Endotoxin Levels and Virulence Factors Quiz
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Questions and Answers

What is the main purpose of bacterial virulence factors?

  • To increase the speed of bacterial cell division
  • To help bacteria communicate with each other
  • To aid in the evasion of the host's immune system (correct)
  • To promote the formation of biofilms
  • Which of the following is NOT a function associated with bacterial virulence factors?

  • Cell division regulation (correct)
  • Nutrient acquisition
  • Immune evasion
  • Biofilm formation
  • What is the role of capsule in bacterial virulence?

  • To promote bacterial motility
  • To aid in toxin secretion
  • To enhance host cell adhesion and colonization
  • To provide protection against host immune defenses (correct)
  • Which virulence factor is responsible for bacterial movement?

    <p>Flagella</p> Signup and view all the answers

    What is the primary function of pili or fimbriae in bacteria?

    <p>Adhesion to host cells</p> Signup and view all the answers

    Which of the following is NOT a function of extracellular matrix toxins produced by bacteria?

    <p>Immune response enhancement</p> Signup and view all the answers

    How do flagella contribute to bacterial pathogenicity?

    <p>By aiding in bacterial motility and colonization</p> Signup and view all the answers

    Which structure helps bacteria adhere to surfaces and form biofilms?

    <p>Pili</p> Signup and view all the answers

    Why is it essential for bacteria to be able to evade the host immune system?

    <p>To establish long-term infections in the host</p> Signup and view all the answers

    What can high endotoxin levels lead to in the body?

    <p>Organ failure and intravascular coagulation</p> Signup and view all the answers

    Which factor plays a significant role in determining access of certain molecules to the cell membrane?

    <p>Capsule</p> Signup and view all the answers

    Which virulence factor participates in biofilm formation?

    <p>Flagella</p> Signup and view all the answers

    How do Pili/fimbriae enhance bacteria's ability to establish infection?

    <p>By aiding in attachment to the host</p> Signup and view all the answers

    What do low density quorum-sensing autoinducers promote?

    <p>Individual cell behavior</p> Signup and view all the answers

    Which virulence factor mediates adherence to surfaces?

    <p>Pili/fimbriae</p> Signup and view all the answers

    In biofilm formation, what kind of substances make up the self-produced matrix?

    <p>Proteins, polysaccharides, released DNA</p> Signup and view all the answers

    What is the role of extracellular matrix toxins in bacterial virulence?

    <p>Participating in biofilm formation</p> Signup and view all the answers

    Which type of toxins modulate the host cell metabolism?

    <p>A-B toxins</p> Signup and view all the answers

    What is the target of Extracellular Matrix (EM) toxins?

    <p>EM targets</p> Signup and view all the answers

    What is the function of Superantigens in the context of bacterial toxins?

    <p>Triggers excessive T lymphocyte stimulation</p> Signup and view all the answers

    Which condition can result from the lack of blood flow due to shock?

    <p>Organic failure</p> Signup and view all the answers

    What allows for the free movement of bacteria according to the text?

    <p>Hyaluronic acids</p> Signup and view all the answers

    Which bacterial toxin type triggers a massive release of cytokines?

    <p>Superantigens</p> Signup and view all the answers

    Bacteriophages (viruses of bacteria) transfer bacterial DNA from one bacterium to another. Some of the transferred DNA may be VF genes. This is describing:

    <p>Transduction</p> Signup and view all the answers

    One bacterium can transfer a plasmid (mobile DNA) to another bacterium. Usually, plasmids contain VF genes. This is describing

    <p>Conjugation</p> Signup and view all the answers

    Which toxin type is known to modulate the host cell metabolism?

    <p>Type III toxins</p> Signup and view all the answers

    What effect do Membrane-damaging toxins have on cells?

    <p>Kill the cells</p> Signup and view all the answers

    Transformation. Bacteria acquire free DNA from the environment. Some of the acquired DNA may be VF genes. This is defining:

    <p>Transformation</p> Signup and view all the answers

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