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Full-Text Articles in Life Sciences
Evaluation Of Microbiome On Chicken Necrotic Enteritis And Growth Performance, Mussie Abraha
Evaluation Of Microbiome On Chicken Necrotic Enteritis And Growth Performance, Mussie Abraha
Graduate Theses and Dissertations
Necrotic enteritis (NE) has re-emerged following restriction of antimicrobial usage and costs $6 billion every year worldwide. The primary objective of the studies was to evaluate prevention and treatment of NE using a microbiota metabolic product, secondary bile acid deoxycholic acid (DCA), in drinking water. Day-old birds were tagged and placed in floor pens. In experiments 1 and 2, the birds were infected with Eimeria maxima (Em) at d 18 and C. perfringens at d 23 and 24 and the birds were euthanized at d 26. In experiment 3, birds were infected with Eimeria at d 20 and C. perfringens …
Understanding The Molecular Strategies Of Campylobacter Jejuni For Survival In Amoeba And Chicken., Deepti Pranay Samarth
Understanding The Molecular Strategies Of Campylobacter Jejuni For Survival In Amoeba And Chicken., Deepti Pranay Samarth
Graduate Theses and Dissertations
Campylobacter jejuni endure to be major cause of gastroenteritis in humans worldwide. C. jejuni is fastidious in laboratory setup but can cause waterborne infection through contaminated water where none of these fastidious conditions are met. This dissertation presents an assortment of studies focused in reviewing three major factors which could present a helping hand to C. jejuni in its environmental survival viz. i) association with free-living amoebae (FLA) ii) horizontal gene transfer (HGT) contributing towards its genetic diversity iii). Viable but non-culturable (VBNC) state.
Acanthamoeba is a FLA linked to environmental survival of many intracellular pathogens, including C. jejuni. In …
Growth And Survivability Of Microorganisms At Martian Temperatures And Pressures, Rebecca Lynne Mickol
Growth And Survivability Of Microorganisms At Martian Temperatures And Pressures, Rebecca Lynne Mickol
Graduate Theses and Dissertations
The discovery of methane in the martian atmosphere via numerous ground- and space-based sources has prompted the study of methanogens as models for life on Mars. Methanogens are microorganisms within the domain Archaea, many of which utilize carbon dioxide (CO2) and hydrogen to produce methane. The non-photosynthetic nature of methanogens indicates that they could exist in sub-surface environments, protected from harmful UV and ionizing radiation on the surface of Mars. These organisms also do not require organics, which are sparse on the planet.
Additionally, the wide variety of environments we find life in on Earth, as well as evidence for …