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  2. Virulence factor - Wikipedia

    en.wikipedia.org/wiki/Virulence_factor

    Examples of virulence factors for Staphylococcus aureus are hyaluronidase, protease, coagulase, lipases, deoxyribonucleases and enterotoxins. Examples for Streptococcus pyogenes are M protein , lipoteichoic acid , hyaluronic acid capsule, destructive enzymes (including streptokinase , streptodornase , and hyaluronidase ), and exotoxins ...

  3. Neisseria meningitidis - Wikipedia

    en.wikipedia.org/wiki/Neisseria_meningitidis

    Other virulence factors include a polysaccharide capsule which prevents host phagocytosis and aids in evasion of the host immune response. Adhesion is another key virulence strategy to successfully invade host cell. There are several known proteins that are involved in adhesion and invasion, or mediate interactions with specific host cell ...

  4. Haemophilus influenzae - Wikipedia

    en.wikipedia.org/wiki/Haemophilus_influenzae

    The pathogenesis of H. influenzae infections is not completely understood, although the presence of the polyribosyl ribitol phosphate (PRP) capsule in encapsulated type b (Hib), a serotype causing conditions such as epiglottitis, is known to be a major factor in virulence. [47] Their capsule allows them to resist phagocytosis and complement ...

  5. Bacterial capsule - Wikipedia

    en.wikipedia.org/wiki/Bacterial_capsule

    Capsules allow adhesion to surfaces and help enable the bacteria to evade the host immune system. [6] The water content in the capsule gives the protection against drying out. The capsule is considered a virulence factor because it enhances the ability of bacteria to cause disease (e.g. prevents phagocytosis).

  6. Virulence - Wikipedia

    en.wikipedia.org/wiki/Virulence

    Virulence is a pathogen's or microorganism's ability to cause damage to a host. In most cases, especially in animal systems, virulence refers to the degree of damage caused by a microbe to its host. [1] The pathogenicity of an organism—its ability to cause disease—is determined by its virulence factors.

  7. Pasteurella multocida - Wikipedia

    en.wikipedia.org/wiki/Pasteurella_multocida

    P. multocida expresses a range of virulence factors including a polysaccharide capsule and the variable carbohydrate surface molecule, lipopolysaccharide (LPS). The capsule has been shown in strains of serogroups A and B to help resist phagocytosis by host immune cells and capsule type A has also been shown to help resist complement-mediated lysis.

  8. Pathogenicity island - Wikipedia

    en.wikipedia.org/wiki/Pathogenicity_island

    Rhodococcus equi virulence plasmid pathogenicity island encodes virulence factors for proliferation in macrophages. The SaPI family of Staphylococcus aureus pathogenicity islands, mobile genetic elements, encode superantigens, including the gene for toxic shock syndrome toxin, and are mobilized at high frequencies by specific bacteriophages. [10]

  9. Neisseria - Wikipedia

    en.wikipedia.org/wiki/Neisseria

    Polysaccharide capsule. N. meningitidis has a polysaccharide capsule that surrounds the outer membrane of the bacterium and protects against soluble immune effector mechanisms within the serum . It is considered to be an essential virulence factor for the bacteria. [ 5 ]