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 9 of 9 for “"Viable but nonculturable"”.
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A study of the relationship between viability, culturability and virulence in environmental populations of Legionella pneumophila
… have observed that bacteria can enter into a viable but nonculturable state. In order to study this phenomenon in Legionella pneumophila, a model hot water system was constructed to serve as a source of planktonic and biofilm cells. Both planktonic and biofilm L. pneumophila existed primarily …
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Improved Detection Methods for Selected Vibrio Species in the Marine Aquatic Environment
… of <em>V. parahaemolyticus</em> in the viable but nonculturable state. This dormant state prevents the bacteria from being enumerated by standard methods. The work presented here allows enumeration of the bacteria from environmental waters in total, and when coupled with other methods, …
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The identification and characterization of novel persistence genes in chlamydia trachomatis
… starvation induces C. trachomatis to enter a viable-but-nonculturable state termed persistence, which has been proposed to play a key role in chronic Chlamydial disease. To circumvent host induced tryptophan depletion, urogenital strains of C. trachomatis encode a functional tryptophan …
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A Study of the Coccoid Bodies of Prolinoboborus fasciculus (Aquaspirillum fasciculus)
… conversion from its culturable rod form to a nonculturable coccoid form. Chloramphenicol did not prevent the conversion. Attempts to obtain variants that would not convert to the coccoid form were unsuccessful. Although the coccoid form fluoresced with acridine orange, agarose gel …
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A study of the coccoid form and the autolysins of <i>Campylobacter upsaliensis</i>
… of <i>Campylobacter upsaliensis</i> to the nonculturable but viable coccoid form was characterized. Chloramphenicol did not prevent the conversion. Severe decreases in isocitrate dehydrogenase activity and oxygen uptake and extensive degradation of ribosomal RNA suggest that the coccoid form …
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Fate of Antibiotic Resistance Genes During Anaerobic Digestion of Wastewater Solids
… ambient and mesophilic temperature environments. Viable but nonculturable (VBNC) states are initiated by thermal treatments, such as thermophilic digestion and possibly pasteurization, and allow the persistence of pathogen cells and any ARGs contained therein through treatment and into the …
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Survival and recovery of Escherichia coli O157:H7 during starvation at sub-optimal temperatures
… are known to induce bacterial entrance into the viable but non-culturable (VBNC) state where cell viability can only be detected using culture-independent methods with the number of colonies recovered decreasing over the duration of the starvation period. Findings from this study showed that …
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Novel techniques for the in situ detection of bacteria on salad leaf surfaces
… and quantify both indigenous leaf bacteria and viable human pathogens on salad leaves, without the need for recovery and culture, which may reduce the accuracy of quantification. The methods developed could then be used to quantify the number of indigenous and inoculated bacteria in situ on …
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Molekularbiologische Studien zur Pathogenität und Ökologie von Legionella pneumophila
… aber nicht mehr kultivierbares Ruhestadium (viable but nonculturable, VBNC) eintreten kann. Parallel zur Ermittlung der CFU-Werte wurden während des Verlaufs der Experimente die Lebendzellzahlen durch Fluoreszenzfärbungen bestimmt. Der Übergang von L. pneumophila in das VBNC-Ruhestadium wurde …