Index Catalog // ScholarsArchive@OSU

Hydraulic predictors and seasonal distribution of Manayunkia speciosa density in the Klamath River, CA, with implications for ceratomyxosis, a disease of salmon and trout

Creator:: Jordan, Michelle S.
Abstract:: The freshwater polychaete Manayunkia speciosa was identified as an obligate host of the salmonid parasite Ceratomyxa shasta in 1997, prompting increased research on the small benthic invertebrate. Ceratomyxa shasta infection in fish can cause mortality, and presents a disease risk for both hatchery and wild salmon and trout. Ceratomyxa shasta...
Resource Type:: Masters Thesis
Full Text:: : Jerri L. Bartholomew, Gordon E. Grant The freshwater polychaete Manyaunkia speciosa was identified

Purification and properties of Streptococcus lactis β-galactosidase

Creator:: McFeters, Gordon A.
Abstract:: Experiments were carried out to purify and characterize the galactosidase of the Streptococcus lactis 7962. Purification was accomplished using standard procedures; however the lability of the enzyme to numerous treatments limited the techniques that could be used and the amount of active enzyme recovered. Gel filtration revealed that the enzyme...
Resource Type:: Dissertation
Full Text:: extract, 5 g; gelatin, 2.5 g; NaC1, 4.0 g; L ascorbic acid, 0.5 g; and water to 1.0 liter. This medium

A study of the function and physiological forms of ergosterol in Saccharomyces cerevisiae

Creator:: Adams, Bruce Gordon
Abstract:: A water-soluble complex containing ergosterol together with a component of yeast has been isolated. The complex can be isolated from commercial yeast extract to which ergosterol has been added or directly from whole yeast cells. The complexing agent from yeast extract is also capable of solubilizing cholesterol and a long...
Resource Type:: Dissertation
Full Text:: ergosterol in Saccharomyces cerevisiae AN ABSTRACT OF THE THESIS OF BRUCE GORDON ADAMS for the Ph. D

Preventing crown gall disease using oncogene silencing or VirE1-expressing transgenics

Creator:: Humann, Jodi L.
Abstract:: Crown gall disease is caused by the ubiquitous soil bacterium Agrobacterium tumefaciens which transfers a portion if DNA (T-DNA) into the plant cell. Preventing infection by using the biocontrol strain Agrobacterium radiobacter K84 is currently the only defense for crown gall. Two different resistance strategies were examined in this work....
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Jodi L. Humann for the

Isolation and characterization of a new subspecies of Mycobacterium chelonei infectious for salmonid fish

Creator:: Arakawa, Cindy Keiko
Resource Type:: Masters Thesis
Full Text:: Bozeman, Montana Mountain whitefish adult 1982 aisolated by Dr. J. L. Fryer b isolated by G. D. Frost

Physical and functional characterization of soluble protein antigen(s) produced by Renibacterium salmoninarum

Creator:: Turaga, Prasad S. D.
Abstract:: Renibacterium salmoninarum produces bacterial kidney disease (BKD) in salmonid fish. Soluble antigen(s) (SA) produced by the bacterium was characterized by physicochemical, functional and immunological methods. The molecular weight determination by SDS-PAGE analysis of SA yielded 14 different molecular weight species. Seven of these species were prominent, 57 kd protein being...
Resource Type:: Dissertation
Full Text:: . Ann. Rev. of Microbiology. 35:273-298. 2. Mitchum, D. L., Sherman, L. E., and G. T. Baxter. 1979

Evidence for molecular diversity of Piscirickettsia salmonis

Creator:: Mauel, Michael J.
Resource Type:: Dissertation
Full Text:: salmonis. Abstract approved: John L. Fryer Piscirickettsia salmonis is the etiologic agent of

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:: approved: ______________________________________________________ Rebecca L. Vega Thurber Abstract In

Bacterial flora in the Oregon moist pellet, a diet for salmonid fish

Creator:: Moffitt-Westover, Cheryl Louise
Resource Type:: Masters Thesis
Full Text:: change and averaged 4.8 x 107 CFU /g. After the equipment change, the bacterial count of 26 OMP samples

A study of corynebacterial kidney disease of salmonid fishes

Creator:: Rowse-Eagle, Debra H.
Abstract:: This study was undertaken to compile a comprehensive review of the literature and to gain a better understanding of the host-parasite relationship in corynebacterial kidney disease of salmonid fishes. An indirect fluorescent antibody technique was developed which allowed differentiation of intra- and extracellular bacteria. This technique was used in combination...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Redacted for privacy L. Fryy* This study was undertaken to compile a comprehensive

Development of monoclonal antibodies against the myxosporean, ceratomyxa shasta, and characterization of the salmonid host response

Creator:: Bartholomew, Jerri Lee
Abstract:: Monoclonal antibodies (Mabs) were produced against the myxosporean parasite, Ceratomyxa shasta, and were characterized by indirect immunofluorescent techniques, western blot analysis, and immunoelectron microscopy. The resulting Mabs reacted specifically with the trophozoite and sporoblast stages of the parasite, but not with the mature spore, indicating that certain antigens are stage-specific....
Resource Type:: Dissertation
Full Text:: Mitchell, L. G. 1977. Myxosporidia. In: Parasitic Protozoa (ed. by J. Kreier), pp 115-154. Vol. 4. Academic

In vitro regulation and cultivation of salmonid lymphocytes

Creator:: DeKoning-Loo, Jenefer
Abstract:: The foundation of the research compilation presented here began with the derivation of an improved method for obtaining optimal in vitro mitogenic responses in salmonid lymphocyte cultures by utilizing autologous or homologous plasma as the primary serum supplement. It was observed that lymphocytes which were previously unresponsive to mitogenic challenge...
Resource Type:: Dissertation
Full Text:: Abstract approved: Stephen L. Kaattari Redacted for Privacy The foundation of the research compilation

Structural and functional analysis of the 57 kDa protein produced by the fish pathogen, Renibacterium salmoninarum

Creator:: Wiens, Gregory D.
Abstract:: Little is known about the virulence factors of Renibacterium salmoninarum, the causative agent of salmonid bacterial kidney disease. The predominant protein produced by R. salmoninarum in broth culture or during infection is a 57/58 kDa protein (p57) which is associated with strain virulence. In this study monoclonal antibodies (MAbs) to...
Resource Type:: Dissertation
Full Text:: . Renibacterium salmoninarum. RAbstract approved: - edacted for Privacy Stephen L. Kaattari Little is known

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:: Abstract approved: ______________________________________________________ Rebecca L. Vega Thurber

Delineation of the composition of an indigenous soil population of Rhizobium meliloti in root nodules of uninoculated field grown Medicago sativa L.

Creator:: Jenkins, Michael B.
Abstract:: Agronomic and microbiological studies were conducted on "Anchor" alfalfa (Medicago sativa L.) established from uninoculated seed on three Aridisols in central Oregon. Significant responses to 230 Kg N per ha (NH₄NO₃), which was applied in mid-April and after each first and second harvests, were observed in yield parameters of the...
Resource Type:: Dissertation
Full Text:: Population of Rhizobium meliloti in Root Nodules of Uninoculated, Field Grown Medicago sativa L. AN

Transformation of alfalfa using Agrobacterium tumefaciens

Creator:: Gelford, Inga L.
Abstract:: Agrobacterium tumefaciens, the causative agent of crown gall disease, does not readily infect commercial varieties of alfalfa (Medicago sativa). Cloned virulence genes from the megaplasmid pTiBo542 have been shown to enhance Agrobacterium host range and infectivity on dicotyledonous plants. To obtain a gene transfer system for commercial alfalfa cultivars, an...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Inga L. Gelford for the degree of Masters of Science in Microbiology

The exploitation of methylthioadenosine phosphorylase deficiency in cancer therapy

Creator:: Lindburg, Katherine L.
Abstract:: Methylthioadenosine (MTA) is a naturally occuring nucleoside formed during the synthesis of polyamines in mammalian cells. MTA is rapidly catabolised by MTA phosphorylase (MTAase), eventually yielding methionine and adenine. MTAase has been shown to be active in all normal cells, but deficient in some cells and tissues of malignant origin....
Resource Type:: Masters Thesis
Full Text:: deficiency in cancer therapy AN ABSTRACT OF THE THESIS OF Katherine L. Lindburg for the degree of Master

Disturbances in a marine bacterioplankton system drive community assembly towards niche-based processes

Creator:: Vergin, Kevin L.
Abstract:: Over 100 monthly bacterioplankton DNA samples, from each of the surface and 200 m depths at the Bermuda Atlantic Time-series Study (BATS) site, were analyzed for community assembly processes. Correlation networks, filtered for potential autocorrelation artifacts, were constructed for each depth. Network characteristics for the two depths were remarkably similar...
Resource Type:: Masters Thesis
Full Text:: Bacterioplankton System Drive Community Assembly Towards Niche-based Processes by Kevin L. Vergin

The effects of single and multiple pathogen and parasite infections on juvenile chinook and coho salmon during early marine residency

Creator:: Sandell, Todd A.
Abstract:: Nearly 3000 juvenile Chinook (Oncorhynchus tshawytscha) and coho (O. kisutch) salmon captured in nearshore waters off the coasts of Washington and Oregon from 1999-2004 were tested for infection by Renibacterium salmoninarum, Nanophyetus salmincola, and skin metacercariae. First, three quantitative PCR primer/probe sets were compared for detection of R. salmoninarum; amplification...
Resource Type:: Dissertation
Full Text:: : ___________________________________________________________ Jerri L. Bartholomew Nearly 3000 juvenile Chinook (Oncorhynchus tshawytscha) and

How Do Parasites Infect Salmon? Comparative Transcriptomics Reveal Myxozoan Adaptations for Parasitism

Creator:: Americus, Benjamin
Abstract:: The phylum Cnidaria contains three main branches: Anthozoa (corals, sea anemones) Medusozoa (jellyfish, hydra), and Endocnidozoa. This latter branch is characterized by parasitism and contains the microscopic fish-parasites Myxozoa. Myxozoa are highly simplified, consisting of only a few cell types, however they have retained the nematocyst stinging cells and complex...
Resource Type:: Dissertation

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