Etec Enterotoxins
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Enterotoxins, colonization factors, serotypes and antimicrobial resistance of enterotoxigenic Escherichia coli (ETEC) strains isolated from hospitalized children with diarrhea in Bolivia
Enterotoxigenic Escherichia coli (ETEC) is recognized as the main cause of bacterial diarrhoea among children in Asia, Africa and Latin America but less investigated in Bolivia. OBJECTIVE: To determine the relation between enterotoxins, CFs and serotypes as well as the antimicrobial resistance patterns in a set of ETEC isolates collected from hospitalized ch
Brazilian Journal of Infectious Diseases. Publicado em: 2011-04
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2. Diversidade genética do óperon etx em amostras de Escherichia coli enterotoxigênica (ETEC): determinação da variabilidade das seqüências gênicas e capacidade de síntese da toxina termo-lábil (LT). / Genetic diversity of etx operon in enterotoxigenic Escherichia coli (ETEC) strains: determining the variability of gene sequences and the ability to synthesis of heat-labile toxin (LT).
Linhagens de Escherichia coli enterotoxigênica (ETEC) são consideradas como importante agente de diarréia, principalmente entre crianças e turistas em países em desenvolvimento. Entre os fatores de virulência expressos por ETEC, as enterotoxinas termo-lábil (LT) e termo-estável (ST) representam os mais relevantes fenótipos. Evidências preliminares
Publicado em: 2009
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3. Escherichia coli isolated from drinking water: fenotypic and genotypic characterization of virulence factors / Escherichia coli isoladas de agua de consumo : caracterização fenotipica e genotipica das propriedades de virulencia
Estudos de infecções causadas pela ingestão de águas contaminadas, em especial por Escherichia coli, são importantes para definir o papel dessas bactérias em casos de gastroenterites. Devido à ocorrência freqüente da diarréia infantil na cidade de Ouro Preto-MG, análises microbiológicas da sua água de consumo determinaram a presença de E. coli.
Publicado em: 2006
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4. Prevalence and association of the longus pilus structural gene (lngA) with colonization factor antigens, enterotoxin types, and serotypes of enterotoxigenic Escherichia coli.
Human enterotoxigenic Escherichia coli (ETEC) produces a plasmid-encoded type IV pilus termed longus (for long pilus). Regardless of the geographic origins of ETEC strains, the longus structural gene lngA was found to have the highest level of association with ETEC producing colonization factor antigen (CFA) CFA/II, followed by ETEC producing CFA/I and CFA/I
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5. Relative Importance of Heat-Labile Enterotoxin in the Causation of Severe Diarrheal Disease in the Gnotobiotic Piglet Model by a Strain of Enterotoxigenic Escherichia coli That Produces Multiple Enterotoxins†
Enterotoxigenic Escherichia coli (ETEC) strains that produce multiple enterotoxins are important causes of severe dehydrating diarrhea in human beings and animals, but the relative importance of these enterotoxins in the pathogenesis is poorly understood. Gnotobiotic piglets were used to study the importance of heat-labile enterotoxin (LT) in infection with
American Society for Microbiology.
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6. Identification of enterotoxigenic Escherichia coli by colony hybridization with nonradioactive digoxigenin-labeled DNA probes.
Enterotoxigenic Escherichia coli (ETEC) strains were readily identified in pure and mixed cultures with nonradioactive, digoxigenin-labeled DNA probes coding for heat-labile (LTI) and heat-stable (STaI, STaII, and STb) enterotoxins. Digoxigenin-labeled ETEC fragments were more sensitive than and exhibited less nonspecific background contamination than biotin
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7. Evaluation of antisera used for detecting enterotoxigenic Escherichia coli in Sao Paulo.
The usefulness of antisera in detecting enterotoxigenic Escherichia coli (ETEC) strains in Sao Paulo was evaluated. Polyvalent antisera detected 49% of ETEC isolates and were more effective in identifying E. coli that produced heat-labile and heat-stable enterotoxins and in strains that produced only heat-stable enterotoxin. ETEC strains not detected by the
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8. Trivalent heat-labile- and heat-stable-enterotoxin probe conjugated with horseradish peroxidase for detection of enterotoxigenic Escherichia coli by hybridization.
A 1,268-bp polynucleotide probe for heat-labile and heat-stable enterotoxins (LTh, STIa, STIb) was conjugated with horseradish peroxidase (HRP). The HRP-conjugated trivalent probe was applied to the detection of enterotoxigenic Escherichia coli (ETEC) by colony and stool hybridizations. The binding of the probe to its targets was assayed by the addition of H
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9. Genetic Rearrangements of the Regions Adjacent to Genes Encoding Heat-Labile Enterotoxins (eltAB) of Enterotoxigenic Escherichia coli Strains
One of the most common bacterially mediated diarrheal infections is caused by enterotoxigenic Escherichia coli (ETEC) strains. ETEC-derived plasmids are responsible for the distribution of the genes encoding the main toxins, namely, the heat-labile and heat-stable enterotoxins. The origins and transfer modes (intra- or interplasmid) of the toxin-encoding gen
American Society for Microbiology.
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10. Colorimetric detection of heat-labile toxin-encoding gene of enterotoxigenic Escherichia coli by PCR.
In the developing world, enterotoxigenic Escherichia coli (ETEC) strains which produce enterotoxins are a significant cause of morbidity and mortality. Heat-labile (LT) toxin PCR detection methods have been described, but they have limited applications in a routine laboratory setting. A colorimetric DNA method for the rapid amplification and detection of the
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11. Plasmids coding for colonization factor antigens I and II, heat-labile enterotoxin, and heat-stable enterotoxin A2 in Escherichia coli.
Colonization factor antigens I and II (CFA/I and CFA/II) are important in the pathogenesis of diarrhea in humans caused by some enterotoxigenic Escherichia coli (ETEC). Plasmid DNA from 16 CFA/I+ and five CFA/II+ ETEC were examined by Southern blot analysis with enterotoxin gene probes and were compared with plasmid DNA from derivatives of the same ETEC that
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12. Modulation of murine Peyer's patch immunoglobulin A response by enterotoxigenic Escherichia coli.
Enterotoxigenic Escherichia coli (ETEC) may have profound effects on the capacity of gut-associated lymphoid tissue to mount a secretory immune response because of the potential ability of heat-stable toxin or heat-labile toxin to modulate the immune response. To examine the effects of ETEC or its purified enterotoxins upon the humoral immune response of mur