Global ETD Search

1	Molecular characterization of Edwardsiella spp. and Flavobacterium columnare Zhang, Yinfeng, January 2007 (has links) (PDF) Thesis (Ph.D.)--Auburn University, 2007. / Abstract. Vita. Includes bibliographic references (ℓ. 104-128)
2	Genetic and virulence diversity of Flavobacterium columnare Soto, Esteban 11 August 2007 (has links) Flavobacterium columnare is a freshwater fish bacterium responsible for columnaris disease, the second leading cause of mortality in pond raised catfish in the southeastern United States. Pulsedield gel electrophoresis (PFGE) is a particularly powerful tool in epidemiology and is now regarded as the gold standard for molecular typing of microorganisms. We developed methods for conducting PFGE on F. columnare, and determined its efficacy for characterizing F. columnare strains isolated from different locations in the Southeastern United States. Virulence diversity was observed in two different immersion challenge experiments conducted with 16 different isolates in channel catfish fingerlings. A direct correlation was found between the PFGE clustered groups and virulence. In summary, our results suggest that two genetic divisions of F. columnare channel catfish isolates exist, one that contains strains that are “primary” pathogens of channel catfish (Group A), and another that are “secondary” or opportunistic pathogens of catfish (Group B). Flavobacterium columnare Columnaris disease PFGE Virulence Flavobacterium columnare Virulence Columnaris disease Flavobacterium columnare PFGE Columnaris disease Virulence Columnaris disease Flavobacterium columnare Virulence PFGE
3	Hematological Parameters of the Bluegill, Lepomis machrochirus (Rafinesque), Including Effects of Turbidity, Chloramines, and Flexibacter columnaris Jones, Betty Juanelle 05 1900 (has links) Normal ranges of values for hematological parameters of bluegill gathered seasonally from three lakes were determined. Sexual, seasonal, and inter-lake variations were found. Effects of 2-wk exposure to turbidity on blood parameters included an increase in rbc size and a decrease in small lymphocytes. Effects of 3-hr exposure were increases in rbc count, hemoglobin, and pH and decreases in PG2 and large lymphocytes. The effects of 0.44 and 0.88 ppm chloramines were an increase in blood pH, a decrease in MEV, and severe spastic reactions resulting in loss of equilibrium or death in 90% of the fish. Effects of Flexibacter columnaris included an increase in transformed lymphocytes and a decrease in small lymphocytes. bluegill Bluegill. Columnaris disease. Fishes -- Effect of water pollution on. turbidity chloramines Flexibacter columnaris
4	Genetic and virulence diversity of Flavobacterium columnare Soto, Esteban, January 2007 (has links) Thesis (M.S.)--Mississippi State University. Department of Basic Sciences. / Title from title screen. Includes bibliographical references.

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