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 “"tick-borne disease"”.
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Abiotic and biotic determinants of tick-borne disease risk in Central Panama
As the incidence of tick-borne disease rises globally, the need for comprehensive research into the underlying mechanisms of tick and pathogen distributions becomes increasingly urgent. Hard ticks are ectoparasites that typically feed on a vertebrate host once during each of three life stages and …
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Modeling the Impact Of Environmental Factors, Diapause and Control Strategies on Tick and Tick-Borne Disease Dynamics
… vector responsible for a wide variety of diseases: ticks. Due to climate change, various tick species are rapidly spreading northward from the United States and have increasingly affected the Canadian population through a variety of tick-borne diseases including Lyme disease. In order to …
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UNDERSTANDING THE INFLUENCE OF ANTHROPOGENIC HABITAT MODIFICATION ON URBAN ANIMALS: CASE STUDIES OF CARRIBEAN LIZARDS AND NORTH AMERICAN MAMMALS
… behavior along an urban-rural gradient, 3) tick-borne disease host and vector communities. In my first chapter, I examined the influence of urbanization and road networks on dispersal of three lizard species in the context of their development tolerance. I found that development tolerance is …
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Population Genetic Structure of Ixodes pacificus Ticks and Detection of Their Pathogens In-Silico
Ticks are hematophagous ectoparasites responsible for the transmission of several serious illnesses in humans, domestic animals, livestock, and wildlife. As climate changes and ticks are introduced into new areas by their host, regions unfamiliar with tick-borne disease become vulnerable to …
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Discovery and Molecular Characterization of Selenoprotein M in the Salivary Glands of <i>Amblyomma maculatum</i>, the Gulf Coast Tick
<p>The Gulfcoast ticks transmit disease-causing pathogens to humans and animals. <em>Rickettsia parkeri</em> is notable among the pathogens transmitted by <em>A. maculatum</em> to humans. Heavy infestations of <em>A. maculatum</em> on animal ears cause them to become thickened and curled, a …
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Ehrlichia chaffeensis mediates Hedgehog and Hippo signaling to activate an anti-apoptotic cellular program
… bacterium responsible for the emerging zoonotic disease, human monocytic ehrlichiosis (HME). HME is the most prevalent and life-threatening tick-borne disease in the United States. In the past two decades, the incidence of HME has increased 10-fold; however, the number of reported cases is …
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Exploration of the spatial epidemiology of tick borne pathogens of livestock in Southern Cumbria
… anddomesticated hosts are of particular concern. Tick-borne pathogens are not only a case in point; butalso their threat is now augmented by increasing tick abundance, changing climate, and theextraordinary nationwide increase in the abundance of deer (that serve as a key host species). The major …
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Tick abundance and microorganism diversity in the 11 counties comprising the Choctaw Nation of Oklahoma
Tick-borne disease is an expanding public health concern within the United States. This is particularly true across the southcentral region where ecological diversity and human/vector interactions are highly variable. Southeastern Oklahoma encompasses the 11 counties that are within the Choctaw …
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Modeling the Impact of Projected Land Cover on Lyme Disease Emergence
Lyme disease is a common tick borne disease in the US. Lyme disease emerged from the Northeast and in the past decade, Virginia has been witnessing a rapidly increasing trend in incidence. This thesis uses land cover projection data as a basis to look at the potential future trend of Lyme disease …
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Determining the Prevalence and Distribution of Tick-Borne Pathogens in Southeastern Virginia and Exploring the Transmission Dynamics of Rickettsia Parkeri in Amblyomma Maculatum
<p>Tick-borne pathogens are an increasing threat to human and animal health worldwide. In the United States, cases of Lyme disease, spotted fever rickettsioses, ehrlichiosis and anaplasmosis are on the rise. Factors related to emergence include appearance of a new pathogen, recognition of an …
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A community modeling approach to understanding the ecology of Lyme disease
The black-legged tick (Ixodes scapularis) is responsible for transmitting the Lyme disease pathogen (Borrelia burgdorferi) to humans in eastern North America. Since the 1970s, the geographic distributions of both the pathogen and the black-legged tick have expanded throughout the US. This expansion …
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Investigation of how vegetation, small mammal interactions, and land-use determine blacklegged tick abundance
… land-use patterns have caused the expansion of tick ranges across much of the northeastern United States, which has serious implications for public health. Ticks serve as vectors for numerous tick-borne diseases, which can become more prevalent as tick ranges expand and their populations …
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Seroprevalence of Anaplasma phagocytophilum in the equine population of Southwest Virginia
… by the organism Anaplasma phagocytophilum, is a tick-borne disease of clinical importance in Southwest Virginia. The disease is recognized worldwide and causes pyrexia, anorexia, limb edema, and lethargy. Diagnosis in endemic areas is often based on clinical signs, but confirmation of infection …
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Cyclic-di-GMP Signaling in the Borrelia Spirochetes
<p>Lyme disease is the most common tick-borne disease in North America, with approximately 35,000 cases reported to the Centers for Disease Control in 2008. The genome of its causative agent, Borrelia burgdorferi, encodes for a set of genes involved in the metabolism and regulatory activities of …
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THE EFFECT OF BIOTIC AND ABIOTIC FACTORS WITHIN THE SOIL ENVIRONMENT ON THE MORTALITY OF IXODES SCAPULARIS DURING THEIR OFF-HOST PERIODS
The blacklegged tick (Ixodes scapularis) is the primary vector for multiple widespread tick-borne diseases in the United States, including anaplasmosis, babesiosis, Powassan virus, and Lyme disease. This species spends most of its two-year life cycle either questing for hosts on leaf litter and …
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Surveillance for hard ticks of public health concern in Illinois: methods, application, and education
Between 2004 and 2016, the number of human tick-borne disease (TBD) cases doubled and seven new tick-borne pathogens that can infect humans were discovered within the United States. Because tick exposure and the risk of infection with TBDs are closely related and there is a lack of approved and …
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Osteoimmunological Characterization of Borrelia burgdorferi-Induced Bone Loss: From Phenotype to Molecular Mechanisms
Lyme disease (LD) is one of the most prevalent tick-borne infections in the North American region. The causative organism of LD, Borrelia burgdorferi (B. burgdorferi), is transmitted to the host (animals or humans) via the bite of Ixodes tick. B. burgdorferi is highly motile and disseminates to …