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Articles 1 - 6 of 6
Full-Text Articles in Life Sciences
The Threat Of Antibiotic Resistance In Changing Climate, Aliyar Cyrus Fouladkhah, Brian Thompson, Janey Smith Camp
The Threat Of Antibiotic Resistance In Changing Climate, Aliyar Cyrus Fouladkhah, Brian Thompson, Janey Smith Camp
Agricultural and Environmental Sciences Faculty Research
As the earliest form of life, microorganisms have elaborate mechanisms for adapting to changes in environmental conditions.
Molecular Mechanisms Of Antimicrobial Resistance In Multi-Drug Resistant Enterococci, Ayesha Khan
Molecular Mechanisms Of Antimicrobial Resistance In Multi-Drug Resistant Enterococci, Ayesha Khan
Dissertations & Theses (Open Access)
Antibiotic resistance is a major global public health threat. Enterococci are recalcitrant, nosocomial pathogens that can be intrinsically resistant to valuable antibiotics, like beta-lactams, or evolve resistance to all existing antimicrobials. The LiaFSR system regulates resistance to cell membrane (CM) stressors like daptomycin (DAP), a front-line drug for multi-drug resistant infections. DAP resistance (DAP-R) in E. faecalis is mediated by CM phospholipid alterations. Emergence of DAP-R often leads to b-lactam resensitization, a phenomenon called the seesaw effect. The molecular mechanism of DAP-R and the seesaw effect are unknown. Here we show that LiaX is a surface exposed protein whose C-terminal …
Synergistic Inhibition Of Resistant Enterobacteriaceae Using A Possible Klebsiella Secreted Bacteriocin With Broad-Spectrum Antibiotic, Andrew Robbins
Synergistic Inhibition Of Resistant Enterobacteriaceae Using A Possible Klebsiella Secreted Bacteriocin With Broad-Spectrum Antibiotic, Andrew Robbins
Undergraduate Honors Theses
Due to the increasing prevalence of multi-drug resistant (MDR) bacteria, it is now important to begin the search for novel means of defending against such resistant infections. Enterobacteriaceae is a clinically relevant family of bacteria that has shown extensive resistance to many antibiotics, especially after biofilm formation. Inhibitory poly-microbial interactions within this family have been observed. It is known that Citrobacter freundii (CF) growth is significantly inhibited by Klebsiella pneumoniae (KP) through a secreted protein. In this study, the potential KP bacteriocin was screened for its inhibitory effects on CF at various phases of biofilm development. The suspected KP bacteriocin …
Antimicrobial Activity Of Extracts From The Leaves Of Marrubium Vulgare, Ashley Cravens
Antimicrobial Activity Of Extracts From The Leaves Of Marrubium Vulgare, Ashley Cravens
Undergraduate Theses
Natural products have served as powerful therapeutics against pathogenic bacteria since the golden age of antibiotics of the mid-20th century. In the United States, antibiotics are a key component of modern medicine and are one of the top written prescriptions every year. However, overuse and misuse of antibiotics has led to an increasing frequency of antibiotic-resistant infections. These infections are difficult and expensive to treat, often resulting in increased length of illness, hospital stays, and mortality rates. This demonstrates a clear need for novel antibiotics in for modern medicine. Murrubium vulgare (white horehound) is a shrub found in the Appalachia …
High-Throughput Two-Stage Dereplication Of Cave Bacteria To Discover Novel Antibiotic Compounds, Alexander Archey
High-Throughput Two-Stage Dereplication Of Cave Bacteria To Discover Novel Antibiotic Compounds, Alexander Archey
Williams Honors College, Honors Research Projects
Since their discovery over a century ago, antibiotics have been a staple of combating infectious diseases. However, bacteria develop resistance to antibiotics through a variety of mechanisms. Efforts to identify new antibiotics often fail by discovering already-known antibiotics, or failing to synthesize new antibiotics that are safe for clinical use. The aim of this research was to dereplicate bacteria- to screen for antibiotic production in- normally isolated in cave ecosystems. Using two new technologies, the Antibiotic Resistance Platform (ARP) and a data acquisition and bioinformatics technique (IDBac), my dereplicating method allowed high throughput of bacterial screening for antibiotics. In this …
Genomic And Culturomic Analysis Of Gut Microbiota Function And Salmonella Enterica Expansion, Gavin Fenske
Genomic And Culturomic Analysis Of Gut Microbiota Function And Salmonella Enterica Expansion, Gavin Fenske
Electronic Theses and Dissertations
Enteric bacteria that are resident in the hindgut of mammals are critical in immune development, digestion, and colonization resistance against pathogens. One of the major pathogens that gut commensals provide resistance against is Salmonella enterica, a major foodborne pathogen capable of infecting almost every warm-blooded animal. Given the interplay between pathogens and commensals in the gut lumen, the gut microbiota of pigs was studied by combining two disparate techniques: shotgun metagenomics and high throughput culturomics. Metagenomics readily identifies major taxa present in samples and can give an estimation to total genetic catalogue from an environment. However, many rare or …