Serogroups O1 And O139
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Acesso ao Saneamento básico e Incidência de Cólera: uma análise quantitativa entre 2010 e 2015
RESUMO As condições de saneamento básico são um dos principais determinantes nos índices de agravos à saúde humana, principalmente no tocante a doenças infectocontagiosas por veiculação hídrica. Dentre todas, destacamos neste trabalho a cólera: doença entérica causada pelas cepas toxigênicas do Vibrio cholerae (sorogrupos O1 e O139), que é ca
Saúde debate. Publicado em: 13/01/2020
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2. A associação entre o zooplâncton e Vibrio cholerae O1 e O139 no complexo estuarino de Santos - Bertioga e Plataforma adjacente / The association between zooplankton and Vibrio cholerae O1 and O139 on Santos-Bertioga estuarine system and adjacent shelf
Vibrio cholerae is an autochthonous bacterium in the sea and may cause serious health problems when pathogenic strains are accidentally ingested. V. cholerae are found associated with copepods in concentrations up to a thousand times higher than the free bacteria in the water. If ingested, a single copepod may have enough bacteria necessary for human infecti
Publicado em: 2007
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3. Evidence for the Emergence of Non-O1 and Non-O139 Vibrio cholerae Strains with Pathogenic Potential by Exchange of O-Antigen Biosynthesis Regions
The novel epidemic strain Vibrio cholerae O139 Bengal originated from a seventh-pandemic O1 El Tor strain by antigenic shift resulting from homologous recombination-mediated exchange of O-antigen biosynthesis (wb*) clusters. Conservation of the genetic organization of wb* regions seen in other serogroups raised the possibility of the existence of pathogenic
American Society for Microbiology.
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4. Molecular Analysis of Non-O1, Non-O139 Vibrio cholerae Associated with an Unusual Upsurge in the Incidence of Cholera-Like Disease in Calcutta, India
There was an inexplicable upsurge in the incidence of non-O1, non-O139 Vibrio cholerae among hospitalized patients admitted to the Infectious Diseases Hospital, Calcutta, India, between February and March 1996. Of the 18 strains of V. cholerae isolated during this period, 15 belonged to the non-O1, non-O139 serogroups (4 belonged to O144, 3 belonged to O11,
American Society for Microbiology.
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5. Rapid screening method for identification of cholera toxin-producing Vibrio cholerae O1 and O139.
A novel method of identifying cholera enterotoxin (CT)-producing Vibrio cholerae serogroups O1 and O139 was developed. The method uses degradation of NAD as a specific biochemical marker for the CT-producing strains. The substrate NAD at a concentration of 100 mumol/liter was markedly degraded when it was incubated at 37 degrees C for 2 h with the CT-produci
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6. Cloning and Sequencing of the Genes Downstream of the wbf Gene Cluster of Vibrio cholerae Serogroup O139 and Analysis of the Junction Genes in Other Serogroups
The DNA sequence of the O-antigen biosynthesis cluster (wbf) of a recently emergent pathogen, Vibrio cholerae serogroup O139, has been determined. Here we report the sequence of the genes downstream of the O139 wbfX gene and analysis of the genes flanking the wbf gene cluster in other serogroups. The gene downstream of wbfX, designated rjg (right junction ge
American Society for Microbiology.
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7. Characterization of phenotypic, serological, and toxigenic traits of Vibrio cholerae O139 bengal.
Biochemical and physiological traits of a collection of strains of Vibrio cholerae O139 Bengal isolated from India, Bangladesh, and Thailand showed that these strains formed a phenotypically homogeneous group with identical characteristics that were essentially similar to those of the O1 serogroup. Resistance to 150 micrograms of the vibriostatic agent O/129
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8. Comparative Genomic Analyses of the Vibrio Pathogenicity Island and Cholera Toxin Prophage Regions in Nonepidemic Serogroup Strains of Vibrio cholerae
Two major virulence factors are associated with epidemic strains (O1 and O139 serogroups) of Vibrio cholerae: cholera toxin encoded by the ctxAB genes and toxin-coregulated pilus encoded by the tcpA gene. The ctx genes reside in the genome of a filamentous phage (CTXφ), and the tcpA gene resides in a vibrio pathogenicity island (VPI) which has also been pro
American Society for Microbiology.
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9. Evaluation of DNA probes for specific detection of Vibrio cholerae O139 Bengal.
Two DNA probes, 2R1 and 2R3, prepared from a region in the chromosome specific for the lipopolysaccharide O side chains of Vibrio cholerae O139 (M.K. Waldor and J.J. Mekalanos, Lancet 343:1366, 1994) were examined for their specificity and sensitivity. Both probes did not hybridize with any strain of V. cholerae belonging to serogroups other than O139 and to
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10. Detection of genes for fimbrial antigens and enterotoxins associated with Escherichia coli serogroups isolated from pigs with diarrhea.
A total of 1,226 Escherichia coli strains isolated from 1979 to 1989 from pigs with diarrhea were examined for serogroup and fimbrial antigen F4 (K88) production. Four main patterns of isolation of the various serogroups were observed, depending on the ages of the pigs from which isolates were obtained and the production of F4. In pattern I, serogroups O8:K"
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11. Comparison of the vibriocidal antibody response in cholera due to Vibrio cholerae O139 Bengal with the response in cholera due to Vibrio cholerae O1.
Vibrio cholerae serogroup O139, now considered to be the second organism capable of causing epidemic severe dehydrating cholera, contains a capsular polysaccharide which makes it difficult for it to be used in the conventional vibriocidal antibody assay optimized for V. cholerae O1. After modification of the procedure, which involved the use of specific bact
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12. Use of Representational Difference Analysis To Identify Genomic Differences between Pathogenic Strains of Vibrio cholerae
Representational difference analysis (RDA) is a recently developed technique used for amplifying genetic differences between two closely related genomes. We compared RDA and a modified version of RDA to examine genomic differences between the two Vibrio cholerae serogroups that cause epidemic cholera, O1 and O139, and between the two biotypes of the O1 serog
American Society for Microbiology.