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Filtering by: Creator Greer, Burke T. Remove constraint Creator: Greer, Burke T. Degree Field Microbiology Remove constraint Degree Field: Microbiology

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  • The role of costimulation and adjuvants in the development of T cell effector and memory responses

    Creator:
    Maxwell, Joseph R.
    Abstract:
    T cells are one of the key cells in the immune system. Although they are not the first line of defense against a pathogen, their functions can greatly enhance the phagocytosis and destruction of pathogens as well as the development of antibody responses. Furthermore, even when responding T cells have...
    Resource Type:
    Dissertation
    Full Text:
    Costimulation and Adjuvants in the Development of T Cell Effector and Memory Responses. Abstract approved

  • Exploring phylogeny of Rhodococcus fascians isolates using 16S ribosomal DNA sequence analysis

    Creator:
    Sandberg, Eva Song
    Abstract:
    Rhodococcus fascians is a Gram-positive, pleiomorphic actinomycete that causes leafy gall formation in a wide range of plant hosts. This particular phytopathogen has been a focus of research at the Oregon State University Plant Clinic, a diagnostic laboratory. Phylogeny of R. fascians isolates obtained from Plant Clinic submissions was determined...
    Resource Type:
    Honors College Thesis
    Full Text:
    the contributions, knowledge, and support of the following people: Melodie Putnam Dr. Mary Burke

  • Induction of apple defense genes by Erwinia amylovora and biological control agents

    Creator:
    Bauer, Lisa M.
    Abstract:
    Fire blight is a serious disease of apple and pear trees caused by the bacterium, Erwinia amylovora. This bacterium harbors a pathogenesis mechanism known as the Hrp secretory operon which induces some resistance genes and suppresses other resistance genes in the host plant following invasion. While previous researchers analyzed expression...
    Resource Type:
    Honors College Thesis
    Full Text:
    offered as a mentor. I’d also like to recognize my two committee members, Mary Burke and Ken Johnson

  • Silencing of Agrobacterium tumefaciens T-DNA oncogenes by cosuppression

    Creator:
    Lee, Hyewon
    Abstract:
    We have developed crown-gall resistant transgenic plants capable of suppressing Agrobacterium tumefaciens T-DNA oncogenes. Crown gall tumors result from overproduction of auxin and cytokinin in plant cells transformed by A. tumefaciens. High phytohormone levels result from expression of two auxin biosynthetic genes, tryptophan monooxygenase (iaaM) and indole acetamide hydrolase (iaaH),...
    Resource Type:
    Masters Thesis
    Full Text:
    Silencing of Agrobacterium tumefaciens T-DNA oncogenes by

  • Comparing Sediment Microbial Communities of Arctic Beaver Ponds to Tundra Lakes and Streams

    Creator:
    Shannon, Kelly
    Abstract:
    In recent decades the habitat of North American beaver (Castor canadensis) has expanded from boreal forests into pan-Arctic tundra ecosystems. It is unknown how the advance of beavers into Arctic watersheds will impact microbial communities responsible for the mineralization of organic matter (OM), which has implications for carbon cycling. To...
    Resource Type:
    Masters Thesis
    Full Text:
    duplicate so that T. thermophilus represented 0.5% (first replicate) and 1.0% (second replicate) of total

  • Expanding Diagnostic Assays for Pseudoloma neurophilia & Description of the Progression of Infection in Adult Zebrafish Populations

    Creator:
    Schuster, Corbin J.
    Abstract:
    Pseudoloma neurophilia is the most common pathogen reported in zebrafish (Danio rerio) research facilities and is an important threat to the zebrafish model. This microsporidian parasite can cause clinical disease, but more importantly is a causative agent of non-protocol induced variation in research. Studies utilizing infected zebrafish, could potentially confound...
    Resource Type:
    Dissertation
    Full Text:
    ., Hayward, S., Miller, T. L., & Jerry, D. R. (2017). Use of environmental DNA (eDNA) and water quality data

  • 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:
    a portion if DNA (T-DNA) into the plant cell. Preventing infection by using the biocontrol strain

  • Fecal Bacteroidetes host distributions and environmental source tracking

    Creator:
    Dick, Linda K.
    Abstract:
    Contamination of recreational and shellfish waters with fecal pollution is a major water quality issue with associated economic impacts and human health risks. Reliable fecal source identification and rapid, quantitative analyses are essential components of risk assessment. Enteric bacteria that are endemic to specific hosts have a potential role as...
    Resource Type:
    Dissertation
    Full Text:
    the host species using Terminal Restriction Fragment Length Polymorphisms (T-RFLP). Clones

  • Anaerobic biodegradation of the cyclic nitramines, RDX and HMX, by ovine ruminal microbes

    Creator:
    Eaton, Hillary L.
    Abstract:
    Cyclic nitramines released into all environmental compartments through anthropogenic activities are toxic and possibly carcinogenic and mutagenic. Soils on military ranges, located throughout the world in various climatic regions and close to human activities, are especially susceptible to cyclic nitramine contamination. The properties of soils on military ranges will directly...
    Resource Type:
    Dissertation
    Full Text:
    help to stay on track and time in listening to me. I also owe my sincere gratitude to Dr. Mary Burke

  • A molecular study of viral proteins in the pathogenesis of infectious hematopoietic necrosis virus

    Creator:
    Chiou, Pinwen Peter
    Abstract:
    The role of viral proteins in the pathogenesis of infectious hematopoietic necrosis virus (IHNV) was studied at the molecular level. The expression of the viral genes at the protein and RNA level, and their cellular localization, were characterized to further our understanding of viral pathogenesis. The pathogenic effect of individual...
    Resource Type:
    Dissertation
    Full Text:
    older than one year (Yasutake, 1978; Burke and Grischowsky, 1984; Traxler, 1986; Banner et al., 1991