Understanding Pathogens, Infection, and Virulence
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Questions and Answers

Which characteristic of pathogens refers to their ability to damage tissue?

  • Entering the body
  • Resisting the defense
  • Damaging the tissue (correct)
  • Multiplying in the host
  • What type of infection is characterized by an initial infection with a microorganism?

  • Re-infection
  • Primary infection (correct)
  • Secondary infection
  • Focal infection
  • Which term is used to describe the extent to which a microorganism can cause damage to an infected host?

  • Pathogen
  • Infection
  • Resistance
  • Virulence (correct)
  • What is the characteristic that differentiates local infections from generalized infections?

    <p>Infection at localized sites (D)</p> Signup and view all the answers

    In which type of infection does a new organism set up an infection due to lowered resistance from pre-existing diseases?

    <p>Secondary infection (C)</p> Signup and view all the answers

    What is the specific gravity of pus?

    <p>Greater than 1.013 (A)</p> Signup and view all the answers

    Which type of cells are predominantly involved in chronic infections?

    <p>Lymphocytes, plasma cells, and monocytes (D)</p> Signup and view all the answers

    What term refers to cell death or tissue destruction at the site of pus formation?

    <p>Necrosis (D)</p> Signup and view all the answers

    Which type of infection elicits an inflammatory response that includes PUS formation?

    <p>Acute suppurative infection (D)</p> Signup and view all the answers

    Which factor contributes to the virulence of microbial strains?

    <p>Invasiveness (C)</p> Signup and view all the answers

    Which bacterial product prevents phagocytosis and fibrin barrier formation?

    <p>Coagulase (D)</p> Signup and view all the answers

    What is the minimum amount of pathogen required to cause an infection in the host known as?

    <p>Minimum infecting dose (MID) (D)</p> Signup and view all the answers

    Which bacterial appendage plays a role in infecting host tissues and spaces?

    <p>Pilli (A)</p> Signup and view all the answers

    What bacterial product has the function of breaking down Hyaluranic acid to infect tissues?

    <p>Hyaluronidase (D)</p> Signup and view all the answers

    Which factor determines the survival and distribution of an organism in a community?

    <p>Communicability (C)</p> Signup and view all the answers

    What is the primary role of invasins in microbial infection?

    <p>Breaking down host defense mechanisms (D)</p> Signup and view all the answers

    Which bacterial component is responsible for dissolving the collagen framework of muscles during infection?

    <p>Collagenase (A)</p> Signup and view all the answers

    What is the main purpose of bacterial adherence to mucosal surfaces?

    <p>To facilitate colonization at the portal of entry (A)</p> Signup and view all the answers

    Which bacterial component disrupts neutrophil membranes and leads to the discharge of lysosomal granules?

    <p>Leukocidin (B)</p> Signup and view all the answers

    Why is the permanent attachment of a microorganism to the eukaryotic surface significant in infection?

    <p>It ensures sustained colonization and pathogenesis (D)</p> Signup and view all the answers

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