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Bacterial Predation in Host Microbiomes

Creator:: Welsh, Rory M.
Abstract:: In host-associated microbiomes, the mechanisms that regulate community composition or the principles that govern dynamics remain far from clear. However, understanding how the structure of microbial communities shift as the system moves away from a healthy state is critical to assessing disease progression and to formulate any potential mitigation strategy....
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Rory M. Welsh for the degree of Doctor of Philosophy in

Species- and Temporal-Specific Coral Microbiome Fluctuations in Response to a Natural Bleaching Event

Creator:: Ewton, Erica M.
Abstract:: Corals provide a diversity of ecosystem services, are among the most biologically diverse ecosystems on Earth, and directly support ~500 million people globally; however, corals are increasingly experiencing significant threats and are undergoing severe bleaching events as the result of the warming climate. Using a two-year data set surrounding a...
Resource Type:: Masters Thesis
Full Text:: in Micronesia and discovered that recovery rates were initially higher at 10 m compared to 3 m when

Characterization of germination of Clostridium perfringens spores from various sources

Creator:: Alnoman, Maryam M.
Abstract:: Clostridium perfringens is a pathogenic anaerobic bacterium able to produce more than 17 toxins, allowing C. perfringins to cause a wide variety of diseases in humans and animals. Beside toxins production, C. perfringens able to form a highly resistance spores can survive in the environments for years. These spores are...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Maryam M. Alnoman for the degree of Master of Science in

Reef Microbiomes of Mo'orea, French Polynesia, a Socio-Ecological Island System

Creator:: McConnell, Kaitlin M.
Abstract:: At a time of rapid global change, a socio-ecological system (SES) approach can provide a framework through which to quantify and communicate the risks and uncertainties of coupled human-natural systems. Islands, and tropical coral reef islands in particular, can be excellent models for SES research since they may be considered...
Resource Type:: Masters Thesis

Characterization of Mycobacterium avium subsp. hominissuis Interactions with Host Macrophages and Multinucleated Giant Cells

Creator:: Joseph, Jayanthi J.
Abstract:: To examine the macrophage response to M. avium, I compared inflammasome and cytosolic sensor expression and activation. My result demonstrated that virulent strains of M. avium (A5 and 104) suppress IL-1β production and induce IFN-β production in macrophages. M. avium mutants deficient at DNA export in the biofilm exhibited reduced...
Resource Type:: Dissertation
Full Text:: : _____________________________________________________________________ Luiz E. Bermudez Mycobacterium avium subsp. hominissuis (M. avium) is a

Substrate capture by a psychrophilic marine bacterium

Creator:: Geesey, G. G.
Abstract:: Cells of the marine bacterium, Ant-300, accumulate loosely bound amino acids during amino acid uptake. The fraction of amino acid taken up that exists in the loosely bound state depends on the substrate in question. Shock treatment studies indicate that, in general, the initial binding, uptake, and retention of amino...
Resource Type:: Dissertation
Full Text:: components with kine- tic constants of 1.2 x 10 -8 and 4.5 x 10 -7 M. These mechanisms enable Ant-300 to

Characterizing the Accuracy of Phylogenetic Analyses that Leverage 16S rRNA Sequencing Data

Creator:: Humphreys, Ian R.
Abstract:: Investigations of 16S rRNA gene sequences hallmark modern microbiology. These sequences provide culture-independent insight into the abundance and distribution of microbiota and serve as a principle resource through which microbial community diversity is measured. Consequently, researchers rely on 16S gene sequences to test hypotheses rooted in ecology, evolution, and disease....
Resource Type:: Masters Thesis
Full Text:: 1998), improve branch-length calculations (Rosenberg and Kumar 2003), and more accurately represent

What is killing the corals? Viral and bacterial interrogations using metagenomics and microscopy

Creator:: Soffer, Nitzan
Abstract:: Corals have multiple roles in maintaining ocean health and are some of the world’s most diverse ecosystems. The coral animal is host to a multitude of taxa, including symbiotic dinoflagellate algae, fungi, bacteria, protists, and viruses. Environmental stressors and disease agents can perturb the delicate balance of the coral host...
Resource Type:: Dissertation
Full Text:: ; Bourne et al., 2009; Rosenberg and Kushmaro, 2011), and new ones are being discovered to date, such as

Purification and characterization of R. meliloti RNA polymerase from wild type and mutant strains, and the role of the enzyme in the specificity of in vitro transcription of nitrogen fixation genes

Creator:: Nielsen, Brent L.
Resource Type:: Dissertation
Full Text:: as assayed on plasmid pRK290 11. Purification of individual polypeptides from the 0.45 M KC1

Impacts of Environmental Change on a Newly-characterized Symbiosis between a Novel Bacterial Parasite, Genus Aquarickettsia, and the Coral Acropora cervicornis

Creator:: Klinges, J. Grace
Abstract:: Coral reef ecosystems continue to be significantly altered by disease epizootics, but why some host populations remain resistant while others succumb to outbreaks remains unknown. Research across diverse animal and plant host systems has revealed that disease severity is strongly influenced by host genetics and by environmental influences on both...
Resource Type:: Dissertation
Full Text:: , and carbonate skeleton) (Pollock et al., 2018; Glasl et al., 2016; Rosenberg et al., 2007). These

ScholarsArchive@OSU

Bacterial Predation in Host Microbiomes

Species- and Temporal-Specific Coral Microbiome Fluctuations in Response to a Natural Bleaching Event

Characterization of germination of Clostridium perfringens spores from various sources

Reef Microbiomes of Mo'orea, French Polynesia, a Socio-Ecological Island System

Characterization of Mycobacterium avium subsp. hominissuis Interactions with Host Macrophages and Multinucleated Giant Cells

Substrate capture by a psychrophilic marine bacterium

Characterizing the Accuracy of Phylogenetic Analyses that Leverage 16S rRNA Sequencing Data

What is killing the corals? Viral and bacterial interrogations using metagenomics and microscopy

Purification and characterization of R. meliloti RNA polymerase from wild type and mutant strains, and the role of the enzyme in the specificity of in vitro transcription of nitrogen fixation genes

Impacts of Environmental Change on a Newly-characterized Symbiosis between a Novel Bacterial Parasite, Genus Aquarickettsia, and the Coral Acropora cervicornis

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