexta, pieris brassicae and rhodnius prolixus and the transport persists in the absence of alkaloid from the diet. in the fluid-secreting portion of rhodnius tubules this transport is not coupled to ion transport, nor is it dependent on the physiological state of the animal. the transport, which can occur against a steep electrochemical gradient, shows saturation kinetics with a maximal rate of 700 pmol. min-1 per t ... | 1976 | 932618 |
| rhodnius prolixus and its symbiotic actinomycete: a microbiological, physiological and behavioural study. | 1976 | 12514 | |
| trypanosoma cruzi: effects of rhodnius prolixus extracts on in vitro development. | 1976 | 775590 | |
| the inheritance of radiation induced semi-sterility in rhodnius prolixus. | eggs from crosses of 40 adult male r. prolixus irradiated with 6k rad gamma-rays with normal females had a mean fertility of 23.9%, only 2 crosses being completely sterile. the 86 f1 progeny of both sexes, when outcrossed with normal mates, had a mean egg fertility of 12.6;, and 43 of these matings were completely sterile. twenty-eight "f2" bugs reared from f1 x normal crosses were mated with normal partners and had a mean fertility of 44.6%, 6 of them being fully fertile, a reversal towards nor ... | 1976 | 793795 |
| ecdysterone-induced mortality and inhibition of feeding in diapausing rhodnius prolixus stal. | 1976 | 782905 | |
| further studies on potencies of nucleotides as gorging stimuli during feeding in rhodnius prolixus. | 1976 | 781143 | |
| the action of juvenile hormone on follicle cells of rhodnius prolixus in vitro: the effect of colchicine and cytochalasin b. | 1977 | 892420 | |
| high-molecular-weight forms of diuretic hormone from rhodnius prolixus [proceedings]. | 1977 | 913782 | |
| some lipid classes in the fat-body of rhodnius prolixus. | 1977 | 614757 | |
| sequence of ultrastructural changes induced by activation in the posterior neurosecretory cells in the brain of rhodnius prolixus with special reference to the role of lysosomes. | the posterior neurosecretory cell (pnc) group in the brain of rhodnius prolixus is composed of five ultrastructurally identical cells. the pnc were examined in the unfed fifth instar and at seven stages (from 15 min to 14 days) after activation was initiated by feeding. each stage examined revealed successive changes in morphology which can be related to the synthesis, maturation, storage and transport of neurosecretory material. it is suggested, in particular, that the lysosomal system (dense b ... | 1977 | 337573 |
| control of protease secretion in the intestine of fifth instar larvae of rhodnius prolixus. | 1977 | 323372 | |
| observations on the feeding and defecation patterns of three triatomine species (hemiptera: reduviidae). | a comparative laboratory study of feeding and defecation behavior of three species of tritomines (rhodnius prolixus, triatoma infestans and t. dimidiata) indicated evident differences among the species and among the different stages of same species. time required for a full blood meal was related to the size of the specimen. insects required an average of 11-28 min for engorgement although some finished within 10 min. t. dimidata frequently interrupted the act of feeding, a probable explanation ... | 1977 | 16468 |
| comparison of infectivity of trypanosoma cruzi blood stream trypomastigotes and metacyclic trypomastigotes from rhodnius prolixus. | four strains of trypanosoma cruzi (y, bg, m and peru) retain their ability to infect rhodnius prolixus and to produce virulent infections in mice for from 12 to 39 years. about 60 or more metacyclic trypomastigotes were consistently lethal to mice. the mean number of metacyclics per bug ranged from 1.2 to 17.3 x 10(3). comparative studies of virulence of metacyclics and blood trypomastigotes showed the blood forms to be slightly more virulent. the route of injection was shown to be more signific ... | 1977 | 16470 |
| [spontaneous infection of marmoset-monkeys (sanguinus oedipus) with a trypanosoma cruzi-like-strain, springer 1975. isolation and identification (author's transl)]. | a trypanosoma cruzi-like strain was isolated from marmoset monkeys originating from columbia. the frequency of affected monkeys was up to 32.7%. the parasite density was 10-40 trypomastigote forms per mililiter. monkeys, rats, mice and other small rodentia were found to be susceptible. clinical symptoms or histopathological findings could not be acertained with these trypanosomes even after a 2 1/2 year observation period. the strain behaved as an apathogen in experimental animals. the parasitae ... | 1977 | 416623 |
| hematophagous insects as vectors for frog trypanosomes. | experimental infections of three hematophagous arthropods (rhodnius prolixus, aedes aegypti, and culex pipiens) with a trypanosome of the trypanosoma rotatorium complex found in the frogs hyla crepitans and leptodactylus insularum revealed that a. aegypti is a good host for the flagellate; the course of development in the intestinal tract of the mosquito is described from 15 minutes to 168 hours. c. pipiens showed only low intestinal infections and r. prolixus did not permit development of the p ... | 1977 | 615322 |
| influence of the stage of infection of trypanosoma cruzi in guinea-pigs on infectivity to rhodnius prolixus. | 1977 | 322624 | |
| assembly pheromone of triatoma infestans and rhodnius prolixus nymphs (hemiptera: reduviidae). | 1977 | 328883 | |
| [effect of parasite density of ooencyrtus trinidadensis (chalcidoidea, encyrtidae), an endophagus parasite of eggs of rhodnius prolixus, vector of chagas' disease in venezuela]. | 1977 | 331437 | |
| a comparative study of the behavior of venezuelan and brazilian strains of trypanosoma (schizotrypanum) cruzi in the venezuelan invertebrate host (rhodnius prolixus). | 1977 | 339313 | |
| the number of trypomastigotes of trypanosoma cruzi, required to infect rhodnius prolixus. | 1977 | 341267 | |
| a microhymenopteran parasite of eggs of psammolestes arthuri (hemiptera: reduviidae) and observations of experimental parasitism of eggs of rhodnius prolixus (hemiptera: reduviidae). | 1978 | 344883 | |
| [demonstration of an enzyme inhibiting coagulation of blood ingested by the blood-sucking insect, rhodnius prolixus (heteroptera, reduviidae)]. | a new fibrinolytic enzyme, "the prolixase", was isolated and purified from the haemolymph of rhodnius prolixus. the mode of action of the enzyme was studied and compared to that of extracts from salivary glands and midgut of the insect. it appears that the prolixase is involved in inhibiting the coagulation of the blood ingested by rhodnius during its blood meal. the mode of action of the enzyme in this phenomenon is discussed. | 1978 | 747454 |
| triatomines as experimental vectors of trypanosomes of asian monkeys. | systematic surveys of the wild macaques of south asia by blood culture resulted in the discovery that trypanosomiasis is enzootic in the simians of indonesia, malaysia, india, and thailand. the isolates obtained differ in morphology, metabolism, and ability to multiply in arthropods. following this discovery, interest focused on possible transmissions of these trypanosomiases. laboratory-reared and wild-caught insects were studied to determine which are satisfactory intermediate hosts and potent ... | 1978 | 417639 |
| comparative xenodiagnosis with three triatomine species of different hosts with natural and experimental chronic infections with trypanosoma (schizotrypanum) cruzi. | simultaneous xenodiagnosis was made of 29 patients with chronic chagas's disease, six naturally infected opossums (didelphis azarae) and of a rhesus monkey with an experimental chronic infection with trypanosoma (schizotrypanum) cruzi (peru strain). patients and opossums were from an endemic area in the state of bahia, brazil, where panstrongylus megistus is the sole domiciliary vector of the disease to man. various instars of p. megistus triatoma infestans and rhodnius prolixus were used. the p ... | 1978 | 416525 |
| purification and characterization of a sulfhydryl-dependent protease from rhodnius prolixus midgut. | 1978 | 28087 | |
| effect of diet viscosity on the operation of the pharyngeal pump in the blood-feeding bug rhodnius prolixus. | 1. the rate of pumping and total number of pump strokes was recorded whilst rhodnius prolixus fed on measured amounts of artificial diets. 2. increasing the viscosity of the diet caused a decline in both the frequency with which the pharyngeal pump operates and the average stroke volume of the pump. 3. in 5th-instar rhodnius, the stroke volume tends toward a maximum value of about 60 nl at viscosities lower than about 3 cp. 4. feeding rates (volume per unit time) agree with poiseuille's law at h ... | 1979 | 11799696 |
| an unusual cell surface modification: a double plasma membrane. | the occurrence of an unusual double plasma membrane structure is reported; it has been studied in conventional thin sections, after lanthanum-impregnation and with freeze-fracturing. this modification of the plasmalemma is found where the luminal cell membrane (i membrane) of gut microvilli in the haematophagous insect, rhodnius prolixus, is surrounded by a second, outer membrane (o membrane), the 2 separated from one another by a highly regular i-o space of about 10 nm. lanthanum impregnation r ... | 1979 | 528589 |
| changes in hormone activity of single neurosecretory cell bodies during a physiological secretion cycle. | single neurosecretory cell bodies were dissected from the ventral ganglionic mass of rhodnius prolixus, lysed in distilled water, and bioassayed for diuretic hormone (dh) activity on isolated malpighian tubules. dh was found in a least 10 somata within the ganglion; electron micrographs of isolated cells show a large population of elementary neurosecretory granules. quantitative measures of hormone activity were made by bioassaying somata from unfed 5th instar larvae, and at the following times ... | 1979 | 421131 |
| ecdysone, juvenile hormone and oögenesis in rhodnius prolixus. | 1979 | 387882 | |
| domiciliary biting frequency and blood ingestion of the chagas's disease vector rhodnius prolixus ståhl (hemiptera: reduviidae), in venezuela. | demolition of a rural house in the state of cojedes, venezuela, provided a collection of 7.934 rhodnius prolixus of which a random sample of 1,415 was weighed within 48 hours. the field weights, coupled with laboratory information of weight loss (in %) with time, average blood ingestion and meal size sufficient to promote moulting, were used to estimate biting rate under domiciliary conditions. the results show that in this particularly highly infested house, the r. prolixus population bites, on ... | 1979 | 112731 |
| a comparison of challenge with trypanosoma cruzi blood-stream trypomastigotes and metacyclic trypomastigotes from rhodnius prolixus in mice immunized with killed antigens. | groups of cd-1 mice were immunized with vaccines prepared from freeze-thawed or ultra-sonicated epimastigotes, blood trypomastigotes, or "plasma antigen", of trypanosoma cruzi strains y, m1 and tulahuen. the mice were challenged by the injection of blood stream trypomastigotes obtained from mice, or of metacyclic trypomastigotes harvested from the rectum of rhodnius prolixus. both challenges induced virulent infections in control mice. blood-stream trypomastigotes killed mice more rapidly than t ... | 1979 | 122124 |
| insect axopods. | using the elctron microscope we have found axopods, a cell organelle previously undescribed in multicellular animals, in the lower malpighian tubule of the insect. rhodnius prolixus. the axopods, which are 0.2 to 0.8 micrometer in diameter and 10 or more micrometer in length, derive from the luminal surface of the tubule and contain an array of 1 to about 46 microtubules each. these microtubules arise within the cell near the cell junctions or near clumps of mitochondria. uric acid crystals whic ... | 1979 | 370127 |
| diuresis from left atrial receptors: effect of plasma on the secretion of the malpighian tubules of rhodnius prolixus. | 1. stimulation of left atrial receptors by distension of a balloon in the lumen of the left atrium of anaesthetized dogs was shown to result in an increase in urine flow. plasma samples obtained from these dogs during control periods and during periods of stimulation were applied to the malpighian tubules of rhodnius prolixus. 2. it was found that the tubules suspended in test plasma secreted at a significantly lower rate than those suspended in control plasma. 3. these differences were also evi ... | 1979 | 383951 |
| larval competition between telenomus costalimai (hymenoptera: scelionidae) and ooencyrtus trinidadensis venatorius (hymenoptera: encyrtidae) after simultaneous oviposition in rhodnius prolixus eggs (hemiptera: reduviidae). | 1979 | 396374 | |
| evidence of microfilament-associated mitochondrial movement. | the mitochondria in the lower malpighian tubule of the insect rhodnius prolixus can be stimulated by feeding in vivo and by 5-hydroxytryptamine in vitro, to move from a position below the cell cortex to one inside the apical microvilli. during and following their movement into the microvilli, the mitochondria are intimately associated with the microfilaments of the cell cortex and microvillar core bundle. bridges approximately 14 nm in length and 4 nm in diameter are observed connecting the micr ... | 1979 | 397369 |
| [action of insect development inhibitors on aedes aegypti l. mosquitoes and on rhodnius prolixus stal. but. ii. the juvenile activity of metoprene and structurally close compounds]. | 1979 | 353473 | |
| effects of sublethal dose exposure to dieldrin on rhodnius prolixus (hemiptera: reduviidae) under laboratory conditions. | the effects of a sublethal dose of dieldrin (7.2 x 10(-5) g/day) were evaluated on oxygen consumption, survivorship, moulting and reproduction of rhodnius prolixus. no difference was found in oxygen consumption between treated and control male insect. survivorship proved to be very much affected by the sublethal exposure, but this was strongly dependent on the feeding stage of the individuals. moulting times were prolonged by 2 to 3 days depending on the instar, but the number of individuals tha ... | 1980 | 6104425 |
| the penetration of the salivary glands of rhodnius prolixus by trypanosoma rangeli. | ultrastructural studies of the mechanism of penetration of the salivary gland of the reduviid bug rhodnius prolixus by trypanosoma rangeli showed that trypanosomes from the haemocoele penetrate the outer "membranes" of the gland flagellum foremost, disrupting the inner layers, to pass between the muscle cells to reach the gland cell basement membrane. this latter is also penetrated flagellum foremost, the parasite invaginating the gland cell plasmalemma beneath, to create a vacuole in which the ... | 1980 | 6994382 |
| [resistance to fast in venezuelan triatomidae (hemiptera, reduviidae). i- rhodnius prolixus stal]. | 1980 | 7001606 | |
| early invasion of trypanosoma rangeli into the haemolymph of rhodnius prolixus. | 1980 | 7001694 | |
| role of angiotensin ii and bradykinin in the diuresis caused by stimulation of atrial receptors. | the diuretic response to stimulation of left atrial receptors, by distending balloons located either at the pulmonary vein-left atrial junctions or in the body of the left atrium, was studied during blockade of the generation of angiotensin ii using a continuous infusion of angiotensin converting enzyme inhibitor, sq 14,225, in anaesthetized dogs. despite blockade of angiotensin conversion, known also to potentiate the activity of bradykinin, a diuretic response was obtained in each dog; the res ... | 1980 | 7005924 |
| [ultrastructure of the antennal sensillae of the bug, rhodnius prolixus (hemiptera, reduviidae)]. | on the antenna of the bug r. prolixus we found numerous receptors which can be classified into three categories: mechanoreceptors (sensilla chaetica), olfactory (sensillae trichodea, basiconica and caeloconica) and gustatory (sensilla trichodea) receptors. the number, size and distribution on the antenna of each type have been recorded. a description of each of these sense organs is given. tactile hairs are present on all of the antennal segments while thin-walled chemoreceptors are limited to s ... | 1980 | 7007992 |
| detection of trypanosoma rangeli by salivation of infected rhodnius prolixus on glass slides. | 1980 | 7008724 | |
| trypanosoma cruzi development is independent of protein digestion in the gut of rhodnius prolixus. | 1980 | 7012289 | |
| effects of a mammalian cholesterol biosynthesis inhibitor on adipocyte ultrastructure and metamorphosis in rhodnius prolixus (hemiptera). | a potent inhibitor of cholesterol biosynthesis in rodents [bmva; 5-(4-biphenylyl)-3-methylvaleric acid] inhibits metamorphosis of 4th stage larvae of the blood-sucking bug rhodnius prolixus. | 1980 | 6998718 |
| electrical activity of neurosecretory axons from the brain of rhodnius prolixus: relation of changes in the pattern of activity to endocrine events during the moulting cycle. | ongoing electrical activity was recorded from the axons of neurosecretory cells from the brain of 5th instar rhodnius prolixus throughout the moulting cycle. dramatic changes in both the frequency and pattern of electrical activity occur at specific times during the cycle, enabling the timing of release of neurohormones from the brain to be inferred. the level of transport of stainable secretion appears to be closely coupled to the electrical activity at all times. activity is low in unfed rhodn ... | 1980 | 7378760 |
| the development of the female accessory gland in the insect rhodnius prolixus. | the specialized cell types and two distinct regions of the adult rhodnius prolixus cement gland develop from a simple pseudostratified epithelial tube during the 20-22 days of the fifth stadium. feeding initiates the first phase, proliferation. cells round up and divide tangentially to the lumen. following the proliferation phase, differentiative mitoses occur and differentiation, resulting in secretory units (consisting of a ductule, gland cell and cuticular lining), ensues in the distal region ... | 1980 | 7010677 |
| development and cellular differentiation of an insect telotrophic ovary (rhodnius prolixus). | differentiation events accompanying the larval-adult ovarian transformation in rhodnius prolixus can be divided into three phases: proliferative phase (unfed to 3 days post-feed or dpf), early differentiation phase (9-15 dpf) and late differentiation phase (16 dpf to moult at 21 dpf). ovarioles remain morphologically larval until feeding initiates development. the unfed ovariole contains germ cells surrounding a central trophic core region with the 'germarial lumen' occupying the basal region of ... | 1980 | 7010676 |
| the ultrastructure of the female accessory gland, the cement gland, in the insect rhodnius prolixus. | the cement gland of rhodnius prolixus is an epidermally derived tubular gland consisting of a distal synthetic region and a proximal muscular duct region. the synthetic region consists of numerous secretory units joined to a central chitinous duct via cuticular ductules. proteinaceous secretion, synthesized by the goblet-shaped secretory cell, passess through the delicate cuticular lattice of a ductule-end apparatus and out through fine ductules to the central duct. secretory cells are rich in r ... | 1980 | 7001676 |
| effects of ecdysone on the metamorphosis and ecdysis prevention induced by precocene ii in rhodnius prolixus. | 1981 | 7026357 | |
| platelet antiaggregating activity in the salivary secretion of the blood sucking bug rhodnius prolixus. | 1981 | 7016577 | |
| development of nurse cell-oocyte interactions in the insect telotrophic ovary (rhodnius prolixus). | the establishment of reorganization of intercellular bridges during larval-adult ovarian differentiation is the basis of the syncytial nature of the adult hemipteran telotrophic ovary. the formation, in the late differentiation phase, of groups of closely arranged nurse cell nuclei occupying a common cytoplasm results from membrane fusions. oocyte-oocyte intercellular bridge systems later are modified to form the trophic cords. the trophic core, which undergoes a restructuring during the late di ... | 1981 | 7031984 |
| an energy budget for rhodnius prolixus (hemiptera: reduviidae) under laboratory conditions. | 1981 | 7021833 | |
| 5-hydroxytryptamine-stimulated mitochondrial movement and microvillar growth in the lower malpighian tubule of the insect, rhodnius prolixus. | rapid initiation of ion transport occurs in the lower malpighian tubule of the insect rhodnius prolixus following feeding in vivo or stimulation with 5-hydroxytryptamine (5-ht) in vitro. using the electron microscope, we have conducted a morphometric analysis of cells in the lowest one-third of the lower tubule, demonstrating that 5-ht also induces mitochondrial movement and microvillar growth simultaneously with, but independent of, the onset of ion transport. mitochondria move from a position ... | 1981 | 7031069 |
| lectins of distinct specificity in rhodnius prolixus interact selectively with trypanosoma cruzi. | lectins of different activities were found in the crop, midgut, and hemolymph of the insect rhodnius prolixus. these were not specific for n-acetyl-d-mannosamine, alpha-n-acetyl-d-galactosamine, and alpha- and beta-galactose, respectively. lectin receptors were detectable in epimastigote but not in trypomastigote forms of trypanosoma cruzi, a protozoan parasite of the insect and of humans. | 1981 | 7006082 |
| experimental infections in venezuelan lizards by trypanosoma cruzi. | virulent trypomastigotes of the y strain of trypanosoma cruzi were administered to tropidurus hispidus, ameiva ameiva, cnemidophorus lemniscatus, polychrus marmoratus, and phyllodactylus ventralis (sauria). intraperitoneal and subcutaneous inoculations of lizards with mouse blood or with feces of infected rhodnius prolixus (reduviidae, triatominae), as well as forced ingestion of triturated rhodnius, produced no parasitaemias detectable either directly or by xenodiagnosis, while control mice bec ... | 1981 | 6115559 |
| diuresis from stimulation of left atrial receptors: adh and the malpighian tubules of rhodnius prolixus. | stimulation of left atrial receptors causes a diuresis partly through a blood borne agent. malpighian tubules of rhodnius prolixus can detect a blood borne agent during the diuresis. it has been suggested that the agent is adh but this is in dispute. in the present investigation, vasopressin (1-300 mu i.u. cm-3) was found to have no effect on malpighian tubule secretion when added to plasma, rhodnius ringer and rhodnius ringer + 5-ht. in addition, it was shown that incubation with sodium thiogly ... | 1981 | 6910734 |
| nurse cell-oocyte interaction in the telotrophic ovarioles of an insect, rhodnius prolixus. | microinjection of intracellular tracers fluorescein, procion yellow, lucifer yellow and horseradish peroxidase unequivocally showed the syncytial structure of the tropharium and its interaction with the oocytes. the tropharium tip is a separate isolated compartment. finger-like nurse cell projections comprising the syncytial tropharium interact via gap junctions along their abutting membranes and also via large cytoplasmic continuities at the central trophic core. the trophic cords connecting th ... | 1981 | 7013152 |
| description of new fibrinolytic enzyme, isolated from the haemolymph of rhodnius prolixus stal (heteroptera reduviidae). | a new fibrinolytic enzyme, isolated from the haemolymph of rhodnius prolixus stal (heteroptera, reduviidae) has been discovered. this enzyme does not act by activating plasminogen to plasmin. however, the split products obtained with this new enzyme inhibit fibrin formation in normal plasma. this enzyme seems to act specifically on the proteins involved in blood coagulation. its origin has induced us to name it prolixase. | 1982 | 6762857 |
| [feeding preferences in 3 species of triatominae (hemiptera: reduviidae) in experimental conditions]. | feeding preferences of three species of triatomines (triatoma infestans, t. dimidiata, and rhodnius prolixus) on four vertebrate hosts (opposum, dog, chicken and toad) were studied in a specially designed cage during daylight (2 hours) and at night (14 hours). t. infestans and r. prolixus remained close to the host after feeding, while t. dimidiata wandered a short distance away, apparently for protection against preying by the host. r. prolixus showed the lightest values of ingestion in relatio ... | 1982 | 6763728 |