Browsing Doctoral theses (VetMed) by Title
Now showing items 1-20 of 138
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Activation and recirculation of bovine natural killer cells in steady state and inflammation
(PhD Thesis;2015:40, Doctoral thesis, 2017-07-13)Natural killer (NK) cells are innate lymphocytes that act as early responders in the immune response by means of cytotoxicity and production of immunoregulatory cytokines. NK cells in cattle were described a decade ago, ... -
Antibiotic resistance in wastewater
(PhD Thesis;2020:9, Doctoral thesis, 2020)Antibiotic resistance is a characteristic possessed by some bacteria that enables them to withstand the effects of antibiotic treatment. Antibiotic use and abuse may result in development of antibiotic resistant bacteria. ... -
The applicability of milking-time testing in automatic milking systems
(PhD Thesis;2020:5, Doctoral thesis, 2020)Norsk mjølkeproduksjon forandrer seg i retning større produksjonsenheter, økende bruk av automatiske mjølkingssystemer (AMS) og reduserte økonomiske marginer. Til tross for at situasjonen har forbedret seg kraftig de siste ... -
An Atlantic cod (Gadus morhua L.) pituitary model system for reproductive and reprotoxic testing in vitro
(PhD Thesis;2021:14, Doctoral thesis, 2021)Due to factors such as overfishing, climate changes and pollution, most fish stocks are in decline. This is also the case for the commercially important marine species, Atlantic cod (Gadus morhua). As a result, the last ... -
Bacterial impact on growth, health and disease of farmed Atlantic salmon and lumpfish
(PhD Thesis;Thesis number 2021:4, Doctoral thesis, 2021)Despite considerable efforts to improve production with regard to animal welfare, disease control and sustainability in Norwegian aquaculture, both losses and feed conversion rate have not declined during the last 10 years. ... -
Bovine coronavirus in calves : experimental studies on virus shedding, transmission and whole genome sequencing
(PhD Thesis;2018:32, Doctoral thesis, 2018)Bovine coronavirus (BCoV) is a significant cause of respiratory disease and diarrhea in calves and of winter dysentery in adult cattle. These endemic diseases result in substantial economic losses and reduced animal ... -
Bovine staphylococci and their spectrum of antimicrobial resistance and virulence characteristics
(PhD Thesis;2021:60, Doctoral thesis, 2021)Staphylococci are a group of bacteria capable of colonizing and infecting a variety of host species and causing disease in a range of different tissues. Staphylococcus aureus is the most studied staphylococcal species and ... -
Cartilage canals in the pathogenesis of osteochondrosis in horses
(PhD Thesis;2008, Doctoral thesis, 2008)Osteochondrosis (OC) is a common disease that arises in the developing joints of people, horses, pigs, dogs and other species. OC is defined as a disturbance in enchondral ossification, and in horses, the disturbance is ... -
Cephalosporin-resistant escherichia coli in the Norwegian broiler production pyramid : genetic characterization and determination of risk factors
(PhD Thesis;2016:63, Doctoral thesis, 2016-11-24)Antimicrobial resistance is defined as one of our times’ main public health challenges. The prevalence of Escherichia coli displaying resistance against extended-spectrum cephalosporins, a class of antimicrobials that are ... -
Characterization of NK cells in the dog with a focus on the activating receptor NCR1
(PhD Thesis;2016:39, Doctoral thesis, 2016)NK (natural killer) cells are part of the innate immune system and are important for protection against infectious diseases and destruction of potential malignant cells that can develop into cancer. NK cells represent a ... -
Characterization of salmonid alphavirus subtype 3 : recombination and adaptation
(PhD Thesis;2016:59, Doctoral thesis, 2017-07-04)Pancreas disease (PD) affecting Atlantic salmon (Salmo salar L.) and rainbow trout (Oncorhynchus mykiss) is a major burden in European salmonid aquaculture and causes major economical losses every year. The disease is ... -
Characterization of teleost pituitary cell types using single-cell transcriptomics (scRNA-seq)
(PhD Thesis;2022:20, Doctoral thesis, 2022)The pituitary gland is an endocrine gland found in vertebrates. It produces and secretes a variety of essential peptide hormones which regulate several physiological functions, such as reproduction, growth, metabolism, ... -
Chemotherapeutants against salmon lice Lepeophtheirus salmonis : screening of efficacy
(PhD Thesis;2016:80, Doctoral thesis, 2016)Sea lice constitute a continuous challenge for fish farmers in all salmonid production areas. The salmon louse, Lepeophtheirus salmonis, is the most abundant of these in the Northern hemisphere. Through millions of years ... -
Choline is an essential nutrient for post-smolt Atlantic salmon (Salmo salar L)
(PhD Thesis;2020:27, Doctoral thesis, 2020)The aquaculture feed industry continuously works to decrease the share of marine ingredients in the diets by searching for alternative feed ingredients. The increased use of such ingredients, on one hand expose the fish ... -
Chronic wasting disease and sheep : studies of species barriers
(PhD thesis;2024:32, Doctoral thesis, 2024)Prion diseases are neurodegenerative disorders in both humans and animals, and can manifest as sporadic, genetic, or acquired conditions. The shared etiology lies in the conformational transformation of the normal cellular ... -
Clinical and clinicopathological characteristics in canine Vipera berus envenomation
(PhD Thesis;2021:71, Doctoral thesis, 2021)Envenomation of dogs by the European adder (Vipera berus (V. berus)) is a common emergency in veterinary practice in Europe. Despite its common nature, little research exists regarding the clinical effects of this type of ... -
Coccidiosis in lambs : treatment and control
(PhD Thesis;2018:54, Doctoral thesis, 2018)Koksidiose er forårsaket av en gruppe encellede parasitter som kalles Eimeria spp. og er en viktig produksjonsbegrensende sjukdom hos unge dyr blant flere arter, som sau, ku og fjørfe. Disse parasittene gir skader i ... -
Cocktails of persistent organic pollutants lead to behavioural and reproductive toxicity
(PhD thesis;2017:30, Doctoral thesis, 2017)Persistent organic pollutants (POPs) are chemicals that widely distributed in the environment and biota that could cause neurobehavioural and reproductive toxicity. As humans and animals are exposed to a complex mixture ... -
Comparative study of challenge models to evaluate protection after immunization with Piscirickettsia salmonis
(PhD Thesis;2019:75, Doctoral thesis, 2019)The Chilean salmon industry is considered one of the most important aquaculture industries worldwide, only bypassed by Norway. In Chile, salmon represents the second-biggest export product after copper. Due to the fast ... -
Deoxynivalenol in pigs : effects, toxicokinetics, vertical transmission and microbial detoxification
(PhD Thesis;2018:99, Doctoral thesis, 2019)Mycotoxins are secondary metabolites of fungi that can have a variety of adverse effects on animals and humans. One of the most common mycotoxins produced by Fusarium fungi is the trichothecene deoxynivalenol (DON), and ...