| [parasitological survey, with special reference to schistosomiasis mansoni, conducted in the region of jacupiranga (ribeira valley, state of são paulo). survey of the location and distribution of planorbidian snails in the state of são paulo. vii]. | the results of a parasitological survey, emphasizing particularly schistosomiasis mansoni, are presented. the area under study was the district of cajati, situated in the "município" of jacupiranga (state of são paulo, brazil) near schistosomiasis-endemic areas in vale do ribeira. though the presence of parasitized people by schistosoma mansoni has been reported and focuses of biomphalaria tenagophila, the species responsible for the spreading of the parasites through great areas of the state, h ... | 1975 | 1241922 |
| biological and morphological characteristics of schistosoma mansoni from ribeira valley, state of são paulo, brazil i--susceptibility of biomphalaria tenagophila snail to sympatric s. mansoni strain. | in the são paulo state, brazil, where the biomphalaria tenagophila is the intermediate host, the ribeira valley is an important endemic schistosomiasis mansoni area. during last eleven years there has been intense control measures focusing on schistosomiasis. the efforts have been concentrated in the municipalities of pedro de toledo and itariri. we determined the susceptibility of b. tenagophila to sympatric strain of s. mansoni, both recently isolated from itariri field. in 1988, this strain w ... | 1992 | 1342070 |
| [control of schistosomiasis mansoni in an area of low transmission]. | the schistosomiasis is transmitted by biomphalaria tenagophila in our study area (pedro de toledo, são paulo, brazil). from 1980 to 1990 epidemiological surveys in a population of 4,000 inhabitants, has shown that: prevalences by kato-katz (kkt), immunofluorescence (ft) and intradermal (idt) techniques were 22.8%, 55.5% and 51.8%, respectively; intensity of infection was low, 58.5 eggs per gram of faeces (epg); there were no symptomatic cases; prevalences were higher in mates, children and rural ... | 1992 | 1343901 |
| schistosomiasis mansoni in an area of low transmission. i. impact of control measures. | this work was undertaken in the municipality of pedro de toledo (são paulo state, brazil) in 1987, to clarify aspects related to the transmission levels of schistosoma mansoni in a human population where the snail host is biomphalaria tenagophila. since 1980 a control programme has been undertaken in this municipality. urban and rural populations (4,719 subjects) were submitted to faecal examinations (kato-katz method). the overall prevalence rate was 4.8% being higher in males (6.2%) and also i ... | 1991 | 1844388 |
| schistosomiasis mansoni in the municipality of pedro de toledo (são paulo, brazil) where the biomphalaria tenagophila is the snail host. i--prevalence in human population. | due to the scarce information about the epidemiological features of schistosomiasis in which the vector is biomphalaria tenagophila, an investigation was carried in pedro de toledo in 1980 where such peculiarity is observed. stool examinations (kato-katz method) were performed in 4,741 individuals (22.8% positive to schistosoma mansoni eggs) of this 583 had previously received chemotherapy and 4,158 remainders, untreated. the schistosomiasis prevalence in those two groups where respectively 31.7 ... | 1989 | 2513633 |
| [distribution of biomphalaria tenagophila and b. occidentalis in the state of são paulo (brazil)]. | the geographical distribution of biomphalaria tenagophila (d'orbigny, 1835) and b. occidentalis paraense, 1981 in s. paulo state, brazil, is described. the first species being the most important intermediate host of schistosoma mansoni sambon, 1907. the second species is unsusceptible to transmission. the two species inhabit the limnic environments of great areas of s. paulo, occasionally in simpatria. the 3,160 samples of mollusks collected between september 1981 and march 1986 were examined. b ... | 1989 | 2515586 |
| [verification of antagonism between larvae of schistosoma mansoni and other digenea in biomphalaria tenagophila, a planorbid mollusc from a natural breeding in the region of campinas, sp, brazil]. | | 1988 | 3150870 |
| [potential of biomphalaria tenagophila from pampulha lake, belo horizonte, mg, as a host of schistosoma mansoni]. | biomphalaria tenagophila snails, from a population originally obtained from "pampulha" lake, belo horizonte, minas gerais state, brazil, were exposed to miracidia from four strains of schistosoma mansoni: "le" and "hk" from belo horizonte, "al" from alagoas and "sj" from são josé dos campos, são paulo. the "le", "al" and "sj" strains are maintained in the laboratory and the "hk" strain was obtained from feces of a patient residing near to "pampulha" lake. infection rates were of 4% ("le" strain) ... | 1987 | 3507567 |
| [biomphalaria tenagophila naturally infected with schistosomias mansoni in cubatão, state of são paulo, brazil]. | | 1967 | 5629112 |
| [susceptibility of biomphalaria tenagophila from the state of são paulo to infection by schistosoma mansoni strains from the baixada maranhense (maranhão, brazil]. | | 1984 | 6531638 |
| occurrence of biomphalaria tenagophila (d'orbigny, 1835) in the municipality of ilhabela, at the seacoast of são paulo, brazil. | | 1996 | 9163989 |
| detection of igm antibodies to schistosoma mansoni gut-associated antigens for the study of the dynamics of schistosomiasis transmission in an endemic area with low worm burden. | for a period of 2 years, five follow-up measures of prevalence and incidence rates were estimated in a prospective study of s. mansoni infection in a group of schoolchildren who were living in a rural area of the municipality of itariri (são paulo, brazil), where schistosomiasis is transmitted by biomphalaria tenagophila. infection was determined by the examination of three kato-katz stool slides, and the parasitological findings were analyzed in comparison to serological data. in the five surve ... | 1998 | 9876435 |
| [search of natural occurrence of xiphidiocercariae (trematoda) in fresh water snails of nine countries from são paulo state, brazil]. | xiphidiocercariae, aquatic larval stages of some trematodes are considered a potential instrument for biological control of mosquitoes. in this study we evaluated its natural occurrence in campinas region and two places in vale do ribeira (registro and miracatu), são paulo state. snails were obtained from fresh water collections from september 1996 to february 1999. the species collected were lymnaea columella, physa marmorata, biomphalaria tenagophila, biomphalaria sp., drepanotrema cimex, d. l ... | 2001 | 12058671 |
| schistosomiasis mansoni in bananal (state of são paulo, brazil): ii. intermediate hosts. | we conducted monthly snail captures in bananal, state of são paulo, brazil, between march 1998 and february 2001, to identify schistosoma mansoni vectors, estimate seasonal population changes, and delimit foci. we also evaluated the impact of improvements in city water supply and basic sanitation facilities. we identified 28,651 vector specimens, 28,438 as biomphalaria tenagophila, 49 of them (0.2%) infected with s. mansoni, and 213 as b. straminea, none of the latter infected. vectors predomina ... | 2002 | 12426592 |
| [occurrence of schistosomiasis mansoni vectors on the northern coast of the state of são paulo, brazil]. | this article comments on the detection of biomphalaria tenagophila (d'orbigny, 1835) infected with schistosoma mansoni sambon, 1907 in caraguatatuba and the introduction of biomphalaria straminea (dunker, 1848) in ilha bela, two municipalities on the northern coast of the state of são paulo, brazil. infected snails were collected from a ditch located in the olaria district. b. straminea and b. tenagophila were living in syntopy in a stream situated in barra velha. such epidemiological findings i ... | 2004 | 14999356 |
| [geographic distribution of schistosoma mansoni transmitter snail species in state of são paulo]. | a thorough knowledge of the geographic distribution of schistosoma mansoni vector snails is indispensable for the control of schistosoma mansoni schistosomiasis and its epidemiologic surveillance. from the water masses of the state of são paulo (brazil) 8,771 lots of snails--total of 108,244 individuals of the genus biomphalaria--were captured between 1982 and 2002. these specimens are now part of the malacological collection of (superintendência de controle de endemias--são paulo). according to ... | 2005 | 16172761 |
| schistosoma mansoni and other larval trematodes in biomphalaria tenagophila (planorbidae) from guarulhos, são paulo state, brazil. | a total of 909 biomphalaria tenagophila were collected from two areas in guarulhos (metropolitan area of são paulo, são paulo state, brazil) to assess larval trematode infections. in all collection sites, only this species was found and 183 (20.13%) harbored trematode infections. in these collections, four morphologically distinguishable types of cercariae were identified by confocal microscopy. xiphidiocercaria (cercaria lutzi) was the most common type of cercaria recovered, contributing 76.5% ... | 2009 | 19390735 |