Norovirus
Mostrando 37-48 de 88 artigos, teses e dissertações.
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37. Identificação e caracterização molecular de norovírus em surtos de gastroenterites no Estado de São Paulo
Norovírus (NoV), anteriormente chamado Norwalk-like vírus, constituem um importante grupo de patógeno humano associado a surtos de gastroenterites não bacterianas. Levantamentos epidemiológicos de surtos demonstram que as mais importantes vias de transmissão são contatos pessoa-pessoa, água e alimentos contaminados, afetando adultos e crianças. Os N
Brazilian Journal of Microbiology. Publicado em: 2008-12
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38. Hospitalization due to norovirus and genotypes of rotavirus in pediatric patients, state of Espírito Santo
Viruses are the leading cause for hospitalization due to gastroenteritis worldwide. Group A rotaviruses (RV) are the most prevalent and are assorted in glycoproteins (G) and protease sensitive (P) dual genotypes based on polymorphic genes that encode the external VP7 and VP4 capsid proteins, respectively. Noroviruses (NoV) have increasingly answered by spora
Memórias do Instituto Oswaldo Cruz. Publicado em: 2008-03
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39. Padronização de PCR quantitativo e desenvolvimento de metodologia de detecção de norovírus em alimentos. / Quantitative standardization of PCR and development of methodology of detention of norovírus in foods.
Food-borne gastroenteritis is an important problem of public health worldwide. The investigation for virus presence in food becomes a requirement, mainly due to the increasing emergence of outbreaks of gastroenteritis related to the consumption of different foods, in particular fruits, vegetables, milk, oysters and contaminated water. Currently, the Noroviru
Publicado em: 2008
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40. Pesquisa de vírus entéricos humanos em lodos de esgoto originários de duas ETEs do Estado de São Paulo: estabelecimento e avaliação de metodologia para recuperação e detecção viral. / Detection of human enteric viruses in sewage sludge from two sewage treatment plants in São Paulo state: establishment and evaluation of a method for viral recovery and detection.
O objetivo foi desenvolver e avaliar uma metodologia simplificada para detecção de vírus entéricos humanos em lodo de esgoto. O método foi baseado em eluição viral com solução protéica, seguida de ultracentrifugação. Alguns parâmetros foram avaliados (tempo e pH de eluição, condições de clarificação e purificação). A seguir, foi aplicado
Publicado em: 2008
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41. Detection of calicivirus from fecal samples from children with acute gastroenteritis in the West Central region of Brazil
The objective of this study was to describe the circulation of caliciviruses in the West Central region of Brazil and its correlation with children's gender and age, as well as with the year and months of the sample collection. Reverse transcriptase-polymerase chain reaction was performed to detect the human calicivirus genome in 1006 fecal samples that were
Memórias do Instituto Oswaldo Cruz. Publicado em: 2006-11
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42. Molecular detention and characterization of astrovirus and norovirus in cases of acute gastroenteritis in children hospitalized in the city of Rio De Janeiro / Detecção e caracterização molecular de astrovírus e norovírus em casos de gastroenterite aguda em crianças hospitalizadas no município do Rio de Janeiro
Acute viral gastroenteritis is responsible for significant morbidity and mortality among children and human astrovirus (HAstV) and norovirus (NV) have been identified increasingly worldwide as agents of those infections. The goals of this study were to determine the prevalence and molecular characterization of HAstV and NV by reverse-transcription polymerase
Publicado em: 2006
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43. Noroviruses associated with acute gastroenteritis in a children's day care facility in Rio de Janeiro, Brazil
Noroviruses (Norwalk-like viruses) are an important cause of gastroenteritis worldwide. They are the most common cause of outbreaks of gastroenteritis in the adult population and occur in nursing homes for the elderly, geriatric wards, medical wards, and in hotel and restaurant settings. Food-borne outbreaks have also occurred following consumption of contam
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-03
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44. Replication of Norovirus in Cell Culture Reveals a Tropism for Dendritic Cells and Macrophages
Noroviruses are understudied because these important enteric pathogens have not been cultured to date. We found that the norovirus murine norovirus 1 (MNV-1) infects macrophage-like cells in vivo and replicates in cultured primary dendritic cells and macrophages. MNV-1 growth was inhibited by the interferon-αβ receptor and STAT-1, and was associated with e
Public Library of Science.
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45. Precise Characterization of Norovirus (Norwalk-Like Virus)-Specific Monoclonal Antibodies with Broad Reactivity
We have been characterizing monoclonal antibodies against Norovirus (Norwalk-like virus). In the course of our study, two monoclonal antibodies generated against Norovirus genogroup II capsid protein were found to react not only to genogroup II but also to genogroup I recombinant capsid proteins. In addition, we showed that these two monoclonal antibodies re
American Society for Microbiology.
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46. Cellular and Humoral Immunity following Snow Mountain Virus Challenge
Little is known about the immune response to noroviruses. To elucidate the immunobiology of norovirus infection in humans, 15 volunteers were challenged with Snow Mountain virus (SMV), a genogroup 2 norovirus. We assessed the cellular and humoral immune response and infection by analyzing stool, serum, saliva, and peripheral blood mononuclear cell (PBMC) res
American Society for Microbiology.
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47. Norovirus Proteinase-Polymerase and Polymerase Are Both Active Forms of RNA-Dependent RNA Polymerase
In vitro mapping studies of the MD145 norovirus (Caliciviridae) ORF1 polyprotein identified two stable cleavage products containing the viral RNA-dependent RNA polymerase (RdRp) domains: ProPol (a precursor comprised of both the proteinase and polymerase) and Pol (the mature polymerase). The goal of this study was to identify the active form (or forms) of th
American Society for Microbiology.
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48. Genetic Diversity of Norovirus and Sapovirus in Hospitalized Infants with Sporadic Cases of Acute Gastroenteritis in Chiang Mai, Thailand
Stool specimens from hospitalized infants with sporadic gastroenteritis in Chiang Mai, Thailand, between July 2000 and July 2001 were examined for norovirus and sapovirus by reverse transcription-PCR and sequence analysis. These viruses were identified in 13 of 105 (12%) specimens. One strain was found to be a recombinant norovirus.
American Society for Microbiology.