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Resistance development to parasiticides has been a problem in both terrestrial and aquatic environments. A major challenge exists in early detection of resistance emergence due to the low frequency at which resistant organisms can occur initially within a population and the difficulty in detecting t...
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Approximately 60% of human pathogens and emerging infectious diseases are zoonotic. Simulation models are increasingly being used to investigate the spread of diseases, evaluate intervention strategies and guide the decisions of policy makers. In this thesis a systematic review of modeling methods a...
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The Atlantic Canadian aquaculture industry is dominated by Atlantic salmon production. In recent years, infectious disease, parasitic infestations, and price fluctuations from international competition have caused disruptions to the industry. Diversification of the industry away from Atlantic salmon...
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There are currently four invasive tunicate species which are causing significant challenges to the aquaculture industry in Atlantic Canada: Ciona intestinalis, Styela clava, Botryllus schlosseri and Botrylloides violaceus. These tunicates foul mussel socks, aquaculture gear, boat hulls and wharves. ...
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The objectives of this thesis were: 1) to determine which factors and biological samples were associated with the estimated amount of total arsenic (As) consumed from water and food; 2) to determine which factors were associated with the concentration of total and speciated As ([As]) in urine; 3) to...
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Syndromic surveillance is a tool for continuous, automated extraction of surveillance information from health data sources. The research documented in this dissertation aimed at exploring informatics and data mining tools in order to develop and implement techniques to harvest additional surveillanc...
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The Newfoundland and Labrador (NL) aquaculture industry is a major contributor of salmon products that help meet protein needs for the world’s growing population. The industry in NL continues to grow and evolve and now includes emerging species in its production such as Atlantic cod. In a growing ...
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There is limited scientific information on relationships among smallholder dairy group membership duration, sustainable livelihoods, food and nutrition security in developing countries, and whether nutrition education of women dairy farmers enhances the nutritional benefits of being a dairy group me...
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To secure the safety of international trade of animal and their derived products, it is required that animals should be proven infection-free using a validated diagnostic test certified by the World Organization for Animal Health (OIE). Test validation involves a multi-step evaluation process to as...
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The purpose of this research was to evaluate herd and cow-level Mycobacterium avium subspecies paratuberculosis (MAP) diagnostic tests within non-infected and low to moderate within-herd prevalence MAP-infected herds. Specific objectives were to estimate herd-level sensitivity and specificity of env...
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Measurement of systemic immunoglobulin (Ig) concentrations in horses and camelids is important for early and accurate diagnosis of immunodeficiencies in order to provide proper medical intervention. As a consequence, there is a demand for up-to-date, economic, rapid and precise diagnostic assays for...
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As an alternative to blanket dry cow therapy (BDCT), selective dry cow therapy (SDCT) is considered a more judicious approach to antimicrobial use for the purpose of mastitis control during the non-lactating period. The purpose of this research was to evaluate the utility of a 3M Petrifilm-based on-...
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An in vitro comparison of the osteogenic potential of equine stem cell populations and subpopulations from multiple tissue sources was made to identify the ideal equine donor tissue as a source of MSCs to promote bone healing. Equine muscle tissue– and periosteal tissue–derived cells where chara...
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One of the major limitations of the use of optoacoustics (OA) for the imaging of prostate cancer is the relatively low resolution when performed in real time. The work presented in this thesis aims to address this limitation by applying frequency-based analyses, which contribute additional informati...