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Showing 1 to 20 of 38 for “"V. cholerae"”.
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Feeding Strategies Based on Probing Control for E. coli and V. cholerae Cultivations
… it is implemented with good results also in V. cholerae cultivations, which shows how general the strategy is. Also, a model of a bio-reactor operating in fed-batch mode is presented and verified. The effect on the tuning rules of the probing controller is investigated. The probing feeding …
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Exploring the genomic and phenotypic diversity of the Vibrio cholerae species
Vibrio cholerae is the aetiological agent of cholera, an acute diarrhoeal disease which is estimated to result in up to 143,000 deaths per annum. Cholera is a considerable public health concern because it can spread rapidly in and explosive pandemics. Current pandemic cholera is caused by a …
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<i>Vibrio cholerae</i> non-01 and <i>V. mimicus</i> in diarrhoeal disease : a study of virulence factors
<i>Vibrio cholerae</i> non-01 and <i>V. mimicus</i>, isolated from clinical and environmental sources, were examined for factors related to virulence. The aim was to identify factors which would distinguish pathogenic from non-pathogenic strains and to establish a correlation, if any, with …
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Molecular and functional characterization of the melanin biosynthetic genes from Vibrio cholerae 569B
V. cholerae 569B is a bacterium infamous for its role as the causative agent of the diarrhoeal disease cholera. Although the bacterium occurs naturally in brackish waters and estuaries, cholera outbreaks are closely linked to specific environmental conditions. For example, most outbreaks occur …
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Roles for multiple iron acquisition systems in Vibrio cholerae
Vibrio cholerae is a highly successful human pathogen and environmental organism. To thrive in these diverse environments, it must encode the tools necessary to acquire essential nutrients such as iron. A number of V. cholerae iron acquisition systems have been identified, and altogether are …
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Gene Regulation by a Novel Two-Component System Conserved Among Gammaproteobacteria
… two-component system, CrbRS, in <em>Vibrio cholerae.</em> In <em>V. cholerae</em> CrbRS regulates acetate metabolism and controls virulence. The aim of this study is to determine whether a homologous two-component system present within our model organisms regulates similar genes within …
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Development of Water and Wastewater Biofiltration Technologies for the Developing World using Locally Available Packing Media: Case Studies in Vietnam and Haiti
… to deadly pathogens such as <italic>Vibrio cholerae</italic>, <italic>Shigella</italic>, and <italic>Salmonella</italic>, such as those living in Haiti as <italic>Vibrio cholerae</italic> is now ubiquitous (Enserink, 2010). On the sanitation side, more than 2.5 billion people in the world …
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Bedeutung der Lipopolysaccharidstrukturen bei pathogenen Vibrio cholerae Stämmen für die Ausbildung von Cholera und Abgrenzung zu Umweltisolaten
… über 200 verschiedene Serogruppen von V. cholerae bekannt sind, wurden Ausbrüche der Cholera hauptsächlich von Stämmen der unbekapselten Serogruppe O1 und der bekapselten Serogruppe O139 verursacht. Die Komponenten des Lipopolysaccharids (LPS) von O1 und O139, sowie die Kapsel von O139 …
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Optimization of a Method for Testing Ballast Water for Enterococci and an Investigation on the Occurrence of Antibiotic Resistance in Vibrio cholerae
… Being the etiological agent of cholera, V. cholerae is a major public health problem in several developing countries. The prevalence of β-lactamase-producing strains and their isolation from life-threatening infections as well as the environment is alarming and presents a major therapeutic …
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Analysis of the vlpA genes and their roles in the pathogenesis of Vibrio cholerae O139 / Pranom Kaewrakon.
A mutant lacking Vibrio cholerae lipoprotein A activity has been constructed in V. cholerae O139 which contains two copies of vlpA, by allelic exchange after inactivation via the insertion of kanamycin and tetracycline resistance gene cartridges. The vlpA-negative mutant has been assessed for …
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The role of melanin production in the survival of Vibrio cholerae in the marine environment
The marine bacterium Vibrio cholerae produces pyomelanin through the catabolism of L-tyrosine to homogentisic acid. Various types of melanins are used by microbes as defense mechanisms against a variety of environmental stresses. This thesis investigated the defensive role of V. cholerae pyomelanin …
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Screening and Characterization of Antimicrobial Compounds and Material against Vibrio cholerae
… the terror of the post-antibiotic era. Vibrio cholerae, the cholera-causing pathogen, is no exception to the menace of multi-drug resistance. Strains from worldwide outbreaks have shown resistance to all antibiotics used to treat cholera, including ciprofloxacin. With cholera being prevalent in …
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Novel approaches to mucosal vaccine development Strategies in vaccine antigen production, construction of a novel mucosal adjuvant and studies of its mode of action
… carrying the non-homologous lgt gene from V. cholerae. A similar V. cholerae lgt-deleted strain was also constructed using the E. coli lgt gene for complementation. The strains had similar growth and production characteristics as their wild-type counterparts but maintained their expression …
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Molecular Epidemiology and Evolution of Corynebacterium diphtheriae and Vibrio cholerae
… of Corynebacterium diphtheriae and Vibrio cholerae Robert C. Will The infectious diseases diphtheria and cholera affect thousands of people around the world every year, and are caused by the bacterial species Corynebacterium diphtheriae and Vibrio cholerae respectively. While the two …
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Vibrio cholerae Phage K139
… sich nach bisherigen Erkenntnissen auf V. cholerae Stämme der Serogruppen O1 und O139 beschränkt. Als Rezeptor dient ihm dabei das O1 Lipopolysaccharid (LPS), Morphologisch ist er der Familie der Myoviridae zuzurechnen, innerhalb des Klassifikations-Schemas der Vibriophagen den …
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Mechanisms For Bicarbonate-Mediated Virulence In vibrio Cholerae
<p> <i>Vibrio cholerae</i> is the etiologic agent of the severe diarrheal disease cholera. The aquatic bacterium is ingested by humans through contaminated water or food. Disease initiation depends on the production of the major virulence factors: cholera toxin (CT) and the toxin co-regulated pilus …
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Functional Characterization Of The Cholera Toxin Promoter Of vibrio Cholerae
<p> <i>Vibrio cholerae</i> is the bacterium responsible for the severe diarrheal disease cholera. The disease is directly caused by cholera toxin, which is secreted by the bacterium in the upper small intestinal lumen during the course of infection. Expression of cholera toxin, along with other …
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Modeling species geographic distributions in aquatic ecosystems using a density-based clustering algorithm
… conditions and presence reports using Vibrio cholerae, a well-understood aquatic bacterium species in coastal waters globally (Chapter 2). Second, using V. cholerae as a model system, I developed detailed parameterizations of density-based clustering models to determine the parameter values …
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An Investigation of Cytochrome Bd Quinol Oxidases of Vibrio Cholerae, Rhodobacter Sphaeroides, and Salmonella Typhimurium
… of the tri-heme family in R. sphaeroides and V. cholerae. Combining spectroscopy and activity studies with recombinant gene expression and mutagenesis, it was shown that these two organisms might harbor an oxidase that is distinct from the bd-I oxidase of E. coli . Chapter five lays out the …
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The role of the Vibrio cholerae Type VI secretion system during kin cell interaction, biofilm formation and priority effects
<p><em>Vibrio cholerae’s </em>Type VI secretion system (T6SS) is one of the arsenals used by the bacteria for its long-term survival in different environments, against a variety of opponents, and for its maintained pathogenicity in vulnerable regions of the world. Therefore, the more we understand …
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