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subarachnoide hemorrhage due to s. mansoni. a rare etiology.a case of schistosomiasis is described in a native of rio de janeiro, where, apart from infection of the intestines, a meningitic granulomatous reaction was provoked around eggs. intracerebral and subsequently subarachnoid hemorrhage occurred. the mode of infection is disucssed.197991674
[morbidity caused by schistosomiasis mansoni in brazil. i. study of 4,652 cases observed in rio de janeiro from 1960 to 1979]. 19827144549
[abundance and infection of biomphalaria glabrata with schistosoma glabrata in the state of rio de janeiro, brazil].to investigate the spatial distribution, abundance and natural schistosomiasis infection levels in the snail biomphalaria glabrata, the intermediate host of schistosoma mansoni in an area of the state of rio de janeiro, brazil.200111799465
[schistosomiasis mansoni and distribution of freshwater mollusks in natural bodies of water in niterói, rio de janeiro state, brazil].the authors report on the distribution of freshwater mollusks in niterói, rio de janeiro state, brazil, and notification of schistosomiasis cases in this municipality from 1995 to 2000. all breeding sites favorable to freshwater mollusks were surveyed, showing the following species: antillorbis nordestensis (lucena, 1954), biomphalaria straminea (dunker, 1848), biomphalaria tenagophila (orbigny, 1835), drepanotrema anatinum (orbigny, 1835), lymnaea columella say, 1817, melanoides tuberculatus (m ...200212244379
[socio-cultural and ethical factors involved in the diagnosis of schistosomiasis mansoni in an area of low endemicity].five annual parasitological surveys and one serological survey, respectively based on the kato-katz and free sedimentation methods and the western blot technique, were conducted in sumidouro, rio de janeiro, brazil, an endemic county for schistosomiasis. possible influences of the use of these methodologies on social, cultural, and ethical aspects of the study population were also evaluated. having the opportunity to choose the different techniques was a conclusive issue influencing participatio ...200515692642
the clinical course of idiopathic acute transverse myelitis in patients from rio de janeiro.the aim of this study was to describe the demographic, clinical and laboratory features of idiopathic acute transverse myelitis (iatm). patients with non-compressive atm receiving care at hospital da lagoa, rio de janeiro (brazil) between 2000 and 2008 were selected. of the 70 cases of acute myelopathies, the idiopathic form was identified in 41 following exclusion of the cases associated with systemic lupus erythematosus (n = 1), sjogren's syndrome (n = 1), herpes zoster (n = 1), cytomegaloviru ...201020127351
geospatial distribution of intestinal parasitic infections in rio de janeiro (brazil) and its association with social determinants.intestinal parasitic infections remain among the most common infectious diseases worldwide. this study aimed to estimate their prevalence and provide a detailed analysis of geographical distribution of intestinal parasites in the metropolitan region of rio de janeiro, considering demographic, socio-economic, and epidemiological contextual factors.201728273080
an ecological field study of the water-rat nectomys squamipes as a wild reservoir indicator of schistosoma mansoni transmission in an endemic area.small mammals are found naturally infected by schistosoma mansoni, becoming a confounding factor for control programs of schistosomiasis in endemic areas. the aims of this study were: to investigate the infection rates by s. mansoni on the water-rat nectomys squamipes during four years in endemic areas of sumidouro, state of rio de janeiro, using mark-recapture technique; to compare two diagnostic methods for schistosomiasis; and to evaluate the effects of the chemotherapy in the human infected ...200617308757
helminth communities of nectomys squamipes naturally infected by the exotic trematode schistosoma mansoni in southeastern brazil.the water rat nectomys squamipes is endemic in brazil and found naturally infected with schistosoma mansoni. helminth communities, their prevalences, intensity of infection and abundance in n. squamipes in an endemic area of schistosomiasis in the state of rio de janeiro, brazil were studied. four species of nematodes (physaloptera bispiculata, syphacia venteli, hassalstrongylus epsilon and litomosoides chagasfilhoi) were recovered in 85.3%, two trematodes (schistosoma mansoni and echinostoma pa ...200617125546
freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: v -- norte fluminense mesoregion.in this paper, the fifth of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the norte fluminense mesoregion from 2002 to 2003 are presented and revealed the occurrence of 19 species: antillorbis nordestensis; burnupia sp.; biomphalaria tenagophila; drepanotrema anatinum; drepanotrema cimex; drepanotrema depressissimum; drepanotrema lucidum; ferrissia sp.; gundlachia ticaga; gundlachia sp.; heleobia sp.; hebetancy ...200415486644
molecular identification of symbionts from the pulmonate snail biomphalaria glabrata in brazil.the icthyosporean, capsaspora owczarzaki, a known predator of schistosoma mansoni sporocysts in vitro, is more prevalent in laboratory-reared strains of the intermediate snail host, biomphalaria glabrata resistant to s. mansoni, than from the susceptible m line strain. we examined whether b. glabrata resistant to the nih-pr-1 strain of s. mansoni from 2 regions in brazil were also host to c. owczarzaki. symbiont presence was examined using hemolymph culturing and nested polymerase chain reaction ...200415357065
freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: iv - sul fluminense mesoregion.in this paper, the forth of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the sul fluminense mesoregion from 2000 to 2002 are presented and revealed the occurrence of 18 species: antillorbis nordestensis; biomphalaria glabrata; biomphalaria peregrina; biomphalaria straminea; biomphalaria tenagophila; drepanotrema anatinum; drepanotrema cimex; drepanotrema lucidum; ferrissia sp.; gundlachia ticaga; gundlachia sp ...200415273799
a comparative parasitologic study on biomphalaria glabrata snail and c3h/he mice infected with human and murine isolates of schistosoma mansoni derived from sumidouro, rio de janeiro, brazil.experiments were carried out to analyze the biological characteristics of two sympatric isolates of schistosoma mansoni derived from humans and murines in a low endemic transmission area (sumidouro county, state of rio de janeiro, brazil). sympatric reared-laboratory biomphalaria glabrata and c3h/he mice were used as experimental hosts. parameters assessed comprised: precercarial period, infectivity and mortality (snails), prepatent period, infectivity (percentage of cercariae maturation into ad ...200314595456
freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: iii--baixadas mesoregion.in this paper, the third of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the mesoregion baixadas from 2000 to 2002 are presented. twenty-two species, belonging to seven families, were found. as to the snail intermediate hosts of schistosoma mansoni, the most frequent species was biomphalaria tenagophila besides some new findings of biomphalaria straminea. no specimens were found harboring larval forms of s. ma ...200212426593
experimental evidence and ecological perspectives for the adaptation of schistosoma mansoni sambon, 1907 (digenea: schistosomatidae) to a wild host, the water-rat, nectomys squamipes brants, 1827 (rodentia: sigmodontinae).due to the semi aquatic habits and the overlap of the geographical distribution of the water-rat, nectomys spp., with schistosomiasis endemic areas, these wild rodents are very likely to acquire schistosoma mansoni infection in their daily activities. the role of the water-rat in the s. mansoni cycle would be substantiated if one could prove that these rodents acquire the parasite during their own activity time, a completely independent time schedule of human activities. to pursue this goal, we ...200212426586
freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: ii--centro fluminense mesoregion.during the course of a survey carried out from 2000 to 2001 in the centro fluminense mesoregion of the state of rio de janeiro 22 molluscan species were found. many of the records are new due to the dearth of previous studies. concerning the snail hosts of schistosoma mansoni, the most frequently encountered species was biomphalaria tenagophila, as it occurred in all the surveyed municipalities. there are new records of biomphalaria straminea and biomphalaria peregrina which is regarded as a pot ...200212219122
[freshwater snails of the campus of manguinhos, oswaldo cruz foundation, rio de janeiro, rj].a survey of freshwater gastropods of the campus of manguinhos, fundação oswaldo cruz, rio de janeiro, was carried out during the last two years aiming to compare the current species with those found at the beginning of this century. among 18 breeding sites in 880,000m2 of the surveyed area, 13 showed the following species: antillorbis nordestensis; biomphalaria glabrata; biomphalaria straminea; lymnaea columella; melanoides tuberculatus; physa cubensis; pomacea glauca and pomacea lineata. notabl ...200111460215
the parasitism of schistosoma mansoni (digenea-trematoda) in a naturally infected population of water rats, nectomys squamipes (rodentia-sigmodontinae) in brazil.schistosomiasis is a health problem in brazil and the role of rodents in maintaining the schistosome life-cycle requires further clarification. the influence of schistosoma mansoni on a population of nectomys squamipes was studied by capture-recapture (1st phase, from june 1991 to november 1995) and removal (2nd phase, from april 1997 to march 1999) studies at sumidouro, rio de janeiro, brazil. during both phases coproscopic examinations were performed. at the 2nd phase the rodents were perfused ...200010874720
prognosis of schistosomiasis mansoni patients infected with hepatitis b virus.a clinical study on the evolution of patients with schistosomiasis mansoni has been conducted since 1983 at the outpatient clinic of the infectious and parasitic disease service in the clementino fraga filho university hospital in rio de janeiro, brazil, comparing prevalence of positive tests for hbsag, anti-hbsag, and anti-hbc among patients infected with schistosoma mansoni coming from various regions of brazil and with different clinical forms of the disease. a non-significant predominance of ...19989921363
schistosoma mansoni sambon, 1907: comparative morphological studies of some brazilian strains.the morphology of schistosoma mansoni adult male worms from three strains which have been maintained in albino mice for several generations, was compared to a strain that has been isolated from the natural host nectomys squamipes (rodentia:muridae) captured in sumidouro (rio de janeiro state) and have been maintained in the same sylvatic rodent under laboratory conditions. total length of specimens, distance between suckers, the number of testes and extention of testes grouping were the taxonomi ...19958729755
[geographic distribution of triatoma vitticeps stal, 1859 (hemiptera, reduviidae) in the state of rio de janeiro, brazil]. 19863077191
study of a population of biomphalaria tenagophila (orbigny, 1835) and of schistosomiasis transmission in "alto da boa vista", rio de janeiro.the present study was performed using data from a biomphalaria tenagophila population located in a watercress garden in the alto da boa vista region representing an isolated focal point of schistosomiasis in the city of rio de janeiro. the density and age structure of this b. tenagophila population and its rate of infection by schistosoma mansoni were studied for a period of 15 months. the snail population showed seasonal variation in density, with a decrease in number of individuals at the begi ...19892520827
evaluation of the sensitivity of igg and igm elisa in detecting schistosoma mansoni infections in a low endemicity setting.schistosomiasis is a major public health concern, with 200 million people infected worldwide. in brazil, this disease has been reported in 19 states, and its prevalence in the city of barra mansa in rio de janeiro state is 1 %. the parasitological diagnostic methods currently available in these areas lack sensitivity; however, enzyme-linked immunosorbent assays (elisas) have been employed successfully for the diagnosis of schistosomiasis by using antibodies against antigens of schistosoma manson ...201425030291
evaluation of real-time pcr assay to detect schistosoma mansoni infections in a low endemic setting.schistosomiasis constitutes a major public health problem, and 200 million people are estimated to be infected with schistosomiasis worldwide. in brazil, schistosomiasis has been reported in 19 states, showing areas of high and medium endemicity and a wide range of areas of low endemicity (ale). barra mansa in rio de janeiro state has an estimated prevalence of 1%. ale represent a new challenge for the helminth control because about 75% of infected individuals are asymptomatic and infections occ ...201425338651
schistosomiasis vaccine candidate sm14/gla-se: phase 1 safety and immunogenicity clinical trial in healthy, male adults.safety and immunogenicity of a recombinant 14kda, fatty acid-binding protein(fabp) from schistosoma mansoni (rsm14) were evaluated through an open, non-placebo-controlled, dose-standardized trial, performed at a single research site. the vaccine was formulated with glucopyranosyl lipid a (gla) adjuvant in an oil-in-water emulsion (se) and investigated in 20 male volunteers from a non-endemic area for schistosomiasis in the state of rio de janeiro, brazil. fifty microgram rsm14 with 10 μg gla-se ...201626571311
malacological survey of biomphalaria snails in municipalities along the estrada real in the southeast of the state of minas gerais, brazil.the increasing practice of ecotourism and rural tourism in the state of minas gerais, brazil, highlights the importance of studies concerning the occurrence of potential intermediate hosts of schistosoma mansoni. this study aimed to identify species of biomphalaria snails in municipalities along the estrada real, an important brazilian tourism project.201121556490
a 15-year follow-up study on schistosomiasis in a low-endemic area in rio de janeiro state, brazil.fifteen years after our first investigation, a follow-up study was carried out with the purpose of assessing the evolution of schistosomiasis in the locality of sabugo, paracambi, state of rio de janeiro, brazil, an area with low prevalence of the disease. the coprological techniques adopted were spontaneous sedimentation and kato-katz. out of the 1356 individuals assessed, 13 (1%) were infected with schistosoma mansoni. from those, 10 were males, 12 were over 15 years old, and at least 11 had b ...201019775486
serological studies in nectomys squamipes demonstrate the low sensitivity of coprological exams for the diagnosis of schistosomiasis.the existence of wild rodents naturally infected by schistosoma mansoni is a drawback for schistosomiasis control programs. as a consequence, it is necessary to have a precise diagnosis of s. mansoni infection in wild rodents (water rats; nectomys squamipes), the species seemingly involved in the transmission of schistosomiasis at sumindouro, rio de janeiro, brazil. a total of 78 specimens of n. squamipes was captured in an endemic area at vale do pamparrão and porteira verde, sumidouro, brazil; ...200918983203
freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: vi--noroeste fluminense mesoregion.in this paper, the last of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the noroeste fluminense mesoregion from 2002 to 2005 are presented and revealed the occurrence of 20 species: antillorbis nordestensis; biomphalaria glabrata; b. straminea; b. tenagophila; drepanotrema anatinum; d. cimex; d. depressissimum; d. lucidum; ferrissia sp.; gundlachia ticaga; gundlachia sp.; heleobia sp.; idiopyrgus sp.; lymnaea ...200617308776
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