Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 98 for “"virulence genes"”.
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Molecular typing of virulence genes in enterotoxigenic Bacillus cereus
… and 101 cfu/ml. In order to detect the multiple virulence determinants in pathogenic B. cereus, specific primers were used to target three enterotoxigenic genes (hblC, nheA, and hblA), followed by melt-curve analysis to confirm identity. Conditions used for this experiment allowed for the …
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Ecology of virulence genes in the human pathogen Streptococcus pneumoniae.
… a new pneumococcal vaccine targeting a protein virulence factor possessed by all pneumococci, which would afford cross-serotype protection. As a result, it is important to assess the diversity of pneumococcal virulence factors in order to determine their potential as vaccine candidates, as …
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Post-Transcriptional Regulation of Virulence Genes by GlmY and GlmZ in Enterohemorrhagic E. Coli
… (HUS) throughout the world. One of the major virulence factors in this pathogen is a type III secretion system (T3SS) encoded by the locus of enterocyte effacement (LEE). EHEC uses this proteinaceous needle to inject effector proteins into host cells to hijack various host cellular processes, …
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Detection of virulence genes and antimicrobial resistance genes in staphylococci isolated at Malamulo hospital in Malawi.
… fund. The study aimed at detecting selected virulence and AMR genes in 36 Staphylococci bacteria stocked between December 2021 and May 2022 for a molecular AMR surveillance. Sample source types included blood (16), urine (14), pus (three), skin wedge (one), pleural fluid (one), and ascitic …
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Detection of virulence genes and antimicrobial resistance genes in staphylococci isolated at Malamulo hospital in Malawi.
… fund. The study aimed at detecting selected virulence and AMR genes in 36 Staphylococci bacteria stocked between December 2021 and May 2022 for a molecular AMR surveillance. Sample source types included blood (16), urine (14), pus (three), skin wedge (one), pleural fluid (one), and ascitic …
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Multiple virulence genes and other MRNA regulatory targets are differentially expressed in two Helicobacter pylori strains overexpressing small RNAs
… genetic regulation necessary for these and other virulence traits is complicated by a relative lack of regulatory proteins in H. pylori, its wealth of small RNAs (sRNAs) may also regulate mRNAs, including in the cagPAI. The nascent body of work in H. pylori sRNAs supports consequential roles for …
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Characterization of the grvA and grvB Anti -Virulence Genes Encoded by the Gifsy-2 and Gifsy -1 Bacteriophages of Salmonella Typhimurium
… contribute significantly to S. typhimurium virulence. We have been studying biology of these phage to determine the effects of Gifsy-1 and Gifsy-2 on the virulence of S. typhimurium. The Gifsy-2 phage carries the periplasmic superoxide dismutase gene, sodCI. Using the IVET system, we …
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CHARACTERIZING THE ROLE OF PUTATIVE VIRULENCE GENES ASSOCIATED WITH INFECTION, COLONIZATION AND PERSISTENCE OF SALMONELLA ENTERITIDIS IN CHICKEN USING A BIOLUMINESCENT REPORTER
… insights into the fitness advantages of various virulence genes which were hitherto not well characterized in chicken. For the first time, utilizing BLI, we identified candidate virulence that can significantly impact yolk sac colonization/infection. The virulence profile of SEn during yolk sac …
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Ochrobactrum anthropi: a soil bacterium for the study of Brucella virulence
… Brucella is that they do not express classic virulence factors. Thus identification of virulence factors has been elusive and some of the identified virulence genes are putative. Disruption of putative virulence genes and studying the consequent effect on attenuation in cell lines or mouse …
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Isolation and taxonomic analysis of Bacillus species in Anthrax negative cases at Central Veterinary Laboratory, Namibia
… in Bacillus anthracis that encode for toxin genes while in some cases anthrax-like etiologic agents have not been investigated for virulence genes. In some instances, however, anthrax-like etiologic agents harbor virulence genes different from those of B. anthracis yet still cause …
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Genetic and phenotypic diversity of bloodstream associated Staphylococcus epidermidis isolates obtained from private and public hospitals in South Africa
… on the prevalence of antibiotic resistance, virulence genes and clonality of S. epidermidis is available. In attempts to bridge this information gap, this study used phenotypic and genotypic methods to investigate the genetic diversity and genetic relatedness of bloodstream associated S. …
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Determination of the occurrence, virulence genes, and antimicrobial resistance profiles of enterococcus faecalis and enterococcus faecium isolated from poultry of Chongwe, Lusaka, Kitwe, and Ndola districts, farmworkers from the Copperbelt province poultry farms and clinical specimens from Kitwe teaching hospital in Zambia.
… The study aimed to determine the occurrence, virulence genes, and antimicrobial resistance profiles of Enterococcus faecalis and Enterococcus faecium isolated from poultry of Chongwe, Lusaka, Kitwe, and Ndola Districts, Farmworkers from the Copperbelt Province Poultry Farms, and Clinical …
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Identification of the virulence gene of Mycobacterium tuberculosis
… is to identify and characterize potential virulence genes from M. tuberculosis. To this end, we have compiled and integrated information from various public databases to catalogue 246573 microbial genes from 84 organisms, including pathogens and non pathogenic microbes. We determined the …
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Epidemiología molecular de Staphylococcus spp. desde un enfoque One Health: genes emergentes e inusuales de resistencia a antibióticos y de virulencia
… emergent and unusual antibiotic resistance and virulence genes. Staphylococcus spp. isolates recovered from tracheal samples of 242 wild birds were characterized. SCoP were recovered from 8.3% of wild birds tested, and the isolates were identified as S. aureus (n=9) and S. delphini (n=12). Most …
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A citywide, clonal outbreak of Pseudomonas aeruginosa during a drought
… were used to determine clonality and identify virulence genes. A modified case-control study in a subset of patients with bloodstream infection compared demographic and clinical characteristics between sequence types. Results The outbreak lasted 10 months from December, 2016 to September, 2017 …
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Characterization of Clinical and Commensal Escherichia coli Isolates from an Integrated Turkey Operation
… antigen serologic testing and PCR for potential virulence genes were conducted on 299 strains including all clinical isolates and fecal isolates that had similar traits to clinical isolates. Most avian E. coli infections were caused by a few clonal strains that were uncommon in normal fecal …
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Bacteriocinogenic potential of lactic acid bacteria isolates from artisanal fermented meat products
… and 31 and the detection of bacteriocins related genes were performed; L. curvatus 12 and 36 e W. viridescens 23 were selected for the other analysis to evaluate the bacteriocinogenic potential. The selected isolates showed distinct growth and bacteriocin production was more evident in L. curvatus …
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Prevalence, virulence factors and antimicrobial resistance of salmonella species from beef in retail outlets from KwaZulu-Natal province, South Africa
… aimed at determining the prevalence, serovars, virulence factors and antimicrobial resistance patterns of Salmonella recovered from various beef products. Four hundred beef products (n = 169 organ meats, n = 110 raw processedmeats, n = 53 raw intactmeatsand n = 68 ready-to-eat meats) were …
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CONTRIBUTIONS OF SIGMA-B AND PRFA TO STRESS RESPONSE AND VIRULENCE GENE EXPRESSION IN LISTERIA MONOCYTOGENES
… food borne bacterial pathogen Listeria monocytogenes has several mechanisms for regulating expression of stress response and virulence genes. The alternative sigma factor sigmaB is a global regulator of genes active under environmental stress conditions and during stationary phase growth. I …
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