Search for dissertations about: "virulence gene expression"

Showing result 1 - 5 of 94 swedish dissertations containing the words virulence gene expression.

  2. 1. Foodborne Virulence: Staphylococcus aureus Enterotoxins A and D

    Author : Nina Wallin; Teknisk mikrobiologi; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; environmental factors; phage-encoded virulence; in vivo; enterotoxin D; enterotoxin A; gene expression; Staphylococcus aureus; virulence;

    Abstract : The development of new, minimally processed food products challenges traditional concepts of food safety. How pathogenic bacteria behave in these new matrices is not known. To fill this knowledge gap and enable the production of food that is safe for the consumer, more information on virulence expression of pathogens in food matrices is required. READ MORE

  4. 2. RNA-mediated virulence gene regulation in the human pathogen Listeria monocytogenes

    Author : Edmund Loh; Jörgen Johansson; Nancy Freitag; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Listeria monocytogenes; virulence; ncRNAs; PrfA; 5´-UTRs; Molecular biology; Molekylärbiologi; molekylärbiologi; Molecular Biology;

    Abstract : The Gram-positive human pathogen Listeria monocytogenes uses a wide range of virulence factors for its pathogenesis. The majority of its virulence genes are encoded on a 9-kb pathogenicity island and are controlled by the transcriptional activator PrfA. READ MORE

  5. 3. Regulation of virulence gene expression in Staphylococcus aureus

    Author : Karin Tegmark Wisell; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : The pathogenic bacterium Staphylococcus aureus has the ability to cause a wide variety of human diseases, ranging from superficial abscesses and wound infections to deep and systemic infections such as osteomyelitis, endocarditis and septicaemia. The ability to cause disease has been attributed to a large number of toxins and digesting enzymes as well as to proteins at the bacterial surface that bind various host molecules. READ MORE

  6. 4. Extracellular serine proteases as virulence factors in nematophagous fungi: Molecular characterization and functional analysis of the PII protease in Arthrobotrys oligospora

    Author : Johan Åhman; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Aspergillus niger.; Heterologous expression; Over-expression; Gene-disruption; Transformation system; Serine protease; Biological control; Arthrobotrys oligospora; Fungi; Nematophagous; Biologi;

    Abstract : Nematophagous fungi are parasites of nematodes, thus they have been considered and tested for biological control of parasitic nematodes, but so far with limited success. Due to the fact that the nematode cuticle is composed of proteins it is likely that fungal extracellular proteases are involved in the infection of nematodes. READ MORE

  7. 5. Stress response and virulence in Vibrio anguillarum

    Author : Barbara Weber; Debra L. Milton; James D. Oliver; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Vibrio anguillarum; quorum sensing; Type VI secretion; stress response; virulence; skin colonization; Molecular biology; Molekylärbiologi; molekylärbiologi; Molecular Biology;

    Abstract : Bacteria use quorum sensing, a cell to cell signaling mechanism mediated by small molecules that are produced by specific signal molecule synthases, to regulate gene expression in response to population density. In Vibrio anguillarum, the quorum-sensing phosphorelay channels information from three hybrid sensor kinases VanN, VanQ, CqsS that sense signal molecules produced by the synthases VanM, VanS and CqsA, onto the phosphotransferase VanU, to regulate activity of the response regulator VanO. READ MORE