Search for dissertations about: "Streptococcus pyogenes"

Showing result 1 - 5 of 84 swedish dissertations containing the words Streptococcus pyogenes.

  1. 1. Resistance to phagocytosis in Streptococcus pyogenes

    Author : Fredric Carlsson; Avdelningen för medicinsk mikrobiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Infektioner; Infections; Medicine human and vertebrates ; Medicin människa och djur ; phagocytosis; innate immunity; complement; Streptococcus pyogenes; M protein;

    Abstract : Phagocytosis of Streptococcus pyogenes is complement dependent. However, the cell wall-associated M protein, which exists in >100 different serotypes (M types), enables the bacteria to evade phagocytosis. READ MORE

  2. 2. Endemic and epidemic Streptococcus pyogenes strains : reservoirs in recurrent pharyngotonsillitis reservoirs in recurrent pharyngotonsillitis reservoirs in recurrent pharyngotonsillitis

    Author : Anders Österlund; Uppsala universitet; []
    Keywords : Medical sciences; Streptococcus pyogenes; epidemiology; invasive disease; recurrent pharyngotonsillitis; RAPD; intracellular; biopsy culture; tonsils; immunohistochemistry; electron microscopy; MEDICIN OCH VÅRD; MEDICINE; MEDICIN; Clinical Bacteriology; klinisk bakteriologi;

    Abstract : The bacterium Streptococcus pyogenes is a common human pathogen known to cause bothuncomplicated and severe infections. Epidemics of invasive disease caused by S. pyogenesserotype T1 were seen in the county of Uppsala, Sweden, in 19881989 and 1994. READ MORE

  3. 3. Streptococcus pyogenes - a manipulator of human defences

    Author : Fredrik Kahn; Infektionsmedicin; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Streptococcus pyogenes; M protein; neutrophils; platelets; platelet-neutrophil complexes; fibrinogen; IgG; abscess; venous thrombosis; heparin binding protein; thrombocytopenia;

    Abstract : Streptococcus pyogenes is a major human pathogen with more than 500 000 casualties annually of which at least 163 000 are due to invasive infections. The remainder is due to post-streptococcal complications with rheu¬matic heart disease constituting the majority. S. READ MORE

  4. 4. Mechanisms of phagocytosis resistance in Streptococcus pyogenes

    Author : Heike Kotarsky; Lund Pediatrik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Microbiology; bacteriology; virology; mycology; Mikrobiologi; bakteriologi; virologi; mykologi; fibrinogen; FHL-1; Factor H; M protein; Streptococcus pyogenes; phagocytosis;

    Abstract : A distinguishing feature of Streptococcus pyogenes (GAS) is their ability to resist phagocytosis in whole human blood in the absence of type-specific antibodies, a property that is dependent on the expression of the surface associated M proteins. A common characteristic of M proteins is their interaction with a variety of host proteins including the complement regulatory protein factor H (FH) and fibrinogen that plays a key role in coagulation. READ MORE

  5. 5. Superantigens in group A streptococcus : gene diversity and humoral immune response

    Author : Linda Maripuu; Mari Norgren; Susan Hollingshead; Umeå universitet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICAL AND HEALTH SCIENCES; Group A streptococcus; Streptococcus pyogenes; superantigen SAg ; SAg-gene profile; M-protein; emm-genotype; biomedicinsk laboratorievetenskap; biomedical laboratory science;

    Abstract : Group A streptococcus (GAS) is a strictly human pathogen that causes infections ranging from asymptomatic carriage to the highly lethal streptococcal toxic shock syndrome (STSS). GAS are classified according to the sequence of the variable 5’ end of the emm-gene that encodes the surface associated M-protein. READ MORE