Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Microbiology
Detection Of Beta-Lactamase Variants In Municipal Wastewater And Fresh Water, Sunil Pandey
Detection Of Beta-Lactamase Variants In Municipal Wastewater And Fresh Water, Sunil Pandey
Masters Theses
The occurrence and spread of antibiotic-resistant genes (ARGs) are pressing public health problems worldwide. A key factor contributing to the spread of ARGs is lateral gene transfer. Wastewater treatment plants (WWTPs) are measured hot spots of microbial diversity and resistance because they receive polluted wastewater from diverse sources and contain a variety of different environments with dense bacterial loads. Due to the overuse of antibiotics the genetic capacities of microbes have profited. This helps every source of resistance gene and every means of horizontal gene transmission to develop the multiple mechanism of resistance to each antibiotic used clinically, agriculturally, or …
Detection Of Antibiotic Resistance Loci In Wastewater And Fresh Water Samples, Mohammed Hamed Almalki
Detection Of Antibiotic Resistance Loci In Wastewater And Fresh Water Samples, Mohammed Hamed Almalki
Masters Theses
Proper treatment of municipal wastewater is important not only for prevention of eutrophication but also for public health concerns. One consideration for wastewater treatment is the presence of organisms carrying antibiotic resistance genes. If these organisms survive the wastewater treatment process and are released into the streams, they can pose significant risks to public health. In addition, their presence also raises concerns for lateral gene transfer events at the wastewater plant. The spread of antibiotic loci has a major impact in public health and clinical therapy because resistant organisms render conventional treatments of important illnesses difficult. Beta-lactam drugs are known …
Partial Characterization Of Lpss From Rhizobium Fredii Usda 205 Before And After Nod Gene Induction, Bradley Lawrence Reuhs
Partial Characterization Of Lpss From Rhizobium Fredii Usda 205 Before And After Nod Gene Induction, Bradley Lawrence Reuhs
Masters Theses
The lipopolysaccharides (LPS) from Rhizobium fredii USDA 205 and its nod- mutant, HC 205, which has been cured of the 192-MDa symbiotic plasmid, were isolated by the phenol-water extraction method. The LPS from the wild-type strain which was grown in association with host-plant root extract or a flavone analog to a constituent of the root extract, which is required for the induction of at least a portion of the nodulation genes, was also isolated. The conditions required for the induction of the nod genes were determined by work with a nod- mutant of R. fredii USDA 201 which …
A Comparison Of The Acidic Extracellular Polysaccharides From Rhizobium Trifolii Mutants Affected In Trifolium Repens Root Hair Curling, Brian Andrew Hanley
A Comparison Of The Acidic Extracellular Polysaccharides From Rhizobium Trifolii Mutants Affected In Trifolium Repens Root Hair Curling, Brian Andrew Hanley
Masters Theses
The compositions and sugar linkages of the acidic extracellular polysaccharide (EPS) from several Rhizobium trifolii mutants were compared. These mutants were derived from a wild type Rhizobium trifolii, ANU843, and are unable to cause normal root hair curling, Hac-, or nodulate clover, Nod-. Three of the mutants contain a Tn5 insertion in a 5.3 kb BglII fragment of the symbiotic plasmid (pSym). A fourth mutant is missing the pSym, which includes much of the 5.3 kb BglII fragment, both of these deletions result in Hac-Nod- phenotypes. When the 5.3 kb BglII fragment is cloned (pRT150) and reinserted into the …
Studies Of The Lysogenic Response As A Function Of Multiplicity Of Infection Of Lambdoid Bacteriophages, Mark Floyd Fedyk
Studies Of The Lysogenic Response As A Function Of Multiplicity Of Infection Of Lambdoid Bacteriophages, Mark Floyd Fedyk
Masters Theses
The lambdoid bacteriophages λimmλ, λimm434 and λcI are ideal subjects for the study of gene product interactions at the molecular level due to their closely related genetic makeup. Previous work in this laboratory has indicated the possibility that phage λimm is sensitive to phage λimm434cI gene product and that phage λimm434 is sensitive to phage λimmλcI gene product. The purpose of this research was to determine if the frequency of lysogeny for phage λimmλ is affected by the multiplicity of coinfection with the λimm434 phage. By comparing the graph of …