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Linhares, Alexandre da Costa
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Id: biblio-945879
Autor: Aragão, Glicélia Cruz; Oliveira, Darleise de Souza; Santos, Mirleide Cordeiro dos; Mascarenhas, Joana D'Arc Pereira; Oliveira, Consuelo Silva de; Linhares, Alexandre da Costa; Gabbay, Yvone Benchimol.
Título: Molecular characterization of norovirus, sapovirus and astrovirus in children with acute gastroenteritis from Belém, Pará, Brazil / Caracterização molecular de norovírus, sapovírus e astrovírus em crianças com gastroenterite aguda em Belém, Pará, Brasil
Fonte: Rev. Pan-Amazônica Saúde (Online);1(1):149-158, 2010. tab, graf.
Idioma: pt.
Resumo: The importance of norovirus (NoVs), sapovirus (SaVs) and human astrovirus (HAstVs) as causes of gastroenteritis outbreaks are already well-defined, but a few studies have described sporadic cases of acute gastroenteritis caused by these viral entities. The aim of this study was to determine the role of these viruses in the etiology of acute gastroenteritis in children enrolled to participate in hospital – and emergency department – based intensive surveillance carried out in Belém, Brazil, from March to September 2003. A total of 305 stool specimens from patients with severe gastroenteritis were collected and screened by reverse transcription followed by polymerase chain reaction (RT-PCR), using the specific primers Mon 269 and Mon 270 for HAstVs, p289 and p290 for human calicivirus (HuCVs), and Mon 431/433 and Mon 432/434 for NoVs. Sequencing of RT-PCR HAstV, HuCVs and NoVs amplicons was carried out using the same primers. Of the 305 samples tested, 96 (31.5 percent) were positive, with 51 diagnosed as HuCVs, 40 as HAstVs and five as mixed infections. Of the 56 (18.4 percent) HuCVs sequenced, 30 were NoVs (9.8 percent) of genogroups GI-4 and GII-4, and 15 (4.9 percent) were SaVs of types GI-1, GI-2 and GII-1. HAstVs, including genotypes 1, 8 and 2, were detected in 45 (14.7 percent) samples. This study has highlighted the importance of these viruses as causes of acute gastroenteritis and established the circulation of different genotypes during the study period. These results reinforce the need for establishing an intensive surveillance for gastroenteritis caused by these viruses to assess the burden of disease and to monitor the circulation of genotypes.

A importância dos norovírus (NoVs), sapovírus (SaVs) e astrovírus humanos (HAstVs) como causa de surtos de gastroenteritis já está bem definida. Entretanto, poucos estudos têm descrito casos esporádicos de gastroenterites aguda causados por esses agentes. O objetivo deste estudo foi determinar o papel destes vírus na etiologia da gastroenterite aguda em crianças atendidas durante uma vigilância intensiva realizada em hospitais e ambulatórios de Belém, Brasil, de março a setembro de 2003. Um total de 305 espécimes fecais de pacientes com gastrenterite grave foram coletados e testados por reação em cadeia da polimerase precedida de transcrição reversa (RT-PCR), utilizando iniciadores específicos Mon 269 e Mon 270 para os HAstVs; p289 e p290 para os calicivírus humanos (HuCVs); e Mon 431/433 e Mon 432/434 para os NoVs. Sequenciamento dos amplicons de HAstV, HuCVs e NoVs, obtidos por RT-PCR, foi realizado usando os mesmos iniciadores. Das 305 amostras testadas, 96 (31,5 por cento) apresentaram resultados positivos, sendo que 51 diagnosticadas como HuCVs, 40 como HAstVs e cinco infecções mistas. Das 56 (18,4 por cento) amostras de HuCVs sequenciadas, 30 foram NoVs (9,8 por cento) pertencentes aos genogrupos GI-4 e GII-4, e 15 (4,9 por cento) SaVs dos grupos GI-1, GI-2 e GII-1. HAstVs foram detectados em 45 (14,7 por cento) das amostras, incluindo os genótipos 1, 8 e 2. Esta pesquisa ressalta a importância destas viroses como causa de gastrenterite aguda e demonstra a circulação de diferentes genótipos durante o período de estudo. Estes resultados reforçam a necessidade de se estabelecer uma vigilância intensiva das gastrenterite causadas por estes vírus, de forma a poder avaliar o impacto da doença e monitorar os genótipos circulantes.
Responsável: BR275.1 - Biblioteca


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Id: biblio-971381
Autor: Giordano, Miguel Oscar.
Título: Monitoreo y confección de mapas que reflejen la contaminación estacional por astrovirus humano en las aguas del río Suquía de la ciudad de Córdoba, Argentina.
Fonte: Córdoba; s.n; 2015. 70 p. ilus, graf.
Idioma: es.
Tese: Apresentada a Universidad Nacional de Córdoba. Facultad de Ciencias Médicas. Secretaría de Graduados en Ciencias de la Salud. Maestría en Microbiología con Orientación en Investigación en Salud Humana para obtenção do grau de Mestre.
Resumo: El agua es reconocida como el recurso natural más preciado de nuestro planeta, el descuido de las fuentes de agua ligado a las actividades humanas, genera contaminación sostenida en el tiempo y lleva como resultado a la disminución en la calidad y cantidad de este recurso esencial. La presencia de patógenos virales en las fuentes de agua tienen un alto impacto socioeconómico tanto en las naciones en desarrollo como en las desarrolladas. La ocurrencia de virus entéricos como rotavirus, astrovirus, norovirus y adenovirus en el ambiente, en aguas y alimentos, ha sido reportada en los países desarrollados y asociada a gastroenteritis de origen viral relacionada con el consumo de agua contaminada con materia fecal. En Argentina y otros países de Sudamérica no hay regulaciones sobre el monitoreo de virus patógenos en matrices acuosas y existen pocos estudios de monitoreo ambiental de patógenos virales (rotavirus, norovirus, adenovirus, enterovirus) en aguas superficiales de ríos y lagos. Más aún, no se dispone de información sobre el monitoreo ambiental de astrovirus en aguas superficiales en la Argentina. En este trabajo de tesis se abordó el estudio de astrovirus humano en aguas del río Suquia con los objetivos de: 1. Evaluar las aguas del río Suquía como potencial fuente de transmisión de astrovirus humano (HastV). 2. Conocer si el río Suquía está integrado a la historia natural de circulación de astrovirus en nuestro medio. A los fines de cumplir los objetivos planteados se analizaron un total de 28 muestras de agua recolectadas en 7 puntos representativos del río Suquía, cubriendo el muestreo desde el nacimiento (Dique San Roque) hasta que el río abandona la Ciudad de Córdoba (Cantera San José).

Abstract: Water is the most precious natural resource on Earth; neglected water sources associated with anthropogenic activities generate sustained contamination over time and results in a reduction in quantity and quality of this essential resource. The presence of pathogenic virus in water sources has a high socioeconomic impact, both in developing and developed countries. The occurrence of enteric virus, such as rotavirus, astrovirus, norovirus and adenovirus, in the environment, water and food has been reported in developed countries associated with viral gastroenteritis related to consumption of fecal-contaminated water.In Argentina as well as in other South American countries, there are regulations no requiring monitoring of pathogenic viruses in water matrices, and few studies have focused on environmental monitoring of viral pathogens (rotavirus, norovirus, adenovirus, enterovirus) in surface waters of rivers and lakes. Moreover, there is no information available on environmental monitoring of astrovirus in surface waters in Argentina. This thesis work focuses on the study of human astrovirus in the waters of the Suquía river, with the general aims of: 1. evaluating the waters of Suquía river as a potential source of transmission of human astrovirus (HastV), and 2. Knowing if Suquía river is integrated to the natural history of astrovirus circulation in our environment. To meet the aims of this work, a total of 28 water samples were collected from 7 representative points along Suquía river course, with sampling covering from the riverhead (San Roque Dam) to the site where the river leaves the city of Córdoba (San José quarry).
Responsável: AR32.1 - Biblioteca Prof. Dr. J. M. Allende
AR32.1; TM, G-58 015


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Id: biblio-884538
Autor: López Peraza, Claudia Patricia; Lanza Fernández, Teresa Ondina; Sánchez Tapia, Rosana.
Título: Características clínicas y epidemiológicas de diarrea nosocomial por rotavirus en niños / Clinical and epidemiological characteristics of nosocomial Rotavirus diarrhea in children
Fonte: Acta pediátr. hondu;4(1):249-252, abr.-sep. 2013. tab., graf..
Idioma: es.
Resumo: Antecedentes y Objetivo: Las infecciones nosocomiales son infecciones que se adquie- ren después de 48 horas de estancia hospita- laria. Entre las formas mas comunes esta la diarrea nosocomial. Se quiso determinar las características clínicas y epidemiológicas de la diarrea nosocomial por rotavirus en niños. Pacientes y Métodos: Se realizó un estudio descriptivo transversal en el departamento de pediatría del Hospital Regional del Norte- Instituto Hondureño de Seguridad Social (IHSS-HRN). Se incluyeron en el estudio todos los niños entre 1 mes a 5 años de edad con diagnóstico confirmado, probable o sospecho de diarrea nosocomial y que fueron ingresados en la sala A y B de pediatría duran- te el periodo de 12 meses a partir de Agosto del 2012. 46 niños cumplieron todos los crite- rios de inclusión. Resultados: 61% de los niños con diarrea nosocomial por rotavirus son menores de 24 meses. La ablactación temprana fue un hallazgo en el 37% de los casos. El 63% de los niños tenían entre 5-7 días de estancia hospitalaria cuando iniciaron los síntomas caracterizados por la triada diarrea, vómitos y fiebre. La incidencia de la diarrea nosocomial fue de 1.9 por cada 100 egresos. Conclusiones: Los lactantes son los niños con mayor riesgo de adquirir diarrea nosocomial, especialmente si ha habido ablactación temprana. A mayor estancia hos- pitalaria mayor riesgo de diarrea nosocomial...(AU)
Responsável: HN1.1 - Biblioteca Médica Nacional


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Id: lil-774266
Autor: Xavier, Maria da Penha Trindade Pinheiro.
Título: Estudo retrospectivo dos astrovirus humanos associados a casos de gastrenterite aguda em crianças residentes em tres regioes do Brasil: nordeste, sudeste e sul no período de 1994 a 2011 / Retrospective study of human astrovirus associated with cases of acute gastroenteritis in children living in three regions of Brazil: northeast, southeast and south in the period 1994-2011.
Fonte: Rio de Janeiro; s.n; 2015. xiii,108 p. ilus, tab.
Idioma: en; pt.
Tese: Apresentada a Instituto Oswaldo Cruz para obtenção do grau de Doutor.
Resumo: Os astrovírus humanos (HAstVs) pertencem a família Astroviridae e são associados agastrenterite aguda (GA) em crianças menores de cinco anos, tanto nos paísesdesenvolvidos como naqueles em desenvolvimento, o que os tornam de interesse nocampo da Saúde Pública. A família Astroviridae é dividida em dois gêneros:Avastrovirus e Mamastrovirus. No gênero Mamastrovirus, encontram-se os astrovirusassociados à infecção em mamíferos, tanto humanos como animais. Até 2008, osastrovirus associados a doenças em humanos eram restritos a oito genótipos,conhecidos como HAstV 1-8. A partir de então novos HAstVs foram sendo descritos,associados a doenças em humanos, como os HAstVs MLB1-3 e os HAstVs VA1-4.Opresente estudo consiste no estudo epidemiológicos retrospectivos (1994 a 2011) paradetecção e caracterização molecular de HAstV em amostras de fezes provenientes decrianças com menos de cinco anos de idade com GA, em diferentes regiões do Brasil:Nordeste, Sudeste e Sul. Incluem-se neste trabalho três estudos: 1) Estudo dosHAstV em casos esporádicos de GA ocorridos em crianças menores de cinco anos deidade, em três regiões brasileiras (Nordeste, Sudeste e Sul), durante o período de2005 a 2011, incluindo a pesquisa dos novos HAstV; 2) Estudo dos HAstV em criançascom GA, atendidas na creche Bertha Lutz, FIOCRUZ-RJ, durante o período de janeirode 1994 a dezembro de 2008; 3)...

Human astrovirus (HAstVs), belong to Astroviridae family, and are associatedwith acute gastroenteritis (GA) in children under five years-old, both indeveloped and in developing countries, which makes them of interest in thePublic Health field. The Astroviridae family is divided into two genera:Avastrovirus and Mamastrovirus. Mamastrovirus are the astrovirusesassociated to infection in mammals, both humans and animals. By 2008, theastrovirus associated with human disease were restricted to eight genotypes,known as HAstV 1-8. Since then, new HAstVs have been described, associatedwith human disease, such as HAstVs MLB1-3 and HAstVs VA1-4. The presentstudy is the retrospective epidemiological study (1994 to 2011) for the detectionand molecular characterization of HAstV in stool samples from children underfive years old presenting GA, in different regions of Brazil: Northeast, Southeastand South. Three studies are presented: 1) Study of HAstV in sporadic cases ofGA occurred in children under five years old in three Brazilian regions(Northeast, Southeast and South) from 2005 to 2011, including the descriptionof a new HAstV; 2) Study of HAstV in children with GA, attending the day careBertha Lutz, FIOCRUZ-RJ from January 1994 to December 2008 and 3) Studyof HAstV in children under two years old presenting GA and hospitalized inNiteroi, Rio de Janeiro from April to September 2003. The detection of HAstVwas performed using different protocols for detection and molecularcharacterization such as: Reverse–transcriptase polymerase chain reaction,(RT- PCR), Single step RT -PCR (OneStep RT-PCR) and RealTime RT- PCR.The HAstV detected were characterized by partial sequencing of ORF2 regionof the viral genome. The study 1 demonstrated the HAstV detection frequencyin 7.1 % of samples, and described the first ASTV MLB1 in Brazil. Themolecular characterization identified the circulation genotypes HAstV -1, 2, 3, 4,5, 6 and 8...
Responsável: BR15.1 - Biblioteca de Ciências Biomédicas


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Id: lil-716303
Autor: Raboni, Sonia Maria; Damasio, Guilherme Augusto Costa; Ferreira, Carla EO; Pereira, Luciane A; Nogueira, Meri B; Vidal, Luine R; Cruz, Cristina R; Almeida, Sergio M.
Título: Acute gastroenteritis and enteric viruses in hospitalised children in southern Brazil: aetiology, seasonality and clinical outcomes
Fonte: Mem. Inst. Oswaldo Cruz;109(4):428-435, 03/07/2014. tab, graf.
Idioma: en.
Resumo: Viral acute gastroenteritis (AG) is a significant cause of hospitalisation in children younger than five years. Group A rotavirus (RVA) is responsible for 30% of these cases. Following the introduction of RVA immunisation in Brazil in 2006, a decreased circulation of this virus has been observed. However, AG remains an important cause of hospitalisation of paediatric patients and only limited data are available regarding the role of other enteric viruses in these cases. We conducted a prospective study of paediatric patients hospitalised for AG. Stool samples were collected to investigate human adenovirus (HAdV), RVA, norovirus (NoV) and astrovirus (AstV). NoV typing was performed by nucleotide sequencing and phylogenetic analysis. From the 225 samples tested, 60 (26%) were positive for at least one viral agent. HAdV, NoV, RVA and AstV were detected in 16%, 8%, 6% and 0% of the samples, respectively. Mixed infections were found in nine patients: HAdV/RVA (5), HAdV/NoV (3) and HAdV/NoV/RVA (1). The frequency of fever and lymphocytosis was significantly higher in virus-infected patients. Phylogenetic analysis of NoV indicated that all of these viruses belonged to genotype GII.4. The significant frequency of these pathogens in patients with AG highlights the need to routinely implement laboratory investigations.
Responsável: BR1.1 - BIREME


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Leite, José Paulo Gagliardi
Miagostovich, Marize Pereira
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Id: lil-660657
Autor: Ferreira, Mônica Simões Rocha; Cubel Garcia, Rita de Casia; Xavier, Maria da Penha Trindade Pinheiro; Ribeiro, Rubia Lane; Assis, Rosane Maria; Mota, Maria do Céu MS; Leite, José Paulo Gagliardi; Miagostovich, Marize Pereira; Oliveira, Solange Artimos de.
Título: Genotyping of gastroenteric viruses in hospitalised children: first report of norovirus GII.21 in Brazil
Fonte: Mem. Inst. Oswaldo Cruz;107(8):1064-1067, Dec. 2012. ilus, tab.
Idioma: en.
Resumo: This retrospective study (April-September 2003) was designed to investigate the roles of the main viruses responsible for cases of acute infantile gastroenteritis in hospitalised children up to two years of age. The viruses were identified in 64.7% (88/136) of the cases and the detection rates of rotavirus A (RVA), norovirus (NoV) and astrovirus were 41.9% (57/136), 30.3% (24/79) and 12.7% (7/55), respectively. RVA and NoV were detected in 20 of the 24 reported nosocomial infection cases. This study identified the first circulation of the genotype NoV GII.21 in Brazil and highlights the need to establish differential diagnoses through active laboratorial surveillance.
Responsável: BR1.1 - BIREME


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Id: lil-634603
Autor: Gomes, K. A.; Stupka, J. A.; Diana, A.; Parra, G. I..
Título: Caracterización molecular de calicivirus aislados de brotes de gastroenteritis ocurridos en la Argentina durante los años 2005 y 2006 / Molecular characterization of calicivirus strains detected in outbreaks of gastroenteritis occurring in Argentina during 2005 and 2006
Fonte: Rev. argent. microbiol;40(4):222-228, oct.-dic. 2008. ilus, tab.
Idioma: es.
Resumo: Con el objetivo de determinar la incidencia de calicivirus, rotavirus y astrovirus en brotes de gastroenteritis ocurridos en diversas regiones de la Argentina durante los años 2005 y 2006, se analizaron muestras de materia fecal provenientes de 7 brotes con resultado de coprocultivo negativo. Para el diagnóstico de rotavirus se utilizó un ELISA comercial, mientras que para el diagnóstico de calicivirus y astrovirus se utilizó el método de RT-PCR. De las 74 muestras analizadas, 20 fueron positivas para calicivirus, 17 para rotavirus y una para astrovirus. No se identificaron infecciones virales mixtas. En 5 muestras positivas para calicivirus se secuenció una región del gen de la polimerasa; 4 de ellas correspondieron al género Norovirus y una al género Sapovirus. El análisis filogenético de las muestras secuenciadas determinó la presencia de norovirus de los genogrupos GI y GII; dentro de este último, se identificaron los genotipos GII-4, GII-b y GII-17. El análisis de la muestra en la cual se identificó sapovirus reveló la presencia del genotipo GI-1. Este estudio representa una continuación del análisis epidemiológico molecular de calicivirus asociados a brotes de gastroenteritis iniciado en 2004 y constituye la primera comunicación de la circulación de norovirus del genotipo GII-17 en la Argentina.

In order to determine the incidence of calicivirus, rotavirus and astrovirus in outbreaks of gastroenteritis occurring in different regions of Argentina during 2005 and 2006, fecal samples from seven nonbacterial outbreaks were analyzed. A commercial ELISA was used for rotavirus detection, while RT-PCRs were used for calicivirus and astrovirus. Of the 74 samples analyzed, 20 were calicivirus positive, 17 were rotavirus positive and one was astrovirus positive. No mixed infections were detected. A partial region of the RdRp gene was sequenced in five calicivirus positive-samples; 4 of them belonged to Norovirus genus and one to Sapovirus genus. The phylogenetic analysis of norovirus-positive-samples revealed the presence of strains from genogroups GI and GII; genotypes GII- 4, GII-b and GII-17 were identified within the latter. Phylogenetic the sapovirus-positive-sample revealed the presence of genotype GI-1. This study represents a follow-up of the of molecular epidemiology analysis of calicivirus associated to gastroenteritis outbreaks that have been carried out by our group since 2004, and constitutes the first report of the circulation of genotype GII-17 in Argentina.
Responsável: AR1.2 - Instituto de Investigaciónes Epidemiológicas


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Cardoso, Divina das Dores de Paula
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Id: lil-548516
Autor: Ferreira, Rui Gilberto; Borges, Ana Maria Tavares; Fiaccadori, Fabiola Souza; Souza, Menira Borges de Lima Dias e; Santos, Rodrigo Alessandro Togo; Cardoso, Divina das Dôres de Paula.
Título: Gastroenteric virus detection in fecal samples from women in Goiânia, State of Goiás, Brazil / Detecção de vírus gastroentéricos em amostras fecais de mulheres em Goiânia, Estado de Goiás, Brasil
Fonte: Rev. Soc. Bras. Med. Trop;43(3):240-243, May-June 2010. tab.
Idioma: en.
Resumo: INTRODUCTION: This was a prospective study that included women seen in the obstetrics and gynecology sector of Hospital das Clínicas, Federal University of Goiás, in Goiânia, State of Goiás, with the aim of detecting rotaviruses, adenoviruses, caliciviruses and astroviruses. Eighty-four women participated in the study and from these, 314 fecal samples were collected. Out of all of the women, 29 were seropositive for HIV and 55 were seronegative, and 45 and 39 were pregnant and non-pregnant, respectively. METHODS: Fecal samples were collected from each woman once every two months over the period from July 2006 to June 2007, and they were screened for rotaviruses by means of polyacrylamide gel electrophoresis and immunoenzymatic assays, for caliciviruses and astroviruses by means of RT-PCR and for adenovirus by means of immunoenzymatic assays. The astroviruses were genotyped using nested PCR. RESULTS: Among the 84 patients, 19 (22.6 percent) were positive for either calicivirus (14/19) or astrovirus (6/19), while one women was positive for both viruses in fecal samples collected on different occasions. Most of the positive samples were collected during the months of July and August (astrovirus) and September and October (calicivirus). None of the samples analyzed was positive for rotavirus or adenovirus. Gastroenteric viruses were detected in 13/19 (68.4 percent) of the pregnant women, whether HIV-seropositive or not. CONCLUSIONS: The results from the present study showed that neither pregnancy nor HIV-seropositive status among the women increased the risk of infection by any of the gastroenteric viruses studied. This study presents data on gastroenteric virus detection among pregnant and/or HIV-positive women.

INTRODUÇÃO: Este foi um estudo prospectivo que incluiu mulheres atendidas no setor de obstetrícia e ginecologia do Hospital das Clínicas da Universidade Federal de Goiás, em Goiânia, Estado de Goiás com o objetivo de detectar rotavírus, adenovírus, calicivírus e astrovírus. Oitenta e quatro mulheres participaram no estudo e destas, 314 amostras fecais foram coletadas. Do total de mulheres, 29 eram soropositivas para HIV, 55 soronegativas, 45 e 39 estavam grávidas e não-grávidas, respectivamente. MÉTODOS: Amostras fecais foram coletadas de cada mulher uma vez a cada dois meses pelo período de Julho-2006 a Junho-2007, foram triadas para rotavírus pela metodologia de eletroforese em gel de poliacrilamida (EGPA) e através de ensaio imunoenzimático (EIE), para calicivírus e astrovírus por RT-PCR e por EIE para adenovírus. Os astrovírus foram genotipados por Nested-PCR. RESULTADOS: De 84 pacientes, 19 (22,6 por cento) foram positivas para calicivírus (14/19) ou astrovírus (6/19), sendo que uma mulher foi positiva para ambos os vírus em amostras fecais coletadas em diferentes ocasiões. A maioria das amostras positivas foi coletada no período de Julho a Agosto (astrovírus) e de Setembro a Outubro (calicivírus). Nenhuma das amostras analisadas foi positiva para rotavírus ou adenovírus. Os vírus gastroentéricos foram detectados em 13/19 (68,4 por cento) mulheres grávidas, as quais eram HIV-soropositivas ou não. CONCLUSÕES: Os resultados do presente estudo mostram que nem o estado gravídico das mulheres nem a soropositividade para HIV aumentaram o risco para a infecção por nenhum dos vírus gastroentéricos estudados. Este estudo apresenta dados sobre a detecção de vírus gastroentéricos entre mulheres grávidas e/ou HIV-positivas.
Responsável: BR1.1 - BIREME


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Leite, José Paulo Gagliardi
Cardoso, Divina das Dores de Paula
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Id: lil-523736
Autor: Silva, Paula Andreia; Santos, Rodrigo Alessandro Tôgo; Costa, Paulo Sérgio Sucasas; Teixeira, José Marcus Sócrates; Giugliano, Loreny Gimenes; Andreasi, Márcia Sueli Assis; Leite, José Paulo Gagliardi; Schreier, Ecakart; Cardoso, Divina das Dôres de Paula.
Título: The circulation of human astrovirus genotypes in the Central West Region of Brazil
Fonte: Mem. Inst. Oswaldo Cruz;104(4):655-658, July 2009. graf.
Idioma: en.
Projeto: CNPq.
Resumo: Out of 1,588 faecal samples of children taken from three locations of the Central West Region of Brazil, 57 were positive for astroviruses (HAstVs) using reverse transcription-polymerase chain reaction (RT-PCR). They were genotyped by nested RT-PCR and/or genomic sequencing. HAstV-1 (42.8 percent), HAstV-2 (23.2 percent), HAstV-3 (3.6 percent), HAstV-4 (14.3 percent) and HAstVs -5, -6, -7 and -8 (1.8 percent each) were detected. In Goiânia and Campo Grande, HAstV-1 was the most frequently detected genotype while in Brasília (DF) it was HAstV-2. Shifts in the circulation of astrovirus genotypes were observed in DF and Campo Grande. All samples collected by rectal swabs were viral negative. The astrovirus genotypes were detected in all age groups and there was no correlation between genotype and age group.
Responsável: BR1.1 - BIREME


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Leite, José Paulo Gagliardi
Miagostovich, Marize Pereira
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Id: lil-502303
Autor: Guimarães, Flávia Ramos; Ferreira, Fabiana Fioretti Martins; Vieira, Carmen Baur; Fumian, Tulio Machado; Shubo, Tatsuo; Leite, José Paulo Gagliardi; Miagostovich, Marize Pereira.
Título: Molecular detection of human astrovirus in an urban sewage treatment plant in Rio de Janeiro, Brazil
Fonte: Mem. Inst. Oswaldo Cruz;103(8):819-823, Dec. 2008. tab.
Idioma: en.
Projeto: Fiocruz. Vice-Presidência de Serviços de Referência e Ambiente; . CNPq; . CAPES.
Resumo: The objective of this study was to evaluate the prevalence and dissemination of human astroviruses (HAstV) in the environment by analyzing urban sewage samples from a wastewater treatment plant in the city of Rio de Janeiro, Brazil. A one-year study was performed with a total of 48 raw and treated sewage composite samples, which were collected biweekly from an activated sludge plant. Virus particles were concentrated by the adsorption-elution method using negatively charged membranes associated to a Centriprep Concentrator® 50 (Nihon Millipore). HAstV were detected in 16.7 percent of the samples in raw and treated sewage by using both qualitative and quantitative reverse transcriptase-polymerase chain reactions (RT-PCR and qPCR, respectively). Positive untreated sewage sample exhibited mean values of 1.1 x 10(4) gEq/mL. The qPCR sensitivity was 18 gEq/reaction. Through utilization of qPCR, a HAstV recovery efficiency of 4.2 percent and 4.3 percent was demonstrated for raw and treated sewage samples, respectively. The presence of HAstV in both the raw and treated sewage samples demonstrated the dissemination of these viruses in the environment as well as viral permanence after sewage treatment. There was a reduction in the total and faecal coliform levels, indicating efficiency of the wastewater treatment plant.
Responsável: BR1.1 - BIREME



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