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Bacterial Infections and Mycoses Commons™
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Articles 1 - 5 of 5
Full-Text Articles in Bacterial Infections and Mycoses
The Role Of Coagulase-Negative Staphylococcal Secreted Products On Staphylococcus Aureus And Staphylococcus Lugdunensis Infections, Denny Chin
Electronic Thesis and Dissertation Repository
The Staphylococcus genus is comprised of over 40 bacterial species. The most well-studied species in this genus is the notorious human pathogen Staphylococcus aureus, a bacterium that produces coagulase among many other virulence factors. Since S. aureus is a major health burden and causes a plethora of diseases in humans, it has received significant attention and much research has been done to understand its biology to treat diseases caused by this pathogen. However, the coagulase-negative staphylococci (CoNS) make up most of the staphylococcal species and have received less attention since they are thought to have a lesser impact on …
Synergistic Effects Of Non Contact Induction Heating & Antibiotics On Staphylococcus Aureus Biofilm, Rajeshwar Singh Sidhu
Synergistic Effects Of Non Contact Induction Heating & Antibiotics On Staphylococcus Aureus Biofilm, Rajeshwar Singh Sidhu
Electronic Thesis and Dissertation Repository
Staphylococcus aureus is a major cause of prosthetic joint infection (PJI) in which it forms adherent biofilms, thick aggregates of extracellular polymeric substances (EPS) produced by the bacteria. Biofilm associated infections are difficult to treat as they have increased resistance to various antimicrobial agents, which means infected implants often require multiple procedures and prolonged antibiotic therapy. However, a new and emerging method of treatment of PJI is non-contact induction heating (NCIH) of metal implants. We sought to investigate the feasibility and effectiveness of NCIH along with synergistic effects of antibiotics (Vancomycin) in reducing bacterial load within surface associated biofilms in …
Elucidating The Importance Of Hope And Its Potential Lewis Glycosylation In Helicobacter Pylori, Keertika Yogendirarajah
Elucidating The Importance Of Hope And Its Potential Lewis Glycosylation In Helicobacter Pylori, Keertika Yogendirarajah
Electronic Thesis and Dissertation Repository
Helicobacter pylori colonizes 50% of the world’s population, whereby glycoproteins and Lewis Y-containing lipopolysaccharides contribute to its pathogenesis. We investigated whether the HopE porin is glycosylated, if the glycan is Lewis Y, and if this is mediated by the putative oligosaccharide transferase HP0946 or the O-antigen ligase WaaL. Western blotting was performed on outer membranes with anti-HopE antibodies, anti-Lewis Y antibodies and fucose-binding BambL lectin to ascertain HopE glycosylation. We discovered that HopE is likely glycosylated by a non-Lewis Y fucose-containing glycan and neither HP0946 nor WaaL are the transferase. Additionally, we investigated HopE’s role in antibiotic susceptibility via Etest …
Carbohydrates And Fungal Toxin Exposure Influence The Vaginal Microbiota, Metabolome, And Reproductive Health Of Women, Stephanie L. Collins
Carbohydrates And Fungal Toxin Exposure Influence The Vaginal Microbiota, Metabolome, And Reproductive Health Of Women, Stephanie L. Collins
Electronic Thesis and Dissertation Repository
The reproductive health of women is influenced by microorganisms and their metabolites, namely those representing the vaginal microbiota and those producing toxins that are ingested. To manipulate the vaginal microbiota toward a health-associated, Lactobacillusdominant state, an approach adopting prebiotic lactulose was taken. Using batch culture, lactulose supported Lactobacillus maintenance and positively altered metabolites, while not disrupting indigenous L. crispatus epithelial adherence. The vagina also harbours abundant glycogen, but initial assumptions that lactobacilli utilize it were incorrect. I have now shown that glycogen selectively stimulates organisms associated with dysbiosis and L. iners in a self-limiting manner. Other compounds such as environmental …
Systematic Assessment Of The Contribution Of Superantigens To Nasopharyngeal Colonization In A Mouse Model Of Streptococcal Infection, Katherine J. Kasper
Systematic Assessment Of The Contribution Of Superantigens To Nasopharyngeal Colonization In A Mouse Model Of Streptococcal Infection, Katherine J. Kasper
Electronic Thesis and Dissertation Repository
Streptococcus pyogenes is adapted for persistence in humans. It typically colonizes the tonsils and skin, and humans are the only known reservoir. S. pyogenes can cause a wide range of mild to serious infections. Most streptococci-related deaths are due to complications of rheumatic fever and invasive infections. S. pyogenes produces virulence factors that contribute to the pathogen’s ability to colonize and cause disease, including streptococcal superantigens (SAgs), also known as streptococcal pyrogenic exotoxins (Spes). SAgs function by cross-linking T cells and antigen presenting cells (APC) which may cause a massive inflammatory response, and as such have been found to contribute …