Sökning: "virulence gene expression"
Visar resultat 21 - 25 av 93 avhandlingar innehållade orden virulence gene expression.
21. A Molecular Approach for Investigation of the Prevalence and Neurotoxin Formation of Clostridium botulinum in Food Safety Assessment
Sammanfattning : In the development of new food products, more knowledge is needed about the occurrence and quantity of food-borne pathogens in the food chain to be able to implement effective control measures and assure food safety. In addition, improved understanding of how environmental factors and food preservatives effect the microbial virulence expression in foods will enable the formulation of new strategies for food preservation and risk assessment. LÄS MER
22. Studies on bacterial transmission pathways in a high endemic area, with a focus on Helicobacter pylori
Sammanfattning : Even though half of the world’s population is infected with Helicobacter pylori, which causes gastritis, peptic ulcer and gastric cancer, the transmission routes of these bacteria remain unknown despite extensive epidemiological studies. Enterotoxigenic Escherichia coli (ETEC) and Vibrio cholerae are two of the most common causes of acute watery diarrhea in developing countries. LÄS MER
23. The accessory gene regulator, agr, a system for coordinate control of virulence genes in Staphylococcus aureus
Sammanfattning : Bacterial pathogenicity is generally multifactorial, and genes encoding virulence factors are often subject to coordinate regulation. The regulating systems are supposed to adapt the production of virulence factors in response to changes in the environment during the process of infection. LÄS MER
24. Real-time PCR for diagnosis of botulism and quantification of neurotoxin gene expression in Clostridium botulinum
Sammanfattning : The objectives of the work presented in this thesis have been to develop molecular methods for (i) detection of Clostridium botulinum in food and clinical samples, and (ii) monitoring the expression of the neurotoxin gene, cnt, during different growth phases and under different growth conditions. For the diagnosis of botulism, a real-time PCR-based method including an internal amplification control for C. LÄS MER
25. Regulatory pathways and virulence inhibition in Listeria monocytogenes
Sammanfattning : Listeria monocytogenes is a rod-shaped Gram positive bacterium. It generally exist ubiquitously in nature, where it lives as a saprophyte. Occasionally it however enters the food chain, from where it can be ingested by humans and cause gastro-intestinal distress. In immunocompetent individuals L. LÄS MER