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 20 of 37 for “"horizontal transmission"”.
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Arthropod and vertebrate determinants for horizontal transmission of Rickettsia felis
… including: fever, headache, and myalgia. Transmission of R. felis within flea colonies is predominantly via vertical (transovarial and transstadial) transmission and mechanisms of horizontal transmission are undescribed. Studies are needed to describe both arthropod and vertebrate …
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Evaluating behavioral avoidance and horizontal transmission of Beauveria bassiana in bed bugs (Cimex lectularius) across spatially complex environments
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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The Epizootiology of Nosema Pyrausta (Paillot) in The European Corn Borer, Ostrinia Nubilalis, in Central Illinois
… were determined by the interaction between horizontal transmission and the first generation input of N. pyrausta. An empirical threshold for horizontal transmission was calculated for the second generation corn borers. Horizontal transmission increased when the average weekly density …
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Interactions Between the Odorous House Ant (Tapinoma sessile) and RNA Viruses: a Multi-Faceted Approach
… colonies, suggesting trophallaxis as a route for horizontal transmission. These viruses were prevalent in urban populations with polygyne, unicolonial traits, indicating a potential association between colony social structure, colony location, and virus presence and diversity. Additionally, common …
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Tetracycline resistance and its dissemination in the Bacteroides group
… groups, tetQ appears to be spreading by horizontal transmission within the Bacteroides group. Identical tetQ sequences were found in a number of isolates with differing taxonomy and geographic origin, indicating that extensive natural gene transfer has occurred. Among the exchange events …
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Evolutionary and ecological consequences of chronic infection in Sulfolobus islandicus
… on antagonistic lytic viruses. Lytic viruses are horizontally transferred from one infected host to a new host via the release of viral particles through cell lysis and death. When increases in horizontal transmission increase the fitness of the virus, selection acts to favor traits that would, in …
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Separação imunomagnética de cistos teciduais e esporocistos de toxoplasma gondii pelo anticorpo monoclonal K8/15-15 e caracterização de sua proteína alvo por Western Blot e Imunoblot
… infects about one third of the human population. Horizontal transmission of T. gondii occurs more often by ingestion of tissue cysts containing bradyzoites and/or ingestion of sporulated oocysts. The current study aimed to develop a protocol of immunomagnetic separation (IMS) directed to T. gondii …
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Development and Utilization of Novel Immunologic Reagents for Infectious Disease Studies in the Guinea Pig
… These individuals serve as a reservoir for transmission of the virus to naïve individuals resulting in a global increase of 26 million new infections per year. Complications associated with first-episode infections acquired from horizontal transmission can include aseptic meningitis and …
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Metabolic Profiling of Prions In The Gastro-Intestinal Tract
… both humans and animals. They can be spread by horizontal transmission as seen in chronic wasting disease in deer and elk population. In addition, transmission to humans has also been documented which includes bovine spongiform encephalopathy in cattle to variant Creutzfeldt-Jakob disease in …
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The tick response to Rickettsial dissemination during typical and atypical Rickettsial infection
… the infection of SFG Rickettsia via vertical and horizontal transmission. However, the prevalence of rickettsial transmission is limited to certain species of ticks, and this limitation is known as a specific tick/Rickettsia relationship. Due to the continuous increase of tick-borne rickettsial …
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Etiologia da diarréia infantil na região metropolitana do Rio de Janeiro: caracterização de possíveis marcadores de virulência em Escherichia coli enteropatogênica (EPEC) e de uma adesina relacionada ao fenótipo agregativo em amostras que coexpressam adesão localizada
… suggesting that this phenotype was acquired by horizontal transmission from the EAEC strains which were found co-inhabiting the gut of these patients.
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Overwintering Mechanisms of La Crosse Virus Vectors
… virus maintains a complex natural cycle through horizontal transmission with sciurid rodents and Aedes mosquitoes in Virginia. Transovarial transmission also occurs in this host-parasite system and has evolved for the virus to persist through winter. The virus perpetuates in diapause induced …
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Exploring Youth-TEK Linkages in the New Rurality
… system of knowledge maintained through cultural transmission among and between generations. TEK adaptations can be important for enabling communities to respond to socio-ecological change. Currently, emphasis has been given to the intergenerational transmission of such knowledge, its importance …
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The Role of Bacteroides Conjugative Transposons in the Spread of Antibiotic Resistance Genes, And, The Role of recA in DNA Damage Repair in Deincoccus Radiodurans
… human colon, as a model for investigating the horizontal transmission of antibiotic resistance genes in the environment. The data presented in this thesis shows that an open genetic conduit exists between gram positive bacteria that reside in the intestinal lining of cows and gram negative …
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Transmission of La Crosse Virus in Southwest Virginia: Role of Accessory Vectors, Microfilarial Coinfection and Canine Seroprevalence
… a result, this study provided documentation of horizontal transmission of LAC virus throughout southwest Virginia, demonstrating that dogs make useful sentinels for assessing the distribution of LAC virus in an area. The final objective examined the effects of coinfection with D. immitis …
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Understanding the impact of Russian wheat aphid-associated microbes on plants
… plants only after aphid feeding, suggesting horizontal transmission of microbes during infestation. Experimental reduction of bacterial populations in aphids led to decreased chlorosis in wheat, providing direct evidence that aphid-associated bacteria enhance aphid aggressiveness. Chapter 3 …
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Molecular characterisation of the bacterial communities in cabbage aphid (Brevicoryne brassicae) and their associated fitness effects
… different type of symbiont, relying primarily on horizontal transmission. Phylogenetic analysis of 16S sequence revealed that the majority of bacterial types could be split into two groups: Group 1 Pseudomonas type bacteria and Group 2 Erwinia type bacteria. A real-time (Taqman®) qPCR assay was …
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Discovery and characterisation of viral-like sequences and viruses associated with Phytophthora pluvialis in New Zealand
… (HRM) analysis was developed and used to track horizontal transmission of PplRV1 between P. pluvialis isolates. The HRM results revealed PplRV1b was potentially transmitted between the isogenic isolates of P. pluvialis NZFS 4018, while PplRV1 was not transmitted between P. pluvialis isolates. …
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Population genetics of P transposable elements and their host species, with emphasis on Drosophila willistoni and Drosophila sturtevanti
… species groups (subgenus Sophophora). The transmission of P elements among species, their spread within species and the strength of selective constraints, as well as the level at which they are imposed on these elements, were investigated using DNA sequence data. Particular emphasis was …
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