Bacterial Toxins

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Bacterial Toxins
2013-10-24 00:47:30

pathogenesis and toxigenicity
Show Answers:

  1. What organism produces Hemagglutinin, influenza virus (ha)?

    What is the action of hamagglutinin?

    What is the purpose of hamagglutinin?
    Bordetella pertussis

    • binds lipids to epithelial cells
    • binds glycoproteins to neutophils
    • allows membrane fusion y enveloped viruses

    • facilitates attachment to cells
    • causes neutorophiles to phagocytize the pathogen and allow the pathogen to live within neutrophils.
  2. What organism produces neuraminidase (sialidase)?

    What is the action of neuraminidase?

    What is the purpose?
    Pseudomonas aeruginosa and the influenza virus, Bordetella pertussis.

    cleaves neuramic (sialic) acids.

    enhances attachment to cell receptors
  3. What organisms produce proteins a and g?

    What is the location of the proteins and their organisms?

    What is the cation of these proteins?

    What is their purpose?
    • protein a: Staphylococcus aureus
    • protein g: Streptococcus pyogenes

    cell wall

    binds to the Fc protion of anitbodies.

    interferes with pahocytoces and enhances attachment to host cells while making pathogen resistant to heat and acidic environments.
  4. What is m protein?

    What organism produces that protein?

    What is the action of m protein?

    What is the purpose of matrix protein?
    matrix protein

    Streptococcus pyogenes

    • adherance to keratinocytes
    • prevents opsoniztion by complement

  5. What organisms produce porins?

    What are porins?
    • salmonella enterica and neisseria
    • tirmetric proteins that span the plasma membrane and facilitate the transport of molecules.
  6. What two organisms produce mycolic acid?

    What is the action of Mycolic acid?
    • mycobacterium 
    • nocardia

    • inhibits phagocytosis
    • protects against cheimcal inhibitors of growth.
  7. What two organisms produce h2o2 and ammonia?

    Are they waste products of metabolic activity within the pathogen?

    What is the action of h2o2 and ammonia?
    mycoplasma and ureaplasma


    damages epithelial cells in the respiratory tract and the urogenital tract