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 13 of 13 for “"ribotype"”.
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A clinical and molecular analysis of Clostridium difficile strains isolated from Groote Schuur Hospital
… identified all the A-B+ strains as PCR ribotype 017, which was the prevalent strain type (47%). Genotyping based on the tcdC gene and MLVA both grouped the ribotype 017 strains in a single clade. The antimicrobial susceptibility of all the isolates to metronidazole (MET), vancomycin …
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Clostridium difficile: expression of virulence factors, resistance to disinfectants and interactions with human cells
… VPI 10463, a reference strain, the hypervirulent ribotype 027 and the current locally endemic ribotypes 001 and 106. The first study focussed on the growth-related phenotypic and genotypic expression of virulence factors in C. difficile. Growth was studied over twenty-four hours, with simultaneous …
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Prevalence and fate of Clostridium difficile during sewage treatment, land application and composting
… sediment samples where effluent was discharged. Ribotype 078 which is commonly associated with community associated C. difficile infection (CA-CDI) was recovered from 19% of primary sludge (21/108), 8% of digested sludge (8/106), 35% of biosolids (15/43) and 60% of river samples (15/25). The …
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Phenotypic and genotypic characterisation of Clostridium Difficile
… the developed world. Hypervirulent strains (PCR ribotype 027) of C. difficile which produce enhanced levels of toxins have also been associated with other characteristics such as a greater rate of sporulation and resistance to fluoroquinolones. Infection due to C. difficile PCR ribotype 027 has …
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Bacterial Source Tracking in the Sinking Creek Watershed Using Antibiotic Resistance Analysis and Ribotyping.
… Creek. ARA classification rates were low, and ribotype pattern generation success was 37%. The results of this study bring into question the reliability and reproducibility of these 2 source tracking methods for routine use in small watersheds.</p>
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Mating interactions of the harmful dinoflagellate alexandrium tamarense from UK coastal waters
… catenella grouped according to ribosomal DNA or ‘ribotype’. There are five ribotype type groups (I-V) each consisting entirely of toxic or non-toxic isolates. Toxic isolates are associated with harmful algal blooms (HAB’s) due to their ability to produce powerful neurotoxins, which are responsible …
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Correlation between phenotypes or genotypes of Clostridium difficile and clinical outcome from Clostridium difficile infections at Health Sciences North
… presence of the toxin genes and classified by ribotype. They were also tested for antibiotic susceptibility (E-test), toxin production levels, and microbial spore load in stools. The patients symptoms were evaluated to determine if there were any correlations between the genotypes/phenotypes …
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Longitudinal study of Salmonella enterica, Escherichia coli O157:H7, and Listeria monocytogenes in a small and very small fresh meat processing plant environment
… isolates recovered from Plant 1 belonged to ribotype DUP-1042B, which was recovered up to five times from 15 different sampling sites across the facility; the remaining two isolates belonged to ribotype DUP-1057B. Noteworthy, ribotype DUP-1042B belongs to a major human outbreak-associated …
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Towards Phage Therapy: Characterization of Clostridioides difficile Bacteriophages from a South African Strain Collection
… South African C. difficile isolates, focusing on ribotype 017, which has been identified in Western Cape hospitalised patients with tuberculosis. Using a bioinformatic approach, we extracted phage genomes from previously generated C. difficile genome assemblies, assessed genomic relatedness, …
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The competitive dynamics of toxic and non-toxic ribotypes of the harmful dinoflagellate Alexandrium tamarense in Scottish waters
… the non-saxitoxin producing (Group III) ribotypes of Alexandrium tamarense are present in Scottish waters, co-occurring in some locations. Shellfish toxicity events may have been in decline in recent years, possibly<br/>due to increasing presence of the benign Group III ribotypes. This …
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Analysis of toxic and non-toxic Alexandrium (Dinophyceae) species using ribosomal RNA gene sequences
… Eight major classes of LsrDNA sequences, termed "ribotypes," were identified. Five ribotypes subdivide members of the A. tamarense/catenella!fundyense complex; all isolates containing the B gene cluster as one ribotype. The three remaining ribotypes are typified by: 1) A. affine; 2) A. minutum and …
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Diversity of the butyrate-producing microflora of the human gut.
… enzyme Alu-I, which proved to give the best ribotype discrimination from a total selection of four restriction enzymes. A total of 18 Alu-I PCR-RFLP ribotypes were obtained for the 74 butyrate-producing isolates. The results indicate that the butyrate-producing flora of each individual …
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Microbial monitoring and degradation of lindane in soil
… although one soil contained a predominant ribotype, possibly selected by the HCH contamination. However, the latter population was not selected in the enrichment culture from that soil. Furthermore, DGGE analyses indicated that the isolates represented predominant populations in the …