Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"antibiotic resistance gene"”.
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Antibiotic resistance gene abundance in feces of calves fed pirlimycin-dosed whole milk
Exposure to antibiotics has the potential to increase the incidence and proliferation of antibiotic resistance genes (ARG) in the gut and fecal microbiome. Non-saleable, antibiotic-containing milk from cows treated with antibiotics (waste milk) is commonly fed to dairy calves but the effects of …
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Distribution, frequency and contribution to the expression of antibiotic resistance gene of an IS element in Acinetobacter baumannii
Includes bibliographical references (leaves 60-78).
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An investigation of the microbial population in aquarium water, using next generation sequencing
With many of antibiotics used in the clinic, antibiotic resistant genes (ARG) are widely transferred among bacterial communities. As a result, superbugs possessing several antibiotic resistant genes are a significant threat to public health. Antibiotic resistant pathogens in drinking water or …
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Nuclear Transformation of Chlamydomonas Reinhardtii to Allow for Studies on Circadian Expression of the β-Tubulin Gene
… output pathway that regulates β-tubulin gene expression in Chlamydomonas reinhardtii, a nuclear transformation of the organism was performed with a β-tubulin promoter:reporter gene construct. To increase the efficiency of the selection, a cotransformation procedure was adapted with ble, …
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Markerfreie transplastome Tabakpflanzen
The genetic engineering of higher plant chloroplasts typically involves the stable integration of antibiotic resistance genes as dominant selectable markers. The potential spread of these genes through pollen release or to soil microbes via horizontal gene transfer is of considerable environmental …
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Metagenomic Analysis of Antibiotic Resistance Genes in the Fecal Microbiome Following Therapeutic and Prophylactic Antibiotic Administration in Dairy Cows
The use of antibiotics in dairy cattle has the potential to stimulate the development and subsequent fecal dissemination of antibiotic resistance genes (ARGs) in bacteria. The objectives were to use metagenomic techniques to evaluate the effect of antibiotic treatment on ARG prevalence in the fecal …
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Identification and characterization of cell-adapted mutations in West Nile Virus and replicons
… modified to contain neomycin phosphotransferase (antibiotic-resistance) gene and cells that persistently harbored this WNR were selected for using G418. There were many changes to the genomes harvested from WNR-bearing cell cultures compared to the parental genome, perhaps the most striking was …
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Effects of dietary components on antibiotic resistance using mechanistic and plasmid based studies
Antibiotic resistance may have the potential to spread from animals to humans through the food chain. It has been observed that prebiotics such as mannan rich fraction (MRF) improve broiler growth and performance in a similar manner to antibiotic growth promotors. They have also been linked to a …
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Effects of Microbial Community Stress Response and Emerging Contaminants on Wastewater Treatment Plants
… and other emerging pollutants, such as antibiotic resistance genes and disinfection by-products. In order to assess microbial community dynamics of the response of nitrifying microorganisms to removal of ammonia in the feed, nitrifying activated sludge reactors were operated at various …
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Impact of Manure Land Management Practices on Manure Borne Antibiotic Resistant Elements (AREs) in Agroecosystems
Rising global antibiotic resistance has caused concerns over sources and pathways for the spread of contributing factors. Majority of the antimicrobials used in the U.S. are involved in veterinary medicine, primarily with livestock rearing. Animal manure land application integrates livestock …
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Abundance of Antibiotic Resistance Genes in Feces Following Prophylactic and Therapeutic Intramammary Antibiotic Infusion in Dairy Cattle
Prophylactic and therapeutic antibiotic treatments have the potential to increase excretion of antibiotic resistance genes (ARGs) by dairy cattle through selection pressure on the gut microbiome. The objective of these studies was to evaluate the effect of cephapirin benzathine administered …
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Excretion of Antibiotic Resistance Genes by Dairy Calves
… used to evaluate the effect of milk replacer antibiotics on abundance of selected antibiotic resistance genes (ARG) in the feces. Calves were blocked by breed, gender, and birth order, and assigned to one of three treatments at birth. Treatments were control (containing no antibiotics in the …
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The Effects of dairy cattle antibiotics on soil microbial community cycling and antibiotic resistance
Antibiotic use in agricultural ecosystems has the potential to increase resistance to antibiotics in soil microbial communities since 40-95% of an antibiotic dose administered to livestock is excreted intact or as metabolites. Exposure to antibiotics is also known to alter microbial community …
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Molecular microbial ecology of hospital ward environments.
… and select bacterial populations of interest. Antibiotic-resistance gene specific PCRs were used to investigate the presence of resistance determinants. PCR-DGGE was used to resolve fragments of the 16S rRNA gene from total DNA extractions and the resulting sequence data was used to identify …
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Acquisition of an Antibiotic Tolerant Phenotype in Enterobacter cloacae and Klebsiella pneumoniae through Antibiotic-Induced Metabolic Regulation
… and have been associated with the spread of antibiotic resistance. These organisms can enter a physiological state that allows a fraction of each population to survive antibiotic exposure at concentrations above what is necessary to treat most of the population. Because most of the population …
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Effect of Standard Post-harvest Interventions on the Survival and Regrowth of Antibiotic-Resistant Bacteria on Fresh Produce
… for fresh vegetables to serve as a vehicle for antibiotic -resistant bacteria is poorly understood. Antibiotics and antibiotic-resistant bacteria have been shown to persist in manure of animals administered antibiotics, and in compost generated from this manure, where there is the potential for …