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Search Results: 1 - 10 of 119145 matches for " Marlene T Ueta "
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Infecciones por Strongyloides stercoralis en Chile
Mercado,Rubén; Jercic,María Isabel; Ueta,Marlene T;
Boletín chileno de parasitología , 2001, DOI: 10.4067/S0365-94022001000200007
Abstract: a limited epidemiological information on strongyloides stercoralis infection excists in chile. in 1983 a mentally retarded 53-year-old man died by disseminated strongyloidiosis associated with malabsortion syndrome, this case constitutes the first histopathological confirmation of the parasitose in chile. later on, cases have been described in hospitalized patients in mental institutions from the central part of the country, where the frequency of infection registered in studies carried out in the psyquiatric hospital of putaendo in 1985 and 1987-1989 were 11.6% and 7.0%. in 1992 an outbreak of strongyloidiasis that affected 13 out of 55 children in a nutritional recuperation center in the north extreme of chile was reported. in 2000 four cases were detected in a group of 20 hospitalized mental affected patients with elevated eosinophilia. sensitive methods for detecting larvae in stool samples and seroepidemiological surveys would permit determine the importance of this human heminthic infection in chile.
Infecciones por Strongyloides stercoralis en Chile Strongyloides stercoralis infections in Chile
Rubén Mercado,María Isabel Jercic,Marlene T Ueta
Boletín chileno de parasitología , 2001,
Abstract: A limited epidemiological information on Strongyloides stercoralis infection excists in Chile. In 1983 a mentally retarded 53-year-old man died by disseminated strongyloidiosis associated with malabsortion syndrome, this case constitutes the first histopathological confirmation of the parasitose in Chile. Later on, cases have been described in hospitalized patients in mental institutions from the central part of the country, where the frequency of infection registered in studies carried out in the Psyquiatric Hospital of Putaendo in 1985 and 1987-1989 were 11.6% and 7.0%. In 1992 an outbreak of strongyloidiasis that affected 13 out of 55 children in a nutritional recuperation center in the north extreme of Chile was reported. In 2000 four cases were detected in a group of 20 hospitalized mental affected patients with elevated eosinophilia. Sensitive methods for detecting larvae in stool samples and seroepidemiological surveys would permit determine the importance of this human heminthic infection in Chile.
Búsqueda de xifidiocercarias (Trematoda) en moluscos de agua dulce recolectados en nueve municipios del Estado de S?o Paulo, Brasil
de Carvalho,Gílcia A.; Ueta,Marlene T.; de Andrade,Carlos F. S.;
Boletín chileno de parasitología , 2001, DOI: 10.4067/S0365-94022001000100003
Abstract: 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), s?o 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. lucidum and drepanotrema sp. fasciola hepatica, xiphidiocercariae (haematoloechidae) and echinostomatid cercariae were detected in the lymnaeids snails from miracatu, sp. in the same locality were found planorbids snails parasitized by furcocercariae, echinostomatid cercariae and xiphidiocercariae. the xiphidiocercariae found in the planorbids were different from those obtained from lymnaeids. one biomphalaria sp. infected with furcocercariae was found in louveira, sp. in the rosa place (campinas, sp) an individual of biomphalaria sp. and one of l. columella were found infected by the furcocercariae and echinostomatid cercariae, respectively. in the place uni-i, in campinas, one l. columella was infected by furcocercariae. double infection in snails from miracatu was also observed
Estudios morfométricos y biológicos de xifidiocercarias (Trematoda) provenientes de la infección natural de Lymnaea columella Say, 1817 (Basommatophora, Lymaenidae) y Biomphalaria tenagophila Orbigny, 1835 (Basommatophora, Planorbidae) recolectados en Miracatu, Estado S?o Paulo, Brasil
de Carvahlo,Gílcia A; Ueta,Marlene T; Andrade,Carlos F. S.;
Boletín chileno de parasitología , 2001, DOI: 10.4067/S0365-94022001000200005
Abstract: two species of xiphidiocercariae probably belonging to the family haematoloechidae (trematoda) emerging from lymnaea columella (basommatophora, lymnaeidae) and biomphalaria tenagophila (basommatophora, planorbidae) collected in miracatu city, s?o paulo state, brazil, between september 1996 and february 1999 were described. the xiphidiocercariae eliminated by l. columella presented a terminal membrane in the tail that morphologicaly differenciated them from those obtained from b. tenagophila. these late xiphidiocercariae were 1.3 times bigger than the former and with the of that ventral sucker bigger than the oral one, while the former presented a sucker size relation inverse. the stylet observed in the xiphidiocercariae eliminated by b. tenagophila oral sucker was shorter than that observed in xiphidiocercariae obtained from l. columella.
Exposure to larva migrans syndromes in squares and public parks of cities in Chile
Mercado,Rubén; Ueta,Marlene T; Castillo,Douglas; Mu?oz,Victor; Schenone,Hugo;
Revista de Saúde Pública , 2004, DOI: 10.1590/S0034-89102004000500017
Abstract: between november 2001 and december 2002, 600 dog fecal samples were collected in main squares and public parks of 13 cities in chile, from the extreme north to the extreme south of the country. the samples were processed in the laboratory by centrifugal sedimentation and the harada-mori methods. t. canis eggs were found in 12 cities. detection rates ranged from 1.9 to 12.5% with an average of 5.2%. seven percent of the samples had eggs and 9.5% had rhabditoid and/or filariform larvae of ancylostomatidae. strongyloides stercoralis were not found. squares and public parks in chile pose a potential risk of exposure to visceral, ocular, and/or cutaneous larva migrans syndromes.
Exposure to larva migrans syndromes in squares and public parks of cities in Chile
Mercado Rubén,Ueta Marlene T,Castillo Douglas,Mu?oz Victor
Revista de Saúde Pública , 2004,
Abstract: Between November 2001 and December 2002, 600 dog fecal samples were collected in main squares and public parks of 13 cities in Chile, from the extreme north to the extreme south of the country. The samples were processed in the laboratory by centrifugal sedimentation and the Harada-Mori methods. T. canis eggs were found in 12 cities. Detection rates ranged from 1.9 to 12.5% with an average of 5.2%. Seven percent of the samples had eggs and 9.5% had rhabditoid and/or filariform larvae of Ancylostomatidae. Strongyloides stercoralis were not found. Squares and public parks in Chile pose a potential risk of exposure to visceral, ocular, and/or cutaneous larva migrans syndromes.
Búsqueda de xifidiocercarias (Trematoda) en moluscos de agua dulce recolectados en nueve municipios del Estado de S o Paulo, Brasil Search of natural occurrence of xiphidiocercariae (Trematoda) in fresh water snails of nine counties from S o Paulo State, Brazil
Gílcia A. de Carvalho,Marlene T. Ueta,Carlos F. S. de Andrade
Boletín chileno de parasitología , 2001,
Abstract: 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), S o 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. lucidum and Drepanotrema sp. Fasciola hepatica, xiphidiocercariae (Haematoloechidae) and echinostomatid cercariae were detected in the lymnaeids snails from Miracatu, SP. In the same locality were found planorbids snails parasitized by furcocercariae, echinostomatid cercariae and xiphidiocercariae. The xiphidiocercariae found in the planorbids were different from those obtained from lymnaeids. One Biomphalaria sp. infected with furcocercariae was found in Louveira, SP. In the ROSA place (Campinas, SP) an individual of Biomphalaria sp. and one of L. columella were found infected by the furcocercariae and echinostomatid cercariae, respectively. In the place UNI-I, in Campinas, one L. columella was infected by furcocercariae. Double infection in snails from Miracatu was also observed
Estudios morfométricos y biológicos de xifidiocercarias (Trematoda) provenientes de la infección natural de Lymnaea columella Say, 1817 (Basommatophora, Lymaenidae) y Biomphalaria tenagophila Orbigny, 1835 (Basommatophora, Planorbidae) recolectados en Miracatu, Estado S o Paulo, Brasil Morphometric and biological studies on xiphidiocercariae (Trematoda) recovered from Lymnaea columella Say, 1817 (
Gílcia A de Carvahlo,Marlene T Ueta,Carlos F. S. Andrade
Boletín chileno de parasitología , 2001,
Abstract: Two species of xiphidiocercariae probably belonging to the family Haematoloechidae (Trematoda) emerging from Lymnaea columella (Basommatophora, Lymnaeidae) and Biomphalaria tenagophila (Basommatophora, Planorbidae) collected in Miracatu City, S o Paulo State, Brazil, between September 1996 and February 1999 were described. The xiphidiocercariae eliminated by L. columella presented a terminal membrane in the tail that morphologicaly differenciated them from those obtained from B. tenagophila. These late xiphidiocercariae were 1.3 times bigger than the former and with the of that ventral sucker bigger than the oral one, while the former presented a sucker size relation inverse. The stylet observed in the xiphidiocercariae eliminated by B. tenagophila oral sucker was shorter than that observed in xiphidiocercariae obtained from L. columella.
Ocorrência de infec??o natural de Fasciola hepatica Linnaeus, 1758 em Lymnaea columella Say, 1817 no Vale do Paraíba, SP, Brasil
Ueta,Marlene Tiduko;
Revista de Saúde Pública , 1980, DOI: 10.1590/S0034-89101980000200010
Abstract: infection rates of 1.22% and 0.14% were obtained in lymnaea columella snails naturally infected by fasciola hepatica. samples of the snails were collected in piquete, a municipality of paraíba do sul, a river valley area in the state of s. paulo. also observed was one of the 1052 specimen of the lymnaea columella rediae which had xiphidiocercariae and rediae with fasciola hepatica cercariae and metacercariae of echinostomatidae.
Infec??o experimental de Lymnaea columella por Fasciola hepatica
Ueta,Marlene Tiduko;
Revista de Saúde Pública , 1980, DOI: 10.1590/S0034-89101980000100004
Abstract: f. hepatica eggs from infected cattle and rabbits were incubated at room temperature, hatching miracidia within 9 to 13 days. newly hatched miracidia were used to infect 233 l. columella 5 to 11 mm long. only 3% of the infected snails survived until the cercariae fully developed. from 190 to 1150 metacercariae developed within 46 to 54 days. laboratory-bred mice, rats, guinea pigs, and rabbits were fed metacercariae of different ages, but only the rabbits eliminated eggs in their feces, and this 78 days after infection, adult worms were recovered after death of the rabbits.
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