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Full-Text Articles in Life Sciences
Passive Immunization Against Invasive Salmonella Enterica, Angelene Richards
Passive Immunization Against Invasive Salmonella Enterica, Angelene Richards
Legacy Theses & Dissertations (2009 - 2024)
The Gram-negative bacterium, Salmonella enterica is a prominent etiologic agent of both diarrheal disease and enteric fever that encompasses over 2500 serovars, including S. Typhimurium (STm) and S. Typhi (STy). S. enterica is transmitted through contaminated food and water and, following ingestion, invades the gastrointestinal (GI) mucosa. The bacterium uses flagellar-based motility to target microfold (M) cells overlying gut-associated lymphoid tissues known as Peyer’s patches in the small intestine. Entry into Peyer’s patch tissues is a pivotal step in the infection process, as the bacterium can then disseminate systemically in the host. Given the rise in antibiotic resistance amongst S. …
Adaptation Of Vibrio Cholerae O1 To Protective, Lipopolysaccharide-Specific Antibodies In The Intestinal Lumen, Danielle Elizabeth Baranova
Adaptation Of Vibrio Cholerae O1 To Protective, Lipopolysaccharide-Specific Antibodies In The Intestinal Lumen, Danielle Elizabeth Baranova
Legacy Theses & Dissertations (2009 - 2024)
The outer membrane (OM) of Gram-negative enteric pathogens like Vibrio cholerae is a barrier against host defense factors, as well as a sensor of physical and chemical stimuli that the bacteria encounter in the gastrointestinal tract. The OM is also the primary target of the mucosal immune response, which consists of secretory antibodies primarily directed against lipopolysaccharide (LPS). ZAC-3 is a monoclonal antibody (MAb) that targets the conserved core/lipid A region of LPS of the pandemic V. cholerae O1 serotype. In a neonatal mouse model, passively administered ZAC-3 IgG has been shown to reduce the ability of V. cholerae to …
Antibody-Mediated Immunity To Vibrio Cholerae At Epithelial Surfaces, Kara Jeanette Levinson
Antibody-Mediated Immunity To Vibrio Cholerae At Epithelial Surfaces, Kara Jeanette Levinson
Legacy Theses & Dissertations (2009 - 2024)
Vibrio cholerae, the causative agent of the severe diarrheal disease cholera, has an estimated worldwide disease burden in the millions and remains a significant public health threat. Immunity to V. cholerae is primarily antibody-mediated and though V. cholerae colonization evokes a mucosal immune response, it is the secretory IgA (SIgA) antibodies produced against bacterial surface antigens, specifically lipopolysaccharide (LPS) that confer protective immunity. SIgA antibodies are thought to function by inhibiting colonization by cross-linking and agglutination of pathogens, thereby limiting access to the epithelium, a process known as immune exclusion. Recent studies in other enteric pathogens have demonstrated that SIgA …
Humoral Immunity To Ehrlichial Infection : Identification And Characterization Of An Igm+ Memory B Cell Population, Jennifer Lynne Yates
Humoral Immunity To Ehrlichial Infection : Identification And Characterization Of An Igm+ Memory B Cell Population, Jennifer Lynne Yates
Legacy Theses & Dissertations (2009 - 2024)
Immunological memory is a fundamental concept that is key to generating and maintaining immunity to pathogens. Humoral memory resides in part in antigen-specific memory B cells, which are classically defined as class-switched, somatically mutated, long-lived cells that are highly responsive to specific antigen challenge. Despite the focus on class-switched memory B cells, several studies have validated the existence of IgM memory B cells, and have demonstrated distinct functions of IgM and IgG memory B cell subsets. Based on the expression of CD11c, we have identified a large population of IgM memory B cells using a natural model of infection by …